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标题: Entity Framework出错Validation failed for one or more entities

作者: dnawo

日期: 2012-09-08 05:32 PM

分类: Win编程

内容: 使用Entity Framework保存记录时出错，提示：
引用内容Validation failed for one or more entities. See 'EntityValidationErrors' property for more details.
详细信息中没显示是哪个字段验证出错：
Validation failed for one or more entities解决方法
复制内容到剪贴板 程序代码try
{
    Context.SaveChanges();
}
catch (DbEntityValidationException ex)
{
    StringBuilder errors = new StringBuilder();
    IEnumerable<DbEntityValidationResult> validationResult = ex.EntityValidationErrors;
    foreach (DbEntityValidationResult result in validationResult)
    {
        ICollection<DbValidationError> validationError = result.ValidationErrors;
        foreach (DbValidationError err in validationError)
        {
            errors.Append(err.PropertyName + ":" + err.ErrorMessage + "\r\n");
        }
    }
    Console.WriteLine(errors.ToString());
    //简写
    //var validerr = ex.EntityValidationErrors.First().ValidationErrors.First();
    //Console.WriteLine(validerr.PropertyName + ":" + validerr.ErrorMessage);
}
结果显示：
引用内容Imsi:The field Imsi must be a string or array type with a maximum length of '20'

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