C# 在ModalPopupExtender okcontrolid上执行服务器端代码

我正在使用ASP.NET和C。我想弹出这个小屏幕，然后单击OK按钮时，我想根据弹出窗口的输入更新主屏幕。听起来这应该是一件平常的事。是否可能，如果可能，如何实现

    <cc1:modalpopupextender id="ModalPopupExtender1" runat="server" 
cancelcontrolid="btnCancel" okcontrolid="btnOkay" 
targetcontrolid="txtCosCodeExpCode" popupcontrolid="Panel1" 
popupdraghandlecontrolid="PopupHeader" drag="true" 
backgroundcssclass="ModalPopupBG">
    </cc1:modalpopupextender>

    <asp:panel id="Panel1" style="display: none" runat="server">
<div class="CostCentreExpenseCodePopup" style="background-color:White ; border-style :solid;">
            <div class="PopupHeader" id="PopupHeader">Select Cost Centre / Expense Code</div>
            <div class="PopupBody">
                <p>Cost Centre<asp:DropDownList 
                                            ID="ddlCostCentres1" 
                                            runat="server" 
                                            CssClass="SVSComboBox1" 
                                            AppendDataBoundItems ="True"
                                            AutoPostBack="True" 
                                            style = "width :152px;"
                                            OnSelectedIndexChanged="ddlCostCentres1_SelectedIndexChanged">
                                            <asp:ListItem Text="Please select" Value="0"></asp:ListItem>
                                        </asp:DropDownList></p>

                <p>Expense Code <asp:DropDownList ID="ddlExpCode1" runat="server" CssClass="SVSComboBox1" style = "width :152px;"
                                            AppendDataBoundItems ="True" Enabled="False" Visible ="False">
                                            <asp:ListItem Text="Please select" Value="0"></asp:ListItem>
                                        </asp:DropDownList></p>
            </div>
            <div class="Controls">
                <input id="btnOkay" type="button" value="Done" />
                <input id="btnCancel" type="button" value="Cancel" />
    </div>
    </div>

不要设置OkControlID，而是使用ModalPopupExtender1.Hide在服务器端。然后你可以先调用你的更新代码

您还应该使用服务器按钮，而不是和处理它们的单击事件。

首先将asp:按钮添加为“确定”按钮，并在aspx.cs页面中添加单击事件，如下所述：

ASPX：

然后从模式弹出扩展器中删除okcontrolid=btnOkay

<asp:Button runat="server" ID="btnOkay" Text="OK" OnClick="btnOkay_Click"/>

protected void btnOkay_Click(object sender, EventArgs e)
{
    // Code to write on ok click event
}