如何修改的PropertyGrid在运行时（添加/删除属性和动态类型/枚举） [英] How to modify PropertyGrid at runtime (add/remove property and dynamic types/enums)

问题描述

你如何修改的PropertyGrid在运行时以各种方式？我希望能够添加和删除属性和添加动态类型，我的意思与使用的TypeConverter导致在PropertyGrid中运行时产生的下拉列表中选择类型。

How do you modify a propertygrid at runtime in every way? I want to be able to add and remove properties and add "dynamic types", what I mean with that is a type that result in a runtime generated dropdown in the propertygrid using a TypeConverter.

我实际上已经能够做到这两个东西（添加/删除属性和添加动态类型），但只有未单独在同一时间。

I have actually been able to do both those things (add/remove properties and add dynamic type) but only separately not at the same time.

要落实支持添加和在运行时删除属性我用这个$ C $的CProject文章，并修改了codeA位，以支持不同类型（不只是字符串）。

To implement the support to add and remove properties at runtime I used this codeproject article and modified the code a bit to support different types (not just strings).

private System.Windows.Forms.PropertyGrid propertyGrid1;
private CustomClass myProperties = new CustomClass();

public Form1()
{
    InitializeComponent();

    myProperties.Add(new CustomProperty("Name", "Sven", typeof(string), false, true));
    myProperties.Add(new CustomProperty("MyBool", "True", typeof(bool), false, true));
    myProperties.Add(new CustomProperty("CaptionPosition", "Top", typeof(CaptionPosition), false, true));
    myProperties.Add(new CustomProperty("Custom", "", typeof(StatesList), false, true)); //<-- doesn't work
}

/// <summary>
/// CustomClass (Which is binding to property grid)
/// </summary>
public class CustomClass: CollectionBase,ICustomTypeDescriptor
{
    /// <summary>
    /// Add CustomProperty to Collectionbase List
    /// </summary>
    /// <param name="Value"></param>
    public void Add(CustomProperty Value)
    {
    	base.List.Add(Value);
    }

    /// <summary>
    /// Remove item from List
    /// </summary>
    /// <param name="Name"></param>
    public void Remove(string Name)
    {
    	foreach(CustomProperty prop in base.List)
    	{
    		if(prop.Name == Name)
    		{
    			base.List.Remove(prop);
    			return;
    		}
    	}
    }

等等...

etc...

public enum CaptionPosition
{
    Top,
    Left
}

我的完整的解决方案可以在这里下载。

My complete solution can be downloaded here.

它工作正常，当我添加字符串，布尔变量或枚举，但是当我尝试添加一个动态类型之类StatesList这是行不通的。没有人知道为什么，可以帮助我解决呢？

It works fine when I add strings, bools or enums, but when I try to add a "dynamic type" like StatesList it doesn't work. Does anyone know why and can help me to solve it?

public class StatesList : System.ComponentModel.StringConverter
{
    private string[] _States = { "Alabama", "Alaska", "Arizona", "Arkansas" };

    public override System.ComponentModel.TypeConverter.StandardValuesCollection
    GetStandardValues(ITypeDescriptorContext context)
    {
    	return new StandardValuesCollection(_States);
    }

    public override bool GetStandardValuesSupported(ITypeDescriptorContext context)
    {
    	return true;
    }

    public override bool GetStandardValuesExclusive(ITypeDescriptorContext context)
    {
    	return true;
    }
}

使用类型转换器的方法，正常工作时，你不要试图添加属性在运行时，例如的这code 的工作没有任何问题，但我希望能够做到这两点。

The method of using a TypeConverter works fine when you don't try to add the property at runtime, for example this code works without any problem, but I want to be able to do both.

请看看我的项目。 谢谢！

推荐答案

你做了什么，是增加StatesList（一个类型转换器）作为属性。
你应该做的，是增加与StatesList属性作为其类型转换器。

What you do, is adding StatesList (a TypeConverter) as a property.
What you should do, is adding a property with StatesList as its TypeConverter.

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