本文整理汇总了C#中System.Data.DbContext.SaveChangesAsync方法的典型用法代码示例。如果您正苦于以下问题：C# DbContext.SaveChangesAsync方法的具体用法？C# DbContext.SaveChangesAsync怎么用？C# DbContext.SaveChangesAsync使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类System.Data.DbContext的用法示例。
在下文中一共展示了DbContext.SaveChangesAsync方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: SubmitChangesAsync
/// <summary>
/// Submits the change through Entity Framework while logging any exceptions
/// and produce appropriate <see cref="HttpResponseMessage"/> instances.
/// </summary>
/// <returns>A <see cref="Task"/> representing the operation.</returns>
public static async Task<int> SubmitChangesAsync(DbContext context, HttpRequestMessage request, Func<DbUpdateConcurrencyException, object> getOriginalValue)
{
HttpConfiguration config = request.GetConfiguration();
ITraceWriter traceWriter = config.Services.GetTraceWriter();
try
{
int result = await context.SaveChangesAsync();
return result;
}
catch (DbEntityValidationException ex)
{
string validationDescription = EntityUtils.GetValidationDescription(ex);
string validationError = EFResources.DomainManager_ValidationError.FormatForUser(validationDescription);
traceWriter.Debug(validationError, request, LogCategories.TableControllers);
HttpResponseMessage invalid = request.CreateErrorResponse(HttpStatusCode.BadRequest, validationError, ex);
throw new HttpResponseException(invalid);
}
catch (DbUpdateConcurrencyException ex)
{
string conflictError = EFResources.DomainManager_ChangeConflict.FormatForUser(ex.Message);
traceWriter.Info(conflictError, request, LogCategories.TableControllers);
var content = getOriginalValue != null ? getOriginalValue(ex) : conflictError;
HttpStatusCode statusCode = GetConflictStatusCode(request);
HttpResponseMessage conflict = request.CreateResponse(statusCode, content);
throw new HttpResponseException(conflict);
}
catch (DbUpdateException ex)
{
HttpResponseMessage error;
Exception baseEx = ex.GetBaseException();
SqlException sqlException = baseEx as SqlException;
if (sqlException != null && sqlException.Number == SqlUniqueConstraintViolationError)
{
string message = CommonResources.DomainManager_Conflict.FormatForUser(sqlException.Message);
error = request.CreateErrorResponse(HttpStatusCode.Conflict, message);
traceWriter.Info(message, request, LogCategories.TableControllers);
}
else
{
string message = EFResources.DomainManager_InvalidOperation.FormatForUser(baseEx.Message);
error = request.CreateErrorResponse(HttpStatusCode.BadRequest, message);
traceWriter.Error(message, request, LogCategories.TableControllers);
}
throw new HttpResponseException(error);
}
}