SelectExcept删除连接表

Question

我已经使用动态LINQ基于https://stackoverflow.com/a/27205784/7468628 SelectExcept。

代码：

public static IQueryable SelectExcept<TSource, TResult>(this IQueryable<TSource> source, List<string> excludeProperties) 
    { 

     var sourceType = typeof(TSource); 
     var allowedSelectTypes = new Type[] { typeof(string), typeof(ValueType) }; 
     var sourceProperties = sourceType.GetProperties(BindingFlags.Public | BindingFlags.Instance).Where(p => allowedSelectTypes.Any(t => t.IsAssignableFrom(((PropertyInfo)p).PropertyType))).Select(p => ((MemberInfo)p).Name); 
     var sourceFields = sourceType.GetFields(BindingFlags.Public | BindingFlags.Instance).Where(f => allowedSelectTypes.Any(t => t.IsAssignableFrom(((FieldInfo)f).FieldType))).Select(f => ((MemberInfo)f).Name); 

     var selectFields = sourceProperties.Concat(sourceFields).Where(p => !excludeProperties.Contains(p)).ToArray(); 

     var dynamicSelect = 
       string.Format("new({0})", 
         string.Join(", ", selectFields)); 

     return selectFields.Count() > 0 
      ? source.Select(dynamicSelect) 
      : Enumerable.Empty<TSource>().AsQueryable<TSource>(); 
    } 

这个伟大的工程与领域但此刻我的对象是一个对象，从表中，并加入了与其他表我使用SelectExcept时失去了参加价值。我怎样才能保持这个价值呢？

Answer 1

嗯，我找到了答案，所以如果有人想知道如何在这里解决它，它是：

public static IQueryable SelectExcept<TSource, TResult>(this IQueryable<TSource> source, List<string> excludeProperties) 
    { 

     var sourceType = typeof(TSource); 
     var allowedSelectTypes = new Type[] { typeof(string), typeof(ValueType), typeof(object) }; 
     var sourceProperties = sourceType.GetProperties(BindingFlags.Public | BindingFlags.Instance).Where(p => allowedSelectTypes.Any(t => t.IsAssignableFrom(((PropertyInfo)p).PropertyType))).Select(p => ((MemberInfo)p).Name); 
     var sourceFields = sourceType.GetFields(BindingFlags.Public | BindingFlags.Instance).Where(f => allowedSelectTypes.Any(t => t.IsAssignableFrom(((FieldInfo)f).FieldType))).Select(f => ((MemberInfo)f).Name); 
     var selectFields = sourceProperties.Concat(sourceFields).Where(p => !excludeProperties.Contains(p)).ToArray(); 

     var dynamicSelect = 
       string.Format("new({0})", 
         string.Join(", ", selectFields)); 

     return selectFields.Count() > 0 
      ? source.Select(dynamicSelect) 
      : Enumerable.Empty<TSource>().AsQueryable<TSource>(); 
    } 

您需要的typeof（对象）其他选择的类型时，不会收集你自己定义的类的字段。