Sorry, I misunderstood what you said.

This solution works fine. Thank you



>Kevin,
>You asked how to convert char (unicode) to byte. But substring returns a string.
>System.Text.Encoding.ASCII.GetBytes(sString) would return a byte[].
>As I see you need it to validate a time string. Then you might instead directly use DateTime class' Parse.
>Cetin
>
>>Not sure why this doesn't work. ascVal contains the character
>>from the substring.
>>
>>Here's my code:
>>
>>

>>for(int iChar = 1; iChar < sTime.Length; iChar++)
>>{
>>  sChar = sTime.Substring(iChar - 1, 1);
>>
>>  byte ascVal = System.Convert.ToByte(sChar);
>>
>>  // Allowable values are 0-9,';','A','M','P'
>>  if ((iValue >= 48 && iValue <= 57) ||
>>    iValue == 58 ||
>>    iValue == 59 ||
>>    iValue == 77 ||
>>    iValue == 80)
>>  {
>>  }
>>  else
>>    bValid = false;
>>
>>}
>>
>>

>>
>>
>>
>>
>>>>I am extracting characters from a string.
>>>>
>>>>How can I determine the ASCII value of the characters?
>>>>
>>>>Thanks
>>>
>>>byte ascVal = System.Convert.ToByte(char);
>>>
>>>Cetin