解决方法
DanHerbert得到了它. Darn,我也花了几个小时！在尝试回答这个问题的过程中,我提出了一个简化的通用StateManagedCollection,它继承自框架的内置StateManagedCollection,基于版本
here.也许你会发现它很有用.我的示例项目的完整源代码可用于
here.
using System;
using System.Collections;
using System.Collections.Specialized;
using System.Security.Permissions;
using System.Web;
using System.Collections.Generic;
using System.Web.UI;
namespace Web
{
public abstract class StateManagedCollection<T> : StateManagedCollection,IList<T>,ICollection<T>,IEnumerable<T>
where T : class,IStateManagedItem,new()
{
protected override object CreateKnownType(int index)
{
return Activator.CreateInstance<T>();
}
protected override Type[] GetKnownTypes()
{
return new Type[] { typeof(T) };
}
protected override void SetDirtyObject(object o)
{
((IStateManagedItem)o).SetDirty();
}
#region IList<T> Members
public int IndexOf(T item)
{
return ((IList)this).IndexOf(item);
}
public void Insert(int index,T item)
{
((IList)this).Insert(index,item);
if (((IStateManager)this).IsTrackingViewState)
{
this.SetDirty();
}
}
public void RemoveAt(int index)
{
((IList)this).RemoveAt(index);
if (((IStateManager)this).IsTrackingViewState)
{
this.SetDirty();
}
}
public T this[int index]
{
get { return (T)this[index]; }
set { this[index] = value; }
}
#endregion
#region ICollection<T> Members
public void Add(T item)
{
((IList)this).Add(item);
this.SetDirty();
}
public bool Contains(T item)
{
return ((IList)this).Contains(item);
}
public void CopyTo(T[] array,int arrayIndex)
{
((IList)this).CopyTo(array,arrayIndex);
}
public bool IsReadOnly
{
get { return false; }
}
public bool Remove(T item)
{
if (((IList)this).Contains(item))
{
((IList)this).Remove(item);
return true;
}
return false;
}
#endregion
#region IEnumerable<T> Members
IEnumerator<T> IEnumerable<T>.GetEnumerator()
{
throw new NotImplementedException();
}
#endregion
#region IEnumerable Members
IEnumerator IEnumerable.GetEnumerator()
{
return ((IList)this).GetEnumerator();
}
#endregion
}
}
