My Question is related to grid view in ASP.NET

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C#

private void LoadDesignCourseQuizez()
    {
         string semester = Semester.Text.ToString();
        string coursename = Course_Name.Text.ToString();
        DataTable dt = new DataTable();
        dt = IITBAL.FacultyCourses.GetDesignCourseQuizez(SessionId,coursename,semester);
        int quizez = Convert.ToInt32(dt.Rows[0]["Quizez"].ToString());
        for (int i = 1; i <= quizez; i++)
        {
            TemplateField tf = new TemplateField();
            tf.HeaderText = "Q" + i;
            GridView1.DataSource = tf;
            GridView1.DataBind();
          

        }

    }

I have Write this code to create Gridview with header text and textboxes Dynamically ...By problem can occur...any solution ????