Expression expected on if condition

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VB

HeadersLiteral.Text = If(contentType IsNot Nothing ,  "Content-Type: " & contentType & "<br />", String.Empty))
            HeadersLiteral.Text += (If(contentTransferEncoding IsNot Nothing, "Content-Transfer-Encoding: " & contentTransferEncoding, String.Empty)

The error is shown on if condition.
Any one please solve the error and please make an update.

error: experssion expected

Posted 8-Jun-11 19:43pm

mani 4u

Updated 8-Jun-11 21:28pm

Tarun.K.S

v3

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Sergey Alexandrovich Kryukov 9-Jun-11 1:53am

Tag the question properly: language, platform, UI library if applicable, etc.
--SA

2 solutions

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Sergey Alexandrovich Kryukov · Answer 1 · 2011-06-08T19:57:00

Solution 1

Under "if" statement Boolean expression is expected: result of comparison or result of Boolean operator. Isn't that natural? It should be something returning True or False. Instead, you write Boolean expressions delimited by ',' (comma). Comma is not a Boolean operator.

—SA

Posted 8-Jun-11 19:57pm

Sergey Alexandrovich Kryukov

Dave Kreskowiak · Answer 2 · 2011-06-09T01:53:00

Solution 2

If appears as if you wrote your If statements like you were writing them in Excel:

If(condition, returnIfTrue, returnIfFalse)

That's not how it work in VB.NET:

If condition Then
    statementsIfTrue
Else
    statementsIfFalse
End If

Posted 9-Jun-11 1:53am

Dave Kreskowiak