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Convert Excel to DataTable in C#: Worksheets, Ranges & Beyond
2024-11-14 03:59:00 Written by hayes Liu
Working with Excel data is a common requirement in .NET development. Developers often need to convert Excel files into a DataTable, which provides a structured way to manipulate data, perform LINQ queries, bind to UI controls, or import into a database.
Although this task is common, the implementation details are not always straightforward. Converting Excel data into a DataTable in C# can be achieved in several ways, but traditional approaches often depend on OLEDB drivers or involve lengthy OpenXML programming, both of which add unnecessary complexity and external dependencies. In this guide, we’ll use Spire.XLS for .NET to simplify the process of importing Excel data into a DataTable with C# code. The library provides built-in methods to load Excel files, export worksheets or specific ranges, and work with the data directly in a DataTable.
Quick Navigation
- What is a DataTable and Why Use It?
- Preparing the Environment
- Converting Excel to DataTable in C#
- Bonus: Exporting DataTable Back to Excel
- Handling Large Excel Files and Performance Tips
- Best Practices
- Conclusion
- FAQ
What is a DataTable and Why Use It?
A DataTable in C# is a memory-resident representation of structured data. It allows developers to:
- Store Excel data in tabular form.
- Perform filtering, sorting, and LINQ queries.
- Bind to UI components like DataGridView.
- Bulk insert into relational databases.
Compared with DataSet, a DataTable is lightweight and especially well-suited for working with a single worksheet or range of data.
Preparing the Environment
Before starting, install Spire.XLS for .NET in your project. The easiest way is through NuGet:
Install-Package Spire.XLS
Then, import the required namespaces in your C# code:
using Spire.Xls;
using System.Data;
Converting Excel to DataTable in C#
The following sections demonstrate how to load an Excel file and convert its contents into a DataTable using Spire.XLS. Unlike older methods that depend on OLEDB, this library works without Microsoft Office installation, making it reliable for both desktop and server-side applications.
Load an Excel File
Workbook workbook = new Workbook();
workbook.LoadFromFile("Sample.xlsx");
This creates a Workbook object from the specified Excel file, which you can then use to access individual worksheets.
Convert a Worksheet to DataTable
Worksheet sheet = workbook.Worksheets[0];
DataTable dataTable = sheet.ExportDataTable(sheet.AllocatedRange, true);
Here, the entire first worksheet is exported to a DataTable.
- sheet.AllocatedRange retrieves the used range of the worksheet.
- The true parameter means the first row will be treated as column headers.
This approach is useful when you want to import all data from a sheet directly into a DataTable, for example when binding to a DataGridView or performing bulk inserts into a database.
Convert a Specific Range to DataTable
DataTable partialTable = sheet.ExportDataTable(sheet.Range["A1:C10"], true);
This snippet converts only the range A1:C10 into a DataTable. It’s a practical choice when dealing with large Excel files, where only part of the sheet is needed for processing, or when extracting a specific report section.
Complete Example: Excel Worksheet to DataTable with C#
The following example demonstrates the entire workflow of loading an Excel file and converting it into a DataTable. After running this code, you can process the table further, such as querying, filtering, or inserting into a database.
using Spire.Xls;
using System.Data;
class Program
{
static void Main()
{
// Load Excel file
Workbook workbook = new Workbook();
workbook.LoadFromFile("Sample.xlsx");
// Convert first worksheet to DataTable
Worksheet sheet = workbook.Worksheets[0];
DataTable dataTable = sheet.ExportDataTable(sheet.AllocatedRange, true);
// Print row count
Console.WriteLine("Rows imported: " + dataTable.Rows.Count);
// Print column names
foreach (DataColumn col in dataTable.Columns)
{
Console.Write(col.ColumnName + "\t");
}
Console.WriteLine();
// Print all rows
foreach (DataRow row in dataTable.Rows)
{
foreach (var item in row.ItemArray)
{
Console.Write(item + "\t");
}
Console.WriteLine();
}
}
}
This code loads the first worksheet from an Excel file, exports its content into a DataTable, and prints the table to the console. The following screenshot shows an example of the output:
For scenarios where you need to read Excel data cell by cell, see our guide on reading Excel files in C#.
Bonus: Exporting DataTable Back to Excel in C#
In some cases, you may also need to write modified data from a DataTable back to Excel. This can be done easily:
Workbook wb = new Workbook();
Worksheet ws = wb.Worksheets[0];
// Assume dataTable is already populated
ws.InsertDataTable(dataTable, true, 1, 1);
wb.SaveToFile("Output.xlsx", ExcelVersion.Version2016);
This code inserts the DataTable starting at cell A1 and saves the file. It demonstrates the reverse workflow, ensuring smooth two-way data exchange between Excel and C#. For more details, you can check How to Export DataTable into Excel in C#.
Handling Large Excel Files and Performance Tips
When working with large Excel files, performance optimization is key. Here are a few best practices:
- Read only the required worksheets instead of loading all.
- Export specific ranges rather than entire sheets if possible.
- Use stream-based methods (LoadFromStream) to avoid file locks.
- Minimize memory usage by processing rows iteratively when handling very large DataTables.
Spire.XLS supports .xls, .xlsx, and .csv formats consistently, making it suitable across different scenarios.
Best Practices
When converting Excel to DataTable, keep in mind:
- Data type handling: Excel stores values as text by default. Convert them to int, decimal, or DateTime as needed.
- Null or empty cells: Always check for missing values to prevent runtime errors.
- Database integration: Before bulk inserting into SQL Server or another database, validate and sanitize the DataTable.
Conclusion
Converting Excel data into a DataTable is a common but critical task in .NET development. With Spire.XLS for .NET, you can achieve this efficiently without relying on OLEDB drivers or complex OpenXML parsing.
Whether you need to convert an entire worksheet, extract a specific range, or write data back to Excel, the process remains straightforward and reliable. Mastering this workflow ensures smoother integration between Excel data and your C# applications.
If you want to unlock the full feature set of Spire.XLS, you can apply for a free temporary license. For smaller projects, you can also use Free Spire.XLS for .NET.
FAQ
Q: How do I import data from Excel to DataTable in C#?
Use Worksheet.ExportDataTable() to directly convert worksheet data into a DataTable.
Q: Can I read Excel into DataTable without OLEDB?
Yes. Spire.XLS does not require OLEDB or Microsoft Office installation.
Q: How to read only a specific worksheet or range into a DataTable?
Pass the target Worksheet or Range to ExportDataTable().
Q: Can I export a DataTable back to Excel in C#?
Yes. Use Worksheet.InsertDataTable() and then save the file with SaveToFile().
The sample demonstrates how to convert Excel workbook to PDF file via Spire.XLS.
Excel radar charts, also known as spider charts or web charts, are used to compare multiple data series in different categories. By plotting data points on a multi-axis chart, radar charts provide a clear and intuitive representation of data balance and skewness. This makes them particularly useful for visualizing performance metrics, market analysis, and other situations where multiple dimensions need to be compared. In this article, you will learn how to create a radar chart in Excel in C# using Spire.XLS for .NET.
Install Spire.XLS for .NET
To begin with, you need to add the DLL files included in the Spire.XLS for .NET package as references in your .NET project. The DLL files can be either downloaded from this link or installed via NuGet.
PM> Install-Package Spire.XLS
Create a Simple Radar Chart in Excel in C#
Spire.XLS for .NET provides the Worksheet.Charts.Add(ExcelChartType.Radar) method to add a standard radar chart to an Excel worksheet. The following are the detailed steps:
- Create a Workbook instance.
- Get a specified worksheet using Workbook.Worksheets[sheetIndex] property.
- Add the chart data to specified cells and set the cell styles.
- Add a simple radar chart to the worksheet using Worksheet.Charts.Add(ExcelChartType.Radar) method.
- Set data range for the chart using Chart.DataRange property.
- Set the position, legend and title of the chart.
- Save the result file using Workbook.SaveToFile() method.
- C#
using Spire.Xls;
using System.Drawing;
namespace ExcelRadarChart
{
class Program
{
static void Main(string[] args)
{
//Create a Workbook instance
Workbook workbook = new Workbook();
//Get the first worksheet
Worksheet sheet = workbook.Worksheets[0];
//Add chart data to specified cells
sheet.Range["A1"].Value = "Rating";
sheet.Range["A2"].Value = "Communication";
sheet.Range["A3"].Value = "Experience";
sheet.Range["A4"].Value = "Work Efficiency";
sheet.Range["A5"].Value = "Leadership";
sheet.Range["A6"].Value = "Problem-solving";
sheet.Range["A7"].Value = "Teamwork";
sheet.Range["B1"].Value = "Jonathan";
sheet.Range["B2"].NumberValue = 4;
sheet.Range["B3"].NumberValue = 3;
sheet.Range["B4"].NumberValue = 4;
sheet.Range["B5"].NumberValue = 3;
sheet.Range["B6"].NumberValue = 5;
sheet.Range["B7"].NumberValue = 5;
sheet.Range["C1"].Value = "Ryan";
sheet.Range["C2"].NumberValue = 2;
sheet.Range["C3"].NumberValue = 5;
sheet.Range["C4"].NumberValue = 4;
sheet.Range["C5"].NumberValue = 4;
sheet.Range["C6"].NumberValue = 3;
