c# - Serilog Net Core 附加列问题

Question

我正在为 .NET Core 2 使用 Serilog SQL Server Sink。

我已经在 Program.cs 和 Startup.cs 中配置了 Serilog.Logger，如下所示:

ColumnOptions columnOptions = new ColumnOptions();

columnOptions.AdditionalDataColumns = new System.Collections.Generic.List<DataColumn>();
columnOptions.AdditionalDataColumns.Add(new DataColumn() { ColumnName = "UserId", DataType = typeof(string) });            
Log.Logger = new LoggerConfiguration()               
   .WriteTo.MSSqlServer("Data Source=TS-ABC\\SQLExpress;Initial Catalog=XYZ;Integrated Security=True",
    "ActivityLogs", columnOptions: columnOptions, autoCreateSqlTable: false, restrictedToMinimumLevel: Serilog.Events.LogEventLevel.Debug)
.CreateLogger();

在Sstartup.cs中:

services.AddSingleton<Serilog.ILogger>(x =>
{
    ColumnOptions columnOptions = new ColumnOptions();

    columnOptions.AdditionalDataColumns = new System.Collections.Generic.List<DataColumn>();                
    columnOptions.AdditionalDataColumns.Add(new DataColumn() { ColumnName = "UserId", DataType = typeof(string) });

    return new LoggerConfiguration().WriteTo.MSSqlServer(Configuration["Data:DefaultConnection:ConnectionString"], Configuration["Serilog:TableName"], autoCreateSqlTable: false, columnOptions: columnOptions, restrictedToMinimumLevel: Serilog.Events.LogEventLevel.Debug).CreateLogger();
});

UserId 是 string 类型并允许空值。它也是 ActivityLogs 表中的 FK。

这就是我记录信息的方式:

Log.Information("This has properties attached");

只要添加附加列 "UserId"，代码就可以正常工作。 UserId 列已存在于我的数据库中。

这是我在 Visual Studio 的输出窗口中看到的错误:

Unable to write 50 log events to the database due to following error: The given key was not present in the dictionary.

更新到 Serilog.Sinks.MSSqlServer nuget 包后，我现在收到以下错误并且数据库中没有任何记录。

Unable to write 1 log events to the database due to following error: The given ColumnMapping does not match up with any column in the source or destination.

任何解决方案、提示或解决方法将不胜感激。

Answer 1

.net core 的不可空附加列的问题。将您的字段设置为 Nullable。