如何使控件跟随其数据源？ [英] How to cause a control follow its datasource?

问题描述

一开始，当我将我的集合分配给控件的DataSource时，它会跟随集合中的内容。在我的程序执行期间，当集合发生变化时，我看不到控件内容的任何变化。如何让控件跟随收藏品的最新变化？



我尝试过：



我知道的唯一方法是将DataSource设置为null，然后再将其设置为集合！但我认为，这可能不是一个好主意。

At the beginning, when I assign my collection to a control's DataSource, it follows what is in the collection. During the execution of my program, when the collection changes, I don't see any change in the control's content. How can I make the control follow the latest changes of the collection?

What I have tried:

The only way I know is to set DataSource to null and then set it to the collection again! But I think, this may not be a good idea.

推荐答案

尝试使用BindingList：

Try using a BindingList:

class MyClass
    {
    public string Str { get; set; }
    public int I { get; set; }
    }
BindingList<MyClass> myBindingList = new BindingList<MyClass>();
private void button1_Click(object sender, EventArgs e)
    {
    myBindingList.Add(new MyClass() { Str = "s1", I = 100 });
    myBindingList.Add(new MyClass() { Str = "s2", I = 101 });
    myBindingList.Add(new MyClass() { Str = "s3", I = 102 });
    myBindingList.Add(new MyClass() { Str = "s4", I = 103 });
    myBindingList.Add(new MyClass() { Str = "s5", I = 104 });
    MyDataGridView.DataSource = myBindingList;
    }
private void button2_Click(object sender, EventArgs e)
    {
    myBindingList.Add(new MyClass() { Str = "sX", I = 666 });
    }

每次单击Button2时，都会在DataGridView中添加一个字符串。

Every time you click Button2, a string will be added to teh DataGridView.

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