Web Form Render Engine Outputs A Control Tree / Looking For Info On Render Logic.
Feb 12, 2011
I've been watching a video on Scott Hanselmnn teaching MVC 2 tricks/tips. He mentions how MVC 2 by default uses ASP.NET Web Forms view engine to render the output of the views; he mentions that the web forms view engine is a little slower than it could be for MVC 2 since it generates a control tree and then outputs the HTML to the page (I hope I said that right).
I was wondering what he meant by web forms generating a code tree before outputting the HTML to the page. Does anyone have insight on the view engine of Web forms and the steps of the rendering process works for ASP.NET and MVC2?
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End Function
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Exception Details: System.Security.SecurityException: Request for the permission of type 'System.Web.AspNetHostingPermission, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed. Stack Trace:[SecurityException: Request for the permission of type 'System.Web.AspNetHostingPermission, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.]System.Reflection.Assembly._GetType(String name, Boolean throwOnError, Boolean ignoreCase) +0System.Web.UI.NamespaceTagNameToTypeMapper.GetControlType(String tagName, IDictionary attribs, Boolean throwOnError) +209
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Nov 3, 2010
Render User Control with Events in html
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May 12, 2010
i'm just new in ASP.Net.
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Feb 22, 2010
I m new in mvc architecture and i want to bind data in html render control using Dataset .
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Mar 25, 2010
I have come across a requirement to dynamically show or hide asp.net web controls , html server controls. I want to do this through a configuration XML (as it would be easier to config). So each page /aspx will have a configuration xml.
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Some thing like this
aspx -
<Sequencer XmlPath=".." Id="S1" Runat="server">
<Textbox id="t1" runat="server" />
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<Textbox id="t3" runat="server" />
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So in this case t2 should be rendered first then t1. The control id in the xml and the aspx has to be same.
t3 should not be rendered at all on the screen.
Which page load event should I use.
how I can create this kind of a custom control that does the above for me.
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Jan 7, 2010
I have a very simplistic user control that looks like this:
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with this code behind:
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[PersistChildren(true)]
public partial class wfWindow : System.Web.UI.UserControl
{
protected override void Render(HtmlTextWriter writer)
{
RenderChildren(writer);
}
}
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<wf:wfWindow runat="server">This content should go where [x] is.</wf:wfWindow>
I'm no ASP.NET pro, so how do I get the content to render exactly where the [x] appears in my user control?
RenderChildren is rendering my content, but it is only appended to the end of the UserControl output. I need it to go and sit right where [x] marks the spot.
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Nov 17, 2010
I'm working on a custom ServerControl, I've created it like below :
[ParseChildren(true), PersistChildren(true)]
[ToolboxData("<{0}:Menu runat="server"></{0}:Menu>")]
public class Menu : WebControl
{
.....
[DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
[PersistenceMode(PersistenceMode.InnerDefaultProperty)]
public MenuItem MenuItems { get; set; }
}
[ParseChildren(true), PersistChildren(true)]
public class MenuItem : WebControl
{
......
[PersistenceMode(PersistenceMode.InnerProperty)]
public MenuItem SubMenuItems
{
get
{
if (_SubMenuItems == null) return new MenuItem();
return _SubMenuItems;
}
set
{
_SubMenuItems = value;
}
}
private MenuItem _SubMenuItems;
[TemplateContainer(typeof(MenuItem))]
[PersistenceMode(PersistenceMode.InnerProperty)]
public ITemplate Template { get; set; }
}
<%@ Register Assembly="JQueryMenu" Namespace="JQueryMenu" TagPrefix="MdsMenu" %>
<MdsMenu:Menu ID="Menu1" runat="server">
<AnimationItems AnimationSpeed="Fast" AnimationType="Opacity_Height" DropShadow="true"
Delay="1000" />
<MdsMenu:MenuItem ID="MenuItem1" runat="server" Text="MenuItem 01">
<MdsMenu:MenuItem runat="server">
<Template>
<asp:Button ID="Button1" runat="server" Text="Button" />
<asp:CheckBox ID="CheckBox1" runat="server" />
</Template>
</MdsMenu:MenuItem>
</MdsMenu:MenuItem>
<MdsMenu:MenuItem ID="MenuItem2" runat="server" Text="MenuItem 01">
<MdsMenu:MenuItem ID="MenuItem3" runat="server">
<Template>
<asp:Button ID="Button2" runat="server" Text="Button" />
<asp:CheckBox ID="CheckBox2" runat="server" />
</Template>
<MdsMenu:MenuItem ID="MenuItem5" runat="server" Text="MenuItem 05">
</MdsMenu:MenuItem>
<MdsMenu:MenuItem ID="MenuItem6" runat="server" Text="MenuItem 06">
</MdsMenu:MenuItem>
<MdsMenu:MenuItem ID="MenuItem4" runat="server">
<Template>
<asp:Image ID="Image1" runat="server" />
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
</Template>
</MdsMenu:MenuItem>
</MdsMenu:MenuItem>
</MdsMenu:MenuItem>
</MdsMenu:Menu>
Now, How can I Parse it and render it in RenderContent method ? !!!
The following method is always throw the first Exception, it means this.Controls is always empty !!! How can I do it and how I can access to the nested children in RenderControl method ?
public class Menu : WebControl
{
....
public override void RenderControl(HtmlTextWriter output)
{
if (!this.HasControls())
throw new Exception("Controls are empty");
....
}
}
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Dec 9, 2010
As far as I know server controls doesn't have a .aspx file. So I need to load a aspx file in order for it to work like a template for my server control, and render my server control content.
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Mar 15, 2010
I've build a custom WebControl, which has the following structure:
<gws:ModalBox ID="ModalBox1" HeaderText="Title" runat="server">
<Contents>
<asp:Label ID="KeywordLabel" AssociatedControlID="KeywordTextBox" runat="server">Keyword: </asp:Label><br />
<asp:TextBox ID="KeywordTextBox" Text="" runat="server" />
[Code]....
However it seems to render properly, it doesn't work anymore if I add some asp.net labels and input controls inside the property (see above asp.net code). I'll get the HttpException:
Unable to find control with id 'KeywordTextBox' that is associated with the Label 'KeywordLabel'.
Somewhat understandable, because the label appears before the textbox in the controlcollection. However, with default asp.net controls it does work, so why doesn't this work? What am I doing wrong? Is it even possible to have two control collections in one control? Should I render it differently?
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Feb 3, 2011
I am creating a custom control and was wondering if it is possible to render any JavaScript in the head tags of the page it is placed on? I am thinking I would need to use the FindControl method, but am not sure what I need to bind to. I am thinking the page object? Let me know if I am thinking in the right direction or if there is another option.
My only concern with the above mentioned idea is that how do I render all my content while placing some code in the head tags?
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Jan 14, 2011
I've these codes in my DATABASE in other words it's HTML. I tried these stuff:
<div runat="server" id="div1" visible="false">
<asp:Literal ID="literal1" runat="server" Text="" />
</div>
I tried in C# code behind:
div1.InnerText = contents;
div1.InnerHtml = contents
literal1.Text = contents;
But is still doesn't render well. I displays the original values in stead of a table and cells and columns. colours etc. etc....
What am I missing?
All these HTML's are in DABASE.Column e.g. column "Contents"
e.g.
"& lt;p class=& quot;MsoNormal" style= "color: #339966;"><"
;" ;> ;< ;strong > ;&l
ot; > ;& ;nbsp; < ;/span >< ;/p >
I've put (spaces between & and gt above code otherwise it was not showing in stackoverflow.) The HTML sysntaxs are correct because it's created by an HTMLEDITOR.
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