asmx web service, json, javascript/jquery?

Question

I am using asmx to retrieve some data from DB,

public class TestPage1
{
    public int UserID { get; set; }
    public string UserName { get; set; }
    pub         


        

Answer 1

A couple things...

• Your web-service must be marked with a ScriptServiceAttribute to allow it to return JSON (http://msdn.microsoft.com/en-us/library/system.web.script.services.scriptserviceattribute.aspx)
• Your $.ajax method must have a "success" handler (http://api.jquery.com/jQuery.ajax/)
• The returned JavaScript object will have the same property names as the C# object
• A good way to see the JSON serialized object in transit is to use Fiddler (http://www.fiddler2.com/fiddler2/)

Some untested sample code:

$.ajax({
  type: "POST",
  contentType: "application/json; charset=utf-8",
  url: "WebService.asmx/GetData",
  data: "{id}",
  dataType: "json"
  success: function(data) {
    var str = '' +
      'UserName: ' + data.UserName + '\n' +
      'Password: ' + data.Password + '\n' +
      'FirstName: ' + data.FirstName + '\n' +
      'LastName: ' + data.LastName + '\n' +
      'MiddleName: ' + data.MiddleName;
    alert(str);
  }
});