Grid view with Datasource control

Sir, Im doing a project in asp.net 4.0 with c#.I my project i want to display datas from the database to the grid view using Data Source Control. But while doing it im getting an eror called "The DataSourceID of 'GridView1' must be the ID of a control of type IDataSource. A control with ID 'System.Web.UI.WebControls.SqlDataSource' could not be found.". My code is also givren below.

SqlCommand cmd = new SqlCommand("SPS_LeaveBalanceReport_DSO", Connect.con());
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.Add("@ReportMonth", SqlDbType.NVarChar).Value =
    SelectMonthDropDown.SelectedValue.ToString();
cmd.Parameters.Add("@ReportYear", SqlDbType.NVarChar).Value =
    SelectYearDropDown.SelectedItem.Text.ToStrin开发者_StackOverflow社区g();            

SqlDataAdapter da = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds, "tab");    

GridView1.DataSourceID = SqlDataSource1.ToString();
GridView1.DataBind();

Please help me with error.,thanks In Advance.,

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change

GridView1.DataSourceID = SqlDataSource1.ToString();

to

GridView1.DataSourceID = SqlDataSource1.ID;

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The problem is no where in your cod ejust replace the line

GridView1.DataSourceID = SqlDataSource1.ToString();

with

GridView1.DataSource=ds;

it will work