添加DbEntityValidationException 扩展方法
/// <summary>
/// A DbEntityValidationException extension method that formates validation errors to string.
/// </summary>
public static string DbEntityValidationExceptionToString(this DbEntityValidationException e)
{
var validationErrors = e.DbEntityValidationResultToString();
var exceptionMessage = string.Format("{0}{1}Validation errors:{1}{2}", e, Environment.NewLine, validationErrors);
return exceptionMessage;
}
/// <summary>
/// A DbEntityValidationException extension method that aggregate database entity validation results to string.
/// </summary>
public static string DbEntityValidationResultToString(this DbEntityValidationException e)
{
return e.EntityValidationErrors
.Select(dbEntityValidationResult => dbEntityValidationResult.DbValidationErrorsToString(dbEntityValidationResult.ValidationErrors))
.Aggregate(string.Empty, (current, next) => string.Format("{0}{1}{2}", current, Environment.NewLine, next));
}
/// <summary>
/// A DbEntityValidationResult extension method that to strings database validation errors.
/// </summary>
public static string DbValidationErrorsToString(this DbEntityValidationResult dbEntityValidationResult, IEnumerable<DbValidationError> dbValidationErrors)
{
var entityName = string.Format("[{0}]", dbEntityValidationResult.Entry.Entity.GetType().Name);
const string indentation = "\t - ";
var aggregatedValidationErrorMessages = dbValidationErrors.Select(error => string.Format("[{0} - {1}]", error.PropertyName, error.ErrorMessage))
.Aggregate(string.Empty, (current, validationErrorMessage) => current + (Environment.NewLine + indentation + validationErrorMessage));
return string.Format("{0}{1}", entityName, aggregatedValidationErrorMessages);
}
使用Demo
catch(DbEntityValidationException e) {
Logger.WriteError(e.DbEntityValidationExceptionToString());
throw;
}
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