need help in displying gridview

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C#

SQL-Server

Hi all

i wrote the below code for binding and displaying the data in gridview

try
        {
 //       int searchstring;
        string qry = "SELECT question_bank.question, question_bank.answer,question_bank.subject, question_bank_1.docname,question_bank_1.year FROM question_bank INNER JOIN question_bank_1 ON question_bank.qno=question_bank_1.qno where question_bank_1.question like ' %"+ TextBox1.Text +" %' ORDER BY question_bank_1.qno";
        DataSet ds = db.upDataset(qry);
        GridView1.Visible = true;
        GridView1.DataSource = ds;
        GridView1.DataBind();
        }
       catch(Exception ex)
        {
        }

there is no error in the code but at end it not showing the gridview..please tell me where i am going wrong...