Traders' Roundtable

is it possible to write to the api using C#? api support is somewhat lacking, which is why i'm posting this here.

there is some demo code included as part of the UA download, but the examples are in VBA or C++.

[edit: i know you could probably create a wrapper class for the C++ code but i'd rather not.]

CSI API uses a COM interface. C# should support that without too much of an effort.

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Bernd wrote:

is it possible to write to the api using C#?

Yes.

Direct Access requires the use of the ATL interface. Much more work than is necessary given the built-in support C# has for COM.

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Thanks for the responses. Writing to the API is straightforward, even if the documentation/support are somewhat lacking.

When finished with the UA API, is there a method to dispose of the object? I asked CSI and their response was uaApi2 delete; (where uaApi2 is API2Class object), but that results in an error.

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Thanks Bernd. My (limited) understanding is that it's good practice to dispose of objects, in spite of the garbage collection --- this seems to be why using{...} is recommended, as it implicitly calls .dispose(). But I'm a n00b to C# and am very happy to be corrected by those more knowledgeable!

I spoke to an experienced C# programmer, who said that it's not necessary to use .Close() or .Dispose(). I live and learn...

Is there a way to avoid downloading cash data? I have set uaApi2.FillInCashPrice = 0; but the cash data still downloads. The API documentation (such as it is) says "non-zero is true", so I don't think the issue is '0' rather than 'false'.

EDIT: To skip cash data, you'll need something like if(CSIdeliveryCode != 54){ ... }.