如何：更改光标类型
更新：2007 年 11 月
本示例演示如何针对特定元素和应用程序更改鼠标指针的 Cursor。
本示例包括一个可扩展应用程序标记语言 (XAML) 文件和一个代码隐藏文件。有关完整示例，请参见更改光标类型示例。
示例
创建用户界面，它包含一个用于选择所需的 Cursor 的 ComboBox、一对用于确定光标更改是仅应用于单个元素还是应用于整个应用程序的 RadioButton 对象以及一个 Border（新光标将应用于的元素）。
<StackPanel>
<Border Width="300">
<StackPanel Orientation="Horizontal"
HorizontalAlignment="Center">
<StackPanel Margin="10">
<Label HorizontalAlignment="Left">Cursor Type</Label>
<ComboBox Width="100"
SelectionChanged="CursorTypeChanged"
HorizontalAlignment="Left"
Name="CursorSelector">
<ComboBoxItem Content="AppStarting" />
<ComboBoxItem Content="ArrowCD" />
<ComboBoxItem Content="Arrow" />
<ComboBoxItem Content="Cross" />
<ComboBoxItem Content="HandCursor" />
<ComboBoxItem Content="Help" />
<ComboBoxItem Content="IBeam" />
<ComboBoxItem Content="No" />
<ComboBoxItem Content="None" />
<ComboBoxItem Content="Pen" />
<ComboBoxItem Content="ScrollSE" />
<ComboBoxItem Content="ScrollWE" />
<ComboBoxItem Content="SizeAll" />
<ComboBoxItem Content="SizeNESW" />
<ComboBoxItem Content="SizeNS" />
<ComboBoxItem Content="SizeNWSE" />
<ComboBoxItem Content="SizeWE" />
<ComboBoxItem Content="UpArrow" />
<ComboBoxItem Content="WaitCursor" />
<ComboBoxItem Content="Custom" />
</ComboBox>
</StackPanel>
<!-- The user can select different cursor types using this ComboBox -->
<StackPanel Margin="10">
<Label HorizontalAlignment="Left">Scope of Cursor</Label>
<StackPanel>
<RadioButton Name="rbScopeElement" IsChecked="True"
Checked="CursorScopeSelected">Display Area Only</RadioButton>
<RadioButton Name="rbScopeApplication"
Checked="CursorScopeSelected">Entire Appliation</RadioButton>
</StackPanel>
</StackPanel>
</StackPanel>
</Border>
<!-- When the mouse pointer is over this Border -->
<!-- the selected cursor type is shown -->
<Border Name="DisplayArea" Height="250" Width="400"
Margin="20" Background="AliceBlue">
<Label HorizontalAlignment="Center">
Move Mouse Pointer Over This Area
</Label>
</Border>
</StackPanel>
下面的代码隐藏创建一个 SelectionChanged 事件处理程序，当 ComboBox 中的光标类型发生变化时，将调用该处理程序。 switch 语句用于筛选光标名称，并设置名为 DisplayArea 的 Border 上的 Cursor 属性。
如果光标更改设置为“Entire Application”（整个应用程序），则 OverrideCursor 属性将设置为 Border 控件的 Cursor 属性。 这会强制为整个应用程序更改光标。
完整示例更改光标类型示例还演示了如何创建自定义光标类型。
' When the Radiobox changes, a new cursor type is set
Private Sub CursorTypeChanged(ByVal sender As Object, ByVal e As SelectionChangedEventArgs)
Dim item As String = CType(e.Source, ComboBox).SelectedItem.Content.ToString()
Select Case item
Case "AppStarting"
DisplayArea.Cursor = Cursors.AppStarting
Case "ArrowCD"
DisplayArea.Cursor = Cursors.ArrowCD
Case "Arrow"
DisplayArea.Cursor = Cursors.Arrow
Case "Cross"
DisplayArea.Cursor = Cursors.Cross
Case "HandCursor"
DisplayArea.Cursor = Cursors.Hand
Case "Help"
DisplayArea.Cursor = Cursors.Help
Case "IBeam"
DisplayArea.Cursor = Cursors.IBeam
Case "No"
DisplayArea.Cursor = Cursors.No
Case "None"
DisplayArea.Cursor = Cursors.None
Case "Pen"
DisplayArea.Cursor = Cursors.Pen
Case "ScrollSE"
DisplayArea.Cursor = Cursors.ScrollSE
Case "ScrollWE"
DisplayArea.Cursor = Cursors.ScrollWE
Case "SizeAll"
DisplayArea.Cursor = Cursors.SizeAll
Case "SizeNESW"
DisplayArea.Cursor = Cursors.SizeNESW
Case "SizeNS"
DisplayArea.Cursor = Cursors.SizeNS
Case "SizeNWSE"
DisplayArea.Cursor = Cursors.SizeNWSE
Case "SizeWE"
DisplayArea.Cursor = Cursors.SizeWE
Case "UpArrow"
DisplayArea.Cursor = Cursors.UpArrow
Case "WaitCursor"
DisplayArea.Cursor = Cursors.Wait
Case "Custom"
DisplayArea.Cursor = CustomCursor
End Select
' if the cursor scope is set to the entire application
' use OverrideCursor to force the cursor for all elements
If (cursorScopeElementOnly = False) Then
Mouse.OverrideCursor = DisplayArea.Cursor
End If
End Sub
private void CursorTypeChanged(object sender, SelectionChangedEventArgs e)
{
ComboBox source = e.Source as ComboBox;
if (source != null)
{
ComboBoxItem selectedCursor = source.SelectedItem as ComboBoxItem;
// Changing the cursor of the Border control
// by setting the Cursor property
switch (selectedCursor.Content.ToString())
{
case "AppStarting":
DisplayArea.Cursor = Cursors.AppStarting;
break;
case "ArrowCD":
DisplayArea.Cursor = Cursors.ArrowCD;
break;
case "Arrow":
DisplayArea.Cursor = Cursors.Arrow;
break;
case "Cross":
DisplayArea.Cursor = Cursors.Cross;
break;
case "HandCursor":
DisplayArea.Cursor = Cursors.Hand;
break;
case "Help":
DisplayArea.Cursor = Cursors.Help;
break;
case "IBeam":
DisplayArea.Cursor = Cursors.IBeam;
break;
case "No":
DisplayArea.Cursor = Cursors.No;
break;
case "None":
DisplayArea.Cursor = Cursors.None;
break;
case "Pen":
DisplayArea.Cursor = Cursors.Pen;
break;
case "ScrollSE":
DisplayArea.Cursor = Cursors.ScrollSE;
break;
case "ScrollWE":
DisplayArea.Cursor = Cursors.ScrollWE;
break;
case "SizeAll":
DisplayArea.Cursor = Cursors.SizeAll;
break;
case "SizeNESW":
DisplayArea.Cursor = Cursors.SizeNESW;
break;
case "SizeNS":
DisplayArea.Cursor = Cursors.SizeNS;
break;
case "SizeNWSE":
DisplayArea.Cursor = Cursors.SizeNWSE;
break;
case "SizeWE":
DisplayArea.Cursor = Cursors.SizeWE;
break;
case "UpArrow":
DisplayArea.Cursor = Cursors.UpArrow;
break;
case "WaitCursor":
DisplayArea.Cursor = Cursors.Wait;
break;
case "Custom":
DisplayArea.Cursor = CustomCursor;
break;
default:
break;
}
// If the cursor scope is set to the entire application
// Use OverrideCursor to force the cursor for all elements
if (cursorScopeElementOnly == false)
{
Mouse.OverrideCursor = DisplayArea.Cursor;
}
}
}