将Datagridview中的数据导出至Excel中

    首先添加一个模块ImportToExcel，并添加引用

    然后导入命名空间：

Imports Microsoft.Office.Interop
Imports System.Data.SqlClient

    最后建立一个ImportToExcel的函数，函数代码如下：

    ''' <summary>
    ''' 将Datagridview中的数据导出至Excel中
    ''' </summary>
    ''' <param name="DGV">Datagridview类型</param>
    ''' <returns>布尔值类型，导出是否成功</returns>
    ''' <remarks></remarks>
    Public Function ImportToExcel(ByVal DGV As DataGridView) As Boolean

        '创建Excel
        Dim bln As Boolean
        Dim xlApp, xlBook, xlSheet As Object
        xlApp = CreateObject("Excel.Application")
        xlBook = xlApp.Workbooks.Add
        xlSheet = xlBook.Worksheets(1)

        '打开Sheet1
        Dim rowindex, colindex As Integer
        rowindex = 1                                                    '行
        colindex = 0                                                    '列
        xlSheet = xlApp.Worksheets("sheet1")                            '打开Sheet1那一页

        '将Datagridview的数据添加到DataTable中
        Dim table As New DataTable
        table = DGV.DataSource                                          'Datagridview数据源
        Dim row As DataRow                                              '定义Row为表格的行
        Dim col As DataColumn                                           '定义col为表格的列

        '将Datagridview中的每一列写入Excel中
        For Each col In table.Columns
            colindex = colindex + 1
            xlApp.Cells(1, colindex) = col.ColumnName
        Next

        '将Datagridview中的每一行写入Excel中
        For Each row In table.Rows
            rowindex = rowindex + 1
            colindex = 0
            For Each col In table.Columns
                colindex = colindex + 1
                xlApp.Cells(rowindex, colindex) = row(col.ColumnName)
            Next
        Next
        xlApp.Visible = True

        Return bln

    End Function

   
    调用方法

    Private Sub btnExportExcel_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnExportExcel.Click

        '不允许导出空数据
        If DataGridView1.DataSource = "" Then
            MsgBox("记录为空，请重新查询！", vbOKOnly + vbInformation, "系统提示")
            txtCardID.Clear()
            txtCardID.Focus()
        Else
            Call ImportToExcel.ImportToExcel(DataGridView1)
        End If

    End Sub

    实现效果如下：