[VB.NET]VB.net中winForm的dataGrid如何只能选择单行

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VB.net中winForm的dataGrid如何只能选择单行
VB.net中winForm的dataGrid如何只能选择单行
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VB.net中winForm的dataGrid如何只能选择单行
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将multiSelect属性设置为false
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我是.net2003,datagrid中没有multiSelect这个属性啊
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看这个，继承的DataGrid，只选中一行呵呵。这是C#的，你可以改写成VB的，或者写到类中，调用。

How can I make my DataGrid support a single select mode, and not the default multiselect mode?

One way to do this is to derive a DataGrid, override its OnMouseDown and OnMouseMove methods. In the OnMouseDown, handle selecting and unselecting in your code without calling the base class if the click is on the header. In the OnMouseMove, don t call the baseclass to avoid dragging selections. Below is a code snippet for a sample derived DataGrid. You can download a full project (C#, VB).

public class MyDataGrid : DataGrid

{

private int oldSelectedRow = -1;

protected override void OnMouseMove(System.Windows.Forms.MouseEventArgs e)

{

//don t call the base class if left mouse down

if(e.Button != MouseButtons.Left)

base.OnMouseMove(e);

}

protected override void OnMouseDown(System.Windows.Forms.MouseEventArgs e)

{

//don t call the base class if in header

DataGrid.HitTestInfo hti = this.HitTest(new Point(e.X, e.Y));

if(hti.Type == DataGrid.HitTestType.Cell)

{

if(oldSelectedRow > -1)

this.UnSelect(oldSelectedRow);

oldSelectedRow = -1;

base.OnMouseDown(e);

}

else if(hti.Type == DataGrid.HitTestType.RowHeader)

{

if(oldSelectedRow > -1)

this.UnSelect(oldSelectedRow);

if((Control.ModifierKeys & Keys.Shift) == 0)

base.OnMouseDown(e);

else

this.CurrentCell = new DataGridCell(hti.Row, hti.Column);

this.Select(hti.Row);

oldSelectedRow = hti.Row;

}

}

}
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VB版，写到一个类文件中就能用了。

Option Strict Off
Option Explicit On

Imports Microsoft.VisualBasic
Imports System
Imports System.Drawing
Imports System.Windows.Forms

Public Class MyDataGrid
Inherits DataGrid
Private oldSelectedRow As Integer
Fields
Constructors
Events
Methods
Public Sub New()
Warning: Implementation not found
End Sub
Protected Overloads Overrides Sub OnMouseMove(ByVal e As MouseEventArgs)

don t call the base class if left mouse down
If (e.Button <> Windows.Forms.MouseButtons.Left) Then
MyBase.OnMouseMove(e)
End If

End Sub
Protected Overloads Overrides Sub OnMouseDown(ByVal e As MouseEventArgs)

don t call the base class if in header
Dim hti As DataGrid.HitTestInfo
hti = Me.HitTest(New Point(e.X, e.Y))
If (hti.Type = DataGrid.HitTestType.Cell) Then
If (oldSelectedRow > -(1)) Then
Me.UnSelect(oldSelectedRow)
End If
oldSelectedRow = -(1)
MyBase.OnMouseDown(e)
Else
If (hti.Type = DataGrid.HitTestType.RowHeader) Then
If (oldSelectedRow > -(1)) Then
Me.UnSelect(oldSelectedRow)
End If
If ((Control.ModifierKeys And Keys.Shift) _
= 0) Then
MyBase.OnMouseDown(e)
Else
Me.CurrentCell = New DataGridCell(hti.Row, hti.Column)
End If
Me.Select(hti.Row)
oldSelectedRow = hti.Row
End If
End If

End Sub
End Class
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在程序中手动设置就可以了，我以前也遇到过！
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