在vb.net中使用OLEDB从Excel导入到datagridview

Question

我正在使用下面的代码将Excel工作表导入datagridview。如果Datagridview中没有预定义的列没有问题，但是当我导入文件时我有预定义的列，它会创建新的列。怎么可能防止这种情况。

Public Shared Sub NewMethod2(ByVal dgv As DataGridView)
    Dim filepath As String
    Dim ofd As OpenFileDialog = New OpenFileDialog With {
        .Filter = "Excel Files | *.xlsx",
        .Title = "Import Model Info Sheet"
    }
    Try
        If ofd.ShowDialog() = DialogResult.OK Then
            filepath = Path.GetFullPath(ofd.FileName)
            Globals.ModelInfoSheet = filepath
        End If
        frmMain.Label1.Text = Globals.ModelInfoSheet
        dgv.DataSource = Nothing
        Dim MyConnection As OleDb.OleDbConnection
        Dim MyCommand As OleDb.OleDbDataAdapter
        MyConnection = New OleDb.OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source='" & Globals.ModelInfoSheet & "';Extended Properties=Excel 12.0;")
        MyCommand = New OleDb.OleDbDataAdapter("select * from [Sheet1$]", MyConnection)
        MyCommand.TableMappings.Add("srcTablePa", "setTablePa")
        Dim DtSet As DataTable
        DtSet = New DataTable
        MyCommand.Fill(DtSet)
        dgv.DataSource = DtSet

        MyConnection.Close()

        MessageBox.Show("File successfully imported")

    Catch ex As Exception
        MsgBox(ex.Message)
    End Try
End Sub

Answer 1

你能尝试一下吗（在Try ... Catch之间）？

Imports System.Data.SqlClient
Public Class Form1
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

        Dim MyConnection As System.Data.OleDb.OleDbConnection
        Dim DtSet As System.Data.DataSet
        Dim MyCommand As System.Data.OleDb.OleDbDataAdapter
        MyConnection = New System.Data.OleDb.OleDbConnection("provider=Microsoft.Jet.OLEDB.4.0;Data Source='c:\vb.net-informations.xls';Extended Properties=Excel 8.0;")
        MyCommand = New System.Data.OleDb.OleDbDataAdapter("select * from [Sheet1$]", MyConnection)
        MyCommand.TableMappings.Add("Table", "Net-informations.com")
        DtSet = New System.Data.DataSet
        MyCommand.Fill(DtSet)
        DataGridView1.DataSource = DtSet.Tables(0)
        MyConnection.Close()

    End Sub
End Class