DataSource和DataMember属性(按代码) [英] DataSource And DataMember Property By Code

问题描述

这是我想做的事情:



对象DataSource_m;

公共对象DataSource
{
获取
{

return DataSource_m;

}

设置
{

DataSource_m =值;

}

}



此属性用于自定义控件.

现在，当我在窗体中添加此控件并转到其属性窗口时，在设计器模式下，将按预期获得A属性作为DataSource.

当我单击数据源属性"以附加数据库时，我没有在该属性中获得添加项目数据源"选项，这通常是在DataGridView控件的数据源属性中得到的.
我应该使用什么属性来获取那个.

屏幕截图:

http://adieu.webs.com/Images/Untitled.bmp

here is what i want to do:



object DataSource_m;

public object DataSource
{
get
{

return DataSource_m;

}

set
{

DataSource_m = value;

}

}



this property is for a Custom Control.

Now When I add this Control in a form and go to its property window I get A property as DataSource as expected, in the designer mode.

when i click the DataSource Property to attach a databse, i dont get the "Add Project DataSource" option in the property, which we usually get in the DataGridView Control''s DataSource Property......

what attributes should i use to get That.

SCREENSHOT:

http://adieu.webs.com/Images/Untitled.bmp

推荐答案

嘿，

在此处 [

Hey there,

There is a walk through here[^] on MSDN that you will find helpful.

The key thing you''re likely missing is adding the attributes required to pick up those properties.

Cheers.

您可以轻松地做到这一点:

you can simply do this:

using System.ComponentModel;
//more using statements

public class YourClass:SomeControl
{
    object DataSource_m;

    
    [AttributeProvider(typeof(IListSource)), RefreshProperties(RefreshProperties.Repaint)]
    public object DataSource
    {
        get{ return DataSource_m;}
        set{ DataSource_m = value;}
    }

}

[更新:您可能还需要RefreshProperties属性]

[回应评论]
这是我的课程:

[Update: you''ll probably also want the RefreshProperties Attribute]

[Response to comment]
This is my class:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.ComponentModel;
namespace TestFormCSharp
{
    class MyDataSourceClass:Control
    {
        object dataSource_m;
        [AttributeProvider(typeof(IListSource)), RefreshProperties(RefreshProperties.Repaint)]
        public object DataSource
        {
            get { return dataSource_m; }
            set { dataSource_m = value; }
        }
    }
}

这就是我得到的:
http://yfrog.com/bfscreenshotdatasourcej [ ^ ]

如果您使用的是VS，那么您必须向我们展示更多的类声明和/或告诉我们您使用的是哪个版本的VS ...如果您使用的是VS；

and this is what I get:
http://yfrog.com/bfscreenshotdatasourcej[^]

If you''re not getting the same, then you''d have to show us more of your class declaration and/or tell us what version of VS you''re using...if you''re using VS;

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