DataGridView 导出到 Excel：高效操作与示例

Public Class OutExcel
    Public Function daochu(ByVal x As DataGridView) As Boolean '导出到Excel函数
        Try
            If x.Rows.Count <= 0 Then '判断记录数,如果没有记录就退出
                MessageBox.Show("没有记录可以导出", "没有可以导出的项目", MessageBoxButtons.OK, MessageBoxIcon.Information)
                Return False
            Else '如果有记录就导出到Excel
                Dim xx As Object : Dim yy As Object
                xx = CreateObject("Excel.Application") '创建Excel对象
                yy = xx.workbooks.add()
                Dim i As Integer, u As Integer = 0, v As Integer = 0 '定义循环变量,行列变量
                For i = 1 To x.Columns.Count '把表头写入Excel
                    yy.worksheets(1).cells(1, i) = x.Columns(i - 1).HeaderCell.Value
                Next
                Dim str(x.Rows.Count - 1, x.Columns.Count - 1) '定义一个二维数组
                For u = 1 To x.Rows.Count '行循环
                    For v = 1 To x.Columns.Count '列循环
                        If x.Item(v - 1, u - 1).Value.GetType.ToString <> "System.Guid" Then
                            str(u - 1, v - 1) = x.Item(v - 1, u - 1).Value
                        Else
                            str(u - 1, v - 1) = x.Item(v - 1, u - 1).Value.ToString
                        End If
                    Next
                Next
                yy.worksheets(1).range("A2").Resize(x.Rows.Count, x.Columns.Count).Value = str '把数组一起写入Excel
                yy.worksheets(1).Cells.EntireColumn.AutoFit() '自动调整Excel列
                ' yy.worksheets(1).name = x.TopLeftHeaderCell.Value.ToString '表标题写入作为Excel工作表名称
                xx.visible = True '设置Excel可见
                yy = Nothing '销毁组建释放资源
                xx = Nothing '销毁组建释放资源