c# - 如何在 C# 中的 gridview 中设置页脚中特定列的总数？

Question

我需要在 gridview 中设置特定列的总数。

我的代码是:

<asp:TemplateField>
     <HeaderTemplate>
         Amount
     </HeaderTemplate>
     <ItemTemplate>
         <asp:Label ID="lblAmt" HeaderText="Amount" runat="server" 
              Text='<%# Eval("Amount")%>' Visible="true">
         </asp:Label>
     </ItemTemplate>
     <FooterTemplate>
         <asp:Label ID="lblTotalAmt" runat="server" />
     </FooterTemplate>
</asp:TemplateField>    

然后:

decimal totProfit = 0M;
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
     if (e.Row.RowType == DataControlRowType.DataRow)
     {
          Label lblAmt = (Label)e.Row.FindControl("lblAmt");
          decimal Profitprice = Decimal.Parse(lblAmt.Text);
          totProfit += Profitprice;
     }
     if (e.Row.RowType == DataControlRowType.Footer)
     {
          Label lblTotalAmt = (Label)e.Row.FindControl("lblTotalAmt");
          lblTotalAmt.Text = totProfit.ToString();
     }
 }     

但是错误是这样的:

Input string was not in a correct format.

Answer 1

MS 在整数转换期间识别出一个错误，可能会在此处发挥作用 (http://support.microsoft.com/kb/942460)

另一种选择是确保它是“金额”字段中的数字。

decimal totProfit = 0M;
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        Label lblAmt = (Label)e.Row.FindControl("lblAmt");
        decimal Profitprice; 
        if (Decimal.TryParse(lblAmt.Text, Profitprice) ) {
             totProfit += Profitprice;
        }
    }
    if (e.Row.RowType == DataControlRowType.Footer)
    {
        Label lblTotalAmt = (Label)e.Row.FindControl("lblTotalAmt");
        lblTotalAmt.Text = totProfit.ToString();
    }
}