Rect 结构

定义

命名空间:

System.Windows

程序集:

WindowsBase.dll

描述矩形的宽度、高度和位置。

public value class Rect : IFormattable

[System.ComponentModel.TypeConverter(typeof(System.Windows.RectConverter))]
[System.Serializable]
public struct Rect : IFormattable

[System.ComponentModel.TypeConverter(typeof(System.Windows.RectConverter))]
public struct Rect : IFormattable

[<System.ComponentModel.TypeConverter(typeof(System.Windows.RectConverter))>]
[<System.Serializable>]
type Rect = struct
    interface IFormattable

[<System.ComponentModel.TypeConverter(typeof(System.Windows.RectConverter))>]
type Rect = struct
    interface IFormattable

Public Structure Rect
Implements IFormattable

继承

Object

ValueType

Rect

属性

TypeConverterAttribute SerializableAttribute

实现

IFormattable

示例

以下示例演示如何使用 Rect 结构使用 XAML 指定矩形的维度和位置。

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;       
        }
    }
}

Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Media
Imports System.Windows.Shapes

Namespace SDKSample
    Partial Public Class RectExample
        Inherits Page
        Public Sub New()
            Dim myPath1 As New Path()
            myPath1.Stroke = Brushes.Black
            myPath1.StrokeThickness = 1
            Dim mySolidColorBrush As 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:
            ' Dim myRect1 As New Rect(10,100,150,100")
            Dim myRect1 As New Rect()
            myRect1.X = 10
            myRect1.Y = 100
            myRect1.Width = 150
            myRect1.Height = 100
            Dim myRectangleGeometry1 As New RectangleGeometry()
            myRectangleGeometry1.Rect = myRect1

            Dim myGeometryGroup1 As New GeometryGroup()
            myGeometryGroup1.Children.Add(myRectangleGeometry1)

            myPath1.Data = myGeometryGroup1

            Dim myPath2 As 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.
            Dim myRect2 As New Rect()
            myRect2.Size = New Size(50, 200)
            myRect2.Location = New Point(300, 100)
            Dim myRectangleGeometry2 As New RectangleGeometry()
            myRectangleGeometry2.Rect = myRect2

            Dim myGeometryGroup2 As New GeometryGroup()
            myGeometryGroup2.Children.Add(myRectangleGeometry2)

            myPath2.Data = myGeometryGroup2

            ' Add path shape to the UI.
            Dim myCanvas As New Canvas()
            myCanvas.Children.Add(myPath1)
            myCanvas.Children.Add(myPath2)
            Me.Content = myCanvas
        End Sub
    End Class

End Namespace

<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>

以下示例演示如何使用代码创建矩形并将其添加到页面。 该示例还演示如何查找有关新矩形的大小和坐标信息，并在矩形下方呈现信息 TextBox 。

// 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;
}

注解

XAML 属性用法

<object property="x,y,width,height"/>  

XAML 值

x
System.Double

矩形左侧的 x 坐标位置。

y
System.Double

矩形上侧的 y 坐标位置。

width
System.Double

表示矩形的非负值 Width 。

height
System.Double

表示矩形的非负值 Height 。

构造函数

Rect(Double, Double, Double, Double)	初始化 Rect 结构的新实例，此结构具有指定的 x 坐标、y 坐标、宽度和高度。
Rect(Point, Point)	初始化 Rect 结构的新实例，此结构的大小刚好足以包含两个指定点。
Rect(Point, Size)	初始化 Rect 结构的新实例，此结构具有指定的左上角位置和指定的宽度及高度。
Rect(Point, Vector)	初始化 Rect 结构的新实例，此结构的大小刚好足以包含指定点及指定点和指定向量之和。
Rect(Size)	初始化 Rect 结构的新实例，此结构具有指定大小，位于 (0,0)。

属性

Bottom	获取矩形底边的 y 轴值。
BottomLeft	获取矩形的左下角位置。
BottomRight	获取矩形的右下角位置。
Empty	获取一个特殊值，该值表示没有位置或区域的矩形。
Height	获取或设置矩形的高度。
IsEmpty	获取一个值，该值指示矩形是否为 Empty 矩形。
Left	获取矩形左边的 x 轴值。
Location	获取或设置矩形的左上角位置。
Right	获取矩形右边的 x 轴值。
Size	获取或设置矩形的宽度和高度。
Top	获取矩形顶边的 y 轴位置。
TopLeft	获取矩形的左上角位置。
TopRight	获取矩形的右上角位置。
Width	获取或设置矩形的宽度。
X	获取或设置矩形左边的 x 轴值。
Y	获取或设置矩形顶边的 y 轴值。

方法

Contains(Double, Double)	指示矩形中是否包含指定的 x 坐标和 y 坐标。
Contains(Point)	指示矩形中是否包含指定点。
Contains(Rect)	指示矩形中是否包含指定矩形。
Equals(Object)	指示指定对象是否等于当前矩形。
Equals(Rect)	指示指定矩形是否等于当前矩形。
Equals(Rect, Rect)	指示指定的矩形是否相等。
GetHashCode()	创建矩形的哈希代码。
Inflate(Double, Double)	使用指定的宽度和高度量向所有方向放大或缩小矩形。
Inflate(Rect, Double, Double)	创建一个矩形，该矩形是通过将指定矩形向所有方向放大或缩小指定宽度和高度而得到的。
Inflate(Rect, Size)	返回矩形，该矩形是通过将指定矩形向所有方向放大指定 Size 而得到的。
Inflate(Size)	使用指定的 Size 向所有方向放大矩形。
Intersect(Rect)	查找当前矩形和指定矩形的交集，并将结果存储为当前矩形。
Intersect(Rect, Rect)	返回指定矩形的交集。
IntersectsWith(Rect)	指示指定矩形是否与当前矩形相交。
Offset(Double, Double)	将矩形沿水平和垂直方向移动指定的量。
Offset(Rect, Double, Double)	返回一个矩形，该矩形是通过将指定矩形偏移指定的水平和垂直量而得到的。
Offset(Rect, Vector)	返回一个矩形，该矩形是通过将指定矩形偏移指定向量而得到的。
Offset(Vector)	将矩形移动指定向量。
Parse(String)	根据指定的字符串表示形式创建新的矩形。
Scale(Double, Double)	将当前矩形的大小与指定的 x 和 y 值相乘。
ToString()	返回矩形的字符串表示形式。
ToString(IFormatProvider)	使用指定的格式提供程序返回矩形的字符串表示形式。
Transform(Matrix)	通过应用指定矩阵来转换矩形。
Transform(Rect, Matrix)	返回矩形，该矩形是通过向指定矩形应用指定矩阵而得到的。
Union(Point)	放大当前矩形，使其刚好足以包含指定点。
Union(Rect)	放大当前矩形，使其刚好足以包含指定矩形。
Union(Rect, Point)	创建一个矩形，该矩形的大小刚好足以包含指定矩形和指定点。
Union(Rect, Rect)	创建一个矩形，该矩形的大小刚好足以包含两个指定矩形。

运算符

Equality(Rect, Rect)	比较两个矩形是否完全相等。
Inequality(Rect, Rect)	比较两个矩形是否不相等。

显式接口实现

IFormattable.ToString(String, IFormatProvider)

使用指定格式对当前实例的值设置格式。