CODEWITHSUNDEEP
c#asp.net
user979331
user979331

Reputation: 11961

ASP.NET - Implicitly-typed local variables must be initialized

I have this code Here:

var directories;

if (filePath == "")
{
    directories = Directory.GetDirectories(filePath);
}
else
{
    directories = Directory.GetDirectories(myPath);
}

But I get this error when defining the variable:

Implicitly-typed local variables must be initialized

Why am i getting this error and how would I go about fixing it?

Upvotes: 0

Views: 1170

Answers (4)

Rahul Tripathi
Rahul Tripathi

Reputation: 172628

You should understand that C# is strongly typed language. So compiler could not determine what directories is at compile time.

var keyword was introduced for anonymous type binding at compile time. So if you dont initilize the value of directories it is unknown to the compiler as at runtime the actual type(value or reference) is taken and var is nowhere in the picture.

So you can try like 

string[] directories;

if (filePath == "")
{
    directories = Directory.GetDirectories(filePath);
}

or if you want to use var only then you can use it like this:

var directories = (string)null;

if (filePath == "")
{
    directories = Directory.GetDirectories(filePath);
}

You can also refer MSDN for details: Implicitly Typed Local Variables

Upvotes: 0

Karl Anderson
Karl Anderson

Reputation: 34844

The compiler cannot figure out what type directories is because you did not initialize it.

Try this:

string[] directories;

Upvotes: 0

Colorado Matt
Colorado Matt

Reputation: 349

You can't use var without an assignment. It is the assignment that determines the type of a var. Just change to declare a specific type and you should be good.

Upvotes: 0

Dave Zych
Dave Zych

Reputation: 21897

When using var, the compiler doesn't know what the type of directories is unless you initialize while you declare it. You have to declare a type if you're initializing later.

string[] directories;

if (filePath == "")
{
    directories = Directory.GetDirectories(filePath);
}
//etc

Upvotes: 2

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