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Il presente articolo è stato tradotto automaticamente. Passare il puntatore sulle frasi nell'articolo per visualizzare il testo originale. Ulteriori informazioni.
Traduzione
Originale

Proprietà Rect.X

Ottiene o imposta il valore dell'asse x della parte sinistra del rettangolo.

Spazio dei nomi:  System.Windows
Assembly:  WindowsBase (in WindowsBase.dll)
XMLNS per XAML: http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation

public double X { get; set; }

Valore proprietà

Tipo: System.Double
Il valore dell'asse x della parte sinistra del rettangolo.

EccezioneCondizione
InvalidOperationException

X è impostato su Empty rettangolo.

Leggi questa proprietà equivale a ottenere Left proprietà.

Nell'esempio seguente viene illustrato come utilizzare un oggetto Rect struttura per specificare le dimensioni e la posizione di un rettangolo utilizzando XAML.


using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Shapes;

namespace SDKSample
{
    public partial class RectExample : Page
    {
        public RectExample()
        {   
            Path myPath1 = new Path();
            myPath1.Stroke = Brushes.Black;
            myPath1.StrokeThickness = 1;
            SolidColorBrush mySolidColorBrush = new SolidColorBrush();
            mySolidColorBrush.Color = Color.FromArgb(255, 204, 204, 255);
            myPath1.Fill = mySolidColorBrush;

            // Create the rectangle.
            // This RectangleGeometry specifies a rectangle that is 100 pixels high and
            // 150 wide. The left side of the rectangle is 10 pixels from the left of the 
            // Canvas and the top side of the rectangle is 100 pixels from the top of the Canvas.  
            // Note: You could alternatively use the Rect Constructor to create this:
            // Rect my Rect1 = new Rect(10,100,150,100");
            Rect myRect1 = new Rect();
            myRect1.X = 10;
            myRect1.Y = 100;
            myRect1.Width = 150;
            myRect1.Height = 100;
            RectangleGeometry myRectangleGeometry1 = new RectangleGeometry();
            myRectangleGeometry1.Rect = myRect1;

            GeometryGroup myGeometryGroup1 = new GeometryGroup();
            myGeometryGroup1.Children.Add(myRectangleGeometry1);

            myPath1.Data = myGeometryGroup1;

            Path myPath2 = new Path();
            myPath2.Stroke = Brushes.Black;
            myPath2.StrokeThickness = 1;
            myPath2.Fill = mySolidColorBrush;

            // Create the rectangle.
            // This Rect uses the Size property to specify a height of 50 and width
            // of 200. The Location property uses a Point value to determine the location of the
            // top-left corner of the rectangle.
            Rect myRect2 = new Rect();
            myRect2.Size = new Size(50, 200);
            myRect2.Location = new Point(300, 100);
            RectangleGeometry myRectangleGeometry2 = new RectangleGeometry();
            myRectangleGeometry2.Rect = myRect2;

            GeometryGroup myGeometryGroup2 = new GeometryGroup();
            myGeometryGroup2.Children.Add(myRectangleGeometry2);

            myPath2.Data = myGeometryGroup2;

            // Add path shape to the UI.
            Canvas myCanvas = new Canvas();
            myCanvas.Children.Add(myPath1);
            myCanvas.Children.Add(myPath2);
            this.Content = myCanvas;       
        }
    }

}



<Page  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
  <Canvas>

    <!-- This rectangle demonstrates using the X, Y, Width, and Height properties
         of a Rect object. -->
    <Path Stroke="Black" StrokeThickness="1" Fill="LemonChiffon">
      <Path.Data>

        <!-- This RectangleGeometry specifies a rectangle that is 100 pixels high and
             150 wide. The left side of the rectangle is 10 pixels from the left of the 
             Canvas and the top side of the rectangle is 100 pixels from the top of the Canvas.  
             Note: An abbreviated syntax for creating an equivalent rectangle is:
             <RectangleGeometry Rect="10,100,150,100" /> -->
        <RectangleGeometry>
          <RectangleGeometry.Rect>
            <Rect X="10" Y="100" Width="150" Height="100" />
          </RectangleGeometry.Rect>
        </RectangleGeometry>
      </Path.Data>
    </Path>

    <!-- This rectangle demonstrates using the Size and Location properties of a Rect object. -->
    <Path Stroke="Black" StrokeThickness="1" Fill="LemonChiffon">
      <Path.Data>

        <!-- This RectangleGeometry uses the Size property to specify a height of 50 and width
             of 200. The Location property uses a Point value to determine the location of the
             top-left corner of the rectangle. /> -->
        <RectangleGeometry>
          <RectangleGeometry.Rect>
            <Rect Size="50,200" Location="300,100" />
          </RectangleGeometry.Rect>
        </RectangleGeometry>
      </Path.Data>
    </Path>
  </Canvas>
</Page>



Nell'esempio seguente viene illustrato come utilizzare codice per creare un rettangolo e aggiungerlo alla pagina. Viene inoltre illustrato come trovare le informazioni di coordinate e di dimensione sul nuovo rettangolo ed esegue il rendering delle informazioni in un oggetto TextBox nel rettangolo.