sheet.Range["C7"].NumberValue = 3;
//Set font styles
sheet.Range["A1:C1"].Style.Font.IsBold = true;
sheet.Range["A1:C1"].Style.Font.Size = 11;
sheet.Range["A1:C1"].Style.Font.Color = Color.White;
//Set row height and column width
sheet.Rows[0].RowHeight = 20;
sheet.Range["A1:C7"].Columns[0].ColumnWidth = 15;
//Set cell styles
sheet.Range["A1:C1"].Style.Color = Color.DarkBlue;
sheet.Range["A2:C7"].Borders[BordersLineType.EdgeBottom].LineStyle = LineStyleType.Thin;
sheet.Range["A2:C7"].Style.Borders[BordersLineType.EdgeBottom].Color = Color.DarkBlue;
sheet.Range["B1:C7"].HorizontalAlignment = HorizontalAlignType.Center;
sheet.Range["A1:C7"].VerticalAlignment = VerticalAlignType.Center;
//Add a radar chart to the worksheet
Chart chart = sheet.Charts.Add(ExcelChartType.Radar);
//Set position of chart
chart.LeftColumn = 4;
chart.TopRow = 4;
chart.RightColumn = 14;
chart.BottomRow = 29;
//Set data range for the chart
chart.DataRange = sheet.Range["A1:C7"];
chart.SeriesDataFromRange = false;
//Set and format chart title
chart.ChartTitle = "Employee Performance Appraisal";
chart.ChartTitleArea.IsBold = true;
chart.ChartTitleArea.Size = 14;
//Set position of chart legend
chart.Legend.Position = LegendPositionType.Corner;
//Save the result file
workbook.SaveToFile("ExcelRadarChart.xlsx", ExcelVersion.Version2016);
}
}
}
Create a Filled Radar Chart in Excel in C#
A filled radar chart is a variation of a standard radar chart, with the difference that the area between each data point is filled with color. The following are the steps to create a filled radar chart using C#:
- Create a Workbook instance.
- Get a specified worksheet using Workbook.Worksheets[sheetIndex] property.
- Add the chart data to specified cells and set the cell styles.
- Add a filled radar chart to the worksheet using Worksheet.Charts.Add(ExcelChartType.RadarFilled) method.
- Set data range for the chart using Chart.DataRange property.
- Set the position, legend and title of the chart.
- Save the result file using Workbook.SaveToFile() method.
- C#
using Spire.Xls;
using System.Drawing;
namespace ExcelRadarChart
{
class Program
{
static void Main(string[] args)
{
//Create a Workbook instance
Workbook workbook = new Workbook();
//Get the first worksheet
Worksheet sheet = workbook.Worksheets[0];
//Add chart data to specified cells
sheet.Range["A1"].Value = "Rating";
sheet.Range["A2"].Value = "Communication";
sheet.Range["A3"].Value = "Experience";
sheet.Range["A4"].Value = "Work Efficiency";
sheet.Range["A5"].Value = "Leadership";
sheet.Range["A6"].Value = "Problem-solving";
sheet.Range["A7"].Value = "Teamwork";
sheet.Range["B1"].Value = "Jonathan";
sheet.Range["B2"].NumberValue = 4;
sheet.Range["B3"].NumberValue = 3;
sheet.Range["B4"].NumberValue = 4;
sheet.Range["B5"].NumberValue = 3;
sheet.Range["B6"].NumberValue = 5;
sheet.Range["B7"].NumberValue = 5;
sheet.Range["C1"].Value = "Ryan";
sheet.Range["C2"].NumberValue = 2;
sheet.Range["C3"].NumberValue = 5;
sheet.Range["C4"].NumberValue = 4;
sheet.Range["C5"].NumberValue = 4;
sheet.Range["C6"].NumberValue = 3;
sheet.Range["C7"].NumberValue = 3;
//Set font styles
sheet.Range["A1:C1"].Style.Font.IsBold = true;
sheet.Range["A1:C1"].Style.Font.Size = 11;
sheet.Range["A1:C1"].Style.Font.Color = Color.White;
//Set row height and column width
sheet.Rows[0].RowHeight = 20;
sheet.Range["A1:C7"].Columns[0].ColumnWidth = 15;
//Set cell styles
sheet.Range["A1:C1"].Style.Color = Color.DarkBlue;
sheet.Range["A2:C7"].Borders[BordersLineType.EdgeBottom].LineStyle = LineStyleType.Thin;
sheet.Range["A2:C7"].Style.Borders[BordersLineType.EdgeBottom].Color = Color.DarkBlue;
sheet.Range["B1:C7"].HorizontalAlignment = HorizontalAlignType.Center;
sheet.Range["A1:C7"].VerticalAlignment = VerticalAlignType.Center;
//Add a filled radar chart to the worksheet
Chart chart = sheet.Charts.Add(ExcelChartType.RadarFilled);
//Set position of chart
chart.LeftColumn = 4;
chart.TopRow = 4;
chart.RightColumn = 14;
chart.BottomRow = 29;
//Set data range for the chart
chart.DataRange = sheet.Range["A1:C7"];
chart.SeriesDataFromRange = false;
//Set and format chart title
chart.ChartTitle = "Employee Performance Appraisal";
chart.ChartTitleArea.IsBold = true;
chart.ChartTitleArea.Size = 14;
//Set position of chart legend
chart.Legend.Position = LegendPositionType.Corner;
//Save the result file
workbook.SaveToFile("FilledRadarChart.xlsx", ExcelVersion.Version2016);
}
}
}
Apply for a Temporary License
If you'd like to remove the evaluation message from the generated documents, or to get rid of the function limitations, please request a 30-day trial license for yourself.
