CODEWITHSUNDEEP
c#.netvb.net
user3323234
user3323234

Reputation: 3

What is happening when there is a conversion between types in VB.NET?

I have to convert a VB.NET String variable into a type of SqlChars (a built-in VB.NET type).

The code I am using is:

Dim sqlPolyStr As String
sqlPolyStr = "POLYGON((" & ptsStr & "))"
Dim sqlChrsPoly As New SqlChars(sqlPolyStr)

The code works fine, I just wondered if there is a name for the process of conversion between types that is taking place?

Upvotes: 0

Views: 82

Answers (1)

Dan Drews
Dan Drews

Reputation: 1976

While I know what you're talking about, this isn't a great example because that's not quite converting the object, it is using a constructor and that constructor is doing stuff in the background.

A better example is dim a as integer = cType("12345", integer) This process is known as typecasting and more details can be found here. My example is still poor because in vb.net you can still do dim a as integer = "12345" but it's a start for you.

The example you gave uses the constructor. Whoever programmed "SqlChars" made a constructor that accepts type String by making a sub such as

Public Sub New(ByVal str as string)
   ' DO something here with the string to make a SqlChars object
End Sub

Upvotes: 1

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