im getting an error when fetching data into gridview

Question

i have a gridview with project names with autogenerated select button when select button is selected bellow code is executed

protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
       {

           lblProjectno.Text = GridView1.SelectedRow.Cells[1].Text;

           String s1 = lblProjectno.Text;


           SqlConnection con = new SqlConnection(ppd_Vas);
           con.Open();
           SqlCommand cmd = new SqlCommand("query'", con);

           cmd.Parameters.AddWithValue("@ProjectNo", s1);
           SqlDataAdapter da = new SqlDataAdapter(cmd);


           DataSet ds = new DataSet();

           da.Fill(ds);

           GridView2.DataSource = ds;
           GridView2.DataBind();

           con.Close();

           GridView5_Show();
           DisplayProject();
           Panelprojectdashboard1.Visible = true;
           Bindchart1();
           BindChart2();



       }

 above code generates a gridview after selecting the select button

in above code i have mentioned a function call Gridview5_show()

 

 

code of  Gridview5_show() is bellow

protected void GridView5_Show()
        {
            string s1 = GridView1.SelectedRow.Cells[1].Text;




            SqlConnection con = new SqlConnection(ppd_Vas);
            con.Open();

            SqlCommand cmd = new SqlCommand("query ", con);

            cmd.Parameters.AddWithValue("@ProjectNo", s1);
            SqlDataAdapter da = new SqlDataAdapter(cmd);

            DataSet ds = new DataSet();
            da.Fill(ds);
            GridView5.DataSource = ds;
            GridView5.DataBind();
            con.Close();


        }

  but when im selecting the select button it is showing error at  line 17 da.Fill(ds);

 

error is : Execution Timeout Expired.  The timeout period elapsed prior to completion of the operation or the server is not responding.