A line chart, also known as a line graph, is a type of chart that displays information as a series of data points connected by straight line segments. It is generally used to show the changes of information over a period of time, such as years, months or days. In this article, you will learn how to create a line chart in Excel in C# and VB.NET using Spire.XLS for .NET.
Install Spire.XLS for .NET
To begin with, you need to add the DLL files included in the Spire.XLS for .NET package as references in your .NET project. The DLL files can be either downloaded from this link or installed via NuGet.
PM> Install-Package Spire.XLS
Create a Line Chart in Excel using C# and VB.NET
The following are the main steps to create a line chart:
- Create an instance of Workbook class.
- Get the first worksheet by its index (zero-based) though Workbook.Worksheets[sheetIndex] property.
- Add some data to the worksheet.
- Add a line chart to the worksheet using Worksheet.Charts.Add(ExcelChartType.Line) method.
- Set data range for the chart through Chart.DataRange property.
- Set position, title, category axis title and value axis title for the chart.
- Loop through the data series of the chart, show data labels for the data points of each data series by setting the ChartSerie.DataPoints.DefaultDataPoint.DataLabels.HasValue property as true.
- Set the position of chart legend through Chart.Legend.Position property.
- Save the result file using Workbook.SaveToFile() method.
- C#
- VB.NET
using Spire.Xls;
using Spire.Xls.Charts;
using System.Drawing;
namespace CreateLineChart
{
class Program
{
static void Main(string[] args)
{
//Create a Workbook instance
Workbook workbook = new Workbook();
//Get the first worksheet
Worksheet sheet = workbook.Worksheets[0];
//Set sheet name
sheet.Name = "Line Chart";
//Hide gridlines
sheet.GridLinesVisible = false;
//Add some data to the the worksheet
sheet.Range["A1"].Value = "Country";
sheet.Range["A2"].Value = "Cuba";
sheet.Range["A3"].Value = "Mexico";
sheet.Range["A4"].Value = "France";
sheet.Range["A5"].Value = "German";
sheet.Range["B1"].Value = "Jun";
sheet.Range["B2"].NumberValue = 3300;
sheet.Range["B3"].NumberValue = 2300;
sheet.Range["B4"].NumberValue = 4500;
sheet.Range["B5"].NumberValue = 6700;
sheet.Range["C1"].Value = "Jul";
sheet.Range["C2"].NumberValue = 7500;
sheet.Range["C3"].NumberValue = 2900;
sheet.Range["C4"].NumberValue = 2300;
sheet.Range["C5"].NumberValue = 4200;
sheet.Range["D1"].Value = "Aug";
sheet.Range["D2"].NumberValue = 7700;
sheet.Range["D3"].NumberValue = 6900;
sheet.Range["D4"].NumberValue = 8400;
sheet.Range["D5"].NumberValue = 4200;
sheet.Range["E1"].Value = "Sep";
sheet.Range["E2"].NumberValue = 8000;
sheet.Range["E3"].NumberValue = 7200;
sheet.Range["E4"].NumberValue = 8300;
sheet.Range["E5"].NumberValue = 5600;
//Set font and fill color for specified cells
sheet.Range["A1:E1"].Style.Font.IsBold = true;
sheet.Range["A2:E2"].Style.KnownColor = ExcelColors.LightYellow;
sheet.Range["A3:E3"].Style.KnownColor = ExcelColors.LightGreen1;
sheet.Range["A4:E4"].Style.KnownColor = ExcelColors.LightOrange;
sheet.Range["A5:E5"].Style.KnownColor = ExcelColors.LightTurquoise;
//Set cell borders
sheet.Range["A1:E5"].Style.Borders[BordersLineType.EdgeTop].Color = Color.FromArgb(0, 0, 128);
sheet.Range["A1:E5"].Style.Borders[BordersLineType.EdgeTop].LineStyle = LineStyleType.Thin;
sheet.Range["A1:E5"].Style.Borders[BordersLineType.EdgeBottom].Color = Color.FromArgb(0, 0, 128);
sheet.Range["A1:E5"].Style.Borders[BordersLineType.EdgeBottom].LineStyle = LineStyleType.Thin;
sheet.Range["A1:E5"].Style.Borders[BordersLineType.EdgeLeft].Color = Color.FromArgb(0, 0, 128);
sheet.Range["A1:E5"].Style.Borders[BordersLineType.EdgeLeft].LineStyle = LineStyleType.Thin;
sheet.Range["A1:E5"].Style.Borders[BordersLineType.EdgeRight].Color = Color.FromArgb(0, 0, 128);
sheet.Range["A1:E5"].Style.Borders[BordersLineType.EdgeRight].LineStyle = LineStyleType.Thin;
//Set number format
sheet.Range["B2:D5"].Style.NumberFormat = "\"$\"#,##0";
//Add a line chart to the worksheet
Chart chart = sheet.Charts.Add(ExcelChartType.Line);
//Set data range for the chart
chart.DataRange = sheet.Range["A1:E5"];
