Question

例如我有＆＃34; NID＆＃34;作为带有@NID字段的文本框和数据网格我想要保存NID值和＃34; N001＆＃34;到datagrid上的@NID 如何在保存NID时使用值＆＃34; N001＆＃34;到datagrid。

我尝试这样但错误

private sub save() dim dgv as datagridview1 if dgv.CurrentRow.Cells(0).value = NID.text then msgbox("Data duplicate") else dgv.rows.insert(.NewRowIndex, NID.text) end if end sub

帮助我感谢

Answer 1

在您的代码中，您只检查DataGridView的当前行。您需要检查所有行。

'For loops are inclusive, meaning that both indexes will be reached.
'dgv.Rows is a zero indexed collection so "dgv.Rows(dgv.RowCount)" would give an error
For i = 0 To dgv.RowCount - 1 

    If dgv.Rows(i).Cells(0).Value = NID.Text
        MsgBox("Duplicate data")
        Exit Sub 'So no insert occurs
    End If

Next
'code to insert row

如何验证datagridview上的数据以防止重复

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