Not answered Page Methods not getting invoked

Hi All,

I have defined a Shared Function in the code behind and a javascript function to call the webmethod. Also, I have EnablePageMethogs set to true in ScriptManager.

However, nothing seems to be working.

Below is the code behind and javascript code used.

Code Behind:-

[System.Web.Services.WebMethod()]
    public static ArrayList getSubCategoriesByCategoryID(int categoryID)
    {

        SqlConnection test = new SqlConnection(ConfigurationManager.ConnectionStrings["test"].ConnectionString);
      
        ArrayList subCategories = new ArrayList();

        try
        {
            string description;
            if (conn.State == ConnectionState.Closed)
            {
                test.Open();
            }
            SqlCommand getSubCategories = new SqlCommand();
            getSubCategories.CommandType = CommandType.StoredProcedure;
            getSubCategories.CommandText = "dbo.test_proc";
            getSubCategories.Parameters.Add("@categoryid", SqlDbType.VarChar,12).Value = categoryID;
            getSubCategories.Connection = test;

            SqlDataReader dr = getSubCategories.ExecuteReader();

            if (dr.HasRows)
            {

                while (dr.Read())
                {

                    description =   (string)dr.GetValue(0);
                    subCategories.Add(description);
                                   
                 }
            }
        
        }
     
        catch (Exception ex)
        {
            ex.ToString();
        }

        return subCategories;
        // Return toReturn
    }

and Javascript:-

 function getSubCategory(sender, args) {
        var categoryID = sender.get_value();

        PageMethods.getSubCategoriesByCategoryID(categoryID, CallSuccess);
 

    }

Thanks