如何在DataGridView中禁用或隐藏按钮

Question

嗨，我想隐藏或禁用我第三列中的按钮，我打算每次单击它时添加行。乱七八糟的是，以前的按钮是活动的，可以添加行。我怎样才能把按钮放在最后一行？

这是我的工作代码：

Private Sub dgAppliances_CellContentClick(sender As Object, e As DataGridViewCellEventArgs) Handles dgAppliances.CellContentClick 
    If e.ColumnIndex <> 2 Then 
     Exit Sub 
    Else 
     If Me.dgAppliances.RowCount - 1 = 20 Then 
      MsgBox("Maximum of 20 appliances only.") 
     Else 
      Me.dgAppliances.Rows.Add() 
     End If 
    End If 
End Sub 

但是，当我加入了一些代码：

Private Sub dgAppliances_CellContentClick(sender As Object, e As DataGridViewCellEventArgs) Handles dgAppliances.CellContentClick 
    If e.ColumnIndex <> 2 Then 
     Exit Sub 
    Else 
     If Me.dgAppliances.RowCount - 1 = 20 Then 
      MsgBox("Maximum of 20 appliances only.") 
     Else 
      Me.dgAppliances.Rows.Add() 
      Dim cell As DataGridViewButtonCell = dgAppliances.Rows(0).Cells(2) 
      cell.Value = String.Empty 
      cell = New DataGridViewColumn() 
      cell.ReadOnly = True 
     End If 
    End If 
End Sub 

此行电池=新的DataGridViewColumn（）有错误。

它说'System.Windows.Forms.DataGridViewColumn'不能转换为'System.Windows.Forms.DataGridViewButtonCell'。

任何人都可以帮助我吗？ TIA。

Here's the sample image.

Answer 1

你试图分配一个DataGridViewColumn成DataGridViewButtonCell - 整个列到一个细胞。

也许你的意图是：cell = New DataGridViewTextBoxCell()？但即便如此，如果你只在最后一排

试图

地方的按钮，然后你会碰上Adding Different DataGridView Cell Types to a Column问题。你可以做如下转换：

Me.dataGridView1.ColumnCount = 3 
Me.dataGridView1.AllowUserToAddRows = False 
Me.dataGridView1.AllowUserToDeleteRows = False 
Me.dataGridView1.RowCount = 1 
Me.dataGridView1(2, 0) = New DataGridViewButtonCell() 

Private Sub DataGridView1_CellContentClick(sender As Object, e As DataGridViewCellEventArgs) Handles dataGridView1.CellContentClick 
    If TypeOf Me.dataGridView1(e.ColumnIndex, e.RowIndex) Is DataGridViewButtonCell Then 
     If Me.dataGridView1.RowCount - 1 = 20 Then 
      MessageBox.Show("Maximum of 20 appliances only.") 
     Else 
      Me.dataGridView1.Rows.Add() 
      Me.dataGridView1(e.ColumnIndex, e.RowIndex) = New DataGridViewTextBoxCell() 
      Me.dataGridView1(e.ColumnIndex, e.RowIndex).[ReadOnly] = True 
      Me.dataGridView1(e.ColumnIndex, Me.dataGridView1.RowCount - 1) = New DataGridViewButtonCell() 
     End If 
    End If 
End Sub