如何在 VB.NET 中将 DataTable 导出到 Excel

1. IronXL

IronXL is a powerful library designed to facilitate the creation, reading, and manipulation of Excel files in VB.NET applications. With IronXL, developers can quickly and easily incorporate Excel worksheet functionality into their applications without requiring any specialized knowledge or expertise in Excel sheets. The library provides a range of features for working with Excel files, including the ability to read and write data, format cells, create charts and graphs, and much more. IronXL supports both XLS and XLSX file formats and can be used with a variety of Excel versions. Using IronXL you can also add column headers in .NET code.

2. Prerequisites

To successfully write code using IronXL in VB.NET, several prerequisites must be in place:

1. Visual Studio must be installed on your system to create a VB.NET project. If you don't have Visual Studio, you can download it from the Microsoft website.
2. The .NET Framework must be installed on your system, and IronXL requires version 4.0 or later to function correctly.
3. You need to install the IronXL library to use it in your VB.NET project.

Ensuring that these prerequisites are met will enable you to write code successfully using IronXL in VB.NET.

3. Create a VB.NET Project in Visual Studio

To create VB.NET in Visual Studio, follow these steps to create a VB.NET project in Visual Studio:

1. Open Visual Studio.
2. Click on "Create a new project" on the start page, or go to "File" > "New" > "Project".
3. In the "New Project" dialog box, select "Visual Basic" in the left pane.

4. Choose the type of project you want to create, such as "Windows Forms App" or "Console App". This tutorial will use a Console App.

   Create a new project in Visual Studio

5. Enter a name for your project and choose a location to save it.

   Configure your project

6. Then select the .NET Core version and click on "Create".

   .NET Framework selection

7. Visual Studio will create a new project with some default files and folders.

You are now ready to start writing your VB.NET code in Visual Studio.

4. Install IronXL

The IronXL Library can be downloaded and installed in different ways:

• Using Visual Studio NuGet packages
• Using the Visual Studio Command Line.

5. Export DataTable to Excel File using IronXL

The process of exporting a DataTable to an Excel file is a common task in data processing, and IronXL makes it easy to accomplish this in VB.NET. First, you need to create a new DataTable with the data you want to export. Then, you can use IronXL's Workbook object to create a new Excel workbook and add a worksheet to it. After that, you can populate the worksheet with the DataTable columns' data using IronXL's Range object.

Imports IronXL
Imports System
Imports System.Data

Module Program
    Sub Main(args As String())
        ' Create a new DataTable
        Dim table As New DataTable()

        ' Add a column to the DataTable
        table.Columns.Add("DataSet_Daily_Household", GetType(String))

        ' Add rows to the DataTable
        table.Rows.Add("Glass")
        table.Rows.Add("Plates")
        table.Rows.Add("Match Sticks")
        table.Rows.Add("Leather")
        table.Rows.Add("Soap")
        table.Rows.Add("Brush")
        table.Rows.Add("Comb")
        table.Rows.Add("Wires")
        table.Rows.Add("Pins")
        table.Rows.Add("And Many More")

        ' Create a new Excel workbook and set the format to XLS
        Dim dt As WorkBook = WorkBook.Create(ExcelFileFormat.XLS)

        ' Select the default worksheet
        Dim dc As WorkSheet = dt.DefaultWorkSheet

        ' Iterate through DataTable rows and populate the Excel worksheet
        Dim rowCount As Integer = 1
        For Each row As DataRow In table.Rows
            dc("A" & (rowCount)).Value = row(0).ToString()
            rowCount += 1
        Next row

        ' Save the workbook as "sample.xls"
        dt.SaveAs("sample.xls")
    End Sub
End Module

Imports IronXL
Imports System
Imports System.Data

Module Program
    Sub Main(args As String())
        ' Create a new DataTable
        Dim table As New DataTable()

        ' Add a column to the DataTable
        table.Columns.Add("DataSet_Daily_Household", GetType(String))

        ' Add rows to the DataTable
        table.Rows.Add("Glass")
        table.Rows.Add("Plates")
        table.Rows.Add("Match Sticks")
        table.Rows.Add("Leather")
        table.Rows.Add("Soap")
        table.Rows.Add("Brush")
        table.Rows.Add("Comb")
        table.Rows.Add("Wires")
        table.Rows.Add("Pins")
        table.Rows.Add("And Many More")

        ' Create a new Excel workbook and set the format to XLS
        Dim dt As WorkBook = WorkBook.Create(ExcelFileFormat.XLS)

        ' Select the default worksheet
        Dim dc As WorkSheet = dt.DefaultWorkSheet

        ' Iterate through DataTable rows and populate the Excel worksheet
        Dim rowCount As Integer = 1
        For Each row As DataRow In table.Rows
            dc("A" & (rowCount)).Value = row(0).ToString()
            rowCount += 1
        Next row

        ' Save the workbook as "sample.xls"
        dt.SaveAs("sample.xls")
    End Sub
End Module

dt.SaveAs("sample.xls")

dt.SaveAs("sample.xls")

dt.SaveAs("sample.xlsx")

dt.SaveAs("sample.xlsx")

dt.SaveAs("sample.xls")

dt.SaveAs("sample.xls")

dt.SaveAsCsv("sample.csv")

dt.SaveAsCsv("sample.csv")

6. Conclusion

Exporting a DataTable to an Excel file in VB.NET is a common requirement in data processing and analysis. The IronXL library provides developers with a powerful tool to facilitate the creation, reading, and manipulation of Excel files in VB.NET applications, including the ability to export DataTables to Excel files. By exporting DataTables to Excel files, users can leverage the powerful features provided by Excel, such as charts, graphs, and pivot tables, to present data in a visually appealing and organized manner. To use IronXL, you need to ensure that you have met the prerequisites, such as having Visual Studio and the .NET Framework installed and installing the IronXL library. Finally, this tutorial demonstrated how to export DataTables to Excel files in both XLS and CSV file formats using IronXL.

To learn more about exporting DataTables to Excel files using IronXL, please visit this provided tutorial.

Furthermore, users can utilize Iron Suite, a bundle of five high-quality ASP.NET Core libraries that include IronXL, IronPDF, and other components.