使用一个声明管理所有已更改文本的事件 [英] Manage all textchanged events with one declare

问题描述

我有很多文本框，现在我想将所有textChanged事件绑定到一个
事件处理程序，是否可以声明一个对象来处理所有textChanged事件?
我的意思是这样的:

I have many textbox ,now I want to bind all textChanged events to one
event handler ,is it possible to declare an object to handle all textChanged events?
I mean something like this :

(TextBox).TextChanged += new EventHandler(txt_TextChanged);

请告诉我如何?

please tell me HOW?

推荐答案

您可以编写一种方法来处理多个文本框的textchanged方法.

EventHandler采用要与事件关联的方法的名称.因此，如果您为多个textchanged提到相同的名称，则可以使用.

Hi,

You can write one method to handle multiple textbox''s textchanged method.

EventHandler takes the name of the method to be associated with the event. Hence if you mention same name for multiple textchanged, it would work.

TextBox1.TextChanged += new EventHandler(txt_TextChanged);
TextBox2.TextChanged += new EventHandler(txt_TextChanged);
TextBox3.TextChanged += new EventHandler(txt_TextChanged);

上面的代码显示了3个文本框(TextBox1，TextBox2，TextBox3)如何具有相同的事件处理程序方法(txt_TextChanged).

希望有帮助，

谢谢，
Arindam D Tewary

Above code shows how 3 textbox(TextBox1,TextBox2,TextBox3) having same event handler method (txt_TextChanged).

Hope that helps,

Thanks,
Arindam D Tewary

好，您已经知道如何向TextChanged事件添加事件处理程序，而且我想您也知道，如果在这种情况下指定相同的方法名称，则然后所有这些对象将使用相同的方法来处理TextChanged事件，例如；

OK you already know how to add a event handler to the TextChanged event and I''m guessing you also know that if you specify the same method name in this case txt_TextChanged then all the then they would use the same method to process the TextChanged event, such as;

void txt_TextChanged(object sender, EventArgs e)
{
    //This becomes a reference to the TextBox that raised the TextChanged event
    TextBox textBox = sender as TextBox;

}

如果要使用单独的类来处理所有TextChanged事件，也可以这样做.
如果您创建如下所示的类(请记住将using System.Windows.Forms;添加到该类中)；

If you want to use a separate class to process all TextChanged events you can also do that.
If you create a class like the following (remember to add using System.Windows.Forms; to the class);

public class TextChangeHandler
{
    public void TextChanged(object sender, EventArgs e)
    {
        //This becomes a reference to the TextBox that raised the TextChanged event
        TextBox textBox = sender as TextBox;
    }
}

然后，您可以使用以下代码来处理TextChanged事件；

you can then use the following to handle the TextChanged event;

//This needs to be global for the form
TextChangeHandler txtChangeHandler = new TextChangeHandler();

//These go in the form constructor
textBox1.TextChanged += new EventHandler(txtChangeHandler.TextChanged);
textBox2.TextChanged += new EventHandler(txtChangeHandler.TextChanged);
textBox3.TextChanged += new EventHandler(txtChangeHandler.TextChanged);

您还可以将类设为静态并使用；

You can also make the class static and use;

public static class TextChangeHandler
{
    public static void TextChanged(object sender, EventArgs e)
    {
        //This becomes a reference to the TextBox that raised the TextChanged event
        TextBox textBox = sender as TextBox;
    }
}

然后，您可以使用以下代码来处理TextChanged事件；

you can then use the following to handle the TextChanged event;

textBox1.TextChanged += new EventHandler(TextChangeHandler.TextChanged);
textBox2.TextChanged += new EventHandler(TextChangeHandler.TextChanged);
textBox3.TextChanged += new EventHandler(TextChangeHandler.TextChanged);

尝试以下操作:

Try this:

foreach (Control c in this.Controls)
{
    ((TextBox)c).TextChanged += new EventHandler(Form1_TextChanged);
}

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