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);
}
public bool OPC_WritePoint(string ItemName, object value)
{
try
{
using (OPCXML_DataAccess srv = new OPCXML_DataAccess())
{
WriteRequestItemList ItemLists = new WriteRequestItemList();
ItemLists.Items = new ItemValue[1];
ItemLists.Items[0] = new ItemValue();
ItemLists.Items[0].ItemPath = "";
ItemLists.Items[0].ItemName = ItemName;
ItemLists.Items[0].Value = value;
ItemLists.Items[0].TimestampSpecified = false;
RequestOptions opt = new RequestOptions();
ReplyItemList ItemValues = new ReplyItemList();
OPCError[] Errors;
opt.ReturnItemTime = true;
ReplyBase replay = srv.Write(opt, ItemLists, true, out ItemValues, out Errors);
if (replay.ServerState == serverState.failed || replay.ServerState == serverState.commFault)
{
return(false);
}
else
{
return(true);
}
}
}
catch (Exception)
{
return(false);
}
}
public bool OPC_WriteSerial(List <string> ItemNames, List <object> values)
{
try
{
using (OPCXML_DataAccess srv = new OPCXML_DataAccess())
{
int count = ItemNames.Count;
WriteRequestItemList ItemLists = new WriteRequestItemList();
ItemLists.Items = new ItemValue[count];
for (int i = 0; i < count; i++)
{
ItemLists.Items[i] = new ItemValue();
ItemLists.Items[i].ItemPath = "";
ItemLists.Items[i].ItemName = ItemNames[i];
ItemLists.Items[i].Value = values[i];
ItemLists.Items[i].TimestampSpecified = false;
}
RequestOptions opt = new RequestOptions();
ReplyItemList ItemValues = new ReplyItemList();
OPCError[] Errors;
opt.ReturnItemTime = true;
ReplyBase replay = srv.Write(opt, ItemLists, true, out ItemValues, out Errors);
if (replay.ServerState == serverState.failed || replay.ServerState == serverState.commFault)
{
return(false);
}
else
{
return(true);
}
}
}
catch (Exception)
{
return(false);
}
}