To pass values from one user control to another


      I have a page where there is a user control. inside that user control(let's say Usercontrol1) i have another user control(lets say Usercontrol2). in the usercontrol2 i have a tree and a button. When the page gets loaded first the treeview in the usercontrol2 should not get populated only when i click on a button in the Usercontrol1, then only the treeview in the Usercontrol2 should get populated. also i want to pass the text of a selected treenode when i click on the usercontrol2's button to a textbox in the usercontrol1. can someone tell me how to do it with an example in C#. i am new to programming.



3/7/2008 6:14:16 AM 93655 articles. 6 followers. Follow

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From usercontrol1 pass values into usercontrol2 is easy . make public property like

public TextBox txtFromUserControl2

{ get {return txtbox;}

set {txtbox = value;}


and then from user control1, just call

UserControl2.txtFormUserControl2 and it will allow you set or get this object

From UserControl2 call userControl1 is little trick, you can use delegate or bubble event 

See url for details  

Don't forget to click "Mark as Answer" on the post(s) that helped you.
3/7/2008 6:27:00 AM

have u added a delegate event for the button clicked like in the example below.


public partial class WebUserControl1 : System.Web.UI.UserControl


public delegate void ButtonClciked(object sender, EventArgs e);

public event ButtonClciked OnbuttonClicked;

protected void Page_Load(object sender, EventArgs e)



protected void Button1_Click(object sender, EventArgs e)


if (OnbuttonClicked != null)


OnbuttonClicked(sender, e);








public partial class WebUserControl2 : System.Web.UI.UserControl


protected void Page_Load(object sender, EventArgs e)



public void FunctionToCall()





//////uractauall page in which both control resides

public partial class Third : System.Web.UI.Page


protected void Page_Load(object sender, EventArgs e)


this.WebUserControl1_1.OnbuttonClicked+=new WebUserControl1.ButtonClciked(WebUserControl1_1_OnbuttonClicked);


public void WebUserControl1_1_OnbuttonClicked(object sender, EventArgs e)






//try to follow the example

this example is successfully calling the funtion in the user control 2 u can also call any thing in ur user control

hope this helps


mark this as answer if the post helps

Saima Ghumman
--Mark the post as Answer if the Post helps you--
3/7/2008 6:44:41 AM

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