public MemTag(MemTagModel memTagModel, string tagname, int? dec, string formula, bool needSaveToDb)
{
this.memTagModel = memTagModel;
this.TagType = MemTagType.Numeric;
this.TagName = tagname;
this.Formula = formula;
this.Dec = dec;
}
public object DoCal(MemTagModel tm)
{
OperFactory of = new OperFactory();
/// 算术符栈
ArrayList HList = new ArrayList();
/// 数值栈
ArrayList Vlist = new ArrayList();
foreach (var formaItem in this)
{
if (formaItem.Typ == FormulaItemType.Number)
{
//如果是数值，则写入数据栈
Vlist.Add(formaItem.Name);
}
else if (formaItem.Typ == FormulaItemType.Tag)
{
double?val = tm.GetTagValue(formaItem.Name);
Vlist.Add(val == null ? "0" : val.ToString());
}
else if (formaItem.Name != "=")
{
string opStr = formaItem.Name;
while (HList.Count > 0)
{
//比较优先级
if (of.MoreThen(HList[HList.Count - 1].ToString(), opStr))
{
if (HList[HList.Count - 1].ToString().Equals("("))
{
if (opStr.Equals(")")) //符号是否可以对消？
{
HList.RemoveAt(HList.Count - 1);
if (HList.Count > 0)
{
opStr = HList[HList.Count - 1].ToString();
HList.RemoveAt(HList.Count - 1);
}
}
else
{
break;
}
}
else
{
//如果新来操作符优先级低，则计算前面的运算符
IOper p = of.CreateOper(HList[HList.Count - 1].ToString());
if (p != null)
{
Vlist[Vlist.Count - 2] = p.Oper(Vlist[Vlist.Count - 2], Vlist[Vlist.Count - 1]);
HList.RemoveAt(HList.Count - 1);
Vlist.RemoveAt(Vlist.Count - 1);
}
else
{
break;
}
}
}
else
{
break;
}
}
if (!opStr.Equals(""))
{
HList.Add(opStr);
}
else
{
break;
}
}
}
if (HList.Count > 0)
{
IOper p = of.CreateOper(HList[HList.Count - 1].ToString());
if (p != null)
{
Vlist[Vlist.Count - 2] = p.Oper(Vlist[Vlist.Count - 2], Vlist[Vlist.Count - 1]);
HList.RemoveAt(HList.Count - 1);
Vlist.RemoveAt(Vlist.Count - 1);
}
}
return(Vlist[0]);
}
public MemTag(MemTagModel memTagModel, string tagname,string strval,bool needSaveToDb)
{
this.memTagModel = memTagModel;
this.TagType = MemTagType.String;
this.TagName = tagname;
}
