Re: How to validate HH:MM time for each key press event

Hi Vijay,

I believe the right approach is to create regular expression or find one for HH:MM format.
If you cannot succeed then use the following code which creates a datetime using the hour and minute specified.

public static bool IsHHMMValid(string input)

{

try

{

int hour = int.Parse(input.Split(':')[0]); //0-23

int minute = int.Parse(input.Split(':')[1]);//0-59

DateTime date = new DateTime(2000, 1, 1, hour, minute, 0);

return true;

}

catch

{

return false;

}

}

I have tested it with various combinations:

bool isValid1 = IsHHMMValid("10:10");

bool isValid2 = IsHHMMValid("12:59");

bool isValid3 = IsHHMMValid("10:10");

bool isValid4 = IsHHMMValid("10:60");

bool isValid5 = IsHHMMValid("24:00");

bool isValid6 = IsHHMMValid("23:59");

Please mark as answer if it resolved, else let me know.

Regards,
Jean Paul

1 Reply

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Jean Paul15y ago
Hi Vijay,

I believe the right approach is to create regular expression or find one for HH:MM format.
If you cannot succeed then use the following code which creates a datetime using the hour and minute specified.

public static bool IsHHMMValid(string input)
{
try
{
int hour = int.Parse(input.Split(':')[0]); //0-23
int minute = int.Parse(input.Split(':')[1]);//0-59
DateTime date = new DateTime(2000, 1, 1, hour, minute, 0);

return true;
}
catch
{
return false;
}

}

I have tested it with various combinations:

bool isValid1 = IsHHMMValid("10:10");
bool isValid2 = IsHHMMValid("12:59");
bool isValid3 = IsHHMMValid("10:10");
bool isValid4 = IsHHMMValid("10:60");
bool isValid5 = IsHHMMValid("24:00");
bool isValid6 = IsHHMMValid("23:59");

Please mark as answer if it resolved, else let me know.

Regards,
Jean Paul