编辑

通过

TransformPattern.Resize(Double, Double) Method

Definition

Namespace:
System.Windows.Automation
Assembly:
UIAutomationClient.dll

Resizes the control.

public:
 void Resize(double width, double height);
public void Resize(double width, double height);
member this.Resize : double * double -> unit
Public Sub Resize (width As Double, height As Double)

Parameters

width
Double

The new width of the window, in pixels.

height
Double

The new height of the window, in pixels.

Exceptions

InvalidOperationException

The CanResize property is false.

Examples

In the following example, a TransformPattern control pattern is obtained from an AutomationElement and subsequently used to resize the AutomationElement.

///--------------------------------------------------------------------
/// <summary>
/// Obtains a TransformPattern control pattern from 
/// an automation element.
/// </summary>
/// <param name="targetControl">
/// The automation element of interest.
/// </param>
/// <returns>
/// A TransformPattern object.
/// </returns>
///--------------------------------------------------------------------
private TransformPattern GetTransformPattern(
    AutomationElement targetControl)
{
    TransformPattern transformPattern = null;

    try
    {
        transformPattern =
            targetControl.GetCurrentPattern(TransformPattern.Pattern)
            as TransformPattern;
    }
    catch (InvalidOperationException)
    {
        // object doesn't support the TransformPattern control pattern
        return null;
    }

    return transformPattern;
}

'''--------------------------------------------------------------------
''' <summary>
''' Obtains a TransformPattern control pattern from 
''' an automation element.
''' </summary>
''' <param name="targetControl">
''' The automation element of interest.
''' </param>
''' <returns>
''' A TransformPattern object.
''' </returns>
'''--------------------------------------------------------------------
Private Function GetTransformPattern( _
ByVal targetControl As AutomationElement) As TransformPattern
    Dim transformPattern As TransformPattern = Nothing

    Try
        transformPattern = DirectCast( _
        targetControl.GetCurrentPattern(transformPattern.Pattern), _
        TransformPattern)
    Catch exc As InvalidOperationException
        ' object doesn't support the TransformPattern control pattern
        Return Nothing
    End Try

    Return transformPattern

End Function 'GetTransformPattern

///--------------------------------------------------------------------
/// <summary>
/// Calls the TransformPattern.Resize() method for an associated 
/// automation element.
/// </summary>
/// <param name="transformPattern">
/// The TransformPattern control pattern obtained from
/// an automation element.
/// </param>
/// <param name="width">
/// The requested width of the automation element.
/// </param>
/// <param name="height">
/// The requested height of the automation element.
/// </param>
///--------------------------------------------------------------------
private void ResizeElement(
    TransformPattern transformPattern, double width, double height)
{
    try
    {
        if (transformPattern.Current.CanResize)
        {
            transformPattern.Resize(width, height);
        }
    }
    catch (InvalidOperationException)
    {
        // object is not able to perform the requested action
        return;
    }
}

'''--------------------------------------------------------------------
''' <summary>
''' Calls the TransformPattern.Resize() method for an associated 
''' automation element.
''' </summary>
''' <param name="transformPattern">
''' The TransformPattern control pattern obtained from
''' an automation element.
''' </param>
''' <param name="width">
''' The requested width of the automation element.
''' </param>
''' <param name="height">
''' The requested height of the automation element.
''' </param>
'''--------------------------------------------------------------------
Private Sub ResizeElement( _
ByVal transformPattern As TransformPattern, _
ByVal width As Double, ByVal height As Double)
    Try
        If transformPattern.Current.CanResize Then
            transformPattern.Resize(width, height)
        End If
    Catch
        ' object is not able to perform the requested action
        Return
    End Try

End Sub

Remarks

When called on a control that supports split panes, this method can have the side effect of resizing other contiguous panes.

An object cannot be moved, resized, or rotated such that its resulting screen location would be completely outside the coordinates of its container and inaccessible to keyboard or mouse. For example, when a top-level window is moved completely off-screen or a child object is moved outside the boundaries of the container's viewport. In these cases the object is placed as close to the requested screen coordinates as possible with the top or left coordinates overridden to be within the container boundaries.

Applies to