[EF]SaveChanges()時若是欄位驗證錯誤將insert db失敗，如何將失敗逐筆顯示
很簡單，照下面這樣寫即可：
try
{
using (YourDBEntities db = new YourDBEntities())
{
db.YourTable.Add(obj1);
db.YourTable.Add(obj2);
db.SaveChanges();
}
}
catch (DbEntityValidationException dbEx)
{
string outPutErrMsg = string.Empty;
DbEntityValidationResult errResult = dbEx.EntityValidationErrors.FirstOrDefault();
foreach(DbValidationError dbValidErr in errResult.ValidationErrors)
{
outPutErrMsg+="PropertyName(欄位名稱):"+dbValidErr.PropertyName + ",";
outPutErrMsg+="ErrorMessage(錯誤訊息):"+dbValidErr.ErrorMessage + ";";
}
Console.WriteLine("DbEntityValidationException occur, insert db失敗!" + outPutErrMsg);
Console.WriteLine("Press any key to continue");
Console.ReadKey();
return;
}
參考資料：
[Entity Framework] 查看DbEntityValidationException發生原因
https://dotblogs.com.tw/wasichris/2015/01/24/148255