Jquery 在updatepanel中显示/隐藏ModalPopupXtender

我有一个带有ajax updatepanel和网格的asp.net页面。在同一个updatepanel中，我有一个ModalPopupXtender。我想在单击网格的“行”按钮时显示ModalPopupXtender

我写了这个js：

function AddRemoveFavorites(regId) {

            Showpopup();
            return false;
        }

        function Hidepopup() {
            $find('ModalPopupExtender1').hide();
        }
        //Function to Show ModalPopUp
        function Showpopup() {
            $find('ModalPopupExtender1').show();
        }

这里是更新面板、modalpopup和gridview按钮列的标记

<asp:UpdatePanel ID="ResultUpdatePanel" runat="server" UpdateMode="Conditional">
            <Triggers>
                <asp:AsyncPostBackTrigger ControlID="SearchLinkButton" EventName="Click" />
                <asp:AsyncPostBackTrigger ControlID="SubmitButton" EventName="Click" />
            </Triggers>
            <ContentTemplate>
                <asp:Button ID="Button1" runat="server" Text="Button" />
                <ajax:ModalPopupExtender ID="ModalPopupExtender1" runat="server" CancelControlID="btnCancel"
                    OkControlID="btnOkay" TargetControlID="Button1" PopupControlID="Panel1" PopupDragHandleControlID="PopupHeader"
                    Drag="true" BackgroundCssClass="ModalPopupBG">
                </ajax:ModalPopupExtender>
                <asp:Panel ID="Panel1" Style="display: none" runat="server">
                    <div class="HellowWorldPopup">
                        <div class="PopupHeader" id="PopupHeader">
                            Header</div>
                        <div class="PopupBody">
                            <p>
                                This is a simple modal dialog</p>
                        </div>
                        <div class="Controls">
                            <input id="btnOkay" type="button" value="Done" />
                            <input id="btnCancel" type="button" value="Cancel" />
                        </div>
                    </div>
                </asp:Panel>

我在这里找到了答案：

---

希望它能在某个时候帮助某人

我想你已经解决了这个问题

我认为您缺少的是ModalPopupExtender上的BehaviorID=“mpe”，然后在javascript中使用$find（'mpe'）.show（）

 <asp:TemplateField HeaderStyle-CssClass="gridTitleCor2" ItemStyle-CssClass="GridBorderR"
                            ItemStyle-Wrap="false">
                            <ItemTemplate>
                                <asp:PlaceHolder ID="SavedPH" runat="server" Visible='<%# Eval("IsSaved").ToString() == "1" %>'>
                                    <a href='#' onclick='AddRemoveFavorites(<%# Eval("RegistrantID").ToString() %>); return false;'
                                        title="<%= Resources.UserProfile.C_SerRes_RemoveFavorites %>">
                                        <img id='<%# String.Format("StatusImage_{0}", Eval("RegistrantID").ToString()) %>'
                                            src="/Images/StarYellow.png" />
                                    </a></asp:PlaceHolder>
                                <asp:PlaceHolder ID="NotSavedPH" runat="server" Visible='<%# Eval("IsSaved").ToString() == "0" %>'>
                                    <a href='#' onclick='AddRemoveFavorites(<%# Eval("RegistrantID").ToString() %>); return false;'
                                        title="<%= Resources.UserProfile.C_SerRes_AddFavorites %>">
                                        <img id='<%# String.Format("StatusImage_{0}", Eval("RegistrantID").ToString()) %>'
                                            src="/Images/StarGrey.png" />
                                    </a></asp:PlaceHolder>
                            </ItemTemplate>
                        </asp:TemplateField>

Uncaught TypeError: Cannot call method 'show' of null