/// <summary>
/// Calls a method on an object dynamically.
///
/// parameterTypes must match the parameters and in the same order.
/// </summary>
/// <param name="memberCode">1-GetProperty, 2-SetProperty, 3-Method</param>
/// <param name="memberName">The member name to call as a string</param>
/// <param name="parameterTypes">Array of paramerter types in order</param>
/// <param name="parms">Array of parameters in order</param>
/// <exception cref="PropertyNotImplementedException"></exception>
/// <exception cref="MethodNotImplementedException"></exception>
/// <returns>object</returns>
internal object CallMember(int memberCode, string memberName, Type[] parameterTypes, params object[] parms)
{
TL.BlankLine();
switch (memberCode)
{
case 1: // Property Read
PropertyInfo propertyGetInfo = GetObjType.GetProperty(memberName);
if (propertyGetInfo != null) // We have a .NET object
{
TL.LogMessage(memberName + " Get", "GET " + memberName + " - .NET");
try
{
//run the .net object
object result = propertyGetInfo.GetValue(GetLateBoundObject, null);
TL.LogMessage(memberName + " Get", " " + result.ToString());
return(result);
}
catch (TargetInvocationException e)
{
GetTargetInvocationExceptionHandler(memberName, e);
}
catch (Exception e)
{
TL.LogMessageCrLf("Exception", e.ToString());
throw;
}
}
//check the type to see if it's a COM object
if (IsComObject) // We have a COM object
{
TL.LogMessage(memberName + " Get", "GET " + memberName + " - COM");
try
{
//run the COM object property
object result = GetObjType.InvokeMember(memberName,
BindingFlags.Default | BindingFlags.GetProperty,
null,
GetLateBoundObject,
new object[] { },
CultureInfo.InvariantCulture);
TL.LogMessage(memberName + " Get", " " + result.ToString());
return(result);
}
catch (COMException e)
{
TL.LogMessageCrLf("COMException", e.ToString());
if (e.ErrorCode == int.Parse("80020006", NumberStyles.HexNumber, CultureInfo.InvariantCulture))
{
TL.LogMessageCrLf(memberName + " Get", " Throwing PropertyNotImplementedException: " + _strProgId + " " + memberName);
throw new PropertyNotImplementedException(_strProgId + " " + memberName, false, e);
}
TL.LogMessageCrLf(memberName + " Get", "Re-throwing exception");
throw;
}
catch (TargetInvocationException e)
{
TL.LogMessageCrLf("TargetInvocationException", e.ToString());
if (e.InnerException is COMException)
{
string message = e.InnerException.Message;
int errorcode = ((COMException)e.InnerException).ErrorCode;
// Telescope simulator in V1 mode throws not implemented exceptions rather than some kind of missing member exception, so test for this!
if (errorcode == int.Parse("80040400", NumberStyles.HexNumber, CultureInfo.InvariantCulture))
{
TL.LogMessageCrLf(memberName + " Get", " Translating COM not implemented exception to PropertyNotImplementedException: " + _strProgId + " " + memberName);
throw new PropertyNotImplementedException(_strProgId + " " + memberName, false, e);
}
else // Throw a new COM exception that looks like the original exception, containing the original inner COM exception for reference
{
TL.LogMessageCrLf(memberName + " Get", "COM Exception so throwing inner exception: '" + message + "' '0x" + String.Format("{0:x8}", errorcode) + "'");
throw new DriverAccessCOMException(message, errorcode, e);
}
}
GetTargetInvocationExceptionHandler(memberName, e);
}
catch (Exception e)
{
TL.LogMessageCrLf("Exception", e.ToString());
throw;
}
}
//evertyhing failed so throw an exception
TL.LogMessage(memberName + " Get", " The object is neither a .NET object nor a COM object!");
