SQL CLR: Streaming table valued function results

Question

My issue is very similar to this issue.

However, I\'m using SQL Server 2005 Service Pack 2 (SP2) (v9.0.3042) and the solution posted there does not work for me. I tried

Answer 1

Googling for this:

Data access is not allowed in this context. Either the context is a function or method not marked with DataAccessKind.Read or SystemDataAccessKind.Read, is a callback to obtain data from FillRow method of a Table Valued Function, or is a UDT validation method.

Led me to this page, but without the answer I needed.
I eventually figured out what it was.
In my CLR Function, I was calling another Method and passing in the values the Function had recieved.

Sounds innocuous, but what I had done was used the same datatypes (SqlChars, SqlBoolean, SqlInt32) for the input-parameters of the Method I added.

private static ArrayList FlatFile(SqlChars Delimeter, SqlChars TextQualifier)

Apparently using these datatypes for anything other than a CLR SqlFunction or SqlProcedure can sometimes give you this type of cryptic error.

Once I removed those datatypes on my new Method and used the C# ones (string, bool, int), the error finally went away.

private static ArrayList FlatFile(string Delimeter, string TextQualifier)

NOTE: This only errored out when I was using Impersonation to grab a file from another Domain.
When I streamed the file over the local Domain, I didn't receive this error, which is what threw me off.

I hope this helps you in your time of need. I blew way too many hours troubleshooting this.