Expression expected using linq

Question

I'm trying to remove the lines from a text file that contains a specific word using vb.net. I have this done using c#

c#

var oldLines = System.IO.File.ReadAllLines(TemporaryLBL);
var newLines = oldLines.Where(line => !line.Contains("$PhysicsNo#"));
System.IO.File.WriteAllLines(TemporaryLBL, newLines);

vb.net

Dim oldLines = System.IO.File.ReadAllLines(TemporaryLBL)
Dim newLines = oldLines.Where(Function(line) Return Not line.Contains("$PhysicsNo#") End Function)
System.IO.File.WriteAllLines(TemporaryLBL, newLines)

Not sure if this is the correct way to do it, so far I'm getting an error on the Function part: Expression expected.

Function(line) Not line.Contains("$PhysicsNo#")) should do it. — Saragis
– Saragis, Commented Aug 11, 2015 at 16:33
In case you're not aware of it: converter.telerik.com - using that confirms @Saragis's comment, which ought to be the answer :) — James Thorpe
– James Thorpe, Commented Aug 11, 2015 at 16:35
You're trying to define a function in place of a lambda expression. You'll need to review what the lambda syntax looks like. — Jeff Mercado
– Jeff Mercado, Commented Aug 11, 2015 at 16:36

Coding Duchess · Accepted Answer · 2015-08-11 17:59:16Z

1

IO.File.WriteAllLines(TemporaryLBL, IO.File.ReadAllLines(TemporaryLBL).Where(Function(line) Not line.Contains("$PhysicsNo#")))

you could also try:

Dim oldLines = System.IO.File.ReadAllLines(TemporaryLBL)
Dim newLines = From line In oldLines Where (Not line.Contains("$PhysicsNo#"))
System.IO.File.WriteAllLines(TemporaryLBL, newLines)

edited Aug 11, 2015 at 17:59

answered Aug 11, 2015 at 16:35

Coding Duchess

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4 Comments

Coding Duchess Over a year ago

I just tested it and it worked for me. Is it run-time error or compile error?

Somebody Over a year ago

Compile error: Expression expected. In fact when typing the word Fuction appears underline with the before error

Coding Duchess Over a year ago

is it Windows or Webb application? Can you post your exact code? All of it. I tried using the line above and it worked in windows app. without importing any libraries

Coding Duchess Over a year ago

check my update. it does not use the word function but produces the same output

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