Shulou(Shulou.com)06/02 Report--

In this issue, the editor will bring you the application method of how to analyze the conditional compilation of VB.NET. The article is rich in content and analyzes and narrates it from a professional point of view. I hope you can get something after reading this article.

VB.NET programming language is a new programming language introduced by Microsoft, which has object-oriented characteristics and the same operating mechanism as Java, which greatly meets the programming needs of developers. First of all, let's analyze in detail what changes the language has brought to us through the interpretation of VB.NET conditional compilation.

You can use VB.NET conditional compilation to select specific code sections for compilation and exclude other code sections. For example, you may need to write debug statements to compare the speed of different methods for the same programming task, or you may need to localize an application for multiple languages. Conditional compilation statements are designed to run at compile time (not at run time).

Use the # Const directive to declare conditional compiler constants in your code, and use the # If...Then...#Else directive to represent the block of code that will be conditionally compiled by VB.NET. For example, to create French and German versions of the same application from the same source code, use the predefined constants FrenchVersion and GermanVersion to embed platform-specific code snippets into the # If...Then statement. The following example shows the method of embedding:

Visual Basic # If FrenchVersion Then'. # ElseIf GermanVersion Then'. # Else'. # End If

If the value of the FrenchVersion constant is set to True at compile time, the French version of the conditional code is compiled. If the value of the GermanVersion constant is set to True, the compiler uses the German version. If neither is set to True, run the code in the Else block of *.

Be careful

If the code is not part of the current branch, automatic completion will not work when editing the code and using VB.NET conditional compilation instructions.

The above is the editor for you to share how to analyze the application of VB.NET conditional compilation, if you happen to have similar doubts, you might as well refer to the above analysis to understand. If you want to know more about it, you are welcome to follow the industry information channel.

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