[amibroker] How to use (ole) Retrieve() Quotations from C# ??

["tiedemj" <home@xxxxxxxxxxxx>]

So close, but not yet there... Hi - I've been trying to use Retrieve
() from Quotations in C# using the description found here:

http://groups.google.com/group/microsoft.public.dotnet.framework.inter
op/msg/010238fcb89f94ee

Below is the code. The ole call goes fine - but it only returns the
initialized values in the parameters going in - not the actual quotes.

Anybody knows how to use Retrieve() from c#? I've seen a number of
posts with the same question - but not yet found an answer. Thought I
got it made below - but so far no cigar...

Any help (really, really) appreciated!

Best regards
Jens Tiedemann





public void GetQuotations(
string ticker,
object stocks)
{
// Set up the parameter array for the InvokeMethod call.
// Initialize each element (to avoid nonInitialized compiler error).
object[] ParamArray = new object[8];
ParamArray[0] = (long) 1;
ParamArray[1] = DateTime.Now;
ParamArray[2] = (float) 0;
ParamArray[3] = (float) 0;
ParamArray[4] = (float) 0;
ParamArray[5] = (float) 0;
ParamArray[6] = (float) 0;
ParamArray[7] = (float) 0;

// Set up the ParameterModifier array.
// There are 8 parameters. Note that
// the ParameterModifier constructor is given the number of
// parameters
// in the method. The indexer is used to specify which
// parameters are out parameters.

ParameterModifier[] ParamMods = new ParameterModifier [1];
ParamMods[0] = new ParameterModifier (8);
// inititialize with number of method parameters
ParamMods[0][0] = false; // Set the 1st param to be an out param
ParamMods[0][1] = true; // set the 2nd param to be an out param
ParamMods[0][2] = true; // set the 3rd param to be an out param
ParamMods[0][3] = true; // set the 4th param to be an out param
ParamMods[0][4] = true; // set the 5th param to be an out param
ParamMods[0][5] = true; // set the 6th param to be an out param
ParamMods[0][6] = true; // set the 7th param to be an out param
ParamMods[0][7] = true; // set the 8th param to be an out param

// Set the call up - amiMethod/getAmiProperty do what they indicate
// and are well tested
object stock = amiMethod(stocks, "Item", ticker);
object quotations = getAmiProperty(stock, "Quotations");
string methodName = "Retrieve";

// Call the version of InvokeMember that
// accepts a ParameterModifier array.
long ReturnValue = 0;
try
{

ReturnValue = (long)quotations.GetType().InvokeMember(
methodName, // method name
BindingFlags.Default | BindingFlags.InvokeMethod,
null,
quotations, // obj being called
ParamArray, // argument list
ParamMods, // ParameterModifier array
null,
null);
}
catch (Exception ex)
{
setError("amiMethod: " + methodName + " failed!", ex);
}
// "Unpack" the byRef received values
float Date = Convert.ToDateTime(ParamArray[1]);
float Open = Convert.ToSingle(ParamArray[2]);
float High = Convert.ToSingle(ParamArray[3]);
float Low = Convert.ToSingle(ParamArray[4]);
float Close = Convert.ToSingle(ParamArray[5]);
float Volume = Convert.ToSingle(ParamArray[6]);
float OpenInt = Convert.ToSingle(ParamArray[7]);

}





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