Assign property by reference

[wriedmann]

Hi,

I have a LOT of such statements in one of my X# applications:

Code: Select all

if oRow:HasRow( "produkt" )
  self:Produkt := oRow:GetString( "produkt" )
endif

Hoping to simplify that code I have tried to pass the property by reference, but in C# this is not allowed ( and therefore it is also not allowed in X#). Strangely VB.NET allows this....

The only possibility seems to be to use Reflection.

Maybe someone of you has a better idea how to solve this with an one-liner, without using Reflection.

Wolfgang

[robert]

Wolfgang,
Have you tried the preprocessor:
Something like

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#command GETSTRING <oObject> <cColname> => IF <oObject>:HasRow(<(cColName)> ) ;;
                   SELF:<cColName> := <oObject>:GetRow(<(cColName)> ) ; ENDIF

Robert

[wriedmann]

Hi Robert,

thank you yery much!

This command works:

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#command SETSTRING <oProperty> <oRow> <cColname> => IF <oRow>:HasRow(<(cColName)> ) ;;
                   <oProperty> := <oRow>:GetString(<(cColName)> ) ; endif

and the relative code:

Code: Select all

SetString self:Produkt oRow "produkt"

Thank you very much!

Wolfgang

[wriedmann]

Hi Robert,

this the entire method now:

FillFromDataRow.png (15.45 KiB) Viewed 516 times

The statement has not only the advantage to keep the code shorter and much more readable, but also to make it more robust in case of future changes - it is much less error prone.
Thank you again!
Wolfgang

[robert]

Wolfgang,

Nice.
And if you had used Visual Studio, then the UDC keywords SetInt, SetString etc would have been shown in the keyword color.

Robert

[Chris]

Nice.
And if you had used Visual Studio, then the UDC keywords SetInt, SetString etc would have been shown in the keyword color.

Wolfgang knows how to do this in XIDE as well

[wriedmann]

Hi Robert,

Visual Studio has several advantages over XIDE - I'm aware of that.
But for me the speed and some of the advantages of XIDE over Visual Studio are much more important, so I prefer to continue with XIDE.
And personally I see it as a big advantage that X# has also its own IDE, specially for people coming from VO.
Wolfgang

[robert]

Wolfgang,

I know. I was just teasing...

Robert