如何在VB.NET中的datagrid中使用快捷键 [英] How do I use shortcut key in datagrid in VB.NET

问题描述

Hello Everyone，我是VB.net的新手。暂时不知道OOPS概念。



我有一个有3列的网格，我想在按某个特定键时将相同列的前一行数据粘贴到当前单元格上（例如： - F1）

参见网格



在Above网格中，第一行marks列的值为Test，当我按F1（第二行中的光标）时，我想将Test粘贴到第二行（'marks'列单元格）



实施原因因为我需要在网格行上粘贴重复的相同数据





我尝试下面的代码工作，但我不确定哪个是正确的方式



我复制了

Hello Everyone, I am very new to VB.net & don't know OOPS Concept Clearly.

I have a grid that has 3 columns, I want to Paste same column's previous row data on current cell when pressing some specific key(for ex:- F1)
See Grid Here

In the Above grid, First row "marks" column has value "Test", When I pressing F1(cursor in second row) I want to Paste "Test" to the second row('marks' column cell)

Reason to Implement because I need to Paste repeated same data on grid row


I tried below code its working but I am not sure which is right way

I copied

Protected Overrides Function ProcessCmdKey(ByRef msg As Message, ByVal keyData As Keys) As Boolean

来自 Stackoverflow



请解释上面的功能（保护和覆盖的含义及其参数），我正在使用正确或错误的单元格点击事件



我声明

From Stackoverflow

Please Explain above function(meaning of protected and override and its arguments) and I am using cell click event which is right or wrong

I Declared

Dim keyData, msg

但它显示警告消息

But It shows warning message

"Variable 'msg' passed by reference before it has assigned a value. A null reference exception could result at run time"

和

and

"variable 'keydata' is used before it has assigned a value. A null reference exception could result at run time"

我尝试过：

What I have tried:

Private Sub DataGridView1_CellClick(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles DataGridView1.CellClick
      Dim keyData, msg
      Select Case DataGridView1.CurrentCell.ColumnIndex
          Case gcol.marks
              ProcessCmdKey(msg, keyData)
      End Select
  End Sub
  Protected Overrides Function ProcessCmdKey(ByRef msg As Message, ByVal keyData As Keys) As Boolean
      Select Case keyData
          Case Keys.F1
              Select Case Me.DataGridView1.CurrentCell.ColumnIndex
                  Case gcol.marks
                      Dim row = Me.DataGridView1.CurrentCell.RowIndex
                      With Me.DataGridView1
                          Dim tobepaste = .Item(gcol.marks, row - 1).Value
                          .CurrentCell.Value = tobepaste
                      End With
              End Select
              Return True
      End Select
      Return MyBase.ProcessCmdKey(msg, keyData)
  End Function

推荐答案

Protected Overrides Function ProcessCmdKey(ByRef msg As Message, ByVal keyData As Keys) As Boolean

覆盖默认功能

System.Windows.Forms.Form



覆盖此函数意味着Form可以响应KeyPress事件



只需在此之后使用任何键组合来操作与Form相关的数据

It overrides Default Function
System.Windows.Forms.Form

overriding this function means Form can respond on KeyPress Event

simply you can use after this any key combinations to manipulate data which is associated with Form

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