throw new PropertyNotImplementedException(_strProgId + " " + memberName, false);
case 2: // Property Write
PropertyInfo propertySetInfo = GetObjType.GetProperty(memberName);
if (propertySetInfo != null) // We have a .NET object
{
TL.LogMessage(memberName + " Set", "SET " + memberName + " - .NET");
try
{
TL.LogMessage(memberName + " Set", " " + parms[0].ToString());
propertySetInfo.SetValue(GetLateBoundObject, parms[0], null);
return(null);
}
catch (TargetInvocationException e)
{
SetTargetInvocationExceptionHandler(memberName, e);
}
catch (Exception e)
{
TL.LogMessageCrLf("Exception", e.ToString());
throw;
}
}
//check the type to see if it's a COM object
if (IsComObject)
{
TL.LogMessage(memberName + " Set", "SET " + memberName + " - COM");
try
{
TL.LogMessage(memberName + " Set", " " + parms[0].ToString());
//run the COM object property
GetObjType.InvokeMember(memberName,
BindingFlags.Default | BindingFlags.SetProperty,
null,
GetLateBoundObject,
parms,
CultureInfo.InvariantCulture);
return(null);
}
catch (COMException e)
{
TL.LogMessageCrLf("COMException", e.ToString());
if (e.ErrorCode == int.Parse("80020006", NumberStyles.HexNumber, CultureInfo.InvariantCulture))
{
TL.LogMessageCrLf(memberName + " Set", " Throwing PropertyNotImplementedException: " + _strProgId + " " + memberName);
throw new PropertyNotImplementedException(_strProgId + " " + memberName, true, e);
}
TL.LogMessageCrLf(memberName + " Set", " Re-throwing exception");
throw;
}
catch (TargetInvocationException e)
{
TL.LogMessageCrLf("TargetInvocationException", e.ToString());
if (e.InnerException is COMException)
{
string message = e.InnerException.Message;
int errorcode = ((COMException)e.InnerException).ErrorCode;
// Telescope simulator in V1 mode throws not implemented exceptions rather than some kind of missing member exception, so test for this!
if (errorcode == int.Parse("80040400", NumberStyles.HexNumber, CultureInfo.InvariantCulture))
{
TL.LogMessageCrLf(memberName + " Set", " Translating COM not implemented exception to PropertyNotImplementedException: " + _strProgId + " " + memberName);
throw new PropertyNotImplementedException(_strProgId + " " + memberName, true, e);
}
else // Throw a new COM exception that looks like the original exception, containing the original inner COM exception for reference
{
TL.LogMessageCrLf(memberName + " Set", "COM Exception so throwing inner exception: '" + message + "' '0x" + String.Format("{0:x8}", errorcode) + "'");
throw new DriverAccessCOMException(message, errorcode, e);
}
}
SetTargetInvocationExceptionHandler(memberName, e);
}
catch (Exception e)
{
TL.LogMessageCrLf("Exception", e.ToString());
throw;
}
}
//evertyhing failed so throw an exception
TL.LogMessage("PropertySet", " The object is neither a .NET object nor a COM object!");
throw new PropertyNotImplementedException(_strProgId + " " + memberName, true);
case 3: // Method
TL.LogMessage(memberName, "Start");
/*foreach (Type t in parameterTypes)
* {
* TL.LogMessage(memberName, " Parameter: " + t.FullName);
* }*/
var methodInfo = GetObjType.GetMethod(memberName);
//, parameterTypes); //Peter: Had to take parameterTypes out to get CanMoveAxis to work with .NET drivers
if (methodInfo != null)
{
//TL.LogMessage(memberName, " Got MethodInfo");
//ParameterInfo[] pars = methodInfo.GetParameters();
/*foreach (ParameterInfo p in pars)
* {
* TL.LogMessage(memberName, " Parameter: " + p.ParameterType);
* } */
try
{
foreach (object parm in parms)
{
TL.LogMessage(memberName, " Parameter: " + parm.ToString());
}
