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Load user control dynamically

Posted on 2008-10-02
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Last Modified: 2012-05-05
I have a master page and a user control. User Control is resgistered on xyz.aspx page. URL rewriting loads xyz.aspx page which in turn loads the UC which shows up on the page/masterpage.

UC builds a side menu.
I added 2 links to my master page. When clicking..i want to call the routine inside the usercontrol to refresh the side menu. Anyway to do this??
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Question by:Camillia
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Accepted Solution

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RishadanPort earned 2000 total points
ID: 22628132
First I want to say that I do not know much about "aspx"

I do however have a lot of experience with C# UserControls.

In C# I would simply wrap a routine in a class that inherits a UserControl, and modify the designing like I want it. Here is an example of a class UserControl

public class XYZ_ASPX_PAGE : UserControl
{
   public XYZ_ASPX_PAGE(){
      InitializeComponent();
   }

   public void refreshSideMenu(){
      ....
   }
}


Outside this class I would simply do something like this:

XYZ_ASPX_PAGE page = new XYZ_ASPX_PAGE();

and to add the page to my Main Page, I would do this:

this.masterPage.Controls.Add(page);


I hope this helps
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Expert Comment

by:RishadanPort
ID: 22628153
Oh and, once you do this, you can simply do:

this.XYZ_ASPX_PAGE.refreshSideMenu();

to refresh the Side Menu
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Author Comment

by:Camillia
ID: 22628327
No, doesnt make sense to me.

1.I have the linkbuttons on a Masterpage:
public partial class MasterPages_Universal : System.Web.UI.MasterPage

So i cant inherit from the UserControl

2. That "refreshsidemenu" is supposed to be in the userContol..right?

3. I did this in click event of the linkbuttons:
   Control FeaturedProductUserControl = LoadControl("~/Controls/ProductFilter.ascx");
  Controls.Add(FeaturedProductUserControl);

This calls my userControl but it doesnt call the "refreshsidemenu"  routine. Anyway to do that?

4. Do you know how I can refresh the entire page when the linkbutton is clicked (maybe this would be easier than loading ONE usercontrol..load the entire page instead of one user control)
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LVL 6

Expert Comment

by:RishadanPort
ID: 22628444
I see what your saying now, MasterPage's Control property can not add in System.Windows.Forms.UserControls... What it does add in is Web.UI.Control. Let me research this topic for a while
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LVL 7

Author Comment

by:Camillia
ID: 22628496
there has to be somehow dynamically calling this:

I made the UC rotuine public..i tried this:
 Control FeaturedProductUserControl = LoadControl("~/Controls/ProductFilter.ascx");
            Controls.Add(FeaturedProductUserControl);
  FeaturedProductUserControl.<i dont see the rotuine here>

*** I thought about reloading the entire page but there are so many user controls and pieces to this and they're all separate...
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LVL 6

Expert Comment

by:RishadanPort
ID: 22628513
Well you can't see the routine since you are dealing with the Object Control.

You need to type cast it to a higher level object in order to see the routines
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LVL 7

Author Comment

by:Camillia
ID: 22628530
not sure what you mean...can u give an example...

Also...can this be done with event handeling...do i need an event handler???
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LVL 6

Expert Comment

by:RishadanPort
ID: 22628617
What my book says on this is the following:

1. You need to create a wrapper class that inherits System.Web.UI.Control
-->Here you provide properties, methods, and events.
2. You need to Override the Renderer Method
-->"Each control must implement this method to generate the HTML that represents the control to the browser. Note that the render method is not called directly; instead, a call is made to RenderControl, which then invokes Render. For controls that contain child controls, the RenderChildren method is available."
3. Use HtmlTextWriter object to generate the HTML Code


I am not sure if this helps you... Sorry I am trying my best
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LVL 6

Expert Comment

by:RishadanPort
ID: 22628679
Here is the example that my book uses:
//(1) In herit from the System.Web.UI.Control Class
public class CompanyLogo : System.Web.UI
{
   ... List properties and methods here ...
 
   //(2) Override the Render Method
   protected override void Render(HtmlTextWriter output)
   {
      //(3) Use the HtmlTextWriter to emit html to the browser
   }
}

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LVL 7

Author Comment

by:Camillia
ID: 22629578
let me see, thanks .
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