One event handler for all events

Question

3.00/5 (2 votes)

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I have many textbox ,now I want to bind all textChanged events to one
event handler ,I write something like this ,but I think it could be better
But HOW?...I meant a way by Delegates..

C#

txtbox1.TextChanged += new EventHandler(txt_TextChanged);
           txtbox2.TextChanged += new EventHandler(txt_TextChanged);
           txtbox3.TextChanged += new EventHandler(txt_TextChanged);
          .....

C#

void txt_TextChanged(object sender, EventArgs e)
       {
           errorProvider1.SetError((TextBox)(sender), "");
       }

Posted 17-Oct-10 19:30pm

Nima.naqipoor

Updated 17-Oct-10 20:27pm

v2

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Dave Paras · Accepted Answer · 2010-10-17T20:31:00

Solution 2

Steps
------
1. Write a TextChange event in code.
2. Open form designer.
3. Select required textboxes for which you want to share common TextChange event.
4. Open property window or press F4 (click event)
5. In TextChange event of property window, select TextChange event written by you in code.
6. Press enter.

No need to make code! :)

Posted 17-Oct-10 20:31pm

Dave Paras

Updated 17-Oct-10 23:16pm

v2

Comments

Dalek Dave 18-Oct-10 3:46am

Good Answer.

**JF2015** · Accepted Answer · 2010-10-17T20:06:00

Solution 1

Hi,

this should do the trick:

foreach (Control ctrl in this.Controls)
{  
  if (ctrl is TextBox)
  {
    ctrl.TextChanged += new EventHandler(txt_TextChanged);
  }
}

Posted 17-Oct-10 20:06pm

JF2015