我有一个SQL Server数据库,用于填充数据表,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
我该怎么做?我正在使用VB2010。
我结束的地方显然不起作用如下:
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
我无法弄清楚如何根据列名开头隐藏列。
由于
好的,我修改了我的代码,最后得到了以下内容:
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列仍未隐藏。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。会导致这种情况的原因是什么?
由于
好的,现在我改变了:
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
要:
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:“对象引用没有设置为对象的实例”,但datagridview列与datatable列的名称相同,所以我看不出这是怎么回事。有什么想法吗?
答案 0 :(得分:1)
移动线:
tabNewCheckpoint.Controls.Add(dgvNewCheckpoint)
紧接下方:
tabctrlTimingTable.TabPages.Add(tabNewCheckpoint)
解决了这个问题。
答案 1 :(得分:0)
假设您知道如何隐藏DataGridView中的列,我会使用StartsWith()。