您能帮我解决以下错误，我检查了所有内容，但没有ID错误
用户代码未处理ModelValidationException
EntityFramework.dll中发生类型为'System.Data.Entity.ModelConfiguration.ModelValidationException'的异常，但未在用户代码中处理
附加信息：在模型生成过程中检测到一个或多个验证错误：
public int GetCount()
{
ShoppingCartId = GetCartId();
// Get the count of each item in the cart and sum them up
int? count = (from cartItems in _db.ShoppingCartItems
where cartItems.CartId == ShoppingCartId
select (int?)cartItems.Quantity).Sum();
// Return 0 if all entries are null
return count ?? 0;
}
令人沮丧的是，.net并不总是向您显示内部异常。用这个捕获将代码包装在try块中
catch (DbEntityValidationException ex) {
// Retrieve the error messages as a list of strings.
var errorMessages = ex.EntityValidationErrors
.SelectMany(x => x.ValidationErrors)
.Select(x => x.ErrorMessage);
// Join the list to a single string.
var fullErrorMessage = string.Join("; ", errorMessages);
// Combine the original exception message with the new one.
var exceptionMessage = string.Concat(ex.Message, " The validation errors are: ", fullErrorMessage);
// Throw a new DbEntityValidationException with the improved exception message.
throw new DbEntityValidationException(exceptionMessage, ex.EntityValidationErrors); }
本文收集自互联网，转载请注明来源。
如有侵权，请联系[email protected] 删除。
我来说两句