获取asp.net中完整的gridview列

Question

我正在使用asp.net网格视图，我有一列，即Calories，我想在顶部显示整个caloreis总数。我使用了以下代码：

            int count = grdViewSample.Rows.Count;
            double totCalories = 0;
            Label lblCalories = new Label();


            foreach (GridViewRow row in grdViewSample.Rows)
            {
                lblCalories = (Label)row.FindControl("lblCalories");
                totCalories = totCalories + Convert.ToDouble(lblCalories.Text);

            }
            lblTotalCaloreis.Text = lblTotalCaloreis.Text + " " + totCalories;

我的问题是通过分页改变了卡路里总量，我想要在网格视图中可用的总卡路里。 感谢

Answer 1

Instated of using 
grid view row property retrive no of rows from the data set directly because row property changes with the paging

     foreach (DataRow row in dsFood.Tables[0].Rows)
                        {
                            totCal += Convert.ToDouble(row["calories"]);
                        }
                        lblCalories.Text = " " + totCal;