如何在VB.NET中忽略MouseClick事件 [英] How to ignore MouseClick Event in VB.NET

问题描述

嗨朋友们，



我项目中的datagridview中有DataGridViewCheckBoxColumn单元格。



我想要用户可以在满足条件时单击它来检查DataGridViewCheckBoxColumn。



当条件不满足时，我希望DataGridViewCheckBoxColumn忽略MouseClick_event。 />


我不知道我必须在MouseClick_event处理程序中放置代码来实现这个目标。



任何帮助非常感谢。





提前致谢





从下面的评论中复制的其他信息

我以为会有类似于Key.Press_Event中的e.Handled。



为了清楚起见，我已经包含了我的代码

Hi friends,

I have DataGridViewCheckBoxColumn cell in datagridview in my project.

I want the user to be able check DataGridViewCheckBoxColumn by clicking it when certain a condition is met.

When the condition is not met I expect the DataGridViewCheckBoxColumn to ignore the MouseClick_event.

I do not know the code I must place in the MouseClick_event handler to achieve this objective.

Any assistance would greatly appreciated.


Thanks in advance


Additional information copied from comment below
I thought there will be something like e.Handled as in KeyPress_Event.

For the purpose of clarity I have included my code

If DataGridView1.CurrentCell.ColumnIndex = 9 Then
  'EventArgs.Empty = True
  Select Case e.Button
    Case (Windows.Forms.MouseButtons.Left) Or (Windows.Forms.MouseButtons.None) Or (Windows.Forms.MouseButtons.Middle)
    MessageBox.Show("Editing this column is not allowed for this transaction", Application.ProductName, MessageBoxButtons.OK, MessageBoxIcon.Error)
    'EventArgs = Empty

    Case Windows.Forms.MouseButtons.Middle
    Case Windows.Forms.MouseButtons.Right
    Case Else
  End Select
End If

推荐答案

对于你所描述的，最简单的方法是

For what you describe, the easiest way would be

if condition != TRUE
  return

//here the rest of the code out of the if

$ / b $ b或

or

if condition == TRUE
{
  //your code here
}
else
  return

如果这不符合您的要求要做...请使用改进问题小部件并更详细地解释







OP的最后一条评论，其中为其他人添加了自制的解决方法

非常感谢。我找到了解决问题的方法。我只是在不满足条件时执行代码（消息框并使单元格成为只读）。完整例程如下所示：

If that doesn't fit what you want to do... please use the "improve question" widget and explain it more detailed



OP's last comment with self-made workaround added here for other people
Thanks so much. I have found a handle to my problem. I just put the code(messagebox and making the cell readonly)to execute when the condition is not met. Complete routine is shown below:

Private Sub DataGridView1_MouseClick(sender As Object, e As System.Windows.Forms.MouseEventArgs) Handles DataGridView1.MouseClick
  If (DataGridView1.CurrentCell.ColumnIndex = 12) Then
    If (DataGridView1.CurrentRow.Cells("TransType").FormattedValue.ToString.ToUpper <> "E") AndAlso (DataGridView1.CurrentRow.Cells("TransType").FormattedValue.ToString.ToUpper <> "D") Then
      'EventArgs.Empty = True
      Select Case e.Button
        Case Windows.Forms.MouseButtons.Left
          DataGridView1.CurrentCell.ReadOnly = True
          MessageBox.Show("Editing this column is not allowed for this transaction", Application.ProductName, MessageBoxButtons.OK, MessageBoxIcon.Error)
          'EventArgs = Empty
        Case Windows.Forms.MouseButtons.Middle
          DataGridView1.CurrentCell.ReadOnly = True
          MessageBox.Show("Editing this column is not allowed for this transaction", Application.ProductName, MessageBoxButtons.OK, MessageBoxIcon.Error)
          'EventArgs = Empty
        Case Windows.Forms.MouseButtons.Right
          DataGridView1.CurrentCell.ReadOnly = True
          MessageBox.Show("Editing this column is not allowed for this transaction", Application.ProductName, MessageBoxButtons.OK, MessageBoxIcon.Error)
          'EventArgs = Empty 
        Case Else
          DataGridView1.CurrentCell.ReadOnly = False
      End Select
    Else
      DataGridView1.CurrentCell.ReadOnly = False
    End If
  End If
End Sub

非常感谢非常适合您的帮助

Thanks so much for your assistance

这篇关于如何在VB.NET中忽略MouseClick事件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！