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How do I check if a variable exists?
I want to check if a variable exists. Now I'm doing something like this:
11 Answers
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How to access session variables from any class in ASP.NET?
...ime myDate = MySession.Current.MyDate;
MySession.Current.MyDate = DateTime.Now;
This approach has several advantages:
it saves you from a lot of type-casting
you don't have to use hard-coded session keys throughout your application (e.g. Session["loginId"]
you can document your session items by ...
Change text color based on brightness of the covered background area?
I've thought about the following for a while already, so now I want to know your opinions, possible solutions, and so on.
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.Net picking wrong referenced assembly version
...nd those dlls could be hanging on to old references. It's worth a shot, I know it's worked for me in the past.
– Chris Conway
Nov 16 '10 at 1:47
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Xcode 6 iPhone Simulator Application Support location
...licLinkAtPath:aliasPath withDestinationPath:DOCS_DIR error:nil]; #endif Now I've got a simlink that works, even though iOS8 + XCode6 changes my App's Data GUID everytime I build.
– seabass
Sep 22 '14 at 17:56
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File name? Path name? Base name? Naming standard for pieces of a path
...onvention will be in vain. Here are my proposals, based on existing, well-known programs:
A) C:\users\OddThinking\Documents\My Source\Widget\foo.src
Vim calls it file root (:help filename-modifiers)
B) C:\users\OddThinking\Documents\My Source\Widget\foo.src
file name or base name
C) C:\...
Clicking the back button twice to exit an activity
...uple of seconds after the app closes? No one cares to cancel the toast? I know it may be a small detail but I think that should happen. What do you guys think?
– acrespo
Jul 1 '14 at 21:32
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How do I generate a stream from a string?
...his case that is the MemoryStream we want to return.
In .NET 4.5 there is now an overload for StreamWriter that keeps the underlying stream open after the writer is disposed of, but this code does the same thing and works with other versions of .NET too.
See Is there any way to close a StreamWrite...
xkcd style graphs in MATLAB
...novice: It'll be my third one. I hope I have it pretty much figured out by now :)
– Jonas
Oct 3 '12 at 16:29
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Multiline string literal in C#
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As a side-note, with C# 6.0 you can now combine interpolated strings with the verbatim string literal:
string camlCondition = $@"
<Where>
<Contains>
<FieldRef Name='Resource'/>
<Value Type='Text'>{(string)parameter}&...