Question

可能这个问题对你来说并不重要，但我在这方面遇到了问题。我有一个DataGridView，我在其中添加行

If Me.Dgv.Rows.Count = 0 Then
    SlNo = 1
Else
    SlNo = Me.Dgv.Rows.Count + 1
End If

Me.Dgv.Rows.Add(SlNo, ItemId, ItemName, Qty, ItemRate, Amt)

并且行显示为......

-----------------------------------------------------------------
|  Sl No  |  Item Id  |  Item Name  |  Qty  |  Rate  |  Amount  |
-----------------------------------------------------------------
|    1    |     6     |  Item6      |  10   |  100.00|   1000.00|
-----------------------------------------------------------------
|    2    |     8     |  Item8      |  10   |  200.00|   2000.00|
-----------------------------------------------------------------
|    3    |     2     |  Item2      |  10   |  300.00|   3000.00|
-----------------------------------------------------------------
|    4    |     16    |  Item16     |  10   |  400.00|   4000.00|
-----------------------------------------------------------------

现在我要清除Row (Sl No. - 2)，但我想保留下面的序列号。

-----------------------------------------------------------------
|  Sl No  |  Item Id  |  Item Name  |  Qty  |  Rate  |  Amount  |
-----------------------------------------------------------------
|    1    |     6     |  Item6      |  10   |  100.00|   1000.00|
-----------------------------------------------------------------
|    2    |     2     |  Item2      |  10   |  300.00|   3000.00|
-----------------------------------------------------------------
|    3    |     16    |  Item16     |  10   |  400.00|   4000.00|
-----------------------------------------------------------------

或者我想清除Row (Sl No. - 1)并希望保留序列号，如

-----------------------------------------------------------------
|  Sl No  |  Item Id  |  Item Name  |  Qty  |  Rate  |  Amount  |
-----------------------------------------------------------------
|    1    |     8     |  Item8      |  10   |  200.00|   2000.00|
-----------------------------------------------------------------
|    2    |     2     |  Item2      |  10   |  300.00|   3000.00|
-----------------------------------------------------------------
|    3    |     16    |  Item16     |  10   |  400.00|   4000.00|
-----------------------------------------------------------------

这意味着我想删除/清除保留序列号的DataGridView行。

我试过......

    Private Sub DgvAutoSerialNumbering()
    Dim SlNumber As Integer = 0
    If Me.Dgv.Rows.Count = 0 Then
        SlNumber = 1
    ElseIf Me.Dgv.Rows.Count > 0 Then
        For i As Integer = 0 To Me.Dgv.Rows.Count - 1
            SlNumber = Me.Dgv.Rows.Count
            Me.Dgv.CurrentRow.Cells(0).Value = SlNumber
        Next
    End If
End Sub

但未能获得输出。

我怎么能这样做？

提前致谢

Answer 1

我找到了答案。对不起该帖子。

在DataGridView事件中搜索时，我发现了一个事件RowPrePaint，只有三行代码解决了这个问题。

Private Sub Dgv_RowPrePaint(sender As Object, e As System.Windows.Forms.DataGridViewRowPrePaintEventArgs) Handles Dgv.RowPrePaint
    If e.RowIndex >= 0 Then
        Me.Dgv.Rows(e.RowIndex).Cells(0).Value = e.RowIndex + 1
    End If
End Sub

感谢您查看我的帖子，也很遗憾因错过event而浪费您的宝贵时间。

Answer 2

每当DataGridView.RowPrePaint必须重新粉刷时，

datagridview事件都会被提出例如，当您拖动datagridview另一个表单或MessageBox时，就会发生这种情况或当你最小化/隐藏form并再次重新开启时......

在您的情况下，只有在更改了行数后才需要更新Serial No。

'Method looping all rows and update value of `Sl No` column based on index of row
Private Sub Dgv_RowCountChanged()
    For Each dgvr As DataGridViewRow in Me.Dgv.Rows
        dgvr.Cells(0).Value = dgvr.Index + 1
    Next
End Sub

方法Dgv_RowCountChanged将在RowsAdded和RowsRemoved

的事件处理程序中执行

Private Sub Dgv_RowsAdded(object sender, 
                          DataGridViewRowsAddedEventArgs e) Handles Dgv.RowsAdded
    Me.DgvCountChanged()
End Sub

Private Sub Dgv_RowsRemoved(object sender, 
                          DataGridViewRowsRemovedEventArgs e) Handles Dgv.RowsRemoved
    Me.DgvCountChanged()
End Sub

Answer 3

以下是如何创建每行的列索引自动生成序列号：

<Columns>
    <asp:CommandField ButtonType="Image" CancelImageUrl="~/data/commands/cancel.gif"
                      DeleteImageUrl="~/data/commands/delete.gif" DeleteText="Verwijder" EditImageUrl="~/data/commands/edit.gif"
                      EditText="Bewerk" SelectImageUrl="~/data/commands/download.gif" SelectText="Download bestand"
                      ShowDeleteButton="True" ShowEditButton="True" ShowSelectButton="True" UpdateImageUrl="~/data/commands/save.gif"
                      UpdateText="Opslaan">

        <HeaderStyle Width="10%" />

    </asp:CommandField>

    <asp:BoundField HeaderText="Nr." ReadOnly="true">
        <ItemStyle HorizontalAlign="Right" Width="1%" />
    </asp:BoundField>
</Columns>

然后在代码发送上：

protected void gridLidDocument_RowDataBound(object sender, GridViewRowEventArgs e){  
    if (e.Row.RowType.Equals(DataControlRowType.DataRow)){
        e.Row.Cells[1].Text = "" + ((((GridView)sender).PageIndex * ((GridView)sender).PageSize) + (e.Row.RowIndex + 1));
    }
}

VB.NET DataGridView单元序列号重新生成

3 个答案: