[英]AutoMapper map Enum to SelectList - Selected value not working
I have created a map which convert an enum to a SelectList by using a custom implementation of ITypeConverter. 我创建了一个映射,该映射通过使用ITypeConverter的自定义实现将枚举转换为SelectList。
public class DeliveryModeToSelectListTypeConverter : ITypeConverter<ProductDeliveryMode, SelectList>
{
public SelectList Convert( ResolutionContext context ) {
ProductDeliveryMode pdm = (ProductDeliveryMode)context.SourceValue;
List<SelectListItem> items = new List<SelectListItem>();
SelectListItem sli1 = new SelectListItem() {
Text = StringEnum.GetStringValue( ProductDeliveryMode.DeliveryModeActivationByPin ),
Value = ( (int)ProductDeliveryMode.DeliveryModeActivationByPin ).ToString(),
Selected = (pdm == ProductDeliveryMode.DeliveryModeActivationByPin)
};
items.Add( sli1 );
[...other enum members here...]
SelectList sl = new SelectList( items, "Value", "Text", pdm );
return sl;
}
}
And then I have created a Map by using 然后我使用创建了一个Map
Mapper.CreateMap<ProductDeliveryMode, SelectList>()
.ConvertUsing( new DeliveryModeToSelectListTypeConverter() );
Mapper.CreateMap<Product, ProductViewModel>()
.ForMember( p => p.DeliveryModeOptions, opt => opt.MapFrom( x => x.DeliveryMode ) )
[...other members here...]
.Include<ExperienceProduct, ExperienceProductViewModel>();
Mapper.CreateMap<ExperienceProduct, ExperienceProductViewModel>()
.IncludeBase<Product, ProductViewModel>()
));
Everything seems to works very nice except from the fact that the Selected
value of the SelectListItem
does not maintains its value. 除了
SelectListItem
的Selected
值不保持其值的事实以外,其他所有内容似乎都工作得很好。 I have been able to step into the code and the SelectListItem
sli1
it's correctly created with the selected value equal to true
. 我已经能够进入代码,并且
SelectListItem
sli1
已正确创建,且所选值等于true
。
However when i check that value after a mapping the value is always false
as you can see from the following screenshots. 但是,当我在映射后检查该值时,该值始终为
false
如以下屏幕截图所示。
Where do I am wrong with this code? 该代码在哪里出错?
The problem is when you create the select list: 问题是当您创建选择列表时:
SelectList sl = new SelectList( items, "Value", "Text", pdm);
You're passing the selected item as pdm
of type ProductDeliveryMode
, which is being compared against the Value
property of type string
. 您正在将所选项目作为
ProductDeliveryMode
类型的pdm
传递,并将其与string
类型的Value
属性进行比较。
From your comment below, the solution was to pass pdm
as a string. 从下面的评论中,解决方案是将
pdm
作为字符串传递。
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