从gridview行命令设置更新面板中的文本框文本

我试图从gridview的行命令更新更新面板内的文本框的值，也在更新面板内。行命令正在触发更新面板并运行OnRowCommand代码，但是文本框的值根本没有被更新。

我没有得到任何错误，并且我已经检查了我不是简单地通过跟踪我提供值的类的值来输入空白字符串。

下面是我的代码:

ASPX

<asp:Panel ID="pnlInspectorExpenses" CssClass="expenses" runat="server" Visible="false">
    <asp:HiddenField ID="hdnInsExpID" runat="server" />
    <asp:UpdatePanel ID="uPnlInspectorExpenses" runat="server">
        <ContentTemplate>
            <table>
                <tr>
                    <td class="tableHead tableItem">IMO Number:</td>
                    <td class="tableField"><asp:Label ID="lblExpensesIMO" runat="server" /></td>
                    <td></td>
                </tr>
                <tr>
                    <td class="tableHead tableItem">Port of Vessel:</td>
                    <td class="tableField"><asp:Label ID="lblExensesPort" runat="server" /></td>
                    <td></td>
                </tr>
                <%--<tr>
                    <td class="tableHead tableItem">Report No.:</td>
                    <td class="tableField"><asp:Label ID="lblExpensesReportNo" runat="server" /></td>
                    <td></td>
                </tr>--%>
                <tr>
                    <td class="tableHead tableItem">Client Reference:</td>
                    <td class="tableField"><asp:Label ID="lblExpensesClientRef" runat="server" /></td>
                    <td></td>
                </tr>
                <tr>
                    <td class="tableHead tableItem">Vessel Type:</td>
                    <td class="tableField"><asp:Label ID="lblExpensesVesselType" runat="server" /></td>
                    <td></td>
                </tr>
            </table>
            <table class="tableClass">
                <tr>
                    <th align="left">Date</th>
                    <th align="left">Expense Description</th>
                    <th align="left">Type</th>
                    <th align="left">Currency</th>
                    <th align="right">Foreign Cost</th>
                    <th align="right">Exch. Rate</th>
                    <th align="right">GBP</th>
                    <th align="left">Receipt No</th>
                    <th colspan="2"></th>
                </tr>
                <tr>
                    <td colspan="10" class="zeroPadding">
                        <asp:GridView ID="grdInspectorExpenses" runat="server" CssClass="tableClass zeroMargin zeroBorder" DataKeyNames="ExpID" AutoGenerateColumns="false" 
                            OnRowCommand="grdInspectorExpenses_RowCommand">
                            <Columns>
                                <asp:BoundField DataField="ExpDate" HeaderStyle-CssClass="invisible" ItemStyle-HorizontalAlign="Left" DataFormatString="{0:d}" ItemStyle-Width="90px"  />
                                <asp:BoundField DataField="ExpDescription" HeaderStyle-CssClass="invisible" ItemStyle-HorizontalAlign="Left" ItemStyle-Width="220px" />
                                <asp:BoundField DataField="ExpType" HeaderStyle-CssClass="invisible" ItemStyle-HorizontalAlign="Left" ItemStyle-Width="100px" />
                                <asp:BoundField DataField="ExpCurrency" HeaderStyle-CssClass="invisible" ItemStyle-HorizontalAlign="Left" ItemStyle-Width="75px" />
                                <asp:BoundField DataField="ExpForeignCost" HeaderStyle-CssClass="invisible" ItemStyle-HorizontalAlign="Right" ItemStyle-Width="75px" />
                                <asp:BoundField DataField="ExpExchangeRate" HeaderStyle-CssClass="invisible" ItemStyle-HorizontalAlign="Right" ItemStyle-Width="80px" />
                                <asp:BoundField DataField="ExpLocalCost" HeaderStyle-CssClass="invisible" ItemStyle-HorizontalAlign="Right" ItemStyle-Width="80px" />
                                <asp:BoundField DataField="ExpReceiptNo" HeaderStyle-CssClass="invisible" ItemStyle-HorizontalAlign="Left" ItemStyle-Width="80px" />
                                <asp:TemplateField HeaderStyle-CssClass="invisible" ItemStyle-HorizontalAlign="Center" ItemStyle-Width="30px">
                                    <ItemTemplate>
                                        <asp:LinkButton ID="btnEditExpense" runat="server" Text="Edit" CommandName="Edit" CommandArgument="<%# Container.DataItemIndex %>"  />
                                    </ItemTemplate>
                                </asp:TemplateField>
                                <asp:TemplateField HeaderStyle-CssClass="invisible" ItemStyle-HorizontalAlign="Center">
                                    <ItemTemplate>
                                        <asp:LinkButton ID="btnDeleteExpense" runat="server" Text="Delete" OnClientClick="javascript: if (!confirm('Are you sure you want delete?')) return false;" 
                                            CommandName="Delete" CommandArgument="<%# Container.DataItemIndex %>" />
                                    </ItemTemplate>
                                </asp:TemplateField>
                            </Columns>
                            <EmptyDataTemplate>
                                No expenses have yet been added
                            </EmptyDataTemplate>
                        </asp:GridView>
                    </td>
                </tr>
                <tr>
                    <td><asp:TextBox ID="txtInsExpDate" CssClass="datepicker" runat="server" Width="88px" style="padding: 5px 0px;" /></td>
                    <td><asp:TextBox ID="txtInsExpDesc" runat="server" Width="218px" style="padding: 5px 0;" /></td>
                    <td>
                        <asp:DropDownList ID="ddlExpenseType" runat="server" style="width:100px; padding: 4px 0;">
                            <asp:ListItem Text="General" Value="General" />
                            <asp:ListItem Text="Accommodation" Value="Accommodation" />
                            <asp:ListItem Text="Flight" Value="Flight" />
                        </asp:DropDownList>
                    </td>
                    <td><asp:TextBox ID="txtInsExpCurrency" runat="server" Width="68px" style="padding: 5px 0;" /></td>
                    <td><asp:TextBox ID="txtInsExpForVal" runat="server" Width="78px" style="text-align: right; padding: 5px 0;" /></td>
                    <td><asp:TextBox ID="txtInsExpExcRate" runat="server" Width="78px" style="text-align: right; padding: 5px 0;" /></td>
                    <td><asp:TextBox ID="txtInsExpLocVal" runat="server" Width="78px" style="text-align: right; padding: 5px 0;" /></td>
                    <td><asp:TextBox ID="txtInsExpRecNo" runat="server" Width="78px" style="padding: 5px 0;" /></td>
                    <td colspan="2" style="width:100px"></td>
                </tr>
            </table>
        </ContentTemplate>
    </asp:UpdatePanel>
    <asp:UpdateProgress ID="UpdateProgress5" runat="server" DynamicLayout="true">
        <ProgressTemplate>
            <div class="overlay" >
                <img src="/Portals/_default/Skins/PMIT/Images/radarLoading.gif" />
            </div>
        </ProgressTemplate>
    </asp:UpdateProgress>
</asp:Panel>

