0

我有一个填充数据表的 SQL Server 数据库,该数据表是 datagridview 控件的数据源。我想隐藏 datagridview 控件中以字符串开头的所有列:

strColumnName = "Checkpoint " & intCheckpointNumber

我怎样才能做到这一点?我正在使用 VB2010。

我结束的地方,显然不起作用的是以下内容:

Do While intCheckpoint < intTotalCheckPoints
    If Me.datagridview.Columns ' I cannot figure out how to insert something along the lines of Name.StartsWith(strColumnName)' Then 
        'Hide this column with something along the lines of 'Me.datagridview.Columns(strColumnName).Visible = False
    End If
    intCheckPoint += 1
Loop

我不知道如何根据它们的名称开头隐藏列。

谢谢

好的,我已经修改了我的代码,结果如下:

Try
    Do    
        If m_DataTable.Columns.Contains("Checkpoint " & intCheckPointNumber & " Time") Then    

            Dim tabNewCheckpoint As New TabPage
            Dim dgvNewCheckpoint As New DataGridView

            tabNewCheckpoint.Name = "tabCheckpoint" & intCheckPointNumber
            tabNewCheckpoint.Text = "Checkpoint " & intCheckPointNumber
            tabctrlTimingTable.TabPages.Add(tabNewCheckpoint)

            dgvNewCheckpoint.Name = "dgvCheckpoint" & intCheckPointNumber
            dgvNewCheckpoint.DataSource = m_DataTable
            dgvNewCheckpoint.Size = dgvTimingP2P.Size
            tabNewCheckpoint.Controls.Add(dgvNewCheckpoint)

            strColumnName = "Checkpoint " & intCheckPointNumber
            For Each col As DataGridViewColumn In dgvNewCheckpoint.Columns
                MessageBox.Show(col.Name)
                If col.Name.StartsWith("Checkpoint") Then
                    If Not col.Name.StartsWith(strColumnName) Then
                        col.Visible = False
                    End If
                End If
            Next
        Else
            Exit Do
        End If
        intCheckPointNumber += 1
    Loop
Catch ex As Exception
    'MessageBox.Show(ErrorToString)
End Try

我现在遇到的问题是这些列仍然没有隐藏。如果我在程序中插入停止,我可以看到代码甚至没有处理 For...Next 循环。什么会导致这个?

谢谢

好的,现在我已经改变了:

For Each col As DataGridViewColumn In dgvNewCheckpoint.Columns
    MessageBox.Show(col.Name)
    If col.Name.StartsWith("Checkpoint") Then
        If Not col.Name.StartsWith(strColumnName) Then
            col.Visible = False
        End If
    End If
Next

至:

For Each col As DataColumn In m_DataTable.Columns
    MessageBox.Show(col.ColumnName)
    If col.ColumnName.StartsWith("Checkpoint") Then
        If Not col.ColumnName.StartsWith(strColumnName) Then
            dgvNewCheckpoint.Columns(col.ColumnName).Visible = False
        End If
    End If
Next

它给了我一个错误:“对象引用未设置为对象的实例”,但 datagridview 列与数据表列具有相同的名称,所以我看不出这是怎么可能的。有任何想法吗?

4

2 回答 2

1

移动线路:

tabNewCheckpoint.Controls.Add(dgvNewCheckpoint)

紧随其后:

tabctrlTimingTable.TabPages.Add(tabNewCheckpoint)

解决了这个问题。

于 2012-12-07T00:32:12.817 回答
0

假设您知道如何隐藏 DataGridView 中的列,我会使用StartsWith()

于 2012-12-06T19:11:46.697 回答