在ASP.NET用户控件中，我想向客户端公开方法

Question

I have an User Control Which is having a lot of lot methods. I want to expose a method to client. So that i can call the method of the control in javascript and get the result.

For Example: A method called, GetData(), which will get the data from the server. Currently i am calling this method only on code behind. It will return the data. Now i want to call the same method in client side.

Is it possible?

Answer 1

You have a couple of approaches, which will vary on your technology. If your project is using:

• Web-Forms:

Example:

<div>
     <span><%= GetData(Eval("Data Column").ToString()) %></span>
</div>

That would be your front end, you notice how your exposing the method.

protected string GetData(string content)
{
     // Do Something.
}

That is the code behind, which is your method. It must be protected or public it can not be private .

• Web-Method: This is viable, but as mentioned above it isn't supported anymore. So I won't provide an example, though they exist.
• Model View Controller:

Example:

<div>
     <span>@{ ClassName.GetData() }</span>
</div>

That is the front end, as you notice you use Razor to expose the method from behind. That will help you call a method from the Controller .

Those are a couple of approaches, hopefully that points you in the right direction.

Answer 2

You need to use webmethods:

Have a look at: http://encosia.com/using-jquery-to-directly-call-aspnet-ajax-page-methods/