//Set position of the chart
chart.LeftColumn = 1;
chart.TopRow = 6;
chart.RightColumn = 11;
chart.BottomRow = 29;
//Set and format chart title
chart.ChartTitle = "Sales Report";
chart.ChartTitleArea.IsBold = true;
chart.ChartTitleArea.Size = 12;
//Set and format category axis title
chart.PrimaryCategoryAxis.Title = "Month";
chart.PrimaryCategoryAxis.Font.IsBold = true;
chart.PrimaryCategoryAxis.TitleArea.IsBold = true;
//Set and format value axis title
chart.PrimaryValueAxis.Title = "Sales (in USD)";
chart.PrimaryValueAxis.HasMajorGridLines = false;
chart.PrimaryValueAxis.TitleArea.TextRotationAngle = -90;
chart.PrimaryValueAxis.MinValue = 1000;
chart.PrimaryValueAxis.TitleArea.IsBold = true;
//Loop through the data series of the chart
foreach (ChartSerie cs in chart.Series)
{
cs.Format.Options.IsVaryColor = true;
//Show data labels for data points
cs.DataPoints.DefaultDataPoint.DataLabels.HasValue = true;
}
//Set position of chart legend
chart.Legend.Position = LegendPositionType.Top;
//Save the result file
workbook.SaveToFile("LineChart.xlsx", ExcelVersion.Version2016);
}
}
}
Apply for a Temporary License
If you'd like to remove the evaluation message from the generated documents, or to get rid of the function limitations, please request a 30-day trial license for yourself.
Why Export Datatable to RTF?
RTF is a Microsoft specification and certified file format used with DOC and DOCX. It is a core part of the Microsoft Office system. RTF usually used for cut and paste, including paste special and used when opening documents into Word. RTF does not cause document corruption.
RTF allows Workshare tremendous flexibility in successfully translating between any number of document types because of its ubiquity. Workshare products can not only maintain document fidelity, but provide portability advantages when moving around different Microsoft Word systems, or translating to other document types.
How to Export DataTable to RTF through DataGridView?
Download Spire.DataExport (or Spire.Office) with .NET Framework together. Only 2 Simple steps you can finish the whole datatable to RTF exporting process.
Step 1: Load Data Information
Before exporting data from DataTable, we should load data information from data source. And select which information we need export. Through DataGridVew, we even can preview and modify data information. So, in this step, our job is to prepare data which is about to be exported out.
private void btnLoad_Click(object sender, EventArgs e)
{
oleDbConnection.ConnectionString = this.textBox1.Text;
OleDbCommand oleDbCommand = new OleDbCommand();
oleDbCommand.CommandText = this.textBox2.Text;
oleDbCommand.Connection = oleDbConnection;
using (OleDbDataAdapter da = new OleDbDataAdapter(oleDbCommand))
{
DataTable dt = new DataTable();
da.Fill(dt);
dataGridView1.DataSource = dt;
}
}
Effect Screenshot
Step 2: Set Export into RTF
Spire.DataExport allows user to export data into most popular file formats including MS Excel, RTF, HTML, PDF, XML, CSV, DBF, DIF, etc. Here we need set it as RTF format. Spire.DataExport will create a new RTF file and through DataGridView export data into RTF file. You also can rename the file as you like.
private void btnRun_Click(object sender, EventArgs e)
{
Spire.DataExport.RTF.RTFExport RTFExport = new Spire.DataExport.RTF.RTFExport();
RTFExport.DataSource = Spire.DataExport.Common.ExportSource.DataTable;
RTFExport.DataTable = this.dataGridView1.DataSource as DataTable;
RTFExport.ActionAfterExport = Spire.DataExport.Common.ActionType.OpenView;
RTFExport.FileName = "RTF0722.rtf";
RTFExport.SaveToFile();
}
Effect Screenshot
When we export data out from Database we may have requirements of exporting data from Datatable to CSV because CSV is a simple file format that is widely supported. CSV (The comma-separated values) file format is a set of file formats used to store tabular data in which numbers and text are stored in plain textual form that can be read in a text editor. Lines in the text file represent rows of a table, and commas in a line separate what are fields in the table row.
Here we mainly discuss how to Export Datatable to CSV with Spire.DataExport for .NET.
