Windows Forms Input Validation with Validating Event and ErrorProvier Control

Please support our C# advertiser: Intel Parallel Studio Home
Shalvin Shalvin is offline Offline May 15th, 2008, 5:29 am |
0
Checking whether value is entered into a control and preventing focus to go out if no value is entered.
Show Printable Version Show Printable Version
Quick reply to this message  
Code Snippet
•
•
•
•
C# Syntax
Toggle Plain Text
  1. private void txtName_Validating(object sender, CancelEventArgs e)
  2. {
  3.     if (txtName.Text == "")
  4.     {
  5.         errorProvider1.SetError(txtName, "Name cannot be blank");
  6.         e.Cancel = true;
  7.     }
  8.     else
  9.         errorProvider1.SetError(txtName, "");
  10. }
Code Snippet Comments
0
bruceraymond bruceraymond is offline Offline | Jun 15th, 2008
•
•
•
•
C# has internal parsing routines that also work nicely.

Cheers,
Bruce


C# Syntax (Toggle Plain Text) 
  1. double x;
  2. bool valid = double.TryParse( initialValue.Text, out x );
 
 

Quick Comment
•
•
•
•
•
•
•
•
Message:
•
•
•
•


Similar Threads
Thread Tools Search this Thread



Tag cloud for C#
.net access ado.net algorithm array barchart bitmap box broadcast buttons c# chat check checkbox class client color combobox control conversion csharp custom database datagrid datagridview dataset datetime degrees development drawing encryption enum event excel file files form format ftp function gdi+ httpwebrequest image index input install java label list listbox listener login mandelbrot math mouseclick mysql networking object oracle path photoshop picturebox pixelinversion post prime programming radians regex remote remoting resource richtextbox save saving serialization server sleep socket sql statistics stream string table tcp text textbox thread time timer treeview update usercontrol validation view visualstudio webbrowser windows winforms wpf xml
About Us | Contact Us | Advertise | DaniWeb | Acceptable Use Policy | RSS Feed

©2003 - 2009 DaniWeb® LLC