Question

我试图通过datagridview删除我的数据库中的记录，只需按下删除键，但它给我错误“索引超出范围。必须是非负数且小于集合的大小。”。这是我的代码

Private Sub DataGridView1_UserDeletedRow(sender As Object, e As DataGridViewRowEventArgs) Handles DataGridView1.UserDeletedRow

    For i = 0 To DataGridView1.Rows.Count - 1

        Dim deleterows As Integer = DataGridView1.SelectedRows(i).Cells(0).Value
        Dim sqlquery As String = "delete from tblname where ID = " & deleterows & ";"
        Dim sqlcommand As New OleDbCommand

        With sqlcommand
            .CommandText = sqlquery
            .Connection = conn
            .ExecuteNonQuery()
        End With

    Next

End Sub

Answer 1

我想知道问题出在“DataGridView1.Rows.Count - 1” 它可能没有执行-1计算...

尝试（DataGridView1.Rows.Count - 1）

Answer 2

如果您想使用循环来删除行，请尝试向后移动您的行（即从最后一行开始并继续前进，而不是从前面开始并向前进行）。

对于您所描述的内容，将循环放在一起（使用您自己的代码）可能会更好：

 Dim deleterows As Integer = DataGridView1.SelectedRows(i).Cells(0).Value
 Dim sqlquery As String = "delete from tblname where ID = " & deleterows & ";"
 Dim sqlcommand As New OleDbCommand

 With sqlcommand
     .CommandText = sqlquery
     .Connection = conn
     .ExecuteNonQuery()
 End With

在gridview中使用vb.net无按钮删除

2 个答案: