Question

I wrote this code to get data from mysql database using odbc connection. Its giving no error but no output as well. Am not able to find what the matter is.

public partial class Members : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        DataTable table = new DataTable();
        string conString = WebConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
        try
        {
            using (OdbcConnection con = new OdbcConnection(conString))
            {
                con.Open();
                // We are now connected. Now we can use OdbcCommand objects
                // to actually accomplish things.
                using (OdbcCommand com = new OdbcCommand("SELECT * FROM abc", con))
                {
                    using (OdbcDataAdapter ad = new OdbcDataAdapter(com))
                    {
                        ad.Fill(table);
                    }
                }
                con.Close();
            }
        }
        catch (Exception ei)
        {
            Label1.Text = ei.Message;
        }

        GridView1.DataSource=table;
        GridView1.DataBind();
    }
}

Answer 1

In web.config do you have a connectionString? Please check that.
If not you can add datasource from visual studio designer and it will ask to add connection string in one of the steps .At the end you can remove datasource from designer but still have connectionstring in web.config file .And in your code behind can you try this

string SQL_CONNECTION_STRING = System.Configuration.ConfigurationManager.ConnectionStrings[“SqlConnectionTest”].ConnectionString;

where “SqlConnectionTest” is the name of connection string in web.config.