Asp – Dynamically generated WebUser Control

asp.net

I have two WebUser Controls which are dynamically added to the Webform a number of times according to the user input from a previous page. There are some textboxes and drop downs in the WebUser control. I need to get the values from the textboxes of the WebUsercontrol which are added dynamically. How do I do that?

Best Answer

You should expose the control values as properties in your user control. Then you can loop through the container's Controls collection.

foreach (Control ctl in container.Controls)
{
    if (ctl is MyUserControl)
    {
         MyUserControl uctl = (MyUserControl)ctl;
         // do something with uctl properties, e.g.
         string myString = uctl.Address1;
    }
}

Related Solutions

ASP.NET: How to add two Web User Controls in the same aspx page dynamically

Have you tried setting an ID for the user control? ie

 Control uc = (WebUserControl)Page.LoadControl("WebUserControlAdult.ascx");
 uc.id = "Dyn" + i.tostring();
 Panel1.Controls.Add(uc);

Or is the UserControl being cast to the wrong type? Maybe

(WebUserControlAdult)Page.LoadControl ...

Dynamically Change User Control in ASP.Net

What you need to do is keep the last known value of the DropDownList in the Session. Then:

OnInit:

Create whatever control is indicated by the saved value in the session

SelectionChanged Event

Remove whatever you created during OnInit
Create and add new control based on new DropDownList selection
Save new DropDownList selection in session

This way, on the next postback after a change you are re-creating the control that ViewState expected to find, and so it's state will be restored.

Dynamic controls can be very finicky. Often it is easier to create all of the controls you might possible need and set their Visible properties to false. This way they don't render to the browser at all. Then set Visible to true for just the controls you need when you need them.

Best Answer

Related Solutions

ASP.NET: How to add two Web User Controls in the same aspx page dynamically

Dynamically Change User Control in ASP.Net

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