how to get textbox value from one user control to other in c#

Question

I have two user control's . In the first user control( Class ) i have one textbox .

Now in my second user control ( Test ), i want to get the value of that textbox .

in my page, when user enter a value in texbox of the first usercontrol , how can i get this in the hidden field of the second usercontrol

How can I do this??

I have these properties in my usercontrols

Class User Control

public string Class_ClientId
        {
            get { return txtClass.ClientID; }
        }
public string Class_Text
        {
            get { return Class; }
            set
            {
                if (value != Class)
                {
                    Class = value;
                    txtClass.Text = Class;
                }
            }
        }

Test user control

public string KMAT_Text
        {
            get { return KMATName; }
            set
            {
                if (value != KMATName)
                {
                    KMATName = value;
                    txtKmat.Text = KMATName;
                }
            }
        }
 public string Class
        {
            get { return _hdnClass; }
            set
            {
                if (value!= _hdnClass)
                {
                    _hdnClass = value;
                    hdnClass.Value = _hdnClass;
                }
            }
        }

Answer 1

There are a variety of ways to do this. The easiest to implement would be to define a change event on the first user control:

public event EventHandler SomethingChanged;

protected void OnSomethingChanged(EventArgs e)
{
   if (SomethingChanged != null)
     SomethingChanged(this, e);
}

public string Class_Text
        {
            get { return Class; }
            set
            {
                if (value != Class)
                {
                    Class = value;
                    txtClass.Text = Class;

                    this.OnSomethingChanged(EventArgs.Empty);
                }
            }
        }

Have the page listen for it, and have the page pass the value to the second user control.