Download Spire.DataExport (or Spire.Office) with .NET Framework together. Only 2 Simple steps you can finish the whole datatable to CSV exporting process.
Step 1: Load Data Information
Before exporting data from DataTable, we should load data information from data source. And select which information we need export. Through DataGridVew, we even can preview and modify data information. So, in this step, our job is to prepare data which is about to be exported out.
private void btnLoad_Click(object sender, EventArgs e)
{
using (OleDbConnection oleDbConnection = new OleDbConnection())
{
oleDbConnection.ConnectionString = this.textBox1.Text;
OleDbCommand oleDbCommand = new OleDbCommand();
oleDbCommand.CommandText = this.textBox2.Text;
oleDbCommand.Connection = oleDbConnection;
using (OleDbDataAdapter da = new OleDbDataAdapter(oleDbCommand))
{
DataTable dt = new DataTable();
da.Fill(dt);
dataGridView1.DataSource = dt;
}
}
}
Effect Screenshot
Step 2: Set Export into CSV
Spire.DataExport allows user to export data into most popular file formats including MS Excel, MS Word, HTML, PDF, XML, CSV, DBF, DIF, etc. Here we need set it as CSV format. Spire.DataExport will create a new CSV file and through DataGridView export data into CSV file. You also can rename the file as you like.
private void btnRUN_Click(object sender, EventArgs e)
{
TXTExport CSVExport = new TXTExport();
CSVExport.DataSource = Spire.DataExport.Common.ExportSource.DataTable;
CSVExport.DataTable = this.dataGridView1.DataSource as DataTable;
CSVExport.ActionAfterExport = Spire.DataExport.Common.ActionType.OpenView;
CSVExport.FileName = "CSV0721.csv";
CSVExport.SaveToFile();
}
Effect Screenshot
A bar chart in Excel is a data visualization tool that presents data using horizontal bars. The length of each bar in the chart is proportional to the value it represents. Using a bar chart, you can easily compare values across two or more categories. In this article, you will learn how to create bar chart in Excel in C# and VB.NET using Spire.XLS for .NET.
Install Spire.XLS for .NET
To begin with, you need to add the DLL files included in the Spire.XLS for .NET package as references in your .NET project. The DLL files can be either downloaded from this link or installed via NuGet.
PM> Install-Package Spire.XLS
Create Bar Chart in Excel in C# and VB.NET
The following are the main steps to create a bar chart:
- Create an instance of Workbook class.
- Get the first worksheet by its index (zero-based) though Workbook.Worksheets[sheetIndex] property.
- Add some data to the worksheet.
- Add a clustered bar chart to the worksheet using Worksheet.Charts.Add(ExcelChartType.BarClustered) method.
- Set data range for the chart through Chart.DataRange property.
- Set position, title, category axis title and value axis title for the chart.
- Loop through the data series of the chart, show data labels for the data points of each data series by setting the ChartSerie.DataPoints.DefaultDataPoint.DataLabels.HasValue property as true.
- Set the position of chart legend through Chart.Legend.Position property.
- Save the result file using Workbook.SaveToFile() method.
- C#
- VB.NET
using Spire.Xls;
using Spire.Xls.Charts;
using System.Drawing;
namespace CreateBarChart
{
class Program
{
static void Main(string[] args)
{
//Create a Workbook instance
Workbook workbook = new Workbook();
//Get the first worksheet
Worksheet sheet = workbook.Worksheets[0];
//Set sheet name
sheet.Name = "Bar Chart";
//Hide gridlines
sheet.GridLinesVisible = false;
//Add data to the the worksheet
sheet.Range["A1"].Value = "Country";
sheet.Range["A2"].Value = "Cuba";
sheet.Range["A3"].Value = "Mexico";
sheet.Range["A4"].Value = "France";
sheet.Range["A5"].Value = "German";
sheet.Range["B1"].Value = "Jun";
sheet.Range["B2"].NumberValue = 6000;
sheet.Range["B3"].NumberValue = 8000;
sheet.Range["B4"].NumberValue = 9000;
sheet.Range["B5"].NumberValue = 8500;
sheet.Range["C1"].Value = "Aug";
sheet.Range["C2"].NumberValue = 3000;
sheet.Range["C3"].NumberValue = 2000;
sheet.Range["C4"].NumberValue = 2300;
sheet.Range["C5"].NumberValue = 4200;
//Set cell styles
sheet.Range["A1:C1"].Style.Font.IsBold = true;
sheet.Range["A2:C2"].Style.KnownColor = ExcelColors.LightYellow;
sheet.Range["A3:C3"].Style.KnownColor = ExcelColors.LightGreen1;
sheet.Range["A4:C4"].Style.KnownColor = ExcelColors.LightOrange;
sheet.Range["A5:C5"].Style.KnownColor = ExcelColors.LightTurquoise;
//Set cell borders
sheet.Range["A1:C5"].Style.Borders[BordersLineType.EdgeTop].Color = Color.FromArgb(0, 0, 128);
sheet.Range["A1:C5"].Style.Borders[BordersLineType.EdgeTop].LineStyle = LineStyleType.Thin;
