/// <summary>
/// 获取指定类型的数据上下文对象
/// </summary>
/// <param name="resolveOptions">上下文解析选项</param>
/// <returns></returns>
public IDbContext Resolve(DbContextResolveOptions resolveOptions)
{
Type dbContextType = resolveOptions.DbContextType;
IDbContextOptionsBuilderCreator builderCreator = _serviceProvider.GetServices <IDbContextOptionsBuilderCreator>()
.FirstOrDefault(m => m.Type == resolveOptions.DatabaseType);
if (builderCreator == null)
{
throw new OsharpException($"无法解析类型为“{resolveOptions.DatabaseType}”的 {typeof(IDbContextOptionsBuilderCreator).FullName} 实例");
}
DbContextOptionsBuilder optionsBuilder = builderCreator.Create(resolveOptions.ConnectionString, resolveOptions.ExistingConnection);
DbContextModelCache modelCache = _serviceProvider.GetService <DbContextModelCache>();
IModel model = modelCache.Get(dbContextType);
if (model != null)
{
optionsBuilder.UseModel(model);
}
DbContextOptions options = optionsBuilder.Options;
//创建上下文实例
if (!(ActivatorUtilities.CreateInstance(_serviceProvider, dbContextType, options) is DbContext context))
{
throw new OsharpException($"实例化数据上下文“{dbContextType.AssemblyQualifiedName}”失败");
}
return(context as IDbContext);
}
/// <summary>
/// 获取指定类型的数据上下文对象
/// </summary>
/// <param name="resolveOptions">上下文解析选项</param>
/// <returns></returns>
public DbContext Resolve(DbContextResolveOptions resolveOptions)
{
Type dbContextType = resolveOptions.DbContextType;
IDbContextOptionsBuilderCreator builderCreator = _serviceProvider.GetServices <IDbContextOptionsBuilderCreator>()
.FirstOrDefault(m => m.Type == resolveOptions.DatabaseType);
if (builderCreator == null)
{
throw new OsharpException($"无法解析类型为“{resolveOptions.DatabaseType}”的 {typeof(IDbContextOptionsBuilderCreator).FullName} 实例");
}
DbContextOptions options = builderCreator.Create(resolveOptions.ConnectionString, resolveOptions.ExistingConnection).Options;
DbContext context = ActivatorUtilities.CreateInstance(_serviceProvider, dbContextType, options) as DbContext;
if (context == null)
{
throw new OsharpException($"实例化数据上下文“{dbContextType.AssemblyQualifiedName}”失败");
}
return(context);
}