我有一个DataGrid和两个按钮，分别为添加和删除，代码如下：
  Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Try
            Dim insertcmd As String
            insertcmd = "insert into ejlm values ('" & GetSqlStr(ComboBox1.Text).Trim & "','" & GetSqlStr(TextBox1.Text).Trim & "','" & GetSqlStr(TextBox2.Text).Trim & "')"
            Dim conn As SqlConnection, cmd As SqlCommand
            conn = New SqlConnection(connstr)
            conn.Open()
            cmd = New SqlCommand(insertcmd, conn)
            cmd.ExecuteNonQuery()
            conn.Close()
  [color=FF0000] Me.SqlDataAdapter2.Fill(DataSet71.Tables(1)[/color]         Catch ex As Exception
            MessageBox.Show(ex.Message)
        End Try
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        Try
            Dim delcmd As String
            delcmd = "delete from ejlm where ejlm='" & GetSqlStr(TextBox2.Text) & "'"
            Dim conn As SqlConnection, cmd As SqlCommand
            conn = New SqlConnection(connstr)
            conn.Open()
            cmd = New SqlCommand(delcmd, conn)
            cmd.ExecuteNonQuery()
            conn.Close()
  [color=FF0000] Me.SqlDataAdapter2.Fill(DataSet71.Tables(1)[/color]        Catch ex As Exception
            MessageBox.Show(ex.Message)
        End Try
    End Sub

现在很奇怪的就是，在添加中，红字部分对DataGrid的重新填充有效，而删除中就没效了。大家帮我来找找原因，或者提出个解决办法也行。我希望执行删除后，DataGrid中显示的数据是最新的。谢谢了~~~~~~~~~~~~~~~~~~~~~`