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Gör så här: Ändra markörtyp

Det här exemplet visar hur du ändrar muspekarens Cursor för ett visst element och för programmet.

Det här exemplet består av en XAML-fil (Extensible Application Markup Language) och en kod bakom filen.

Exempel

Användargränssnittet skapas, som består av en ComboBox för att välja önskad Cursor, ett par RadioButton objekt för att avgöra om markörens ändring endast gäller för ett enda element eller gäller för hela programmet och en Border som är elementet som den nya markören tillämpas på.

<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>

Följande kod bakom skapar en SelectionChanged händelsehanterare som anropas när markörens typ ändras i ComboBox. En switch-instruktion filtrerar på markörens namn och anger egenskapen Cursor på den Border som heter DisplayArea.

Om markören ändras till "Hela programmet" anges egenskapen OverrideCursor till egenskapen Cursor för kontrollen Border. Detta tvingar markören att ändras för hela programmet.

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;
        }
    }
}

' 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

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