//同步写数据
private void Btn_Write_Click(object sender, EventArgs e)
{
IntPtr pErrors = IntPtr.Zero;
object[] values = new object[2];
values[0] = Txt_W1.Text;
values[1] = Txt_W2.Text;
try
{
IOPCSyncIO20Obj.Write(2, ItemServerHandle, values, out pErrors);
int[] errors = new int[2];
Marshal.Copy(pErrors, errors, 0, 2);
String pstrError;
String pstrError1;
ServerObj.GetErrorString(errors[0], LOCALE_ID, out pstrError);
ServerObj.GetErrorString(errors[1], LOCALE_ID, out pstrError1);
}
catch (System.Exception error)
{
MessageBox.Show(error.Message, "Result-WriteItem", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
finally
{
if (pErrors != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(pErrors);
pErrors = IntPtr.Zero;;
}
}
}
public bool SyncWrite(object[] values, int[] itemHandle) //由编程人员保证，所写数据和添加Item的数据说明相对应
{
IntPtr pErrors = IntPtr.Zero;
bool isWrited = false;
try
{
if (values.Length != itemHandle.Length)
{
MessageBox.Show(string.Format("写入数据的个数与添加Item的数据说明长度不一致"), "写数据出错",
MessageBoxButtons.OK, MessageBoxIcon.Error);
return(false);
}
IOPCSyncObj.Write(values.Length, itemHandle, values, out pErrors);
int[] errors = new int[values.Length];
Marshal.Copy(pErrors, errors, 0, values.Length);
for (int i = 0; i < values.Length; i++)
{
if (errors[i] != 0) //写数据不成功
{
String pstrError; //需不需要释放？
ServerObj.GetErrorString(errors[i], LOCALE_ID, out pstrError);
MessageBox.Show(string.Format("写入第{0}个数据时出错:{1}", i, pstrError), "写数据出错",
MessageBoxButtons.OK, MessageBoxIcon.Error);
isWrited = false;
break;
}
else
{
isWrited = true;
}
}
}
catch (System.Exception error)
{
isWrited = false;
MessageBox.Show(error.Message, "写数据出错", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
finally
{
if (pErrors != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(pErrors);
pErrors = IntPtr.Zero;
}
}
return(isWrited);
}
/* 读取所有设备的数据，由上层应用调用，传递全局DeviceData[]引用 */
/* 这个函数必须在ConnectOPCServerOfBCNetS7函数执行成功后才能调用 */
/// <summary>
/// 读取标签值
/// </summary>
/// <param name="value"></param>
public static void ReadRunTimeData(ref Int32 value,
ref Int32 qua,
ref Int32 reserved,
ref string time,
ref string type,
ref string hclient,
ref string hashcode)
{
if (connectedOK == false)
{
return;
}
if (InitReqIOInterfaces() == false)
{
return;
}
IntPtr pItemValues = IntPtr.Zero; /* 标签值指针 */
IntPtr pErrors = IntPtr.Zero; /* 错误值指针 */
int[] errors = new int[1]; /* 保存所有错误 */
OPCITEMSTATE pItemState; /* 标签状态 */
for (int GroupIndex = 0; GroupIndex < 1; GroupIndex++) /* 读取每个组的所有标签值 */
{
if (pIOPCSyncIO[GroupIndex] != null) /* OPC同步接口有效 */
{
try
{
for (int i = 0; i < 1; i++) /* 获得该组的所有标签的服务器句柄 */
{
tItemSvrHandleArray[i] = ItemSvrHandleArray[GroupIndex, i];
}
pIOPCSyncIO[GroupIndex].Read(OPCDATASOURCE.OPC_DS_DEVICE, 1, tItemSvrHandleArray, out pItemValues, out pErrors); /* 读取标签值 */
IntPtr pos = pItemValues; /* 定位ItemValues的指针 */
Marshal.Copy(pErrors, errors, 0, 1); /* pErrors->errors */
if (pErrors != IntPtr.Zero) /* 释放pErrors的内存块 */
{
Marshal.FreeCoTaskMem(pErrors);
pErrors = IntPtr.Zero;
}
Boolean CheckAllBadQuality = true; /* 检查所有标签是否为BAD的标记 */
for (int i = 0; i < 1; i++) /* 从pItemState中获得每个标签的值 */
{
if (errors[i] == 0) /* 如果无错误 */
{
if (i != 0) /* 如果非第一个标签则指针移动一个OPCITEMSTATE */
{
pos = new IntPtr(pos.ToInt32() + Marshal.SizeOf(typeof(OPCITEMSTATE)));
}
pItemState = (OPCITEMSTATE)Marshal.PtrToStructure(pos, typeof(OPCITEMSTATE)); /* pos->OPCITEMSTATE */
CheckAllBadQuality = CheckAllBadQuality && (pItemState.wQuality != Qualities.OPC_QUALITY_GOOD); /* 如果所有标签质量都为非GOOD则为true */
/*测试标签的其他字段具体的值*/
if (pItemState.vDataValue == null)
{
value = 0;
}
else
{
value = Int32.Parse(String.Format("{0}", pItemState.vDataValue));
}
qua = Int32.Parse(String.Format("{0}", pItemState.wQuality));
reserved = Int32.Parse(String.Format("{0}", pItemState.wReserved));
time = String.Format("{0}", pItemState.ftTimeStamp);
type = pItemState.GetType().ToString();
hclient = String.Format("{0}", pItemState.hClient);
hashcode = pItemState.GetHashCode().ToString();
}
else
{
String strResult = "";
Serverobj.GetErrorString(errors[i], LOCALE_ID, out strResult);
// OutputExceptionToDatabase(.......) /* 将异常信息输出到数据库 */
}
}
/* 回收非托管资源 */
if (pItemValues != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(pItemValues);
pItemValues = IntPtr.Zero;
}
}
catch (System.Exception error) /* IOPCSyncIO::Read函数执行异常 */
{
MessageBox.Show(error.Message); /* 将异常信息输出到数据库 */
}
finally /* 回收非托管资源 */
{
if (pItemValues != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(pItemValues);
pItemValues = IntPtr.Zero;
}
}
}
}
if (pItemValues != IntPtr.Zero) /* 回收非托管资源 */
{
Marshal.FreeCoTaskMem(pItemValues);
pItemValues = IntPtr.Zero;
}
}
