/// <summary>
///
/// </summary>
/// <param name="index"></param>
/// <param name="value"></param>
protected override void OnRemoveComplete(int index, object value)
{
base.OnRemoveComplete(index, value);
if (value is IWfInitialActivityDescriptor)
{
_InitialActivity = null;
}
else
if (value is IWfCompletedActivityDescriptor)
{
_CompletedActivity = null;
}
}
/// <summary>
/// 在向 DictionaryBase 实例中插入新元素之前执行其他自定义进程
/// </summary>
/// <param name="index">index</param>
/// <param name="value">value</param>
/// <remarks>
/// 处理过程：先在WfActivityDescriptorCollection中检验所加点的合法性ValidateActivity()（只能由一个开始点和一个结束点）
/// 将_Process值赋给item.Process，使每个点都包含全部流程点的属性，方便从任一点遍历整个流程
/// </remarks>
protected override void OnInsert(int index, object value)
{
WfActivityDescriptor item = (WfActivityDescriptor)value;
ValidateActivity(item);
item.Process = _Process;
base.OnInsert(index, value);
if (item is IWfInitialActivityDescriptor)
{
_InitialActivity = (IWfInitialActivityDescriptor)item;
}
else
if (item is IWfCompletedActivityDescriptor)
{
_CompletedActivity = (IWfCompletedActivityDescriptor)item;
}
}
