سؤال بسيط جدا في سلة المشتريات

protected void add_Click(object sender, EventArgs e)

{

DataTable tb = new DataTable();

DataColumn c1 = new DataColumn();

DataColumn c2 = new DataColumn();

DataColumn c3 = new DataColumn();

DataColumn c4 = new DataColumn();

DataColumn c5 = new DataColumn();

c1.ColumnName = "bookid";

c1.Caption = "bookid";

c1.DataType = Type.GetType("System.String");

c2.ColumnName = "qty";

c2.Caption = "qty";

c2.DataType = Type.GetType("System.String");

c3.ColumnName = "bname";

c3.Caption = "bname";

c3.DataType = Type.GetType("System.String");

c4.ColumnName = "price";

c4.Caption = "price";

c4.DataType = Type.GetType("System.String");

c5.ColumnName = "Total Price";

c5.Caption = "Total Price";

c5.DataType = Type.GetType("System.String");

tb.Columns.Add(c1);

tb.Columns.Add(c2);

tb.Columns.Add(c3);

tb.Columns.Add(c4);

tb.Columns.Add(c5);

DataRow drow;

drow = tb.NewRow();

drow["bookid"] = (Request.QueryString);

drow["qty"] = txtqty.Text;

drow["bname"] = ((Label)DataList1.Items[0].FindControl("lblbname")).Text;

drow["price"] = ((Label)DataList1.Items[0].FindControl("lblprice")).Text;

drow["Total Price"] = System.Convert.ToDouble(txtqty.Text) * System.Convert.ToDouble(((Label)DataList1.Items[0].FindControl("lblprice")).Text);

tb.Rows.Add(drow);

tb.AcceptChanges();

Session["tb"] = tb;

Response.Redirect("shoppingcart.aspx");

}

protected void page_load(object sender, EventArgs e)

{

gv1.DataSource = Session["tb"];

gv1.DataBind();

}