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IronBarcode - System.Drawing.Common 的替代方案

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Iron Software 发布了 System.Drawing.Common 的开源替代品。欲了解更多有关 IronDrawing、 点击这里.

从 .NET 6.0 开始、 System.Drawing.Common 只能在 Windows 上运行.

  • 在非 Windows 操作系统上，除非设置了运行时配置开关，否则会抛出 TypeInitializationException 异常，并将 PlatformNotSupportedException 异常作为内部异常。
  • 在 .NET 6 中，当引用代码编译为非 Windows 操作系统时，平台分析器会发出编译时警告。此外，除非设置了配置选项，否则会抛出以下运行时异常：
System.TypeInitializationException : The type initializer for 'Gdip' threw an exception.
          ---- System.PlatformNotSupportedException : System.Drawing.Common is not supported on non-Windows platforms. See https://aka.ms/systemdrawingnonwindows for more information.
Stack Trace:
            at System.Drawing.SafeNativeMethods.Gdip.GdipCreateBitmapFromFile(String filename, IntPtr& bitmap)
          /_/src/libraries/System.Drawing.Common/src/System/Drawing/Bitmap.cs(42,0): at System.Drawing.Bitmap..ctor(String filename, Boolean useIcm)
          /_/src/libraries/System.Drawing.Common/src/System/Drawing/Bitmap.cs(25,0): at System.Drawing.Bitmap..ctor(String filename)
          /_/src/libraries/System.Resources.ResourceManager/tests/ResourceManagerTests.cs(270,0): at System.Resources.Tests.ResourceManagerTests.EnglishImageResourceData()+MoveNext()
          /_/src/libraries/System.Linq/src/System/Linq/Select.cs(136,0): at System.Linq.Enumerable.SelectEnumerableIterator`2.MoveNext()
----- Inner Stack Trace -----
          /_/src/libraries/System.Drawing.Common/src/System/Drawing/LibraryResolver.cs(31,0): at System.Drawing.LibraryResolver.EnsureRegistered()
          /_/src/libraries/System.Drawing.Common/src/System/Drawing/GdiplusNative.Unix.cs(65,0): at System.Drawing.SafeNativeMethods.Gdip.PlatformInitialize()
          /_/src/libraries/System.Drawing.Common/src/System/Drawing/Gdiplus.cs(27,0): at System.Drawing.SafeNativeMethods.Gdip..cctor()

临时解决办法：通过在 runtimeconfig.json 文件中将 System.Drawing.EnableUnixSupport 运行时配置开关设置为 true，启用对非 Windows 平台的支持：

{
         "runtimeOptions": {
            "configProperties": {
               "System.Drawing.EnableUnixSupport": true
            }
         }
      }

该解决方案是 Microsoft 目前在 .NET 6 中支持 System.Drawing 的解决方案：

https://docs.microsoft.com/en-us/dotnet/core/compatibility/core-libraries/6.0/system-drawing-common-windows-only