public static RuntimePropertyInfo GetPropertyInfo(MemberExpression selector)
{
MemberExpression me = selector;
if (me == null)
{
throw new NotSupportedException("传入表达式类型不正确");
}
Stack <RuntimePropertyInfo> stack = new Stack <RuntimePropertyInfo>();
stack.Push(new RuntimePropertyInfo(me.Member as PropertyInfo));
MemberExpression pe = me.Expression as MemberExpression;
while (pe != null && pe.NodeType == ExpressionType.MemberAccess)
{
stack.Push(new RuntimePropertyInfo(pe.Member as PropertyInfo));
pe = pe.Expression as MemberExpression;
}
RuntimePropertyInfo cur = stack.Pop();
RuntimePropertyInfo p = null;
while (stack.Any())
{
p = stack.Pop();
p.ParentProperty = cur;
cur = p;
}
return(cur);
}
public void Remove(RuntimePropertyInfo propertyInfo)
{
if (propertyInfo != null)
{
propertyList.Remove(propertyInfo);
}
}
public void Add(RuntimePropertyInfo propertyInfo)
{
if (propertyInfo != null)
{
propertyList.Add(propertyInfo);
}
}
public void Remove <TMember>(Expression <Func <TEntity, TMember> > field)
{
if (field != null)
{
RuntimePropertyInfo pi = getPropertyInfo(field);
propertyList.Remove(pi);
}
}
private RuntimePropertyInfo getPropertyInfo <TMember>(Expression <Func <TEntity, TMember> > selector)
{
return(RuntimePropertyInfo.GetPropertyInfo(selector));
}
/// <summary>
/// 递归检查符合条件的属性
/// </summary>
/// <param name="entityType">实例类型</param>
/// <param name="obj">实例</param>
/// <param name="checkProc">检查委托</param>
/// <param name="collection">属性集合</param>
/// <param name="parentProperty">上级属性</param>
/// <param name="refObjects">已检查的实例列表，防止无限递归</param>
private static void getProperties <T>(Type entityType, object obj, Func <RuntimePropertyInfo, object, bool> checkProc, PropertyCollection <T> collection, RuntimePropertyInfo parentProperty, List <object> refObjects)
where T : class, new()
{
refObjects.Add(obj);
PropertyInfo[] pis = entityType.GetProperties();
Func <RuntimePropertyInfo, object, bool> actualCheckProc = checkProc;
if (actualCheckProc == null)
{
actualCheckProc = (p, o) => { return(true); };
}
bool isPass = false;
foreach (PropertyInfo pi in pis)
{
if (!pi.CanRead)
{
continue;
}
object val = null;
if (obj != null)
{
val = pi.GetValue(obj, null);
}
RuntimePropertyInfo curProperty = new RuntimePropertyInfo(pi);
curProperty.ParentProperty = parentProperty;
isPass = actualCheckProc(curProperty, val);
if (isPass)
{
collection.Add(curProperty);
}
//递归子级对象
if (pi.PropertyType.IsClass && val != null && !refObjects.Any(x => x == val)
)
{
bool goOn = true;
foreach (Type t in ignoreTypes)
{
if (pi.PropertyType == t ||
pi.PropertyType.IsSubclassOf(t))
{
goOn = false;
break;
}
if (t.IsInterface && t.IsAssignableFrom(pi.PropertyType))
{
goOn = false;
break;
}
}
if (goOn)
{
getProperties(pi.PropertyType, val, actualCheckProc, collection, curProperty, refObjects);
}
}
}
}
