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just a simple request here about Datetime.ToString im not into this but needed the assistant

string today = "#datetime";
if (today == DateTime.Now.ToString("dd/MM/yyyy"))
{
Application.Run(new ClipboardNotification.NotificationForm());
}
else
{
Application.Run(new ClipboardNotification2.NotificationForm());
}
so apparently in this code above there is a method would run within only 1 IF statement after todays daily date has past, so I wanted to make it run after 2 days instead of 1 day so what should I put their?
any help would be appreciated

Compare the Dates with DateTime or TimeSpan which will be easier. Don't use strings for dates as they can't be compared (eg 11/23/2021 vs 23/11/2021). Try like this I hope its helps:
var date = new DateTime(2021,11,23);
if(date > DateTime.Today.AddDays(2))
{
// do stuff
}

const int intervalDays = 2; // desired interval
string dateString = "30/11/2021";
DateTime convertedDate = DateTime.ParseExact(dateString, "dd/MM/yyyy", CultureInfo.InvariantCulture);
TimeSpan gap = DateTime.Now - convertedDate;
if (Math.Abs(gap.Days) < intervalDays)
{
Console.WriteLine("logic for less than 2 days");
//Application.Run(new ClipboardNotification.NotificationForm());
}
else
{
Console.WriteLine("logic for greater than or equal to 2 days");
//Application.Run(new ClipboardNotification2.NotificationForm());
}
check if this works for you.

rounding to a specific 12hr timeframe in c#.net

I realize this may have been answered before, and I may just not be searching for the answer properly, so my apologies if this is a duplicate. This is for a c# webform.
I've got a datetime, set to now, and rounded up the nearest 30 minutes:
DateTime dtNow = RoundUp(DateTime.Now, TimeSpan.FromMinutes(30));
I'm splitting the datetime into its component parts, using M:YY tt (no preceding 0 on the month, two digit year, 12 hr am/pm)
DateString = dtNow.ToString("M/dd/yy");
TimeString = dtNow.ToString("h:mm tt");
What I want do to is simple, I want to see if that TimeString falls between 7:00pm and 5:59am, just need to round it to 6:00am of the following day (unless its past midnight, in which case 6:00am of that day).
Can anyone help me out, or at least point out where its already answered?

You should really stick to DateTime. What you want using string will always need to parse again that string into a DateTime to implement your logic.
A simple solution:
public static DateTime GetRoundedDate(DateTime originalDate)
{
if(originalDate.Hour > 19)
return originalDate.Date.AddDays(1).AddHours(6);
else if (originalDate.Hour < 6)
return originalDate.Date.AddHours(6);
return originalDate;
}
So now you may call:
DateTime dtNow = RoundUp(DateTime.Now, TimeSpan.FromMinutes(30));
var rounded = GetRoundedDate(dtNow);
DateString = rounded.ToString("M/dd/yy");
TimeString = rounded.ToString("h:mm tt");

Just look at the time properties on your DateTime object.
if (dtNow.Hour >= 19 || (dtNow is tomorrow && dtNow.Hour <= 7)) {
//do your stuff
}
where "is tomorrow" is something like dtNow.Date == DateTime.Today.AddDays(1)

Best way to Compare DateTime to trigger code

What is the best way to compare two DateTime in a specific format and trigger code if DateTime has passed.
My DateTime is formatted as 4/26/2017 10:00:00 AM
DateTime currentDateTime = DateTime.Now;
DateTime eventDateTime = DateTime.Parse("4/26/2017 10:00:00 AM");
int result = DateTime.Compare(currentDateTime, eventDateTime);
if (result < 0)
Response.Write( "is earlier than Do Nothing");
else if (result == 0)
Response.Write("is the same time as: Do Nothing");
else
Response.Write("Time is greater, Trigger Action ");
Is the above code fine for comparison or we can improve it.

For my opinion, the method you suggested is the most efficiant and accepted way to compare 2 DateTime variables in C#, considering you need to take action if the 2 dates are also equal.
Side note:
If you only needed to compare the 2 DateTime without the equal condition, you could just write:
if (currentDateTime < eventDateTime)
Response.Write("is earlier than Do Nothing");
else
Response.Write("Time is greater, Trigger Action");
which is a bit cleaner and more efficiant.