TL.LogMessage(memberName, " Calling " + memberName);
object result = methodInfo.Invoke(GetLateBoundObject, parms);
if (result == null)
{
TL.LogMessage(memberName, " Successfully called method, no return value");
}
else
{
TL.LogMessage(memberName, " " + result.ToString());
}
return(result);
}
catch (TargetInvocationException e)
{
MethodTargetInvocationExceptionHandler(memberName, e);
}
// Unexpected exception so throw it all to the client
catch (Exception e)
{
TL.LogMessageCrLf("Exception", e.ToString());
throw;
}
}
//check the type to see if it's a COM object
if (IsComObject)
{
try
{
//run the COM object method
foreach (object parm in parms)
{
TL.LogMessage(memberName, " Parameter: " + parm.ToString());
}
TL.LogMessage(memberName, " Calling " + memberName + " - it is a COM object");
object result = GetObjType.InvokeMember(memberName,
BindingFlags.Default | BindingFlags.InvokeMethod,
null,
GetLateBoundObject,
parms,
CultureInfo.InvariantCulture);
if (result == null)
{
TL.LogMessage(memberName, " Successfully called method, no return value");
}
else
{
TL.LogMessage(memberName, " " + result.ToString());
}
return(result);
}
catch (COMException e)
{
TL.LogMessageCrLf("COMException", e.ToString());
if (e.ErrorCode == int.Parse("80020006", NumberStyles.HexNumber, CultureInfo.InvariantCulture))
{
TL.LogMessageCrLf(memberName, " Throwing MethodNotImplementedException: " + _strProgId + " " + memberName);
throw new MethodNotImplementedException(_strProgId + " " + memberName);
}
TL.LogMessageCrLf(memberName, "Re-throwing exception");
throw;
}
catch (TargetInvocationException e)
{
TL.LogMessageCrLf("TargetInvocationException", e.ToString());
if (e.InnerException is COMException)
{
string message = e.InnerException.Message;
int errorcode = ((COMException)e.InnerException).ErrorCode;
// Telescope simulator in V1 mode throws not implemented exceptions rather than some kind of missing member exception, so test for this!
if (errorcode == int.Parse("80040400", NumberStyles.HexNumber, CultureInfo.InvariantCulture))
{
TL.LogMessageCrLf(memberName, " Translating COM not implemented exception to MethodNotImplementedException: " + _strProgId + " " + memberName);
throw new MethodNotImplementedException(_strProgId + " " + memberName, e);
}
else // Throw a new COM exception that looks like the original exception, containing the original inner COM exception for reference
{
TL.LogMessageCrLf(memberName, " COM Exception so throwing inner exception: '" + message + "' '0x" + String.Format("{0:x8}", errorcode) + "'");
throw new DriverAccessCOMException(message, errorcode, e);
}
}
MethodTargetInvocationExceptionHandler(memberName, e);
}
catch (Exception e)
{
TL.LogMessageCrLf("Exception", e.ToString());
throw;
}
}
TL.LogMessage(memberName, " is neither a .NET object nor a COM object!");
throw new MethodNotImplementedException(_strProgId + " " + memberName);
default:
return(null);
}
}
internal MemberFactory(string progId, TraceLogger ascomDriverTraceLogger)
{
//_tl = new TraceLogger("", "MemberFactory");
//_tl.Enabled = RegistryCommonCode.GetBool(GlobalConstants.DRIVERACCESS_TRACE, GlobalConstants.DRIVERACCESS_TRACE_DEFAULT);
TL = ascomDriverTraceLogger; // Save the supplied TraceLogger object for use in method calls
TL.LogMessage("ProgID", progId);
_strProgId = progId;
GetInterfaces = new List <Type>();
// Get Type Information
GetObjType = Type.GetTypeFromProgID(progId);
//check to see if it found the type information
if (GetObjType == null)
{
//no type information found throw error
