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Re: How can i to call a public method of page from user control?

DEMO — Mon, 22 Jun 2009 07:12:09 GMT

Hello all.I have a problem when i try to compile i get an error which says that i didn’t t inherits user control .Abstract class i inherits as you wrote with System.Web.UI.Page . Whan i tryed to change to user control i got error here AbstractClass page = (AbstractClass)Page;int iResult = page.DoSomething();

so how can i inherits user control and page base class to Abstract user control

Re: How can i to call a public method of page from user control?

Leyu — Thu, 07 Aug 2008 07:25:50 GMT

If you are using the UserControl from one page only this is not much of a problem because you can call the Methods of the Page

by directly casting them to the Page in which you are going to the UserControl

public partial class UserControl_WebUserControlA : System.Web.UI.UserControl
{
    protected void Page_Load(object sender, EventArgs e)
    {
	MySpecificPage page = (MySpecificPage)Page;
	page.BindData();
	page.BindData2();

	// Any other method defined in the specific page...  
    }
}
If your intention is to use the UserControl in multiple pages I favor using the Contracts defined by Interfaces implemented by different classes
and you can throw NotImplementedException() for some of the methods which a specific Page might not implement or you can defined multiple Interfaces
of which the UserControl is aware of and do things differently.
Note that a class can implement multiple interfaces

Re: How can i to call a public method of page from user control?

amitsplash@gmail.com — Thu, 07 Aug 2008 07:02:29 GMT

what if I have different functions to call for different cases like in first form we have BindGrid() method to call and in second class we have BindGrid and BindGridData() to call

Re: How can i to call a public method of page from user control?

moredotnet — Fri, 25 Jul 2008 07:25:07 GMT

Simply Awesome!

Re: How can i to call a public method of page from user control?

Eustaquio — Wed, 12 Sep 2007 09:30:19 GMT

Great solution. Thanks a lot.

Re: How can i to call a public method of page from user control?

Thomas Sun – MSFT — Wed, 12 Sep 2007 08:19:06 GMT

Hi,

Based on my understanding, you want to know how to call the method that is declared on the page from UserControl. If I have misunderstood you, please feel free to let me know.

We can call the method that is declared on the page from UserControl in the asp.net 2.0. For example, we can create an abstract base class for the Page in the App_Code folder. The following is the abstract base class which will be inherited by the Page:

/// <summary>
/// Summary description for AbstractBaseClass
/// </summary>
public abstract class AbstractBaseClass : System.Web.UI.Page
{
	public AbstractBaseClass()
	{
		//
		// TODO: Add constructor logic here
		//
	}

    public abstract int DoSomething();
}

In the Page, we need to inherit this base class and override the abstract method declared in the base class:

public partial class UserControl_Default : AbstractBaseClass
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }

    public override int DoSomething()
    {
        return 1 + 1;
    }

    
}

In the UserControl, We just need to call the method which exists in the base class:

public partial class UserControl_WebUserControlA : System.Web.UI.UserControl
{
    protected void Page_Load(object sender, EventArgs e)
    {
        AbstractBaseClass page = (AbstractBaseClass)Page;
        int iResult = page.DoSomething();
    }
}

I hope this helps.

Re: How can i to call a public method of page from user control?

Eustaquio — Mon, 10 Sep 2007 17:00:09 GMT

Thanks but I need a public or protected method, not static, from event in user control and i have an instance of page, this is page property of user control that is a pointer to container page.

The problem is that the page property is a Page class and i need to cast to MyPage to access it`s public methods or properties.

Re: How can i to call a public method of page from user control?

machta — Mon, 10 Sep 2007 16:41:36 GMT

This is calling static method, not public. So you can replace ~~public~~ with static and use NameSpace.Class.Method() to call this method. (For calling non static method you have to use istance of the class.)

You want to call this method from event?

(I didn't completely understand your question - I didn't use asp.net 1.1)

How can i to call a public method of page from user control?

Eustaquio — Mon, 10 Sep 2007 16:23:18 GMT

In asp.net 1.1 it´s easy: ((PageNameSpace.PageClass)Page).PublicMethod()

but in asp.net 2.0 I don´t know to do it.