实体框架-将EntityValidationErrors打印到日志
实体框架-将EntityValidationErrors打印到日志
提问于 2012-12-12 01:36:14
打印日志时出现follo0wing错误
Message: Validation failed for one or more entities. See 'EntityValidationErrors'
property for more details.; Stack Trace: at
System.Data.Entity.Internal.InternalContext.SaveChanges()EntityValidationErrors对象在不同的节点中保存完整的详细错误。打印它的最佳方式是什么？
回答 3
Stack Overflow用户
回答已采纳
发布于 2013-09-11 15:59:08
更清晰的语法：
catch (System.Data.Entity.Validation.DbEntityValidationException ex)
{
Logger.WriteError("{0}{1}Validation errors:{1}{2}", ex, Environment.NewLine, ex.EntityValidationErrors.Select(e => string.Join(Environment.NewLine, e.ValidationErrors.Select(v => string.Format("{0} - {1}", v.PropertyName, v.ErrorMessage)))));
throw;
}Stack Overflow用户
发布于 2014-01-24 17:40:00
下面是一些扩展方法：
/// <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);
}用法1:
catch(DbEntityValidationException e) {
Logger.WriteError(e.DbEntityValidationExceptionToString());
throw;
}应输出：
StackTrace
Validation errores:
[EntityName]
- [Property - ErrorMessage]
- [Property - ErrorMessage]
[EntityName2]
- [Property - ErrorMessage]
- [Property - ErrorMessage]用法2:
catch(DbEntityValidationException e) {
Logger.WriteError(e.DbEntityValidationResultToString());
throw;
}应输出：
[EntityName]
- [Property - ErrorMessage]
- [Property - ErrorMessage]
[EntityName2]
- [Property - ErrorMessage]
- [Property - ErrorMessage]Stack Overflow用户
发布于 2012-12-12 01:40:48
你可以试试这样的东西
foreach (var failure in ex.EntityValidationErrors)
{
string validationErrors="";
foreach (var error in failure.ValidationErrors)
{
validationErrors+=error.PropertyName+" "+error.ErrorMessage;
}
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/13825495
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