我想在购物车中找到总价。我的“shop-cart.aspx”代码如下,如何在“shop-cart.aspx.cs”页面中找到总价?
<asp:Repeater ID="Repeater1" runat="server" DataSourceID="SqlDataSource1" OnItemDataBound="Repeater1_ItemDataBound">
<ItemTemplate>
<tr>
<td class="text-left"><%#Eval("productname") %></td>
<td class="text-left"><%#Eval("price") %></td>
<td class="product-subtotal text-left"><%#Eval("piece") %></td>
</tr>
</ItemTemplate>
</asp:Repeater>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:aytasarimConnectionString %>" SelectCommand="SELECT * FROM [cart] WHERE ([userid] = @userid)">
<SelectParameters>
<asp:SessionParameter Name="userid" SessionField="userid" Type="Int32" />
</SelectParameters>
</asp:SqlDataSource>
我试过这个但是我得到了null null。
string totalprice;
protected void Repeater1_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
{
totalprice += Convert.ToDecimal(DataBinder.Eval(e.Item.DataItem, "price")) * Convert.ToDecimal(DataBinder.Eval(e.Item.DataItem, "piece"));
LblTotalPrice.Text = totalprice;
}
}
答案 0 :(得分:1)
在ItemDataBound方法之外创建一个变量。然后将每个项目的价格添加到变量中并显示结果。
decimal total = 0;
protected void Repeater1_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
DataRowView item = e.Item.DataItem as DataRowView;
total += Convert.ToDecimal(item["itemid"]);
Label1.Text = string.Format("{0:C}", total);
}