C# – Pass data from a ASP.NET page to ASCX user controls loaded dynamically

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I'm developing an ASP.NET application with C# and Ajax.

I have a page that holds user controls loaded dynamically. I need to pass some data (integer values and some strings) to the user control that has been loaded dynamically.

Now I use Session to pass these values, but I think I can use another way; something like VIEWSTATE or hidden input.

What do you recommend me?

UPDATE:

The fact that I load the controls dynamically is important because controls are loaded on every postback, and I can't store any value on controls.

Best Answer

Create a property on your user control with the datatype of the data you want to pass to it, and populate it in your page on creation of the control.

public class myControl : Control
{
  ...
  public int myIntValue {get; set;}
  ...
}

In the code behind:

myControl ctrl = new myControl();
ctrl.myIntValue = 5;

You can also do this directly in markup:

<uc1:myControl ID="uc1" runat="server" myIntValue="5" />

Related Solutions

C# – Processing events on Dynamically Loaded User Controls

You're asking if you can keep the control loaded in the page?

You can't keep the control loaded in the page, because the page doesn't exist! It's recreated on every request. It's created from the markup (compiled or not), and from running any code in the CodeBehind. If you want your controls to be there after a PostBack, then you need to recreate them on the PostBack. If you want to process events on those controls, then you'll have to wire the controls to event handlers when you recreate them after PostBack. Then the events will fire.

C# – Load ASCX controls dynamically using AJAX

Wrap your treeview inside an UpdatePanel, and add the following code in the code-behind. (assuming your right panel is called 'PanelOnTheRight', and you have a usercontrol 'MyEditControl' with a property 'IdToEdit').

void MyTreeView_SelectedNodeChanged(Object sender, EventArgs e)
{
    PanelOnTheRight.Controls.Clear();

    MyEditControl editControl = LoadControl("~/usercontrols/mycontrol.ascx");
    editControl.IdToEdit = ((TreeView)sender).SelectedNode.Value;

    PanelOnTheRight.Controls.Add(editControl);
}

Best Answer

Related Solutions

C# – Processing events on Dynamically Loaded User Controls

C# – Load ASCX controls dynamically using AJAX

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