ASPX.CS

protected void grdInspectorExpenses_RowCommand(object sender, GridViewCommandEventArgs e)
    {
        Trace.Warn("0");
        if (e.CommandName == "Edit")
        {
            Trace.Warn("1");
            int rowIndex = int.Parse(e.CommandArgument.ToString());
            int ExpID = int.Parse(grdInspectorExpenses.DataKeys[rowIndex].Values[0].ToString());
            hdnInsExpID.Value = ExpID.ToString();
            List<ExpenseInfo> Expenses = IC.ExpenseSelect(ExpID);
            ExpenseInfo Expense = Expenses[0];
            txtInsExpDate.Text = Expense.ExpDate.ToString();
            txtInsExpDesc.Text = Expense.ExpDescription;
            ddlExpenseType.Items.FindByValue(Expense.ExpType).Selected = true;
            txtInsExpCurrency.Text = Expense.ExpCurrency;
            txtInsExpForVal.Text = Expense.ExpForeignCost.ToString();
            txtInsExpExcRate.Text = Expense.ExpExchangeRate.ToString();
            txtInsExpLocVal.Text = Expense.ExpLocalCost.ToString();
            txtInsExpRecNo.Text = Expense.ExpReceiptNo;
            Trace.Warn(Expense.ExpReceiptNo);
        }
        else if (e.CommandName == "Delete")
        {
        }
    }