Dynamically Adding a control to divLeft

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1/8/2011 10:02:17 AM
kanpinar
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Total Posts 9
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Dynamically Adding a control to divLeft

Hi All,

I am trying to add a control to divLeft ...

protected override void OnInit(EventArgs e)
{
base.OnInit(e);
this.Load += new EventHandler(Page_Load);
TreeView1.SelectedNodeChanged += new EventHandler(TreeView1_SelectedNodeChanged);

}
...
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
LoadSettings();
PopulateLabels();
}
TreeView1 = new TreeView();
PopulateControls();
}

...
...
...

Page.Master.FindControl("divLeft").Visible = true;
Page.Master.FindControl("divLeft").Controls.Add(TreeView1);

When i want to get postback by SelectedNodeChanged event it goes error...


Object reference not set to an instance of an object.

...
Line 256: parent.Controls.Add(c);
 

can any one help about this.

thnks.

1/8/2011 12:38:41 PM
Joe Audette
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Total Posts 18439
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Re: Dynamically Adding a control to divLeft

you should not be adding things to divLeft from code, it will be shown or hidden from the master page code depending on whether content is loaded there. The correct way to load something there is to create a UserControl or SiteModule and install it and add it from the content system, or embed a UserControl inside divLeft in layout.master and set AlwaysShowLeftColumn="true" on <portal:StyleSheetCombiner

you should not be editing any mojoPortal code at all, if you do that you will never be able to upgrade. All custom code should be in your own projects, mojoPortal code should only be used for learning and code examples of how to do common tasks can be found.

To do custom development you need to start with the basics and read the documentation and watch the videos

http://www.mojoportal.com/developerdocs.aspx

http://www.mojoportal.com/hello-world-developer-quick-start.aspx

http://www.mojoportal.com/developertrainingvideos.aspx

Hope it helps,

Joe

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