patterncsharpCritical
Can I find out the return value before returning while debugging in Visual Studio?
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Problem
Take the following function:
When I set a breakpoint in this function, is there a possibility to inspect the returned value?
The only way to inspect the returned datatable is to use a temporary variable. However, that's a bit inconvenient. Isn't there another way?
DataTable go() {
return someTableAdapter.getSomeData();
}When I set a breakpoint in this function, is there a possibility to inspect the returned value?
go() is directly coupled to a datagrid in an .aspx page.The only way to inspect the returned datatable is to use a temporary variable. However, that's a bit inconvenient. Isn't there another way?
Solution
Not that I know of. Note that if you do add a variable, it will get removed by the compiler in release builds anyway...
Update:
This functionality has been added to VS2013.
You can see the return values in the autos windows or use
The value can only be seen directly after returning from the function, thus the easiest way to access it is by putting a breakpoint on the function call and step over (F10) the call.
Update for VS2015: boo! unfortunately, it doesn't appear to be in VS2015 (devenv v14)
Update for VS2017: it's back. (devenv v15)
Update for VS2022: In Visual Studio 2022 the name $ReturnValue in watch window works, but it needs to be added to the watch window BEFORE "return" statement is hit, not after. (according to Andrew)
Update:
This functionality has been added to VS2013.
You can see the return values in the autos windows or use
$ReturnValue (or $ReturnValue1 or $returnvalue, depending on the VS version) in the watch/immediate window.The value can only be seen directly after returning from the function, thus the easiest way to access it is by putting a breakpoint on the function call and step over (F10) the call.
Update for VS2015: boo! unfortunately, it doesn't appear to be in VS2015 (devenv v14)
Update for VS2017: it's back. (devenv v15)
Update for VS2022: In Visual Studio 2022 the name $ReturnValue in watch window works, but it needs to be added to the watch window BEFORE "return" statement is hit, not after. (according to Andrew)
Context
Stack Overflow Q#268048, score: 342
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