How do you declare a Char literal in Visual Basic .NET?
A character literal is entered using a single character string suffixed with a C. Dim theLetterA As Char = “A”C
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VB.NET – How to move to next item a For Each Loop?
For Each I As Item In Items If I = x Then Continue For ‘ Do something Next
Performance difference between IIf() and If
VB has the following If statement which the question refers to, I think: ‘ Usage 1 Dim result = If(a > 5, “World”, “Hello”) ‘ Usage 2 Dim foo = If(result, “Alternative”) The first is basically C#’s ternary conditional operator and the second is its coalesce operator (return result unless it’s Nothing, in which case … Read more
Is there a VB.NET equivalent of C# out parameters?
No, there is no equivalent of the out keyword in VB. However, VB does automatically initialise all local variables in a method, so you can use ByRef without needing to explicitly initialise the variable first. Example: Sub Main() Dim y As Integer Test(y) End Sub Sub Test(ByRef x As Integer) x = 42 End Sub … Read more
Or versus OrElse
OrElse is a short-circuiting operator, Or is not. By the definition of the boolean ‘or’ operator, if the first term is True then the whole is definitely true – so we don’t need to evaluate the second term. OrElse knows this, so doesn’t try and evaluate temp = 0 once it’s established that temp Is … Read more
Equivalent VB keyword for ‘break’
In both Visual Basic 6.0 and VB.NET you would use: Exit For to break from For loop Wend to break from While loop Exit Do to break from Do loop depending on the loop type. See Exit Statements for more details.
Difference between DirectCast() and CType() in VB.NET
The first thing to note is VB.NET does not have a direct analog to C#’s (type)instance casting mechanism. I bring this up because it’s useful as a starting point and common reference in comparing the two VB.NET operators (and they are operators, not functions, even though they have function semantics). DirectCast() is more strict than … Read more
What is the difference between “instantiated” and “initialized”?
Value vis-a-vis Reference Types Variables in C# are in 1 of 2 groups. Value types or Reference types. Types like int and DateTime are value types. In contrast, any class you create is a reference type. C# strings are also a reference type. Most things in the .NET framework are reference types. Parts of a … Read more
.NET Core doesn’t know about Windows 1252, how to fix?
To do this, you need to register the CodePagesEncodingProvider instance from the System.Text.Encoding.CodePages package. To do that, install the System.Text.Encoding.CodePages package: dotnet add package System.Text.Encoding.CodePages Then (after implicitly or explicitly running dotnet restore) you can call: Encoding.RegisterProvider(CodePagesEncodingProvider.Instance); var enc1252 = Encoding.GetEncoding(1252); Alternatively, if you only need that one code page, you can get it directly, … Read more
Write text files without Byte Order Mark (BOM)?
In order to omit the byte order mark (BOM), your stream must use an instance of UTF8Encoding other than System.Text.Encoding.UTF8 (which is configured to generate a BOM). There are two easy ways to do this: 1. Explicitly specifying a suitable encoding: Call the UTF8Encoding constructor with False for the encoderShouldEmitUTF8Identifier parameter. Pass the UTF8Encoding instance … Read more