[Windows question-3] C # converting to a DLL file

[Windows question-3] C # converting to a DLL file

Problem:This article consists of two parts: the first part describes how to convert a C # program file into a DLL dynamic link library file, and the second part describes how to use the generated DLL file in the program.

Part 1:

1. Create a new C # file "show. cs", which is the source file to be converted to the DLL file. The file content is as follows:

using System;namespace Dll{    public class Show    {        public String hello = "hello world\n";        public String Message()        {            return "Welcom C# dll\n";        }    }}

2. Convert the CEN file into a DLL file. Use the csc.exe file that comes with Windows. Generally, the path of this file is "C: \ Windows \ Microsoft. NET \ Framework \ v2.0.50727 \ csc.exe ". For ease of use, we add this PATH to the PATH environment variable of the system. The specific method is "computer", right-click "properties", "Advanced System settings", "environment variables", "system variables", select "Path", and "edit ", add the preceding path to the end of the string. NOTE: If there is no semicolon at the end of the string, you must manually add an English semicolon.

3. Open cmd.exe and enter csc/t: library/r: System. Web. dll/out: d: \ Test \ show. dll d: \ Test \ show. cs in the command line.

PS:

/T: library: This indicates that we want to convert the c # file into a class library.

/R: System. Web. dll l: This dll is referenced in the cs file.

/Out: d: \ Test \ show. dll: directory of the output dll file

D: \ Test \ show. cs: Location of the C # file to be converted

After the command is executed, the show. dll file is generated at the specified position.

Part 2:

1. Create a new C # file test. cs with the following content:

using System;using System.Data;using Dll;public class GetMessage{    public static void Main() {        Show sw = new Show();Console.Write(sw.Message());Console.Write(sw.hello);                Console.Read();    }}

Note: The using Dll Declaration uses the Dll namespace, which is defined in show. cs.

Console. Read (); to prevent the Dos debugging window from flashing.

2. Enter csc/r: show. dll/r: system. dll test. cs in the cmd command line.

This command allows test.csto use the show.dll file and generate a test.exe executable file.

3.double-click the test.exe file to view the corresponding execution result.