How do I change the value of a DateTime in the debugger? I can change it, but I get an error when leaving the edit field; it cannot parse it.
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9 Answers
Without looking at what you have, I'm not really sure what edit field you're referring to. However, you could try using the immediate window and DateTime.Parse or new DateTime() instead.
4 Comments
Rabbit
For instance in the watch window; a DateTime will show as {03/12/2009 00:00:00}, but if I change e.g. the date to 04 instead of 03, I get an error from VS: Invalid expression term '{'
Rabbit
Thanks (also you, astander), that's what I needed. Although I think it sucks :-) The debugger should support that.
jhhwilliams
slugster's answer has an example of how to use this answer: Just type the following in the Immediate window
myDate = new DateTime(2009, 12, 25)
Simon
immediate windows doesn´t work, when you want to set an datetime in an object, that is declared by an interface, but the interfaces doesn´t have that property.
You can change the date in the Immediate Window.
date = new DateTime(2009, 10, 05)
{05/Oct/2009 12:00:00 AM}
Date: {05/Oct/2009 12:00:00 AM}
Day: 5
DayOfWeek: Monday
DayOfYear: 278
Hour: 0
Kind: Unspecified
Millisecond: 0
Minute: 0
Month: 10
Second: 0
Ticks: 633902976000000000
TimeOfDay: {00:00:00}
Year: 2009
2 Comments
tanascius
If date is not readonly ... but he is asking for changing the value of a DateTime ... your solution is to change the reference. The answer should be - you can't, because it is immutable, isn't it?
kristianp
Date is immutable, but this creates a new date object which you can assign to the variable you want to change.
We do can change a DateTime value directly in the Watch Window. The trick is simple: we always have to use a "new DateTime()" method, providing the appropriate parameters.
The Watch Window do not allow you to to type a new value directly, so things like "2010-07-13 9:15" or even {13/07/2010 09:00:00} don't work.
2 Comments
DJH
You can do this hovering the mouse directly over the variable without having to use the Watch Window. It works in Visual Studio 2012. I don't know about previous versions.
William T. Mallard
Thank you, using new DateTime(...) did the trick! This was a member of class, and "token.expiry = new Datetime(...)" in the immediate window failed with "object reference not set to an instance of an object".
You can do it if you define your DateTime between parenthesis.
(new DateTime(2017, 09, 27))
Comments
You can type things like this in to the Immediate window, the Watch window, or the QuickWatch window and they will get evaluated:
myDate = DateTime.Today.AddDays(2)
myDate = new DateTime(2009, 12, 25)
Comments
If you mean on Visual Studio debugger try like this:
- set the breakpoint
- open your DateTime variable in QuickWatch for example (right click)
- in Expression text box enter new value, this is example if your variable name is "dt":
dt = dt.AddDays(3)
- press enter and continue executing project
Comments
The "dt = " portion isn't strictly necessary. Just type in "dt.AddDays(3)" or "new DateTime(...)" or DateTime.Parse(""), etc, and the debugger will try to assign whatever value results from the expression you type to the variable under watch; it just so happens that because C# has assignment expressions (e.g. y = (x = 1); //sets y = 1) that assigning the expression to the variable name works. :)
1 Comment
Corey Adler
Signatures are considered bad form. Please read the FAQ for details.
The most easy option (non generic) =>
In the Value input inside watch window for example
Type DateTime.Now then press enter
Et voilà ! :)
Comments
You can change the non-public data-value in miliseconds in debugger mode, to change it.
1 Comment
Community
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