我必须遍历几个类中的所有属性,并检查任何可以为空的属性,以查看它们是否有值。如何将从propertyInfo.GetValue()返回的值转换为泛型可空类型,以便检查HasValue属性?PropertyInfo propInfo in this.GetType().GetProperties()) if (<Snip: Check to see that this is a nullable((Nullable)propInfo.GetValue(this, null)).HasValue)
Console.WriteLine(type); MessageBox.Show("This looks like an auto-generated type; you shouldn't= null) if (Nullable.GetUnderlyingType(method.Item4[comboBox2.SelectedIndex - 1].ParameterTypetypeof(Enum)) MessageBox.Show
public static Nullable<T> CoalesceMax<T>(Nullable<T> a, Nullable<T> b) where T : IComparable ifreturn result;它在编译过程中会出现以下错误:
类型“T”必须是不可为null值的类型,才能将其用作泛型类型或方法“System.Nullable”<e