Ho to inherit a webuser control from another webuser control

Question

User-388731848 posted

I wantto inherit a webuser control from another webuser control and in the base webuser control i should have some functions which will be inherited by the other webuser control. How could i do that? 

Thanks in advance.

Answer 1

User2130758966 posted

 Depending on what you want - you could put the master user control inside the child user control and let it maniuplate it that way.

Answer 2

User-388731848 posted

Well actually i need to use some properties, methods and fields of base webusercontrol on several othe child webusercontrols. And i want the child webusercontrols to extend to the base websuercontrol just like polymorphism. And i don't wantto drop base webusercontrol onto chiled ones each time.

Answer 3

User2130758966 posted

 Try these resources:

• http://msdn.microsoft.com/en-us/library/system.web.ui.usercontrol.aspx 
• http://forums.asp.net/t/1111772.aspx
• http://www.developmentnow.com/g/10_2005_2_0_0_77519/Inherit-from-a-Web-User-Control.htm

Or depending on what you are attempting you might find it easier to just put this standard functionality in a helper class that you can call from any usercontrol?

Answer 4

User-388731848 posted

Thanks, however all those links are not really relevant to what i am looking for. The followings are wht i have done so far:

Base WebUserControl's code behind is:

public partial class WebUserControlBase : System.Web.UI.UserControl

{

//protected void Page_Load(object sender, EventArgs e)

//{

//}

private string Name = "KEMAL";

public string NAME { get { return Name; } set { Name = value; } }

public string Metod(string Ad)

{

return Ad + " " + "ESMER";

 

}

 

}

Base WebUserControl's HTML is:

<%@ Control Language="C#" AutoEventWireup="true" CodeFile="WebUserControlBase.ascx.cs" Inherits="WebUserControlBase" ClassName = "MyControls.UstControl" %>

<table border="0" cellpadding="0" cellspacing="0" style="width: 536px">

<tr>

<td>

</td>

<td>

<asp:Label ID="Label1Base" runat="server" Text="Ad-Base"></asp:Label>

&nbsp;

</td>

<td>

<asp:TextBox ID="TextBox1Base" runat="server"></asp:TextBox></td>

</tr>

<tr>

<td>

</td>

<td>

<asp:Label ID="Label2Base" runat="server" Text="Soyad-Base"></asp:Label></td>

<td>

<asp:TextBox ID="TextBox2Base" runat="server"></asp:TextBox>&nbsp;

</td>

</tr>

<tr>

<td style="height: 19px">

</td>

<td style="height: 19px">

</td>

<td style="height: 19px">

<asp:Button ID="Button1Base" runat="server" Text="Button" /></td>

</tr>

</table>

 

Code behind of the Inherited WebUserControl from the base WebUserControl above is:

 

public partial class WebUserControlDerived : MyControls.UstControl

{

protected void Page_Load(object sender, EventArgs e)

{

//this.NAME = "Kemal";

 

}

protected void Button1Derived_Click(object sender, EventArgs e)

{

TextBox1Derived.Text = this.NAME;

TextBox2Derived.Text = this.Metod(this.NAME);

this.Calendar1.SelectedDate=DateTime.Today ;

}

}

 And HTML of this inherited child WebUserControl is:

<%@ Control Language="C#" AutoEventWireup="true" CodeFile="WebUserControlDerived.ascx.cs" Inherits="WebUserControlDerived" %>

<table border="0" cellpadding="0" cellspacing="0" style="width: 536px">

<tr>

<td>

</td>

<td>

<asp:Label ID="Label1Derived" runat="server" Text="Ad-Derived"></asp:Label>

&nbsp;

</td>

<td>

<asp:TextBox ID="TextBox1Derived" runat="server"></asp:TextBox></td>

</tr>

<tr>

<td>

</td>

<td>

<asp:Label ID="Label2Derived" runat="server" Text="Soyad-Derived"></asp:Label></td>

<td>

<asp:TextBox ID="TextBox2Derived" runat="server"></asp:TextBox></td>

</tr>

<tr>

<td style="height: 19px">

</td>

<td style="height: 19px">

</td>

<td style="height: 19px">

<asp:Button ID="Button1Derived" runat="server" Text="Button" OnClick="Button1Derived_Click" />

<asp:TextBox ID="TextBox3" runat="server"></asp:TextBox></td>

</tr>

</table>

 

The problem is that.: Although i say  "public partial class WebUserControlDerived :MyControls.UstControl" there in inherited WebUserControl's code behind, MyControls.UstControl is not recognized by .NET, thus i cannot see the properties, methods and fields of base WebUserConbtrol, when i say "this."  . Intellisense wouldn't list all the inherited metods fileds and properties etc from the base WebUserControl. I couldn't figure out why.

Thanks...

Answer 5

User-2106054853 posted

Hi,

When inheriting user control the ascx could not be inherited. You have to copy&paste all the code from parent user controls's ascx to the child user control's.

 Or you can use custom control instead.

 

Answer 6

User-388731848 posted

Hi,

When inheriting user control the ascx could not be inherited. You have to copy&paste all the code from parent user controls's ascx to the child user control's.

 Or you can use custom control instead.

 

Well, i already inherited the codebehind of the master WebUserControl. What do you exactly mean when you say "When inheriting user control the ascx could not be inherited".  Do you mean i cannot inherit the HTML side of the WebUserControl. And what is a custom control?

Answer 7

User-2106054853 posted

Do you mean i cannot inherit the HTML side of the WebUserControl.

Yes.

And what is a custom control?

Please refer to:

http://support.microsoft.com/kb/893667