Exists. Confused about this ...

  • Thread starter Thread starter shapper
  • Start date Start date
S

shapper

Hello,

I have a filename and I need to check if it is of a specific type.

I have:

public static Boolean FileType(String filename, String[] types) {
return types.Length == 0 ? false : Array.Exists(types, s =>
String.Compare(s, Path.GetExtension(filename).TrimStart('.'), true) ==
0);
} // FileType

So if filename="document.pdf" and types = new string[] { "gif, pdf,
png, swf" } then it should return true because the document is a pdf
and pdf exists in types.

However, this is returning false.

I am a little bit confused on this. Should I add != 0 ... or maybe do
this in other way?

Thanks,
Miguel
 
Hello,

I have a filename and I need to check if it is of a specific type.

I have:

    public static Boolean FileType(String filename, String[] types) {
      return types.Length == 0 ? false : Array.Exists(types, s =>
String.Compare(s, Path.GetExtension(filename).TrimStart('.'), true) ==
0);
    } // FileType

So if filename="document.pdf" and types = new string[] { "gif, pdf,
png, swf" } then it should return true because the document is a pdf
and pdf exists in types.

However, this is returning false.
Click to expand...

As it should. Your 'array' being passed in is a single string of gif,
pdf, png, swf.

What you wanted, I think, was this:

string[] types = new string[] { "gif", "pdf", "png",
"swf" };

which is an array of four different strings.

matt
 
Hello,
Click to expand...
I have a filename and I need to check if it is of a specific type.
Click to expand...
I have:
Click to expand...
    public static Boolean FileType(String filename, String[] types){
      return types.Length == 0 ? false : Array.Exists(types, s =>
String.Compare(s, Path.GetExtension(filename).TrimStart('.'), true) ==
0);
    } // FileType
Click to expand...
So if filename="document.pdf" and types = new string[] { "gif, pdf,
png, swf" } then it should return true because the document is a pdf
and pdf exists in types.
Click to expand...
However, this is returning false.
Click to expand...

As it should. Your 'array' being passed in is a single string of gif,
pdf, png, swf.

What you wanted, I think, was this:

            string[] types = new string[] { "gif", "pdf", "png",
"swf" };

which is an array of four different strings.

matt
Click to expand...

Of course,

Thanks.
 
Matt said:
Hello,

I have a filename and I need to check if it is of a specific type.

I have:

public static Boolean FileType(String filename, String[] types) {
return types.Length == 0 ? false : Array.Exists(types, s =>
String.Compare(s, Path.GetExtension(filename).TrimStart('.'), true) ==
0);
} // FileType

So if filename="document.pdf" and types = new string[] { "gif, pdf,
png, swf" } then it should return true because the document is a pdf
and pdf exists in types.

However, this is returning false.
Click to expand...

As it should. Your 'array' being passed in is a single string of gif,
pdf, png, swf.

What you wanted, I think, was this:

string[] types = new string[] { "gif", "pdf", "png",
"swf" };

which is an array of four different strings.
Click to expand...

<sarcasm>
_Everyone_ knows that commas go inside quotes.
http://www.flounder.com/bricks.htm
 
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