Javascript 来自代码隐藏的文本赢得'；t在ModalPopupXtender标签中显示

在过去的几个小时里，我阅读了所有的文章，试图在ModalPopupXtender中包含的标签中显示动态标签文本，但没有成功。标记代码中的标签文本起作用，但我不能从代码隐藏中引入任何内容。建议包括从更新面板到JavaScript的所有内容。也许我会认为我的ModalPopupXtender被诅咒了；请帮我解除诅咒。代码：

<style type="text/css">
        .modalBackground
        {
            background-color: Gray;
            filter: alpha(opacity=70);
            opacity: 0.7;
        }
        .modalPopup
        {
            background-color: #ffffdd;
            border-width: 3px;
            border-style: solid;
            border-color: Gray;
            padding: 3px;
            width: 250px;
        }
    </style>


<script type="text/javascript">
    function ShowModalPopup() { var modal = $find("<%= mpeNewInviteSuccess.ClientID %>"); modal.show(); }
</script>



    <%--success popup items--%>
    <div style="display: none;">
        <asp:Button ID="btnDummy" OnClick="btnDummy_Click" OnClientClick="ShowModalPopup" UseSubmitBehavior="true" runat="server" /></div>
            <div id="divNewInviteSuccess" class="modalPopup" runat="server">
                <div>
                    <asp:Label ID="lblNewInviteSuccess" runat="server" /></div>
                <br />
                <div><asp:Button ID="btnNewInviteReturn" Text="OK" CssClass="button" OnClientClick="return HideModalPopup()" runat="server" /></div>
            </div>
    <act:ModalPopupExtender ID="mpeNewInviteSuccess" TargetControlID="btnDummy" BackgroundCssClass="modalBackground"
        PopupControlID="divNewInviteSuccess" DropShadow="true" BehaviorID="mpe" runat="server" />



    protected void btnDummy_Click(object sender, EventArgs e)
    {
        mpeNewInviteSuccess.Show();
        //create object of button from sender
        Button button = sender as Button;

        //get command argument
        string cmdArgument = button.CommandArgument;

        //split command argument based on comma separator and convert to a list
        List<string> lstPassedValues = new List<string>(cmdArgument.Split(','));

        //ListView lsv = Helpers.FindChild(Page, "lsvNewInvite") as ListView;

        //create successful message from list
        string SuccessMsg = "Success! Your invitation was sent to " + lstPassedValues[0] + " " + lstPassedValues[1] + " (" + lstPassedValues[2] + ").";
        lblNewInviteSuccess.Text = SuccessMsg;
        mpeNewInviteSuccess.Show();
    }


    protected void lsvNewInvite_ItemCommand(object sender, ListViewCommandEventArgs e)
    {
        if (e.CommandName == "Insert")
        {
            //place cursor in txtFirstName
            var lsv = Helpers.FindChild(this, "lsvNewInvite") as ListView;
            TextBox txt = Helpers.FindChild(lsv, "txtFriendFirstName") as TextBox;
            if (txt != null)
                txt.Focus();

            //set up parameter values
            ListViewItem item = e.Item as ListViewItem;
            var userInfoList = UserInfo.UserInfoGetByUserID(UserID);
            UserInformation = userInfoList.FirstOrDefault();
            var user = UserInformation.UserID;
            string firstName = (item.FindControl("txtFriendFirstName") as TextBox).Text.ToString();
            string lastName = (item.FindControl("txtFriendLastName") as TextBox).Text.ToString();
            string eMail = (item.FindControl("txtFriendEmail") as TextBox).Text.ToString();

            try
            {
                //code to be inserted into DB
                srcNewInvite.InsertParameters["FriendID"].DefaultValue = "0";
                srcNewInvite.InsertParameters["User"].DefaultValue = user.ToString();
                srcNewInvite.InsertParameters["FirstName"].DefaultValue = firstName;
                srcNewInvite.InsertParameters["LastName"].DefaultValue = lastName;
                srcNewInvite.InsertParameters["Email"].DefaultValue = eMail;
                srcNewInvite.InsertParameters["Date"].DefaultValue = DateTime.Now.ToString();
            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                EmailNewInvitee(firstName, lastName, eMail);

                //concatenate these values and make it as a comma-separated string
                string concatenatedValue = firstName + "," + lastName + "," + eMail;
                btnDummy.CommandArgument = concatenatedValue;
                //show success message by programatically "clicking" hidden button
                //trigger the button click event
                btnDummy_Click(this.btnDummy, e);
                pnlMain.Visible = false;
            }
        }

