绑定表达式中的TinyMapper null检查
提问于 2021-11-16 21:20:32
下面是我的课程
public class CommonClassSource
{
public int Id {get;set;}
}
public class CommonClassDestination
{
public int Id {get;set;}
}
public class SourceClass
{
public CommonClassSource CommonSource {get;set;}
}
public class DestinationClass
{
public CommonClassDestination CommonDestination {get;set;}
}有没有办法在config.Bind中添加空检查？例如:在这里，检查source.CommonSource是否为空
TinyMapper.Bind<SourceClass, DestinationClass>(config => {
config.Bind(source => source.CommonSource.Id,
target => target.CommonDestination.Id));
});
回答 1
Stack Overflow用户
发布于 2021-11-16 21:40:42
如果您希望在source.CommonSource为null时不存在任何问题，那么以下脚本应该适用于您。
static bool isSourceNull;
public static void Main()
{
Func<SourceClass,object> getSCI = GetSourceClassId;
Func<DestinationClass, object> getDCI = GetDestClassId;
TinyMapper.Bind<SourceClass, DestinationClass>(config => {
config.Bind(source=>getSCI,
target =>getDCI);
});
}
static object GetSourceClassId(SourceClass source)
{
isSourceNull = source.CommonSource == null;
if (isSourceNull) return -1;
else return source.CommonSource.Id;
}
static object GetDestClassId(DestinationClass destinationClass)
{
if (isSourceNull)
{
destinationClass.CommonDestination = null;
return -1;
}
else if (destinationClass.CommonDestination != null)
return destinationClass.CommonDestination.Id;
else return -1;
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/69999283
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