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[Solved] InvalidOperationExcepton:You cannot call render more than once error.

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answered on 26 Jan 2010, 02:21 PM

    
            <%@ Master Language="C#" Inherits="System.Web.Mvc.ViewMasterPage" %> 
        
            <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> 
        
            <html xmlns="http://www.w3.org/1999/xhtml"> 
        
            <head id="Head1" runat="server"> 
        
                <title> 
        
                    <asp:ContentPlaceHolder ID="TitleContent" runat="server" /> 
        
                </title> 
        
                <%=Html.Telerik().StyleSheetRegistrar() 
        
                    .DefaultGroup(group => group.Add("Styles.css") 
        
                                                .Add("telerik.common.min.css") 
        
                                                .Add("telerik.web20.min.css")) 
        
                %> 
        
            </head> 
        
            <body> 
        
                <div id="page"> 
        
                    <div id="header"> 
        
                        <div id="title"> 
        
                        </div> 
        
                        <div id="logindisplay"> 
        
                            <% Html.RenderPartial("LogOnUserControl"); %> 
        
                        </div> 
        
                    </div> 
        
                    <asp:ContentPlaceHolder ID="MainContent" runat="server" /> 
        
                    <div id="footer"> 
        
                    </div> 
        
                </div> 
        
                <%= Html.Telerik().ScriptRegistrar() %> 
        
                <script type="text/javascript" src="<%= ResolveUrl("~/Scripts/jquery.validate.js")%>"></script> 
        
                <script type="text/javascript" src="<%= ResolveUrl("~/Scripts/Flagship.js")%>"></script> 
        
                <asp:ContentPlaceHolder ID="LocalJavaScriptContent" runat="server" /> 
        
            </body> 
        
            </html>

Ok, so here is my master page. The LogOnUserControl just renders an ActionLink to the page below that contains a Partial view.

    
            <%@ Page Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage" %> 
        
            <asp:Content ID="localJavascript" runat="server" ContentPlaceHolderID="LocalJavaScriptContent"> 
        
            </asp:Content> 
        
            <asp:Content ID="loginTitle" ContentPlaceHolderID="TitleContent" runat="server"> 
        
                Log On 
        
            </asp:Content> 
        
            <asp:Content ID="loginContent" ContentPlaceHolderID="MainContent" runat="server"> 
        
                <h2>Log On</h2> 
        
                <% Html.RenderAction("LogOn", "Account"); %> 
        
            </asp:Content>

Finally, here is the partial:

    
            <%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl" %> 
        
                <div> 
        
                <% if (TempData["HasError"] != null && (bool)TempData["HasError"] == true) 
        
                   {%> 
        
                <DIV class=validation-summary-errors> 
        
                <UL><LI>The username or password is incorrect</LI></UL></DIV> 
        
                <% }%> 
        
                <%  
        
                using (Html.BeginForm("LogOn", "Account", FormMethod.Post)) 
        
                   { %> 
        
                    <div> 
        
                        <p>Username <%= Html.TextBox("username")%></p> 
        
                        <p>Password <%= Html.Password("password")%></p> 
        
                        <p><input type="submit" value="Log On" /> 
        
                            <%=Html.ActionLink("Forgot Password?", "ForgotPassword", "Account")%> 
        
                        </p> 
        
                    </div> 
        
                <% } %> 
        
            </div>

The error occurs when using the actionlink from the master (or any where for that matter).

Accepted