    }

莫达尔巴基德先生
{
背景颜色：灰色；
过滤器：α（不透明度=70）；
不透明度：0.7；
}
莫达尔波普先生
{
背景色：#ffffdd；
边框宽度：3倍；
边框样式：实心；
边框颜色：灰色；
填充：3倍；
宽度：250px；
}
函数showmodalpoup（）{var modal=$find（“”；modal.show（）；}


受保护的无效BTNDUMY_单击（对象发送者，事件参数e）
{
mpeNewInviteSuccess.Show（）；
//从发件人创建按钮的对象
按钮按钮=发送器为按钮；
//获取命令参数
字符串cmdArgument=button.CommandArgument；
//基于逗号分隔符拆分命令参数并转换为列表
List lstPassedValues=新列表（cmdArgument.Split（'，'）；
//ListView lsv=Helpers.FindChild（第页，“lsvNewInvite”）作为ListView；
//从列表创建成功消息
string successsg=“成功！您的邀请已发送到“+lstPassedValues[0]+”“+lstPassedValues[1]+”（“+lstPassedValues[2]+”）；
lblNewInviteSuccess.Text=successsg；
mpeNewInviteSuccess.Show（）；
}
受保护的void lsvNewInvite_ItemCommand（对象发送方，ListViewCommandEventArgs e）
{
如果（如CommandName==“插入”）
{
//将光标放在txtFirstName中
var lsv=Helpers.FindChild（这是“lsvNewInvite”）作为ListView；
TextBox txt=Helpers.FindChild（lsv，“txtFriendFirstName”）作为TextBox；
如果（txt！=null）
txt.Focus（）；
//设置参数值
ListViewItem item=e.项目作为ListViewItem；
var userInfoList=UserInfo.UserInfoGetByUserID（UserID）；
UserInformation=userInfoList.FirstOrDefault（）；
var user=UserInformation.UserID；
字符串firstName=（item.FindControl（“txtFriendFirstName”）作为文本框）；
字符串lastName=（item.FindControl（“txtFriendLastName”）作为文本框）；
字符串eMail=（item.FindControl（“txtFriendEmail”）作为TextBox.Text.ToString（）；
尝试
{
//要插入数据库的代码
srcNewInvite.InsertParameters[“FriendID”].DefaultValue=“0”；
srcNewInvite.InsertParameters[“User”].DefaultValue=User.ToString（）；
srcNewInvite.InsertParameters[“FirstName”]。DefaultValue=FirstName；
srcNewInvite.InsertParameters[“LastName”]。DefaultValue=LastName；
srcNewInvite.InsertParameters[“Email”].DefaultValue=Email；
srcNewInvite.InsertParameters[“Date”].DefaultValue=DateTime.Now.ToString（）；
}
捕获（例外情况除外）
{
掷骰子；
}
最后
{
EmailNewInvitee（名字、姓氏、电子邮件）；
//连接这些值并使其成为逗号分隔的字符串
字符串concatenatedValue=firstName+“，“+lastName+”，“+eMail；
btnDummy.CommandArgument=concatenatedValue；
//通过编程方式“单击”隐藏按钮显示成功消息
//触发按钮点击事件
btnDummy\u单击（this.btnDummy，e）；
pnlMain.Visible=false；
}
}
}

在“Brand X”网站（好的，forums.asp.net）上的一位好心人的帮助下，我解决了这个问题，如下代码所示。主要的答案是使用UpdatePanel。我以前使用过UpdatePanel，但没有成功，所以我不确定这次是什么造成了不同

<asp:UpdatePanel ID="udpModalSuccess" runat="server">
<ContentTemplate>
    <%--success popup items--%>
    <div style="display: none;">
        <asp:Button ID="btnDummy" UseSubmitBehavior="true" OnClientClick="ShowModalPopup" OnClick="btnDummy_Click" runat="server" />
        <%--Dummy Button added to assign the target controlid of PopupExtender--%>
        <asp:Button ID="btnDummyButton" UseSubmitBehavior="true" runat="server" Text="DummyButton" Style="display: none;" />
    </div>
    <asp:Panel ID="pnlNewInviteSuccess" class="modalPopup" runat="server">
        <div><asp:Label ID="lblNewInviteSuccess" runat="server" /></div>
        <br />
        <div><asp:Button ID="btnNewInviteReturn" Text="OK" CssClass="button" runat="server" /></div>
    </asp:Panel>
    <%--Here I have changed the TargetControlID property--%>
    <act:ModalPopupExtender ID="mpeNewInviteSuccess" TargetControlID="btnDummyButton" CancelControlID="btnNewInviteReturn"
        BackgroundCssClass="modalBackground" PopupControlID="pnlNewInviteSuccess" DropShadow="true"
        BehaviorID="mpe" runat="server">
    </act:ModalPopupExtender>
</ContentTemplate>
</asp:UpdatePanel>



