Question

I’m using Asp.net c# and MYSql as back-end. I’m updating a table,but table is not updating.There are only 3 columns in the table.

There is no exception when I’m executing the command object. But this returns 0 value from cmd.ExecuteNonQuery().

I debugged this and found cmd.Parameters are full with values. and if i manually run the update command in mysql it works fine.

the table is as follow

column -- Datatype   
ShortText -- varchar   
title -- varchar   
id -- int   

Please guide me…

int retVal = 0;
        string shortText = ((TextBox)fmvwShortText.FindControl("txtShortText")).Text.Trim();
        try
        {
            int id = Convert.ToInt32(((Label)fmvwShortText.FindControl("lblShrtTextID")).Text);
            MySqlConnection con = new MySqlConnection(System.Configuration.ConfigurationManager.AppSettings["conn"]);
            cmd = new MySqlCommand();
            cmd.Connection = con;
            cmd.CommandText = "UPDATE temp_posts SET ShortText=@shrtText WHERE id=@id AND Title=@title";
            cmd.Parameters.Add("@shrtText", MySqlDbType.VarChar).Value = shortText;
            cmd.Parameters.Add("@title", MySqlDbType.VarChar).Value =Session["EditTitle"].ToString();
            cmd.Parameters.Add("@id", MySqlDbType.Int32).Value = id;
            con.Open();
            retVal = cmd.ExecuteNonQuery();
            con.Close();
        }
        catch (Exception e) { }
        return retVal;   

Answer 1

First of all thank you every one who kept looking and tried their best to sort out this problem with me..

Finally got the solution.

In my code I used @ in cmd.CommandText and in parameters.
But when I replace this @ with ? both in cmd.CommandText and in parameters and used the cmd.ExecuteScalar(); this worked.

Actually Parameter names depend on the provider. When using the provider for
SQL Server, it should start with @ (e.g. @param1). For Oracle
provider, it should start with a colon (…for e.g. aram1. For
OleDb provider, just a question mark (?) would work

Thank you everyone to contribute your best… many thanks

But i’m still left with a question that ExecuteScalar() is updating the records in the database? I am with no answer… looking for this.