asp.net : how to send a array from client to server web method

In ASP.NET, I have collected a list of selected items from a checkbox in an array at the client side. Now I need to pass the ar开发者_StackOverflowray from client to server's ASMX web method. How do I do this?

Add a JSON library to your page, use json2.js here. That gives you a function to serialize javascript arrays into JSON strings.

You can then pass it into your webmethod:

[WebMethod] 
public void MyWebMethod(List<string> someValues)
{
    // Use someValues...
}

Here's the javascript you need

var arrayData = ["1","2","3"]; // Your array goes here

$.ajax({
  type: "POST",
  url: "MyWebService.asmx/MyWebMethod",
  data: JSON.stringify({ someValues: arrayData }),
  contentType: "application/json; charset=utf-8",
  dataType: "json",
  success: function() 
  {
    // Your success function...
  }
});

Client-Side Web Service Calls with AJAX Extensions

Calling Web Services from Client Script