如何将值从页面传递到用户控件？

Question

I am using one user control in a page. Basically after login this page is coming with user control. I wanted pass the user name in that user control from login page.

Answer 1

Say for you store the login name in a LABEL somewhere on the main page. Like this:

lblLogin.Text = "LoginName";

Now, on the user control you have another LABEL called lblWCLogin where you want to assign the login name from Parent page. Do something like this:

Label lblTextFromParentPageLabel = this.Parent.FindControl("lblLogin"); 
lblWCLogin = lblTextFromParentPageLabel.Text;

Another Approach (does not matter if you have a MasterPage or not) is to Use Sessions.

Set session on you Page or MasterPage code behind. Like this:

Session["LoginName"] = "Some User Name";

Retrive the session value on UserControl like this:

string login_name = (string)(Session["LoginName"]);
Label1.Text = login_name;

Answer 2

There are many ways to achieve this

1. As one is to find the control
2. Store value in session and set the value from that session
3. Create public method of user control which will set the value of your label.. and call that userControl.SetPageLabel() method from your page at your desired places....

Make sure you have your label is in the update panel other wise label text will be changed but not visible on the screen...

Or you can use some javascript to set the label...

http://center4code.com/

Answer 3

There are many ways to do this.

My suggestion is create a Property field in the user control which allow you to read or write value from any page that refer to the user control.