Question

我将excel文件导入 GridExtrol DevExpress 我将excel文件导入网格控件时没有问题但是当我添加列时我的 GridControl 然后尝试导入我的excel文件，它会覆盖这些列，

我也尝试过使用 GridView 中的 CustomColumnUnBoundData事件，它似乎有效，并且在添加未绑定列时不会覆盖列但是当Button是单击它会为某些原因命名为 [NAME] 创建两列，并查询行值两次。

示例VB：

Private Sub SimpleButton2_Click(sender As System.Object, e As System.EventArgs) Handles SimpleButton2.Click, GridView1.DataSourceChanged
        OFD.ImportMe(GridControl1, TextEdit1)
        view = GridControl1.MainView
        'Dim Columns As GridColumn
        GridColumn1 = GridView1.Columns.AddField("NAME")
        GridColumn1.VisibleIndex = view.Columns.Count

    End Sub

    Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load

    End Sub

    Private Sub GridView1_CustomUnboundColumnData(sender As Object, e As DevExpress.XtraGrid.Views.Base.CustomColumnDataEventArgs) Handles GridView1.CustomUnboundColumnData
        Dim Fields() As String = {"NAME", "DESCRIPTION", "STOCK", "ORDERED"}

        GridColumn1.VisibleIndex = GridView1.Columns.Count - 1
        For i As Integer = 0 To GridView1.Columns.Count

            If e.Column.FieldName = Fields(0) AndAlso e.IsGetData Then
                e.Value = e.ListSourceRowIndex
            End If
            ' OFD.Listing(e.ListSourceRowIndex)
        Next
    End Sub

我在另一个类中建立了连接：

CLASS VB：

Public Function openMe(ByVal path As TextEdit)

        Dim ofd As New OpenFileDialog
        ofd.Filter = "Excel Files (*.xls)|*.xls|All Files (*.)|*.*"

        If ofd.ShowDialog() = DialogResult.OK Then
            path.Text = ofd.FileName
        End If
        Return 0
    End Function

    Public Function ImportMe(ByVal gc As GridControl, ByVal file As TextEdit)

        Dim Connect As OleDbConnection
        Dim Command As OleDbDataAdapter
        Dim con As String

        con = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + file.Text + ";Extended Properties=Excel 8.0"

        Connect = New OleDbConnection(con)
        Command = New OleDbDataAdapter("Select * from [Sheet1$]", Connect)
        DD = New DataSet()

        Command.Fill(DD)
        gc.DataSource = DD.Tables(0)
        Connect.Close()
        Return DD
    End Function

    Public Function Listing(ByVal sender As Object, ByVal listSource As Integer)
        Dim DR As DataRow = DD.Tables("NAME").Rows(listSource)
        Return DR
    End Function

我为长篇文章道歉我只是不知道是什么触发了这个事件所以我必须彻底解释它。感谢

Answer 1

如果您的网格在设置其数据时没有列，则网格将自动生成GridColumns。您可以将GridView.OptionsBehavior.AutoPopulateColumns设置为false以避免此行为。

使用DevExpress GridControl并导入Excel文件时遇到问题

1 个答案: