how do u check if an entered time or date is valid

how do u check if an entered time or date is valid

• TruePsion

  Hi,

  you can use the DateTime.TryParse http://msdn2.microsoft.com/en-us/library/9h21f14e.aspx you can pass a string to this method as well as a formatting string to tell the method how it should interpret the data. If the string value is in the correct format then it will return a valid DateTime object in the out parameter.

  Mark.

  
  
  

• regthesk8r

  Hi. One practical way to solve this kind of problems is by using Regular Expressions (Regex class in System.Text.RegularExpressions)

  private void btnCheckInput_Click(object sender, EventArgs e)
  {
  Regex reDate = new Regex(@"^(\d{4})(-\d{2}-\d{2})$");
  Regex reTime = new Regex(@"^(\d{1,2})((:\d{1,2}) (PM))$");
  
  if (reDate.IsMatch(txtDate.Text))
  {
  MessageBox.Show("Date OK");
  }
  else
  {
  MessageBox.Show("Date Error");
  return;
  }
  
  if (reTime.IsMatch(txtTime.Text))
  {
  MessageBox.Show("Time OK");
  }
  else
  {
  MessageBox.Show("Time Error");
  return;
  }
  }
  
  Check this link: http://msdn2.microsoft.com/en-us/library/az24scfc(VS.80).aspx

  Bye!

  
  
• how do u check if an entered time or date is valid