本文整理汇总了C#中System.ComponentModel.ITypeDescriptorContext接口的典型用法代码示例。如果您正苦于以下问题：C# ITypeDescriptorContext接口的具体用法？C# ITypeDescriptorContext怎么用？C# ITypeDescriptorContext使用的例子？那么恭喜您, 这里精选的接口代码示例或许可以为您提供帮助。
ITypeDescriptorContext接口属于System.ComponentModel命名空间，在下文中一共展示了ITypeDescriptorContext接口的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: Triangle
namespace Microsoft.Samples.InstanceDescriptorSample
{
using System;
using System.ComponentModel;
using System.ComponentModel.Design.Serialization;
using System.Drawing;
using System.Globalization;
using System.Reflection;
// This sample shows how to support code generation for a custom type
// of object using a type converter and InstanceDescriptor objects.
// To use this code, copy it to a file and add the file to a project.
// Then add a component to the project and declare a Triangle field and
// a public property with accessors for the Triangle field on the component.
// The Triangle property will be persisted using code generation.
[TypeConverter(typeof(Triangle.TriangleConverter))]
public class Triangle
{
// Triangle members.
Point P1;
Point P2;
Point P3;
public Point Point1 {
get {
return P1;
}
set {
P1 = value;
}
}
public Point Point2 {
get
{
return P2;
}
set
{
P2 = value;
}
}
public Point Point3 {
get
{
return P3;
}
set
{
P3 = value;
}
}
public Triangle(Point point1,Point point2,Point point3) {
P1 = point1;
P2 = point2;
P3 = point3;
}
// A TypeConverter for the Triangle object. Note that you can make it internal,
// private, or any scope you want and the designers will still be able to use
// it through the TypeDescriptor object. This type converter provides the
// capability to convert to an InstanceDescriptor. This object can be used by
// the .NET Framework to generate source code that creates an instance of a
// Triangle object.
internal class TriangleConverter : TypeConverter
{
// This method overrides CanConvertTo from TypeConverter. This is called when someone
// wants to convert an instance of Triangle to another type. Here,
// only conversion to an InstanceDescriptor is supported.
public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType)
{
if (destinationType == typeof(InstanceDescriptor))
{
return true;
}
// Always call the base to see if it can perform the conversion.
return base.CanConvertTo(context, destinationType);
}
// This code performs the actual conversion from a Triangle to an InstanceDescriptor.
public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
{
if (destinationType == typeof(InstanceDescriptor))
{
ConstructorInfo ci = typeof(Triangle).GetConstructor(new Type[]{typeof(Point),
typeof(Point),typeof(Point)});
Triangle t = (Triangle) value;
return new InstanceDescriptor(ci,new object[]{t.Point1,t.Point2,t.Point3});
}
// Always call base, even if you can't convert.
return base.ConvertTo(context, culture, value, destinationType);
}
}
}
public class TestComponent : System.ComponentModel.Component
{
Triangle myTriangle;
public TestComponent() {
myTriangle = new Triangle(
new Point(5,5),
new Point(10,10),
new Point(1,8)
);
}
public Triangle MyTriangle {
get {
return myTriangle;
}
set {
myTriangle = value;
}
}
}
}