Accessing an ASP.Net user control

Question

Hey guys,
I've created a CustomFileUpload class which is inherited from the original FileUpload class, I'm gonna have to say it's not actually a UserControl it's a simple class which can be seen below

using System;
using System.Web;

public class CustomFileUpload : System.Web.UI.WebControls.FileUpload
{
    public string Directory { get; set; }
}

I need to know how I can use the control in my page, maybe something like <@Registe ... when we create a usercontrol.

sgriffinusa · Accepted Answer · 2011-01-07 17:34:55Z

This is called a custom server control. You can read an indepth walkthrough about them. You will need to have the server control reside in an assembly that is separate from your project and then reference the assembly into your project.

The syntax you want to use to put the control on the page is:

<%@ Register Assembly="YourAssemblyName" TagPrefix="myControl" Namespace="YourNamespaceName"%>

Then you can reference the control:

<myControl:CustomFileUpload .... />

An easy way to do this is to add the control to your toolbox. Then you can drag the control from the toolbox onto any page. The Register will be created automatically. To add the control to the toolbox

Right click on the toolbox tab where the control should reside, select choose items. (You can create a new tab or use an existing one).
Select Browse
Browse to and select your assembly, click Open
Your control should now appear in the toolbox tab.

Matthew Abbott · Accepted Answer · 2011-01-07 17:35:20Z

1

You can do:

<%@ Register TagPrefix="my" Namespace="My.Namespace" Assembly="MyAssembly" %>

You can also do this at the config level:

<system.web>
  <pages>
    <controls>
      <add tagPrefix="my" namespace="My.Namespace" assembly="MyAssembly" />
    </controls>
  </pages>
</system.web>

Then use in your page:

<my:CustomFileUpload runat="server" ... />

answered Jan 7, 2011 at 17:35

Matthew Abbott

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Comments

Pauli Østerø · Accepted Answer · 2011-01-07 17:36:29Z

1

You need to put your class in a Namespace and register it like this

<%@ Register tagprefix="tagprefix" Namespace="Your Namespace" Assembly="The Assembly" %>

Then you can use the control like this

<tagprefix:CustomFileUpload runat="server" />

http://msdn.microsoft.com/en-us/library/c76dd5k1(v=VS.100).aspx

answered Jan 7, 2011 at 17:36

Pauli Østerø

6,9262 gold badges34 silver badges48 bronze badges

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