private void Btn_DisConn_Click(object sender, EventArgs e)
{
try
{
if (IOPCSyncIO20Obj != null)
{
Marshal.ReleaseComObject(IOPCSyncIO20Obj);
IOPCSyncIO20Obj = null;
}
ServerObj.RemoveGroup(pSvrGroupHandle, 0);
if (IOPCGroupStateMgtObj != null)
{
Marshal.ReleaseComObject(IOPCGroupStateMgtObj);
IOPCGroupStateMgtObj = null;
}
if (MyobjGroup1 != null)
{
Marshal.ReleaseComObject(MyobjGroup1);
MyobjGroup1 = null;
}
if (ServerObj != null)
{
Marshal.ReleaseComObject(ServerObj);
ServerObj = null;
}
}
catch (System.Exception error)
{
MessageBox.Show(error.Message, "Result-Stop Server", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
int pSvrGroupHandle = 0; //OPCGroup句柄
//连接OPCServer，建立相应OPCGroup组，并添加需要读写的Item
private void Btn_Conn_Click(object sender, EventArgs e)
{
//定义变量
Type svrComponenttype;
Int32 dwRequestedUpdateRate = 1000; //订阅读取速度
Int32 hClientGroup = 1;
Int32 pRevUpdateRate;
OpcRcw.Da.OPCITEMDEF[] ItemArray;
float deadband = 0;
int TimeBias = 0;
//使用C#托管代码时,内存地址和GC回收不需要关心,CLR已经给我们暗箱操作
//如果在C#中调用了非托管代码,比如VC的DLL,而且它有一个回调函数,需要引用C#中的某个对象并操作,这时候需要小心
//要是非托管代码中用到的托管代码那个对象被GC给回收了,这时候就会报内存错误
//所以就要把那个对象钉住"Pin",让它的内存地址固定,而不被垃圾回收掉,然后我们自己管理,自己释放内存,这时候就需要GCHandle
GCHandle hTimeBias, hDeadband;
hTimeBias = GCHandle.Alloc(TimeBias, GCHandleType.Pinned);
hDeadband = GCHandle.Alloc(deadband, GCHandleType.Pinned);
Guid iidRequiredInterface = typeof(IOPCItemMgt).GUID;
try
{
svrComponenttype = Type.GetTypeFromProgID("OPC.SimaticNet", "192.168.0.102"); //OPCServer
ServerObj = (OpcRcw.Da.IOPCServer)Activator.CreateInstance(svrComponenttype); //注册
try
{
ServerObj.AddGroup("MyOPCGroup1", //增加组
0,
dwRequestedUpdateRate,
hClientGroup,
hTimeBias.AddrOfPinnedObject(),
hDeadband.AddrOfPinnedObject(),
LOCALE_ID,
out pSvrGroupHandle,
out pRevUpdateRate,
ref iidRequiredInterface,
out MyobjGroup1);
IOPCSyncIO20Obj = (IOPCSyncIO)MyobjGroup1; //Query interface for sync calls on group object
IOPCGroupStateMgtObj = (IOPCGroupStateMgt)MyobjGroup1;
ItemArray = new OPCITEMDEF[2]; //定义读写的item,共2个变量
ItemArray[0].szAccessPath = "";
ItemArray[0].szItemID = "S7:[S7 conncetion_1]DB10,INT0"; //地址,不同数据类型表示方法不同
ItemArray[0].bActive = 1; //是否激活
ItemArray[0].hClient = 1; //表示ID
ItemArray[0].dwBlobSize = 0;
ItemArray[0].vtRequestedDataType = 2;
ItemArray[1].szAccessPath = "";
ItemArray[1].szItemID = "S7:[S7 connection_1]DB10,STRING14.10";
ItemArray[1].bActive = 1;
ItemArray[1].hClient = 2;
ItemArray[1].dwBlobSize = 0;
ItemArray[1].pBlob = IntPtr.Zero;
ItemArray[1].vtRequestedDataType = 8;
IntPtr pResults = IntPtr.Zero;
IntPtr pErrors = IntPtr.Zero;
try
{
((OpcRcw.Da.IOPCItemMgt)MyobjGroup1).AddItems(2, ItemArray, out pResults, out pErrors);
int[] errors = new int[2];
IntPtr pos = pResults;
ItemServerHandle = new int[2];
Marshal.Copy(pErrors, errors, 0, 2);
if (errors[0] == 0)
{
OPCITEMRESULT result = (OPCITEMRESULT)Marshal.PtrToStructure(pos, typeof(OPCITEMRESULT));
ItemServerHandle[0] = result.hServer;
}
if (errors[1] == 0)
{
pos = new IntPtr(pos.ToInt32() + Marshal.SizeOf(typeof(OPCITEMRESULT)));
OPCITEMRESULT result = (OPCITEMRESULT)Marshal.PtrToStructure(pos, typeof(OPCITEMRESULT));
ItemServerHandle[1] = result.hServer;
}
}
catch (System.Exception error)
{
MessageBox.Show(error.Message, "Result-Adding Items", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
finally
{
//free the memory
if (pResults != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(pResults);
pResults = IntPtr.Zero;
}
if (pErrors != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(pErrors);
