StringExtension

StringExtension

overview

This class is a collection of methods (MidB, LenB, etc.) for manipulating strings in bytes in C#/VB. Half-width characters are treated as 1 byte long, and full-width characters are treated as 2 bytes long.

Since it is implemented as an extension method, the readability of the code increases. You can write your code as a method chain.

Usage and code examples (C#)

First, you need to make this extension method available in the using directive.

 using StringExtension ;

Call the method as follows.

 string text = "半角1バイト/全角2バイト" ;

Console . WriteLine ( $ "text のバイト数は { text . LenB ( ) } " ) ; // 出力: "text のバイト数は 23"
Console . WriteLine ( text . MidB ( 3 , 7 ) ) ; // 出力: "1バイト"
Console . WriteLine ( text . LeftB ( 5 ) ) ; // 出力: "半角1"
Console . WriteLine ( text . RightB ( 11 ) ) ; // 出力: "全角2バイト"

With method chaining.

 Console . WriteLine ( text . MidB ( 3 , 7 ) . LenB ( ) . ToString ( ) ) ; // 出力: "7" 

Usage and code examples (VB)

You must first make this extension method available in the Imports statement.

 Imports StringExtension

Call the method as follows.

 Dim text As String = "半角1バイト/全角2バイト"

Console.WriteLine( $ "text のバイト数は {text.LenB()}" ) ' 出力: "text のバイト数は 23"
Console.WriteLine(text.MidB( 3 , 7 )) ' 出力: "1バイト"
Console.WriteLine(text.LeftB( 5 )) ' 出力: "半角1"
Console.WriteLine(text.RightB( 11 )) ' 出力: "全角2バイト"

With method chaining.

 Console.WriteLine(text.MidB( 3 , 7 ).LenB().ToString()) ' 出力: "7" 

Target framework

• .NET Framework 3.5～
• .NET Standard 1.3~

How to install

1. Download the latest version of the source code from the download page.
2. Add it to the project you will use in either of the following steps.

• Extract StringExtension.cs or StringExtension.vb from your source code and add it to your project.
• Compile the source code and add the generated StringExtension.dll and StringExtension.xml to the references in your project.

Source code folder structure

• projects folder
  • This is a folder that stores project files divided by target framework.
  • StringExtension.sln : Solution implemented in C#.
  • StringExtensionVB.sln : Solution implemented in VB. However, the test code is in C#.
• src folder
  • This is the folder that stores the main source code. Links are referenced from each project.
• test folder
  • This is a folder containing test code using NUnit. Links are referenced from each project.

About license

Released under the MIT license.

release notes

1.0.3 (2018/2/15)

• Corrected to avoid compile error in C#3.0.
  • Change nameof operator to string literal.
  • Change method implementation using expression format to normal implementation.
• Fixed to avoid compile error in VB2008 (9.0).
  • Changed NameOf operator to string literal.
  • Changed the description to not use Global in the namespace.
  • Add ByVal keyword (no problem even if you don't have it).

1.0.2 (2018/2/13)

• Added implementation in VB.

1.0.1 (2018/2/10)

• Compatible with .NET Framework 3.5.

1.0.0 (2018/1/8)

• Implemented PadLeftB, PadRightB, FixLeftB, FixRightB methods.

alpha 2 (2017/12/10)

• Implemented LeftB, RightB methods.

alpha 1 (2017/12/3)

• Implemented LenB, MidB methods.