check for type=string

[Anonymous]

Which is the recommended way in C# to test if an object is of type string?

In VB.NET I wrote "If TypeOf obj Is String Then".
That meets the requirements:
1. You don't have to instance an object.
2. Doesn't throw exception if obj is null.

I havn't found any solution to that in C#. Does it exist any simple syntax?

[Jon Skeet [C# MVP]]

Anonymous <bi***@microsoft.comwrote:

Which is the recommended way in C# to test if an object is of type string?

In VB.NET I wrote "If TypeOf obj Is String Then".
That meets the requirements:
1. You don't have to instance an object.
2. Doesn't throw exception if obj is null.

I havn't found any solution to that in C#. Does it exist any simple syntax?

Do you want it to return true if obj is a null reference? If so:

if (obj == null || obj is string)

Otherwise

if (obj is string)

--
Jon Skeet - <sk***@pobox.com>
Web site: http://www.pobox.com/~skeet
Blog: http://www.msmvps.com/jon.skeet
C# in Depth: http://csharpindepth.com

[=?ISO-8859-1?Q?G=F6ran_Andersson?=]

Anonymous wrote:

Which is the recommended way in C# to test if an object is of type string?

In VB.NET I wrote "If TypeOf obj Is String Then".
That meets the requirements:
1. You don't have to instance an object.
2. Doesn't throw exception if obj is null.

I havn't found any solution to that in C#. Does it exist any simple syntax?

You can either use the is or as operator, depending on if you later have
use for a reference to the string:

if (obj is string) {
...
}

or

string s = obj as string;
if (s != null) {
...
}

--
Göran Andersson
_____
http://www.guffa.com