C# determines whether an executable is present in the Windows environment variable

Little scum · Posted on 3/25/2020 4:22:03 PM

We are able to open the command window normally by pressing the Windows key + R, typing cmd, because cmd.exe executable is in our environment variables.

Some commands entered through the cmd window are also the corresponding executable files under the call environment variable.

Windows can determine whether an executable file exists by using the where command to determine whether there is an environment variable through cmd, as follows:

C:\Users>where cmd
C:\Windows\System32\cmd.exe

C:\Users>where sqlcmd
c:\Program Files\Microsoft SQL Server\100\Tools\Binn\SQLCMD.EXE
C:\Program Files\Microsoft SQL Server\Client SDK\ODBC\170\Tools\Binn\SQLCMD.EXE

C:\Users>where sqlcmd.exe
c:\Program Files\Microsoft SQL Server\100\Tools\Binn\SQLCMD.EXE
C:\Program Files\Microsoft SQL Server\Client SDK\ODBC\170\Tools\Binn\SQLCMD.EXE

C:\Users>where itsvse
INFO: Could not find files for the given pattern(s).

If you use .net/c# code, the code looks like this:

Login is visible.

Call:

ExistsOnPath("notepad.exe"); // should return true

GetFullPath("notepad.exe"); // c:\windows\system32\notepad.exe

Note: When calling with C# code,Must bring the extension，Case insensitive。

[Console Program] C# determines whether an executable is present in the Windows environment variable

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