How to provide or
retrieve the local directories of a web server as WebHostEnvironment in a
static class.
guide:
To do this, you
need to create a public static class MyServer with a static property such as
WebHostEnvironment. This property or variable must be set in the startup and is
then always available
Create a Static
Class with the WebHostEnvironment
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using Microsoft.AspNetCore.Hosting;
public static class MyServer
{
public static IWebHostEnvironment WebHostEnvironment
{ get; set; }
}
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Extend Startup.cs
For the
environment variable to be available at run time, the IWebHostEnvironment must
be passed in the Startup >Configure(..).
Startup.cs with
Environment Variable
Here the
IWebHostEnvironment env is passed directly as DependencyInjection when called.
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public Startup(IConfiguration configuration,
IWebHostEnvironment env)
{
Configuration = configuration;
_env = env;
}
public IConfiguration Configuration { get; }
private readonly IWebHostEnvironment _env;
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Query server directory
*In a static
class
Then the general
environment can be queried from each class as here
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string sPath_FFMpegDir = MyServer.WebHostEnvironment.ContentRootPath
+ @"\bin\FFMpeg\";
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using System.Diagnostics; //ProcessStartInfo
public static class Video_Methods
{
public static void Video_create_Thumbnail(string sInputFile, string sOutputFile, string sPath_FFMpeg)
{
//---------------<
Video_create_Thumbnail() >---------------
string sPath_FFMpegDir = MyServer.WebHostEnvironment.ContentRootPath + @"\bin\FFMpeg\";
var startInfo = new ProcessStartInfo
{
FileName = sPath_FFMpegDir + $"ffmpeg.exe",
Arguments = $"-i " + sInputFile + " -an -vf scale=200x112
" +
sOutputFile + "
-ss 00:00:00 -vframes 1",
CreateNoWindow=true,
UseShellExecute=false,
WorkingDirectory=sPath_FFMpegDir
};
using (var process=new Process { StartInfo=startInfo})
{
process.Start();
process.WaitForExit();
}
//---------------</
Video_create_Thumbnail() >---------------
}
}
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Standard Startup.cs
without Hosting Environment
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public Startup(IConfiguration configuration)
{
Configuration = configuration;
}
public IConfiguration Configuration { get; }
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