添加Serilog文件日志;

更改空blob列插入规则，现在将插入空blob而不是NULL;

ConsoleApp2/ConsoleApp2.csproj

@@ -25,6 +25,7 @@
       <PackageReference Include="Serilog" Version="3.1.2-dev-02097" />
       <PackageReference Include="Serilog.Extensions.Hosting" Version="8.0.0" />
       <PackageReference Include="Serilog.Sinks.Console" Version="5.0.1" />
+      <PackageReference Include="Serilog.Sinks.File" Version="5.0.1-dev-00972" />
       <PackageReference Include="ServiceStack.Text" Version="8.0.0" />
       <PackageReference Include="ZstdSharp.Port" Version="0.7.4" />
     </ItemGroup>

ConsoleApp2/Program.cs

@@ -12,6 +12,7 @@ using Microsoft.Extensions.Logging;
 using MySqlConnector;
 using Serilog;
 using Microsoft.Extensions.Caching.Distributed;
+using Serilog.Events;
 
 
 await RunProgram();
@@ -471,7 +472,12 @@ async Task RunProgram()
     host.Services.AddLogging(builder =>
     {
         builder.ClearProviders();
-        builder.AddSerilog(new LoggerConfiguration().WriteTo.Console().CreateLogger());
+        builder.AddSerilog(new LoggerConfiguration()
+            .WriteTo.Console()
+            .WriteTo.File("./log/error.log", restrictedToMinimumLevel:LogEventLevel.Error)
+            // .WriteTo.File("./log/info.log", restrictedToMinimumLevel:LogEventLevel.Information) //性能考虑暂不使用
+            .CreateLogger()
+        );
     });
 
     host.Services.AddSingleton<ProcessContext>();

ConsoleApp2/Services/MySqlDestination.cs

@@ -128,7 +128,7 @@ public class MySqlDestination : IDisposable, IAsyncDisposable
                             break;
                         case ColumnType.Blob:
                             if (string.IsNullOrEmpty(field))
-                                recordSb.Append("NULL");
+                                recordSb.Append("''");
                             else recordSb.Append($"0x{field}");
                             break;
                         case ColumnType.UnDefine: