页面范例2 - 嵌套化的购物车

protected void ProductCategoryGridView_RowCommand(
object sender, GridViewCommandEventArgs e)
{
if (e.CommandName == "ShowSummary")
{
GridView myProductCategoryGridView = (GridView)(sender);
for (int i = 0; i < myProductCategoryGridView.Rows.Count; i++)
{
if (myProductCategoryGridView.Rows[i].Cells[0].Text ==
e.CommandArgument.ToString())
{
GridView myProductShopGridView = (GridView)(
myProductCategoryGridView.Rows[i].FindControl("ProductShopGridView"));
Label mylblSummary = (Label)(
myProductCategoryGridView.Rows[i].FindControl("lblSummary"));
StringBuilder sb = new StringBuilder();
sb.Append("<font color=’#FF0000’><b>" +
myProductCategoryGridView.Rows[i].Cells[1].Text +
"类" + "</b></font>" + "的产品订单：<br/>");
foreach (GridViewRow row in myProductShopGridView.Rows)
{
if (row.RowType == DataControlRowType.DataRow)
{
Label lblQuantity = (Label)(row.FindControl("lblQuantity"));
int currentQuantity = Int32.Parse(lblQuantity.Text);
sb.Append(row.Cells[0].Text + " : " + currentQuantity + "<br/>");
}
}
mylblSummary.Text = sb.ToString();
break;
}
}
}
}
protected void ProductCategoryGridView_RowDataBound(
object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
SqlDataSource s = (SqlDataSource)(e.Row.FindControl("ProductsDataSource"));
DataRowView r = (DataRowView)(e.Row.DataItem);
s.SelectParameters["CategoryID"].DefaultValue = r["类别编号"].ToString();
}
}
protected void DecreaseQuantity_Click(object sender, EventArgs e)
{
ChangeQuantity((Button)(sender), -1);
}
protected void IncreaseQuantity_Click(object sender, EventArgs e)
{
ChangeQuantity((Button)(sender), 1);
}
private void ChangeQuantity(Button Sender, int delta)
{
Label lblQuantity = (Label)(Sender.FindControl("lblQuantity"));
int currentQuantity = Int32.Parse(lblQuantity.Text);
currentQuantity = Math.Max(0, currentQuantity + delta);
lblQuantity.Text =
currentQuantity.ToString(System.Globalization.CultureInfo.InvariantCulture);
}