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下面是我写的一个函数，执行一些选择的操作。编译成功之后在中执行，没有问题。但打开另一个文档同样执行这个命令的时候却出现异常。百思不得其解。请各位老大帮忙看看。
private ObjectIdCollection GetSheet()
{
iA3Count = 0;
int iA4Count = 0;
TypedValue[] tv1 = new TypedValue[1];
TypedValue[] tv2 = new TypedValue[1];
tv1.SetValue(new TypedValue((int)DxfCode.BlockName, "a4"), 0); //设置选择集，A4
tv2.SetValue(new TypedValue((int)DxfCode.BlockName, "a3"), 0); //设置选择集，A3
// 赋值过滤条件给 SelectionFilter 对象 Assign the filter criteria to a SelectionFilter object
SelectionFilter fltA4 = new SelectionFilter(tv1);
SelectionFilter fltA3 = new SelectionFilter(tv2);
ObjectIdCollection objIdColl = new ObjectIdCollection();
// 要求在图形区域中选择对象，自动全选 Request for objects to be selected in the drawing area PromptSelectionResult acSSPrompt = ed.SelectAll(fltA4); //在第二个文档中执行出错的就是这行。 // 如果提示状态是 OK，对象就被选择了 If the prompt status is OK, objects were selected
if (acSSPrompt.Status == PromptStatus.OK)
{
SelectionSet set1 = acSSPrompt.Value;
objIdColl = new ObjectIdCollection(set1.GetObjectIds());
iA4Count = objIdColl.Count;
}
acSSPrompt = ed.SelectAll(fltA3);
if (acSSPrompt.Status == PromptStatus.OK)
{
SelectionSet set2 = acSSPrompt.Value;
if (objIdColl.Count == 0)
{
objIdColl = new ObjectIdCollection(set2.GetObjectIds());
}
else
{
foreach (ObjectId objId in set2.GetObjectIds())
{
objIdColl.Add(objId);
}
iA3Count = objIdColl.Count - iA4Count;
Application.ShowAlertDialog("文档 \"" + doc.Name + "\" " + "共有: " + iA3Count + " 张 A3 图纸和 " + iA4Count + " 张 A4 图纸.");
}
}
if (iA4Count == 0 && iA3Count == 0)
{
Application.ShowAlertDialog("文档没有图纸!");
return null;
}
return objIdColl;
}
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置顶卡
