check whether data exists in table

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Hi
I have logout.aspx page in which when someone clicks the logout then it will check in database whether time is entered by the user and if not it will throw an error.

I want sql query for this using javascript.

can somebody help me in this.

Posted 13-Sep-11 21:03pm

richa11

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AditSheth · Answer 1 · 2011-09-13T22:39:00

Hi you can not call sql query from javascript..You can do this by calling web method from Jquery Ajax and get response from that.

for example,

JavaScript

$.ajax({
      type: "POST",
      url: "WebService.aspx/CheckLogout",
      data: "{}",
      contentType: "application/json; charset=utf-8",
      dataType: "json",
      success: function(msg) {
        // Replace the div's content with the page method's return.
        alert(msg.d);
      }
    });

Create a CheckLogout web method in WebService.aspx page and return result

C#

[System.Web.Services.WebMethod]
public static String CheckLogout()
{
   // return result
}