pErrors = IntPtr.Zero;
}
}
}
catch (System.Exception error)
{
MessageBox.Show(String.Format("Error while creating group object:-{0}", error.Message), "Result-Add group", MessageBoxButtons.AbortRetryIgnore, MessageBoxIcon.Error);
}
finally
{
if (hDeadband.IsAllocated)
{
hDeadband.Free();
}
if (hTimeBias.IsAllocated)
{
hTimeBias.Free();
}
}
}
catch (System.Exception error)
{
MessageBox.Show(String.Format("Error while creating server object:-{0}", error.Message), "Result-Create Server", MessageBoxButtons.AbortRetryIgnore, MessageBoxIcon.Error);
}
}
/// <summary>
/// 添加组和标签异步读取
/// </summary>
/// <param name="name"></param>
public static void OPCServerADDgroup(string name, string itemname)
{
Int32 dwRequestedUpdateRate = 1000;
Int32 hClientGroup = 1;
Int32 pRevUpdateRate;
float deadband = 0;
int TimeBias = 0;
GCHandle hTimeBias, hDeadband;
hTimeBias = GCHandle.Alloc(TimeBias, GCHandleType.Pinned);
hDeadband = GCHandle.Alloc(deadband, GCHandleType.Pinned);
Guid iidRequiredInterface = typeof(IOPCItemMgt).GUID;
if (connectedOK == false)
{
MessageBox.Show("OPC服务器没有连接，读取数据失败");
return;
}
IntPtr pResults = IntPtr.Zero; /* 保存AddItems函数的执行结果 */
IntPtr pErrors = IntPtr.Zero; /* 保存AddItems函数的执行错误 */
/* 执行结果信息 */
try
{
Serverobj.AddGroup(name,
0, dwRequestedUpdateRate,
hClientGroup,
hTimeBias.AddrOfPinnedObject(),
hDeadband.AddrOfPinnedObject(),
LOCALE_ID,
out pSvrGroupHandle,
out pRevUpdateRate,
ref iidRequiredInterface,
out MyobjGroup1); //增加相应的组
IOPCAsyncIO2Obj = (IOPCAsyncIO2)MyobjGroup1; //为组同步读写定义句柄
IOPCGroupStateMgtObj = (IOPCGroupStateMgt)MyobjGroup1; //组管理对象
pIConnectionPointContainer = (IConnectionPointContainer)MyobjGroup1; //增加特定组的异步调用连接
Guid iid = typeof(IOPCDataCallback).GUID; //为所有的异步调用创建回调
pIConnectionPointContainer.FindConnectionPoint(ref iid, out pIConnectionPoint);
//为OPC server 的连接点与客户端接收点之间建立连接
// pIConnectionPoint.Advise(this, out dwCookie);
tItemSvrHandleArray = new int[1];
OPCITEMDEF[] itemarray = new OPCITEMDEF[4];
itemarray[0].szAccessPath = ""; /* 访问路径"" */
itemarray[0].szItemID = itemname; /* OPC标签名称 */
itemarray[0].hClient = 1;
tItemSvrHandleArray[0] = 1; /* 客户机的标签索引 */
itemarray[0].dwBlobSize = 0;
itemarray[0].pBlob = IntPtr.Zero;
itemarray[0].vtRequestedDataType = 2;
ItemSvrHandleArray = new int[1, 1];
((IOPCItemMgt)MyobjGroup1).AddItems(1, itemarray, out pResults, out pErrors); //将标签加入到组中
int[] errors = new int[1]; /* 每个标签的错误信息 */
IntPtr pos = pResults;
Marshal.Copy(pErrors, errors, 0, 1); /* pErrors->errors */
for (int i = 0; i < 1; i++) /* 检查每个标签的error */
{
if (errors[i] == 0) /* 如果无错误=0 */
{
if (i != 0) /* 如果不是第一个标签则指针移动一个OPCITEMRESULT */
{
pos = new IntPtr(pos.ToInt32() + Marshal.SizeOf(typeof(OPCITEMRESULT)));
}
OPCITEMRESULT result = (OPCITEMRESULT)Marshal.PtrToStructure(pos, typeof(OPCITEMRESULT)); /* IntPtr->OPCITEMRESULT */
ItemSvrHandleArray[0, 0] = result.hServer; /* 保存该标签在服务器中的句柄，以后读写标签数值时要用到 */
}
else
{ /* 如果有错误（向服务器添加标签失败） */
connectedOK = false; /* 连接失败 */
// String strError;
// Serverobj.GetErrorString(errors[i], LOCALE_ID, out strError); /* 获取错误信息 */
// OutputExceptionToDatabase(.......) /* 将异常信息输出到数据库 */
throw new Exception("添加标签：" + itemarray[i].szItemID + " 错误！" //+ strError
); /* 抛出异常 */
}
}
}
catch (System.Exception error)
{
MessageBox.Show("group组添加失败失败\n" + error.Message);
}
finally
{
if (pResults != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(pResults);
pErrors = IntPtr.Zero;
}
if (pErrors != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(pErrors);
pErrors = IntPtr.Zero;
}
}
}