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Zone: > NEWSGROUP > Asp.Net Forum > general_asp.net.master_pages_themes_and_navigation_controls Tags:
Item Type: NewsGroup Date Entered: 11/29/2007 9:11:14 AM Date Modified: Subscribers: 0 Subscribe Alert
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Gustavo Villa
Asp.Net User
Controls in a Child Page11/29/2007 9:11:14 AM

0/0

Hello,

I need to access the controls of a child page to set the properties of some of them. When I use Me.Form.Controls in the child .vb page I get the controls of the master page. I tried with the content control and some other possibilities without success. Any suggestion?

 Thank you,

Gustavo
 
scott@elbandit.
Asp.Net User
Re: Controls in a Child Page11/29/2007 10:19:51 AM

0/0

Master page HTML:

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
       <title>Untitled Page</title>
</head>
<body>
        <form id="form1" runat="server">
             <div>
                <asp:contentplaceholder id="ContentPlaceHolder1" runat="server"></asp:contentplaceholder>
             </div>
        </form>
</body>
</html>

Master page Code behind:

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
           CType(Me.ContentPlaceHolder1.FindControl("label1"), Label).Text = "hello"
End Sub

Page that uses the master page:

<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
         <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
</asp:Content>

This shows that you can access controls on the child page from the master page. Does this solve your problem?

--------------------------------------------------------
Don't forget to click "Mark as Answer" on the post(s) that helped you.

Scott ASP.net blog
Gustavo Villa
Asp.Net User
Re: Controls in a Child Page11/29/2007 12:09:06 PM

0/0

 Thank you, Scott, but It does not solve the problem.

 I need to access child's controls in child's code behind, something like this:

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
    
        Dim ctr As Web.UI.Control
        Dim editmode As Boolean = False

        Select Case Request.Params("editmode")
            Case "S", "s"
                editmode = True
            Case "N", "n"
                editmode = False
        End Select

        For Each ctr In Me.Controls
            If ctr.GetType().Equals(GetType(HyperLink)) AndAlso ctr.ID.Contains("_ResourceHyperLink") Then
                ctr.Visible = editmode
            End If
        Next
       
    End Sub

But Me.Controls brings MasterPage?s controls.
scott@elbandit.
Asp.Net User
Re: Controls in a Child Page11/29/2007 12:20:52 PM

0/0

Try accessing the controls collection in the content place holder:

Me.ContentPlaceHolder1.Controls

--------------------------------------------------------
Don't forget to click "Mark as Answer" on the post(s) that helped you.

Scott ASP.net blog
scott@elbandit.
Asp.Net User
Re: Controls in a Child Page11/29/2007 12:23:06 PM

0/0

Gustavo Villa:
For Each ctr In Me.Controls
            If ctr.GetType().Equals(GetType(HyperLink)) AndAlso ctr.ID.Contains("_ResourceHyperLink") Then
                ctr.Visible = editmode
            End If
        Next


Change to:

For Each ctr In Me.ContentPlaceHolder1.Controls
        If ctr.GetType().Equals(GetType(HyperLink)) AndAlso ctr.ID.Contains("_ResourceHyperLink") Then
                ctr.Visible = editmode
        End If
Next



 

--------------------------------------------------------
Don't forget to click "Mark as Answer" on the post(s) that helped you.

Scott ASP.net blog
naturehermit
Asp.Net User
Re: Controls in a Child Page11/29/2007 1:09:07 PM

0/0

Hi There,

First of Master Page is no, Master or neither a Parent page and nor does the Content Page a child page as Master page is a type of user control and at runtime they are all merged.

To access controls in content page you can access them directly, unless they are in another container, in which case you need to follow the hierarchy.

If you tell us, what control you are trying to acces in the child page with its aspx, perhaps we (me and others answering here) can help

Please Mark Post that helped you as answer, also include a summary of what solved the problem as it helps others in similar situations
Gustavo Villa
Asp.Net User
Re: Controls in a Child Page11/29/2007 2:01:41 PM

0/0

Hi,

I need to change the visible property of all HyperLinks in the Child Page, so I can't use the ID directly.

But finally I have solved doing this:

For Each ctr In Me.Form.FindControl("ContentPlaceHolder1").Controls
        If ctr.GetType().Equals(GetType(HyperLink)) AndAlso ctr.ID.Contains("_ResourceHyperLink") Then
                ctr.Visible = editmode
        End If

Thank you all. 


 
scott@elbandit.
Asp.Net User
Re: Controls in a Child Page11/29/2007 2:16:01 PM

0/0

Did this not work then?

For Each ctr In Me.ContentPlaceHolder1.Controls
        If ctr.GetType().Equals(GetType(HyperLink)) AndAlso ctr.ID.Contains("_ResourceHyperLink") Then
                ctr.Visible = editmode
        End If
Next

--------------------------------------------------------
Don't forget to click "Mark as Answer" on the post(s) that helped you.

Scott ASP.net blog
Gustavo Villa
Asp.Net User
Re: Controls in a Child Page11/29/2007 3:36:07 PM

0/0

 

No, in Child.aspx.vb I got the alert ContentPlaceHolder1 is not member of Child.

Thanks! 


 
scott@elbandit.
Asp.Net User
Re: Controls in a Child Page11/29/2007 3:48:16 PM

0/0

Sorry my code was running from the MasterPage code behind - sorry I misread the post Embarrassed

--------------------------------------------------------
Don't forget to click "Mark as Answer" on the post(s) that helped you.

Scott ASP.net blog
mnirmala@hotmai
Asp.Net User
Re: Controls in a Child Page12/5/2007 8:34:58 PM

0/0

Hi all, 

How do I access child textbox control id in master page javascript

 

Thanks

Nirmala 
Gustavo Villa
Asp.Net User
Re: Controls in a Child Page12/6/2007 12:32:28 PM

0/0

Hi, 

 ?Do you mean within a javascript tag in the Master Page aspx file?
mnirmala@hotmai
Asp.Net User
Re: Controls in a Child Page12/6/2007 2:22:28 PM

0/0

 Yes.  I did extensive search and looks like it is not possible.  Now we are trying to add that javascript in codebehind of child page.  The tricky part is, it should trigger onload event which we usually call like <body onload="resulttest();">.  Where we want to show a progress bar in javascript until the page is uploaded based on the textbox control value , as it is a long page.  But body tag is not available in child page.  Any suggestions please.

Thanks

 

Nirmala 
Gustavo Villa
Asp.Net User
Re: Controls in a Child Page12/6/2007 3:34:01 PM

0/0

 

When the server responses, the page (master and child) is sended as one to the browser, maybe you can look at the page's code (browser utility) to know what ID was given by the server for the textbox, and use this ID to find your control with the method getElemementById of the document object. Something as the following:

<script type="text/javascript">
function getValue()
  {
  	var x=document.getElementById("MyTextbox");
  	var ProgressTicks = x.value;
	...
	...
  }
</script>

 I hope it helps.
mnirmala@hotmai
Asp.Net User
Re: Controls in a Child Page12/6/2007 7:31:12 PM

0/0

 Hi Gustavo,

Thank you for responding to my queries.  Finding the Id of the control was the tricky part.  We got the id by doing something like document.getbyElementId(document.aspnetForm._ct100_contentplaceholder1_controlId. And in the child page we were writing the javascript above the contentholder and it was erroring out.  After we included the script inside the contentholder it works fine. 

Thanks lot.

Nirmala 
15 Items, 1 Pages 1 |< << Go >> >|


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