Accessing a property in a webcontrol from parent page

[spmm#]

Hi!

Could someone please help me with the following; I have a WebControl that
basically looks like this:

public class LeftMenu : System.Web.UI.W ebControls.WebC ontrol
{
private string m_CurrentNodeId = string.Empty;

public string CurrentNodeId
{
get
{
return m_CurrentNodeId ;
}
}

private void Page_Load(objec t sender, System.EventArg s e)
{
...
}

private void custExpand_Clic k(object sender,EventArg s e)
{
m_CurrentNodeId = e.SomeStringVal ue;
}
}

Which I'm loading into my parent page like this:

public class Default
{
protected LeftMenu mmLeftMenu;
protected System.Web.UI.W ebControls.Pane l pnlLeftMenu;
public string CurrentNodeId = String.Empty;

private void Page_Load(objec t sender, System.EventArg s e)
{
mmLeftMenu =
(LeftMenu)LoadC ontrol(pnlLeftM enu,@"~\Control s\LeftMenu.ascx ");
CurrentNodeId = mmLeftMenu.Curr entNodeId;
}
}

Problem is CurrentNodeId in Default never gets the value of
mmLeftMenu.Curr entNodeId, because custExpand_Clic k gets fired after the
Page_Load in Default. How should I set things up, so that I can get the
value of mmLeftMenu.Curr entNodeId in Default???

Thanks.

[Kevin Spencer]

What you have here is an issue of sequence. This problem is fairly common,
esp. among newer developers of ASP.Net, as the .Net SDK seems to have a lot
of samples using the Page_Load event. In point of fact, however, the
system.Web.UI.P age class is derived from System.Web.UI.C ontrol, and every
Control has about a dozen event handlers that you can wire up, all of which
occur in a specific sequence. To find out more about the sequence of events,
see:

http://msdn.microsoft.com/library/de...nLifecycle.asp

--
HTH,
Kevin Spencer
..Net Developer
Microsoft MVP
I get paid good money to
solve puzzles for a living

"spmm#" <sp******@yahoo .com> wrote in message
news:41******** *************** @news.xs4all.nl ...

Hi!

Could someone please help me with the following; I have a WebControl that
basically looks like this:

public class LeftMenu : System.Web.UI.W ebControls.WebC ontrol
{
private string m_CurrentNodeId = string.Empty;

public string CurrentNodeId
{
get
{
return m_CurrentNodeId ;
}
}

private void Page_Load(objec t sender, System.EventArg s e)
{
...
}

private void custExpand_Clic k(object sender,EventArg s e)
{
m_CurrentNodeId = e.SomeStringVal ue;
}
}

Which I'm loading into my parent page like this:

public class Default
{
protected LeftMenu mmLeftMenu;
protected System.Web.UI.W ebControls.Pane l pnlLeftMenu;
public string CurrentNodeId = String.Empty;

private void Page_Load(objec t sender, System.EventArg s e)
{
mmLeftMenu =
(LeftMenu)LoadC ontrol(pnlLeftM enu,@"~\Control s\LeftMenu.ascx ");
CurrentNodeId = mmLeftMenu.Curr entNodeId;
}
}

Problem is CurrentNodeId in Default never gets the value of
mmLeftMenu.Curr entNodeId, because custExpand_Clic k gets fired after the
Page_Load in Default. How should I set things up, so that I can get the
value of mmLeftMenu.Curr entNodeId in Default???

Thanks.

[Karl Seguin]

You might need to make your webcontrol raise an event when custExpand_Clic k
is hit, which the page can hook into...somethin g like

public class LeftMenu: WebControl{
public event CommandEventHan dler NodeClick;
...
private void custExpand_Clic k(object sender,EventArg s e) {
m_CurrentNodeId = e.SomeStringVal ue;
if (this.NodeClick != null){
CommandEventArg s ev = new CommandEventArg s("clicked",
m_CurrentNodeId );
this.NodeClick( this, ev);
}
}
}

the in your page, you can:

page_load{
mmLeftMenu =
(LeftMenu)LoadC ontrol(pnlLeftM enu,@"~\Control s\LeftMenu.ascx ");
mmLeftMenu.Node Click += new CommandEventHan dler(mmLeftMenu _NodeClick);
}

private void mmLeftMenu_Node Click(object sender, CommandEventArg s e) {
Response.Write( "node value: " + e.CommandArgume nt);
}
Karl


--
MY ASP.Net tutorials
http://www.openmymind.net/
"spmm#" <sp******@yahoo .com> wrote in message
news:41******** *************** @news.xs4all.nl ...

Hi!

Could someone please help me with the following; I have a WebControl that
basically looks like this:

public class LeftMenu : System.Web.UI.W ebControls.WebC ontrol
{
private string m_CurrentNodeId = string.Empty;

public string CurrentNodeId
{
get
{
return m_CurrentNodeId ;
}
}

private void Page_Load(objec t sender, System.EventArg s e)
{
...
}

private void custExpand_Clic k(object sender,EventArg s e)
{
m_CurrentNodeId = e.SomeStringVal ue;
}
}

Which I'm loading into my parent page like this:

public class Default
{
protected LeftMenu mmLeftMenu;
protected System.Web.UI.W ebControls.Pane l pnlLeftMenu;
public string CurrentNodeId = String.Empty;

private void Page_Load(objec t sender, System.EventArg s e)
{
mmLeftMenu =
(LeftMenu)LoadC ontrol(pnlLeftM enu,@"~\Control s\LeftMenu.ascx ");
CurrentNodeId = mmLeftMenu.Curr entNodeId;
}
}

Problem is CurrentNodeId in Default never gets the value of
mmLeftMenu.Curr entNodeId, because custExpand_Clic k gets fired after the
Page_Load in Default. How should I set things up, so that I can get the
value of mmLeftMenu.Curr entNodeId in Default???

Thanks.

[spmm#]

Thanks to both of you! Karl your solution works perfectly.