How to add and pass value to Usercontrol from code behind aspx page

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I have a content page , on the content page i am using a user control . I need to add User control from code behind and pass the value in same time. Any help

Following i am adding user control to my aspx page but i don't know how to pass value to user control.

NOTE:: I can do this from HTML but i need to do from code behind

HTML

Dim MainContent As ContentPlaceHolder = TryCast(Master.FindControl("MainContent"), ContentPlaceHolder)
 Dim _usercontrol As UserControl = CType(Page.LoadControl("~\Usercontrols\dashboard_Employer.ascx"), Control)
MainContent.Controls.Add(_usercontrol)

I have property set in User Control Called ValueID. I need to pass this ID from code behind.

VB

Public Property ValueID() As Integer
       Get
           Return _ValueID
       End Get
       Set(ByVal value As Integer)
           _ValueID = value
       End Set
   End Property

Posted 15-May-12 8:55am

anjumnavid

Updated 15-May-12 9:44am

v4

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2 solutions

Solution 1

i don't know to pass value to user control.
Expose get-set properties in your user control and use them.

Posted 15-May-12 9:21am

Sandeep Mewara

Comments

anjumnavid 15-May-12 15:27pm

i have property set in my user control .

I just need help to calling and passing to user control from parent page code behind

Sandeep Mewara 15-May-12 15:36pm

What about: _usercontrol.ValueID = 25 ?

anjumnavid 15-May-12 15:43pm

This doesn't work.
Because i am not assigning my user control from asp page. what i am doing is :

Finding and adding my usercontrol to my parent page as follwing:

Dim MainContent As ContentPlaceHolder = TryCast(Master.FindControl("MainContent"), ContentPlaceHolder)

MainContent.Controls.Add(_usercontrol)

Next step is to pass value as you said up. but _usercontrol.valueID= 25 . Gives error

Sandeep Mewara 16-May-12 1:21am

Pretty strange way to use Usercontrol. Finding from exisiting masterpage and adding to some content holder. Hope you know what you are doing.

For the above, Once you find the control, cast it into Usercontrol type, your public property will be exposed. You can set the value then.

preet88 16-May-12 1:16am

see you can access your control properties using the control object
if in case you are finding that control so do make a reference of that control and then access properties of control using that reference.
thanks

anjumnavid 16-May-12 16:07pm

Thanks Sandeep, but after casting usercontrol type it still not exposing public property of user control

MugiwaraUK 29-May-12 10:07am

You need to cast the user control to dashboard_Employer to expose the properties for that control

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MugiwaraUK · Accepted Answer · 2012-05-29T04:03:00

You could always add the value as an attribute

VB

Dim MainContent As ContentPlaceHolder = TryCast(Master.FindControl("MainContent"), ContentPlaceHolder)
 Dim _usercontrol As UserControl = CType(Page.LoadControl("~\Usercontrols\dashboard_Employer.ascx"), Control)
MainContent.Controls.Add(_usercontrol)

_usercontrol.Attributes.Add("Value", "1")

In your user control you could set

VB

Public Property ValueID() As Integer
        Get
            Return If(Me.Attributes("ValueID").Length < 1, 0, CType(a.Attributes("ValueID"), Integer))
        End Get
        Set(ByVal value As Integer)
            Me.Attributes.Add("ValueID", value.ToString())
        End Set
    End Property