How can I include additional markup within a 'Content' inner property of an ASP.Net WebControl?

Question

I\'ve searched the site and I cannot find a solution for my problem, so apologies if it\'s already been answered (I\'m sure someone must have asked this before).

I h

Answer 1

You should try to use this:

win_StatusFilter.FindControl("btn_Test") // this will be a Control
win_StatusFilter.FindControl("btn_Test") as Button // this will be a Button if control found, otherwise it will be null.

Otherwise you should define some properties for your control, like in this article: http://msdn.microsoft.com/ru-ru/library/36574bf6%28v=VS.90%29.aspx

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Update: According the remarks in this article about ContentTemplate property of the UpdatePanel:

http://msdn.microsoft.com/en-us/library/system.web.ui.updatepanel.contenttemplate(v=VS.90).aspx

you can get controls from ContentTemplate because of TemplateInstanceAttribute value (UpdatePanel.ContentTemplate has the TemplateInstance.Single).

So you should only use this code:

[PersistenceMode(PersistenceMode.InnerProperty)] 
[DesignerSerializationVisibility(DesignerSerializationVisibility.Content)] 
[TemplateInstance(TemplateInstance.Single)]
public ITemplate Content

More information at:

http://msdn.microsoft.com/ru-ru/library/system.web.ui.templateinstanceattribute(v=VS.90).aspx

Answer 2

public ITemplate Content

which then you render to the UI like:

Label label = new Label();
this.Content.InstantiateIn(label);

//Render label

EDIT: Make sure the template also defines

[TemplateInstance(TemplateInstance.Single)]

as this allows you to access the controls within the template directly.