在C＃中从字符串变量设置控件事件 [英] Set a control event from string variable in C#

问题描述

大家好，

我有一个动态创建的文本框控件！

我想创建一个函数来设置textbox（或任何控件）事件及其委托来自字符串变量。

Hi all,
I have a textbox control which been created dynamically!
I want to make a function to set textbox's (or any control) event and its delegate from a string variables.

void SetEvent(ref Control control, string EventType, string EventDelegate)
{
     //Set control.event += delegate;   event = EventType and delegate = EventDelegate
}

函数调用：

Function call:

SetEvent("TextChanged", "txtBox_TextChanged"); //The function will set the event dynamically according to the parameters (txtBox.TextChanged += new EventHandler(txtBox_TextChanged);)
OR
SetEvent("DataBinding", "txtBox_DataBinding"); //The function will set the event dynamically according to the parameters (txtBox.DataBinding += new EventHandler(txtBox_DataBinding);)

如何实现此程序??????

How can I achieve this procedure??????

推荐答案

动态创建控件时，在客户端上为TextBox设置onchange事件。



您可以按以下方式执行此操作：

Set onchange event on clientside for your TextBox when you create your control dynamically.

You can do that as the follows:

yourTextBox.Attributes.Add("onchange", "alert(this.value);");

也许这可以帮到你：

解析C＃代码（作为字符串）并插入其他方法 [ ^ ]



执行包含c＃代码的用户提供的字符串 [ ^ ]

void SetEvent（对象控件，字符串eventTypes，字符串EventDelegate）

{

EventInfo ei = control.GetType （）。GetEvent（eventTypes）;



MethodInfo mi = this.GetType（）。GetMethod（EventDelegate，BindingFlags.Public | BindingFlags.Instance | BindingFlags.NonPublic）;



代表del = Delegate.CreateDelegate（ei.EventHandlerType，this，mi）;



ei.AddEventHandler（control，del）;

}

void SetEvent(object control, string eventTypes, string EventDelegate)
{
EventInfo ei = control.GetType().GetEvent(eventTypes);

MethodInfo mi = this.GetType().GetMethod(EventDelegate, BindingFlags.Public | BindingFlags.Instance | BindingFlags.NonPublic);

Delegate del = Delegate.CreateDelegate(ei.EventHandlerType, this, mi);

ei.AddEventHandler(control, del);
}

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