sheet.Range["A1:C5"].Style.Borders[BordersLineType.EdgeBottom].Color = Color.FromArgb(0, 0, 128);
sheet.Range["A1:C5"].Style.Borders[BordersLineType.EdgeBottom].LineStyle = LineStyleType.Thin;
sheet.Range["A1:C5"].Style.Borders[BordersLineType.EdgeLeft].Color = Color.FromArgb(0, 0, 128);
sheet.Range["A1:C5"].Style.Borders[BordersLineType.EdgeLeft].LineStyle = LineStyleType.Thin;
sheet.Range["A1:C5"].Style.Borders[BordersLineType.EdgeRight].Color = Color.FromArgb(0, 0, 128);
sheet.Range["A1:C5"].Style.Borders[BordersLineType.EdgeRight].LineStyle = LineStyleType.Thin;
//Set number format
sheet.Range["B2:C5"].Style.NumberFormat = "\"$\"#,##0";
//Add a clustered bar chart to the worksheet
Chart chart = sheet.Charts.Add(ExcelChartType.BarClustered);
//Set data range for the chart
chart.DataRange = sheet.Range["A1:C5"];
chart.SeriesDataFromRange = false;
//Set position of the chart
chart.LeftColumn = 1;
chart.TopRow = 6;
chart.RightColumn = 11;
chart.BottomRow = 29;
//Set and format chart title
chart.ChartTitle = "Sales Report";
chart.ChartTitleArea.IsBold = true;
chart.ChartTitleArea.Size = 12;
//Set and format category axis title
chart.PrimaryCategoryAxis.Title = "Country";
chart.PrimaryCategoryAxis.Font.IsBold = true;
chart.PrimaryCategoryAxis.TitleArea.IsBold = true;
chart.PrimaryCategoryAxis.TitleArea.TextRotationAngle = 90;
//Set and format value axis title
chart.PrimaryValueAxis.Title = "Sales(in USD)";
chart.PrimaryValueAxis.HasMajorGridLines = false;
chart.PrimaryValueAxis.MinValue = 1000;
chart.PrimaryValueAxis.TitleArea.IsBold = true;
//Show data labels for data points
foreach (ChartSerie cs in chart.Series)
{
cs.Format.Options.IsVaryColor = true;
cs.DataPoints.DefaultDataPoint.DataLabels.HasValue = true;
}
//Set position of chart legend
chart.Legend.Position = LegendPositionType.Top;
//Save the result file
workbook.SaveToFile("CreateBarChart.xlsx", ExcelVersion.Version2016);
}
}
}
Apply for a Temporary License
If you'd like to remove the evaluation message from the generated documents, or to get rid of the function limitations, please request a 30-day trial license for yourself.
DBF is a format created by Ashton-Tate and can be recognized by ACT, Lipper, FoxPro, Arago, Wordtech, Xbase and other programs related with Database. Although MS Excel has been the most popular data form software application, DBF format data form files still used widely. So sometimes we may have requirements to export data from datatable to DBF. And with Spire.DataExport, we can export datatable to DBF through DataGridView effortlessly!
Download Spire.DataExport (or Spire.Office) with .NET Framework together. Only 2 Simple steps you can finish the whole datatable to DBF exporting process.
Step 1: Load Data Information
Before exporting data from DataTable, we should load data information from data source. And select which information we need export. Through DataGridVew, we even can preview and modify data information. So, in this step, our job is to prepare data which are about to be exported out.
private void btnLoad_Click(object sender, EventArgs e)
{
using (OleDbConnection oleDbConnection = new OleDbConnection())
{
oleDbConnection.ConnectionString = this.textBox1.Text;
OleDbCommand oleDbCommand = new OleDbCommand();
oleDbCommand.CommandText = this.textBox2.Text;
oleDbCommand.Connection = oleDbConnection;
using (OleDbDataAdapter da = new OleDbDataAdapter(oleDbCommand))
{
DataTable dt = new DataTable();
da.Fill(dt);
dataGridView1.DataSource = dt;
}
}
}
Effect Screenshot
Step 2: Set Export into DBF
Spire.DataExport allows user to export data into most popular file formats including MS Excel, MS Word, HTML, PDF, XML, CSV, DBF, DIF, etc. Here we need set it as DBF format. Spire.DataExport will create a new DBF file and through DataGridView export data into DBF file. You also can rename the file as you like.
private void btnRun_Click(object sender, EventArgs e)
{
Spire.DataExport.DBF.DBFExport DBFExport = new Spire.DataExport.DBF.DBFExport();
DBFExport.DataSource = Spire.DataExport.Common.ExportSource.DataTable;
DBFExport.DataTable = this.dataGridView1.DataSource as DataTable;
DBFExport.ActionAfterExport = Spire.DataExport.Common.ActionType.OpenView;
DBFExport.FileName = "DBF0401.dbf";
DBFExport.SaveToFile();
}
Effect Screenshot
This article will show you how to use Spire.DataExport to Export Datatable to PDF through DataGridView. Through DataGridView, users can preview data information and modify the information if they think it’s not correct before exporting data. With Spire.DataExport, this whole exporting process could be fast and easy.
