C# winform textbox.text doesn't change

Question

public partial class A : UserControl
{
  private string _x;
  public string X {
    get { return _x; }
    set { 
      this._x = value;
      this.textBox1.Text = this._x; 
  }
}
public partial class B : WinForm
{
   public B() {
     //Add usercontrol A to Groupbox1
     //Set A.X = "hello world"
   }
}
public class MainForm: WinForm
{
    public void button1_Click(....) { 
       B bForm = new B();
       bForm.ShowDialog();
    }
}

At design time, I set the textbox1.Text="hello". In the Main Class, I have a button that will open a new form B and on that form B I have a group box to add this user control A and change the X property value = "hello world" but the textBox1.Text doesn't change on the UI. When I set break point after the set textbox1.Text = this._x, it shows the value did change to "hello world" but it's not reflected on the UI?

Why? And how to fix it?

Thanks a bunch.

Do you want to change the text of textbox same as the X than you have to assign this.txtBox1.Text = this._x; — Rohit Vyas
– Rohit Vyas, Commented Feb 15, 2013 at 6:29
No, I don't use databinding. Wonder why the set .Text directly doesn't work. — HNGO
– HNGO, Commented Feb 15, 2013 at 6:40

nikita · Accepted Answer · 2013-02-15 07:24:17Z

3

My guess is (since I don't see all code and it's all like guessing game 8)) - there is InitializeComponent method in classB. Since X property doesn't have DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden) attribute it is serialized in InitializeComponent method with empty string - thus erasing previously explicitly set value.

answered Feb 15, 2013 at 7:24

nikita

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