C#'s equivalent to VB.Net's DirectCast?
- by Collin Sauve
This has probably been asked before, but if it has, I can't find it.
Does C# have an equivalent to VB.Net's DirectCast?
I am aware that it has () casts and the 'as' keyword, but those line up to CType and TryCast.
To be clear, these keywords do the following;
CType/() casts: If it is already the correct type, cast it, otherwise look for a type converter and invoke it. If no type converter is found, throw an InvalidCastException.
TryCast/"as" keyword: If it is the correct type, cast it, otherwise return null.
DirectCast: If it is the correct type, cast it, otherwise throw an InvalidCastException.
EDIT: After I have spelled out the above, some people have still responded that () is equivalent, so I will expand further upon why this is not true.
DirectCast only allows for either Narrowing or Widening conversions on inheritance tree, it does not support conversions across different branches like () does.
ie:
C#, this compiles and runs:
//This code uses a type converter to go across an inheritance tree
double d = 10;
int i = (int)d;
VB.Net, this does NOT COMPILE
'Direct cast can only go up or down a branch, never across to a different one.
Dim d as Double= 10
Dim i as Integer = DirectCast(d, Integer)
The equivalent in VB.Net to my C# code is CType:
'This compiles and runs
Dim d as Double= 10
Dim i as Integer = CType(d, Integer)
(Edit again, I was originally using strings, I changed it to double... sorry)