// Create a rectangle and add it to the page. Also,
// find size and coordinate information about this
// new rectangle and render information in a TextBox 
// below the rectangle.
private StackPanel createRectExample1()
{
    // Initialize new rectangle.
    Rect myRectangle = new Rect();

    // The Location property specifies the coordinates of the upper left-hand 
    // corner of the rectangle. Set the Location property to an X coordinate of 10 and a
    // Y coordinate of 5. 
    myRectangle.Location = new Point(10, 5);

    // Set the Size property of the rectangle with a width of 200
    // and a height of 50.
    myRectangle.Size = new Size(200, 50);

    RectangleGeometry myRectangleGeometry = new RectangleGeometry();
    myRectangleGeometry.Rect = myRectangle;

    // This path is defined by the rectangle.
    Path myPath = new Path();
    myPath.Fill = Brushes.LemonChiffon;
    myPath.Stroke = Brushes.Black;
    myPath.StrokeThickness = 1;
    myPath.Data = myRectangleGeometry;

    //////////// Create string of rectangle property information /////////////
    // This string will contain all the size and coordinate property
    // information about the rectangle.
    /////////////////////////////////////////////////////////////////////////
    string rectInfo = "Rectangle Property Information: ";

    // Bottom property gets the y-axis value of the bottom of the rectangle. 
    // For this rectangle the value is 55.
    rectInfo = rectInfo + "Bottom: " + myRectangle.Bottom;

    // BottomLeft property gets the coordinates of the bottom left corner of the rectangle. 
    // For this rectangle the value is 10,55.
    rectInfo = rectInfo + "| BottomLeft: " + myRectangle.BottomLeft;

    // BottomRight property gets the coordinates of the bottom right corner of the rectangle. 
    // For this rectangle the value is 210,55.
    rectInfo = rectInfo + "| BottomRight: " + myRectangle.BottomRight;

    // Height property gets or sets the height of the rectangle. 
    // For this rectangle the value is 50.
    rectInfo = rectInfo + "| Height: " + myRectangle.Height;

    // Width property gets or sets the width of the rectangle. 
    // For this rectangle the value is 200.
    rectInfo = rectInfo + "| Width: " + myRectangle.Width;

    // Left property gets the x-axis position of the left side of the rectangle which is 
    // equivalent to getting the rectangle's X property. 
    // For this rectangle the value is 10.
    rectInfo = rectInfo + "| Left: " + myRectangle.Left;

    // Location property gets or sets the position of the rectangle's top-left corner.
    // For this rectangle the value is 10,5.
    rectInfo = rectInfo + "| Location: " + myRectangle.Location;

    // Right property gets the x-axis value of the right side of the rectangle. 
    // For this rectangle the value is 210.
    rectInfo = rectInfo + "| Right: " + myRectangle.Right;

    // Size property gets or sets the width and height of the rectangle.  
    // For this rectangle the value is 200,50.
    rectInfo = rectInfo + "| Size: " + myRectangle.Size;

    // Top property gets the y-axis position of the top of the rectangle which is 
    // equivalent to getting the rectangle's Y property.
    // For this rectangle the value is 5.
    rectInfo = rectInfo + "| Top: " + myRectangle.Top;

    // TopLeft property gets the position of the top-left corner of the rectangle, which 
    // is equivalent to (X, Y).   
    // For this rectangle the value is 10,5.
    rectInfo = rectInfo + "| TopLeft: " + myRectangle.TopLeft;

    // TopRight property gets the position of the top-left corner of the rectangle, which 
    // is equivalent to (X + Width, Y).   
    // For this rectangle the value is 210,5.
    rectInfo = rectInfo + "| TopRight: " + myRectangle.TopRight;

    // X property gets or sets the location of the rectangle's left side.  
    // For this rectangle the value is 10.
    rectInfo = rectInfo + "| X: " + myRectangle.X;

    // Y property gets or sets the location of the rectangle's top side.  
    // For this rectangle the value is 5.
    rectInfo = rectInfo + "| Y: " + myRectangle.Y;

    //////// End of creating string containing rectangle property information ////////

    // This StackPanel will contain the rectangle and TextBlock.
    StackPanel parentPanel = new StackPanel();

    // Add the rectangle path to the StackPanel. This will display the rectangle.
    parentPanel.Children.Add(myPath);

    // Add a TextBlock to display the rectangle's size and coordinate information.
    TextBlock myTextBlock = new TextBlock();
    myTextBlock.Text = rectInfo;
    parentPanel.Children.Add(myTextBlock);

    // Return the parent container to be displayed to the screen.
    return parentPanel;
}


.NET Framework

Supportato in: 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supportato in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (ruoli di base del server non supportati), Windows Server 2008 R2 (ruoli di base del server supportati con SP1 o versione successiva, Itanium non supportato)

.NET Framework non supporta tutte le versioni di ciascuna piattaforma. Per un elenco delle versioni supportate, vedere Requisiti di sistema di .NET Framework.

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