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  3. IronBarcode - 替代 System.Drawing.Common

IronBarcode - System.Drawing.Common 的替代方案

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Iron Software 已經推出了一款開源的 System.Drawing.Common 替代品。要了解有關 IronDrawing 的更多資訊， 點擊這裡從 .NET 6 開始， System.Drawing.Common 只適用於 Windows- 在非 Windows 操作系統上，除非您設置運行時配置開關，否則會拋出 TypeInitializationException 異常，內部異常為 PlatformNotSupportedException。

  • 在 .NET 6 中，當引用代碼在非 Windows 操作系統上編譯時，平臺分析器會發出編譯時警告。此外，除非您設置配置選項，否則會拋出以下運行時異常：
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()

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

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

此解決方案是微軟目前在 .NET 6 中對 System.Drawing 支援的解決方案：

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