<style type="text/css">
    .modalBackground
        {background-color: Gray; filter: alpha(opacity=70); opacity: 0.7;}
    .modalPopup
        {background-color: #ffffdd; border-width: 3px; border-style: solid; border-color: Gray; padding: 3px; width: 450px;}
</style>



    protected void lsvNewInvite_ItemCommand(Object sender, ListViewCommandEventArgs e)
    {
        if (e.CommandName == "Insert")
        {
            //place cursor in txtFirstName
            var lsv = Helpers.FindChild(this, "lsvNewInvite") as ListView;
            TextBox txt = Helpers.FindChild(lsv, "txtFriendFirstName") as TextBox;
            if (txt != null)
                txt.Focus();

            //set up parameter values
            ListViewItem item = e.Item as ListViewItem;
            var userInfoList = UserInfo.UserInfoGetByUserID(UserID);
            UserInformation = userInfoList.FirstOrDefault();
            var user = UserInformation.UserID;
            string firstName = (item.FindControl("txtFriendFirstName") as TextBox).Text.ToString();
            string lastName = (item.FindControl("txtFriendLastName") as TextBox).Text.ToString();
            string eMail = (item.FindControl("txtFriendEmail") as TextBox).Text.ToString();

            try
            {
                //code to be inserted into DB
                srcNewInvite.InsertParameters["FriendID"].DefaultValue = "0";
                srcNewInvite.InsertParameters["User"].DefaultValue = user.ToString();
                srcNewInvite.InsertParameters["FirstName"].DefaultValue = firstName;
                srcNewInvite.InsertParameters["LastName"].DefaultValue = lastName;
                srcNewInvite.InsertParameters["Email"].DefaultValue = eMail;
                srcNewInvite.InsertParameters["Date"].DefaultValue = DateTime.Now.ToString();
            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                EmailNewInvitee(firstName, lastName, eMail);

                //concatenate these values and make them as a comma-separated string
                string concatenatedValue = firstName + "," + lastName + "," + eMail;
                btnDummy.CommandArgument = concatenatedValue;
                //show success message by programatically "clicking" hidden button
                //trigger the button click event
                btnDummy_Click(this.btnDummy, e);
                pnlMain.Visible = false;
                pnlNewInviteSuccess.Visible = true;
            }
        }
    }

    protected void btnDummy_Click(Object sender, EventArgs e)
{
        //mpeNewInviteSuccess.Show();
        //create object of button from sender
         Button button = sender as Button;

        //get command argument
        string cmdArgument = button.CommandArgument;

        //split command argument based on comma separator and convert to a list
         List<string> lstPassedValues = new List<string>(cmdArgument.Split(','));

        ListView lsv = Helpers.FindChild(Page, "lsvNewInvite") as ListView;

        //create successful message from list
        string SuccessMsg = "Success! Your invitation was sent to:<br><b>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;" + lstPassedValues[0] + " " + lstPassedValues[1] + " (" + lstPassedValues[2] + "</b>)";
        lblNewInviteSuccess.Text = SuccessMsg;
        //assign TargetControl id of ModalPopUpExtender to btnDummy
        mpeNewInviteSuccess.TargetControlID = "btnDummy";
        //show ModalPopup Extender
        mpeNewInviteSuccess.Show();
    }

莫达尔巴基德先生
{背景色：灰色；过滤器：alpha（不透明度=70）；不透明度：0.7；}
莫达尔波普先生
{背景色：#ffffdd；边框宽度：3px；边框样式：纯色；边框颜色：灰色；填充：3px；宽度：450px；}
受保护的void lsvNewInvite_ItemCommand（对象发送方，ListViewCommandEventArgs e）
{
如果（如CommandName==“插入”）
{
//将光标放在txtFirstName中
var lsv=Helpers.FindChild（这是“lsvNewInvite”）作为ListView；
TextBox txt=Helpers.FindChild（lsv，“txtFriendFirstName”）作为TextBox；
如果（txt！=null）
txt.Focus（）；
//设置参数值
ListViewItem item=e.项目作为ListViewItem；
var userInfoList=UserInfo.UserInfoGetByUserID（UserID）；
UserInformation=userInfoList.FirstOrDefault（）；
var user=UserInformation.UserID；
字符串firstName=（item.FindControl（“txtFriendFirstName”）作为文本框）；
字符串lastName=（item.FindControl（“txtFriendLastName”）作为文本框）；
字符串eMail=（item.FindControl（“txtFriendEmail”）作为TextBox.Text.ToString（）；
尝试
{
//要插入数据库的代码
srcNewInvite.InsertParameters[“FriendID”].DefaultValue=“0”；
srcNewInvite.InsertParameters[“User”].DefaultValue=User.ToString（）；
srcNewInvite.InsertParameters[“FirstName”].DefaultValue=f