To compare Dates, your method is efficient one because according to MSDN
The CompareTo method compares the Ticks property of the current instance and value but ignores their Kind property. Before comparing DateTime objects, make sure that the objects represent times in the same time zone.
So as it does compare Ticks of two instances of DateTime, so it is the efficient method for comparison.
As a side note, if you want to find interval between DateTime Instances then you can use DateTime.Subtraction it will give TimeSpan of both DateTime instances. So you can find total difference in their minutes, hours, days, seconds, milliseconds by using TimeSpan properties.
DateTime date1 = new DateTime(2010, 1, 1, 8, 0, 15);
DateTime dateNow = DateTime.Now;
TimeSpan interval = dateNow.Subtract(date1);
double totalHours= interval.TotalHours;
double totalMinutes = interval.TotalMinutes;
double totalSeconds= interval.TotalSeconds;
double totalMilliseconds= interval.TotalMilliseconds;

You can use nested if else statement as below:
if (currentDateTime < eventDateTime)
Response.Write("is earlier than Do Nothing");
else if(currentDateTime > eventDateTime)
Response.Write("time is greater, Trigger Action");
else
Response.Write("is the same time as: Do Nothing");

C# - Alarm clock - Are two times the same

I am in the process of making an alarm clock app in C# via Windows Forms. So far, I have this non-working section of code for my time checker.
string alarm = this.dateTimePicker1.Text;
if (DateTime.Now.ToString() == alarm)
{
MessageBox.Show("Alarm");
}
The DateTimePicker is configured for hours, minutes, and seconds. The above code is not displaying the message box at all. Where is the problem in the snippet?
Also: are there any more efficient ways of making an alarm clock

Try this to get you going:
Need to compare Hour and minutes.
private void CheckTime()
{
clock.Text = DateTime.Now.ToString("hh:mm:ss");
date.Text = DateTime.Now.ToLongDateString();
DateTime alarm = this.dateTimePicker1.Value;
DateTime currentTime = DateTime.Now;
if (alarm.Hour == currentTime.Hour && alarm.Minute == currentTime.Minute)
{
timer1.Enabled = false;
MessageBox.Show("Alarm");
}
}

Since it is an alarm clock, you'll want to do the compare including the time. That said, compare the .Ticks values of your DateTime objects:
if(DateTime.Now.Ticks >= this.DateTimePicker1.Value.Ticks)
{
// Sound the alarm
}
Depending on how the DateTimePicker you are using works, you may need to check the Value for null before comparing.

Modify the below code as needed. I find comparing strings to be a poor way to go about this.
DateTime alarm = this.dateTimePicker1.Value.Date;
if (DateTime.Compare(DateTime.Now.Date, alarm) == 0) {
MessageBow.Show("Alarm"); }

Problem is that you are looking for the exact match. Instead you should be looking if the alarm time has passed (so ">="). Also, the string comparison is not going to work for date time. You need to compare date/times:
string alarm = this.dateTimePicker1.Value;
if (DateTime.Now() >= alarm)
{
MessageBox.Show("Alarm");
}

Regular DateTime question

I'm writing a service but I want to have config settings to make sure that the service does not run within a certain time window on one day of the week. eg Mondays between 17:00 and 19:00.
Is it possible to create a datetime that represents any monday so I can have one App config key for DontProcessStartTime and one for DontProcessEndTime with a values like "Monday 17:00" and "Monday 19:00"?
Otherwise I assume I'll have to have separate keys for the day and time for start and end of the time window.
Any thoughts?
thanks

You could use a utility that will parse your weekday text into a System.DayOfWeek enumeration, example here. You can then use the Enum in a comparison against the DateTime.Now.DayOfWeek

You can save the day of the week and start hour and endhour in your config file, and then use a function similar to the following:
public bool ShouldRun(DateTime dateToCheck)
{
//These should be read from your config file:
var day = DayOfWeek.Monday;
var start = 17;
var end = 19;
return !dateToCheck.DayOfWeek == day &&
!(dateToCheck.Hour >= start && dateToCheck.Hour < end);
}

You can use DayOfTheWeek property of the DateTime.
And to check proper time you can use DateTime.Today (returns date-time set to today with time set to 00:00:00) and add to it necessary amount of hours and minutes.

The DateTime object cannot handle a value that means all mondays. It would have to be a specific Monday. There is a DayOfWeek enumeration. Another object that may help you is a TimeSpan object. You could use the DayOfWeek combined with TimeSpan to tell you when to start, then use another TimeSpan to tell you how long

This is very rough code, but illustrates that you can check a DateTime object containing the current time as you wish to do:
protected bool IsOkToRunNow()
{
bool result = false;
DateTime currentTime = DateTime.Now;
if (currentTime.DayOfWeek != DayOfWeek.Monday && (currentTime.Hour <= 17 || currentTime.Hour >= 19))
{
result = true;
}
return result;
}