public static List <object> OPC_Read(List <string> ItemNames)
{
if (ItemNames == null || ItemNames.Count == 0)
{
return(null);
}
int count = ItemNames.Count;
List <object> readRtn = new List <object>();//设置返回值数组
using (var srv = new OPCXML_DataAccess())
{
ReadRequestItemList ItemLists = new ReadRequestItemList();
ItemLists.Items = new ReadRequestItem[count];
for (int i = 0; i < count; i++)
{
ItemLists.Items[i] = new ReadRequestItem();
ItemLists.Items[i].ItemPath = "";
ItemLists.Items[i].ItemName = ItemNames[i + 1];
}
RequestOptions opt = new RequestOptions();
ReplyItemList ItemValues = new ReplyItemList();;
OPCError[] Errors;
opt.ReturnItemTime = true;
srv.Read(opt, ItemLists, out ItemValues, out Errors);
foreach (var p in ItemValues.Items)
{
readRtn.Add(p.Value);
}
}
return(readRtn);
}
/*---------------------------------------------Reading Function Decleration ----------------------------------------------------------------*/
public List <object> OPCRead(List <string> TagNames)
{
/*---------------------------------------------Request Instance Decleration ----------------------------------------------------------------*/
List <string> TagName = new List <string>(TagNames);
List <object> TagValue = new List <object>();
int RTagNos = TagName.Count();
ReadRequestItemList ReadItemList = new ReadRequestItemList();
ReadItemList.Items = new ReadRequestItem[RTagNos];
RequestOptions.ClientRequestHandle = "";
RequestOptions.LocaleID = "EN-US";
RequestOptions.RequestDeadlineSpecified = false;
RequestOptions.ReturnDiagnosticInfo = false;
RequestOptions.ReturnErrorText = false;
RequestOptions.ReturnItemName = false;
RequestOptions.ReturnItemPath = false;
RequestOptions.ReturnItemTime = false;
ReadItemList.ItemPath = "";
for (int Looper = 0; Looper < RTagNos; Looper++)
{
ReadItemList.Items[Looper] = new ReadRequestItem();
ReadItemList.Items[Looper].ItemName = TagName[Looper];
}
/*---------------------------------------------Reading Function Invoked ----------------------------------------------------------------*/
myClient.Read(RequestOptions, ReadItemList, out ReplyList, out ErrorList);
/*---------------------------------------------Output to Console Invoked ----------------------------------------------------------------*/
for (int Looper = 0; Looper < ReplyList.Items.Count(); Looper++)
{
if ((ReplyList.Items[Looper] != null) && (ReplyList.Items[Looper].Value != null) && (ReplyList.Items[Looper].Value.GetType().Name != "XmlNode[]"))
{
TagValue.Add(ReplyList.Items[Looper].Value);
//Console.WriteLine(ReplyList.Items[Looper].Value.ToString());
//Value.ToString());
}
else
{
TagValue.Add("<Error>");
}
}
return(TagValue);
}