Download Spire.DataExport (or Spire.Office) with .NET Framework together. Only 2 Simple steps you can finish the whole datatable to PDF exporting process.
Step 1: Load Data Information
Before exporting data from DataTable, we should load data information from data source. And select which information we need export. Through DataGridVew, we even can preview and modify data information. So, in this step, our job is to prepare data which is about to be exported out.
private void btnLoad_Click(object sender, EventArgs e)
{
using (OleDbConnection oleDbConnection = new OleDbConnection())
{
oleDbConnection.ConnectionString = this.tbCS.Text;
OleDbCommand oleDbCommand = new OleDbCommand();
oleDbCommand.CommandText = this.tbCT.Text;
oleDbCommand.Connection = oleDbConnection;
using (OleDbDataAdapter da = new OleDbDataAdapter(oleDbCommand))
{
DataTable dt = new DataTable();
da.Fill(dt);
dataGridView.DataSource = dt;
}
}
}
Effect Screenshot
Step 2: Set Export into PDF
Spire.DataExport allows user to export data into most popular file formats including MS Excel, MS Word, HTML, PDF, XML, CSV, DBF, DIF, etc. Here we need set it as PDF format. Spire.DataExport will create a new PDF file and through DataGridView export data into PDF file. You also can rename the file as you like.
private void btnRun_Click(object sender, EventArgs e)
{
Spire.DataExport.PDF.PDFExport PDFExport = new Spire.DataExport.PDF.PDFExport();
PDFExport.DataSource = Spire.DataExport.Common.ExportSource.DataTable;
PDFExport.DataTable = this.dataGridView.DataSource as DataTable;
PDFExport.ActionAfterExport = Spire.DataExport.Common.ActionType.OpenView;
PDFExport.SaveToFile("20110223.pdf");
}
Effect Screenshot
In daily work, you may come across some situations where you need to convert Excel to images, such as attaching a cell range to a PowerPoint presentation or safely sending your spreadsheet data via email. This article will show you how to programmatically convert Excel to images from the following two aspects using Spire.XLS for .NET.
Install Spire.XLS for .NET
To begin with, you need to add the DLL files included in the Spire.XLS for .NET package as references in your .NET project. The DLL files can be either downloaded from this link or installed via NuGet.
PM> Install-Package Spire.XLS
Convert a Whole Excel Worksheet to an Image
The following are steps to convert a whole Excel worksheet to an image.
- Create a Workbook instance.
- Load an Excel sample document using Workbook.LoadFromFile() method.
- Get a specific worksheet of the document using Workbook.Worksheets[] property.
- Save the worksheet as an image using Worksheet.SaveToImage() method.
- C#
- VB.NET
using Spire.Xls;
namespace Xls2Image
{
class Program
{
static void Main(string[] args)
{
//Create a Workbook instance
Workbook workbook = new Workbook();
//Load an Excel sample document
workbook.LoadFromFile(@"sample.xlsx");
//Get the first worksheet
Worksheet sheet = workbook.Worksheets[0];
//Save the worksheet as an image
sheet.SaveToImage("XlsToImage.jpg");
}
}
}
Convert a Specific Cell Range to an Image
In addition to converting a whole worksheet to an image, Spire.XLS for .NET also supports converting a specific cell range of a worksheet to an image. Detailed steps are listed below.
- Create a Workbook instance.
- Load an Excel sample document using Workbook.LoadFromFile() method.
- Get a specific worksheet of the document using Workbook.Worksheets[] property.
- Specify a cell range and save it as the Image object using Worksheet.ToImage() method, and then save the object as a certain image format using Image.Save() method.
- C#
- VB.NET
using Spire.Xls;
using System.Drawing.Imaging;
namespace SpecificCellsToImage
{
class Program
{
static void Main(string[] args)
{
//Create a Workbook instance
Workbook workbook = new Workbook();
//Load an Excel sample document
workbook.LoadFromFile(@"sample.xlsx");
//Get the first worksheet
Worksheet sheet = workbook.Worksheets[0];
//Specify a cell range and save it to a certain image format
sheet.ToImage(1, 1, 6, 4).Save("CellRangeToImage.png", ImageFormat.Png);
}
}
}
Apply for a Temporary License
If you'd like to remove the evaluation message from the generated documents, or to get rid of the function limitations, please request a 30-day trial license for yourself.
