public IEnumerable <ValidationResult> Validate(ValidationContext validationContext)
{
CustomerEntities db = new CustomerEntities();
var email = db.客戶聯絡人.Where(x => x.Email == this.Email).FirstOrDefault();
if (email != null)
{
yield return(new ValidationResult("Email欄位重複，請重新輸入", new string[] { "Email" }));
}
}
public IEnumerable <ValidationResult> Validate(ValidationContext validationContext)
{
CustomerEntities db = new CustomerEntities();
var existdata = db.客戶聯絡人.Where(c => c.Email == Email);
if (existdata.Any())
{
yield return(new ValidationResult(
"同一個客戶下的聯絡人，其 Email 不能重複", new[] { "Email" }));
}
}