bullrout
asked on
Inherits System.web.ui.page,Inherits System.Web.UI.UserControl in the same class? or is it not possible?
Hi There,
I have a code behind page with a class that populates a listbox control, I am using the control on aspx pages and usercontrols as well. I know that I cannot Inherit a user control and a web page in the same class or can I? The problem is that I need to use a function to populate a dropdownlist that appears sometimes on an aspx page and other times on a user control. I would like to keep all of the functionality in the same code behind and then just reference it in each page, when I try to access a function in a different class it does not work, do I have to rename the function that I'm using the second class in order for it to work or can I use the inherits clause twice somehow?
Sean - thank in advance for you answer
Public Class CommonFunctions
Inherits System.web.ui.page
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs)
If Not Page.IsPostBack() Then
End If
End Sub
Public Shared Function
do stuff
End Function
End Class
Public Class CommonFunctionsFormain
Inherits System.Web.UI.UserControl
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs)
If Not Page.IsPostBack() Then
End If
End Sub
Public Shared Function
do stuff
End Function
End Class
I have a code behind page with a class that populates a listbox control, I am using the control on aspx pages and usercontrols as well. I know that I cannot Inherit a user control and a web page in the same class or can I? The problem is that I need to use a function to populate a dropdownlist that appears sometimes on an aspx page and other times on a user control. I would like to keep all of the functionality in the same code behind and then just reference it in each page, when I try to access a function in a different class it does not work, do I have to rename the function that I'm using the second class in order for it to work or can I use the inherits clause twice somehow?
Sean - thank in advance for you answer
Public Class CommonFunctions
Inherits System.web.ui.page
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs)
If Not Page.IsPostBack() Then
End If
End Sub
Public Shared Function
do stuff
End Function
End Class
Public Class CommonFunctionsFormain
Inherits System.Web.UI.UserControl
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs)
If Not Page.IsPostBack() Then
End If
End Sub
Public Shared Function
do stuff
End Function
End Class
Public Class CommonFunctions
Public Sub PopulateList(ByRef oControl As DropDownList)
'DoStuff
End Sub
End Class
Call the function from a page and passit a reference to the dropdownlist, maybe some other parameters aswell to tell it what needs done or some data or something.
Public Sub PopulateList(ByRef oControl As DropDownList)
'DoStuff
End Sub
End Class
Call the function from a page and passit a reference to the dropdownlist, maybe some other parameters aswell to tell it what needs done or some data or something.
ASKER
Hi There,
I am still pretty new to asp .net and I gues still learning how to take advantage of all of it's features. Would I call the function like below if I was to use this on all my pages?
Sean
<%@ Page language="vb" Src="mycodebehind.vb" Inherits="namespace.Common
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs)
If Not Page.IsPostBack() Then
PopulateList(MyDropDownLis
End If
End Sub
I am still pretty new to asp .net and I gues still learning how to take advantage of all of it's features. Would I call the function like below if I was to use this on all my pages?
Sean
<%@ Page language="vb" Src="mycodebehind.vb" Inherits="namespace.Common
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs)
If Not Page.IsPostBack() Then
PopulateList(MyDropDownLis
End If
End Sub
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ASKER
Hi There,
I am actuall using a ( i think ) a differnet way of populating the list, is there anyway that you can post some code so I can have a better understanding of what I can do?
Sean
Public Shared Function BindCategories() as SqlDataReader
Dim myConnection as New SqlConnection(Configuratio
Const strSQL as String = "SELECT CategoryID,CategoryDesc AS CategoryDesc " & _
"FROM tblProductCategories_b ORDER BY CategoryDesc"
Dim myCommand as New SqlCommand(strSQL, myConnection)
myConnection.Open()
Dim objDR1 as SqlDataReader
objDR1 = myCommand.ExecuteReader(Co
Return objDr1
End Function
I am actuall using a ( i think ) a differnet way of populating the list, is there anyway that you can post some code so I can have a better understanding of what I can do?
Sean
Public Shared Function BindCategories() as SqlDataReader
Dim myConnection as New SqlConnection(Configuratio
Const strSQL as String = "SELECT CategoryID,CategoryDesc AS CategoryDesc " & _
"FROM tblProductCategories_b ORDER BY CategoryDesc"
Dim myCommand as New SqlCommand(strSQL, myConnection)
myConnection.Open()
Dim objDR1 as SqlDataReader
objDR1 = myCommand.ExecuteReader(Co
Return objDr1
End Function
Why do you have to inherit the Page or UserControl class? You just can create a class that will contains a method with all of the necessary functionality ( you can pass to it as parameters, Page object , source control ( page or usercontrol ) and in the right event in your aspx or ascx file just call this method
actually when you create the file ( aspx or ascx ) you write down which is the class that this file inherits - so if you tell that this is the page file it will acts like a aspx file - if you inherits the one with UserControl it should act as a user control, but i don't know if there is a way to change this programatically
Regards,
B..M