Question

我有ASP.net个C#网络应用有问题。在应用程序上，用户可以输入一些数据并单击＆＃34;添加＆＃34;按钮。这将在屏幕上生成一个网格，其中包含用户刚刚输入的数据。还有一个文本框，用于＆＃34;要求的总金额＆＃34;。在此之下，有一个标签为＆＃34;剩余金额＆＃34;。如果用户在＆＃34;请求的总金额中放入100.00＆＃34;然后将75.00加载到网格中，剩余金额为＆＃34;剩余金额＆＃34;将显示＆＃34; 25.00＆＃34;。这很好用。我在网格中添加了删除行，因此用户可以删除特定的行。这也有效。我在网格中添加了一个_RowDeleted函数，然后插入函数来计算＆＃34;剩余金额＆＃34;。这是问题所在：

当我删除该行时，它会从数据库中删除，没有问题。但是，屏幕上的标签不会刷新。我在代码中停了一下，然后走了过去。该脚本工作，label.text加载了我期望的，但它只是在屏幕上刷新。我尝试了很多不同的东西，但一直在撞墙。任何帮助将不胜感激！

网格：

 <dx:ASPxGridView ID="gridGL1" runat="server" AutoGenerateColumns="False" 
 DataSourceID="sdsGLData" KeyFieldName="GenLedgerID" OnRowDeleted="gridGL1_RowDeleted">
     <Columns>
     <dx:GridViewCommandColumn VisibleIndex="0" Caption=" " ButtonType="Button">
         <DeleteButton Visible="True">
         </DeleteButton>
     </dx:GridViewCommandColumn>
 <dx:GridViewDataTextColumn FieldName="GenLedgerID" Visible="false" VisibleIndex="1">
 </dx:GridViewDataTextColumn>
 <dx:GridViewDataTextColumn FieldName="UnitNumber" VisibleIndex="2">
 </dx:GridViewDataTextColumn>
 <dx:GridViewDataTextColumn FieldName="AccountNumber" VisibleIndex="3">
 </dx:GridViewDataTextColumn>
 <dx:GridViewDataTextColumn FieldName="Amount" VisibleIndex="4">
 </dx:GridViewDataTextColumn>
 </Columns>
 <SettingsBehavior ConfirmDelete="True" />
 </dx:ASPxGridView>

SDS：

 <asp:SqlDataSource ID="sdsGLData" runat="server" 
      ConnectionString="<%$ ConnectionStrings:FEAPConnectionString %>" 
      ProviderName="<%$ ConnectionStrings:FEAPConnectionString.ProviderName %>" 
      SelectCommand="prcRequestGLList" SelectCommandType="StoredProcedure"
      DeleteCommand="delete RequestsGL where GenLedgerID = @GenLedgerID">
      <SelectParameters>
         <asp:Parameter Direction="ReturnValue" Name="RETURN_VALUE" Type="Int32" />
         <asp:ControlParameter ControlID="lblUserID" Name="UserID" PropertyName="Text" 
                    Type="String" />
         <asp:ControlParameter ControlID="txtRequestDate" Name="RequestDate" 
                    PropertyName="Text" Type="DateTime" />
      </SelectParameters>
 </asp:SqlDataSource>

_RowDeleted

protected void gridGL1_RowDeleted(object sender, DevExpress.Web.Data.ASPxDataDeletedEventArgs e)
{
    RemainingTotal();
}

RemainingTotal（）：

protected void RemainingTotal()
{
    TotalGLAmount();

    decimal TotalReq;
    decimal TotalGL;

    // Total Requested Amount
    if (txtTotalAmount.Text == "")
    {
        TotalReq = 0.00M;
    }
    else
    {
        TotalReq = Convert.ToDecimal(txtTotalAmount.Text);
    }

    // Total GL Amount
    if (lblTotalGLAmount.Text == "")
    {
        TotalGL = 0.00M;
    }
    else
    {
        TotalGL = Convert.ToDecimal(lblTotalGLAmount.Text);
    }

    // Total Remaining Amount
    if (TotalReq != TotalGL)
    {

        lblRemainingAmount.Text = Convert.ToString(TotalReq - TotalGL);

        lblTest.Text = Convert.ToString(TotalReq - TotalGL);

        if (TotalReq > TotalGL)
        {
            lblRemainingAmount.ForeColor = Color.Black;
        }
        else if (TotalReq < TotalGL)
        {
            lblRemainingAmount.ForeColor = Color.Red;
        }
    }
    else
    {
        if (txtTotalAmount.Text != "")
        {
            lblRemainingAmount.Text = "<b>EVEN!</b>";
            lblRemainingAmount.ForeColor = Color.Black;

            lblTest.Text = "<b>EVEN!</b>";
        }
        else
        {
            lblRemainingAmount.Text = "0.00";
            lblRemainingAmount.ForeColor = Color.Black;

            lblTest.Text = "0.00";
        }
    }

}

Answer 1

检查这些主题：

The concept of callbacks - Why is it impossible to update external control data during a callback to another control

ASPxGridView - How to update an external control during a callback

RowDelete功能不刷新标签字段

1 个答案: