extjs/c# - how to save data from a form to a database?

im trying to add a new user to my database via a form i prepared the form but my problem is how to save the data from this form to my database ? im using c# and extjs4.0.1

i know i need to use submit on a button and give it an url i did that but when i click on it nothing happens! no errors! i get the success info box! but when i check the database, there is nothing inserted!like my updateuser function have never been called?!!

here is my form script:

buttons: [{
                     text: 'Save user',
                     handler: function () {
                             if (this.up('form').getForm().isValid())
                                 this.up('form').getForm().submit
                                 ({// this would submit the form to the configured url
                                     url: 'update.ashx',
                                     success: function (form, action) {
                                         Ext.MessageBox.show({
                                             title: 'Success !',
                                             msg: 'Changes saved successfully<br />',
                                             icon: Ext.MessageBox.INFO
                                         })
                                     },                                        
                                 });
                                 this.up('form').getForm().reset();

                     }

and here is my update.ashx script:

public class update : IHttpHandler
{
    SqlConnection dbConn = new SqlConnection("....");

    public void ProcessRequest(HttpContext context)
    {        }

    public bool IsReusable
    {
        get           {          return false;            }
    }

    public void updateUser(string firstname, string lastname, string email)
    {


        string str = "insert into User  (Name , FName , Email ) values ( '" + firstname + "' , '" + lastname + "' , '" + email + "' )";

        SqlCommand sqlCommand = new SqlCommand(str);
        sqlCommand.Connection = dbConn;
        sqlCommand.CommandType开发者_开发技巧 = CommandType.Text;
        SqlDataAdapter sda = new SqlDataAdapter(sqlCommand);
        dbConn.Open();

        if (sqlCommand.Connection.State == ConnectionState.Open)
        {
            sqlCommand.ExecuteNonQuery();
            dbConn.Close();
        }
    }

}

do you have any idea please? at least let me know if im on the right way or not... thanks

first of all "success: function (form, action)" this function call doesn't mean that the update user was a succes , just that the submit was successful .. for success you need to encode a json with success true, and then action.result.success will determine if success was true... check the api .....

Second, i'm not much of a c# guy ... but it seems you don't even process the request

Edit:

To avoid your duplicate problem send an extra param to the handler ... and execute the update method only when receiving the update action in the request

url: 'update.ashx',
params: {action: 'update'},
success: function (form, action) {

the form submit sends the form values to the handler inside the HttpRequest object contained by the context object.. for retriving the form values you can check http://msdn.microsoft.com/en-us/library/system.web.ihttphandler.processrequest.aspx example