throw new ASCOM.Utilities.Exceptions.HelperException("Check Driver: cannot create object type of progID: " + _strProgId);
}
//setup the property
IsComObject = GetObjType.IsCOMObject;
TL.LogMessage("IsComObject", GetObjType.IsCOMObject.ToString());
// Create an instance of the object
GetLateBoundObject = Activator.CreateInstance(GetObjType);
// Get list of interfaces but don't throw an exception if this fails
try
{
var objInterfaces = GetObjType.GetInterfaces();
foreach (Type objInterface in objInterfaces)
{
GetInterfaces.Add(objInterface);
TL.LogMessage("GetInterfaces", "Found interface: " + objInterface.AssemblyQualifiedName);
}
}
catch (Exception ex)
{
TL.LogMessageCrLf("GetInterfaces", "Exception: " + ex.ToString());
}
/*MemberInfo[] members = GetObjType.GetMembers();
* foreach (MemberInfo mi in members)
* {
* TL.LogMessage("Member", Enum.GetName(typeof(MemberTypes), mi.MemberType) + " " + mi.Name);
* if (mi.MemberType == MemberTypes.Method)
* {
* foreach (ParameterInfo pi in ((MethodInfo)mi).GetParameters())
* {
* TL.LogMessage("Parameter",
* " " + pi.Name +
* " " + pi.ParameterType.Name +
* " " + pi.ParameterType.AssemblyQualifiedName);
* }
* }
* }*/
//no instance found throw error
if (GetLateBoundObject == null)
{
TL.LogMessage("Exception", "GetLateBoudObject is null, throwing HelperException");
throw new ASCOM.Utilities.Exceptions.HelperException("Check Driver: cannot create driver instance of progID: " + _strProgId);
}
}
/// <summary>
/// Dispose the late-bound interface, if needed. Will release it via COM
/// if it is a COM object, else if native .NET will just dereference it
/// for GC.
/// </summary>
/// <returns>nothing</returns>
public void Dispose()
{
if (GetLateBoundObject != null)
{
try
{
if (IsComObject)
{
// Attempt to call Dispose first...
//run the COM object method
try
{
TL.LogMessageCrLf("Dispose COM", "This is a COM object, attempting to call its Dispose method");
GetObjType.InvokeMember("Dispose",
BindingFlags.Default | BindingFlags.InvokeMethod,
null,
GetLateBoundObject,
new object[] { },
CultureInfo.InvariantCulture);
TL.LogMessageCrLf("Dispose COM", "Successfully called its Dispose method");
}
catch (COMException ex)
{
if (ex.ErrorCode == int.Parse("80020006", NumberStyles.HexNumber, CultureInfo.InvariantCulture))
{
TL.LogMessageCrLf("Dispose COM", "Driver does not have a Dispose method");
}
}
catch (Exception ex)
{
TL.LogMessageCrLf("Dispose COM", "Exception " + ex.ToString());
}
TL.LogMessageCrLf("Dispose COM", "This is a COM object so attempting to release it");
var releaseComObject = Marshal.ReleaseComObject(GetLateBoundObject);
if (releaseComObject == 0)
{
GetLateBoundObject = null;
}
TL.LogMessageCrLf("Dispose COM", "Object Count is now: " + releaseComObject);
}
else // Should be a .NET object so lets dispose of it
{
TL.LogMessageCrLf("Dispose .NET", "This is a .NET object, attempting to call its Dispose method");
var methodInfo = GetObjType.GetMethod("Dispose");
if (methodInfo != null)
{
TL.LogMessage("Dispose .NET", " Got Dispose Method Info, Calling Dispose");
object result = methodInfo.Invoke(GetLateBoundObject, new object[] { });
TL.LogMessage("Dispose .NET", " Successfully called Dispose method");
}
else
{
TL.LogMessage("Dispose .NET", " No Dispose Method Info so ignoring the call to Dispose");
}
}
}
catch (Exception ex)
{
try
{
TL.LogMessageCrLf("Dispose", "Exception " + ex.ToString());
}
catch { }
} // Ignore any errors here as we are disposing
//if (TL != null) TL.Dispose(); no longer need to dispose of this as its now handled by AscomDriver
}
}
