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Saxon API for .NET |

# XQueryCompiler.Compile Method (Stream)

Compile a query supplied as a Stream.

public XQueryExecutable Compile(
Stream query
);

#### Parameters

query
  A stream containing the source text of the query

#### Return Value

An `XQueryExecutable` which represents the compiled query object. The XQueryExecutable may be run as many times as required, in the same or a different thread. The `XQueryExecutable` is not affected by any changes made to the `XQueryCompiler` once it has been compiled.

#### Remarks

The XQuery processor attempts to deduce the encoding of the query by looking for a byte-order-mark, or if none is present, by looking for the encoding declaration in the XQuery version declaration. For this to work, the stream must have the `CanSeek` property. If no encoding information is present, UTF-8 is assumed.

The base URI of the query is set to the value of the `BaseUri` property. If this has not been set, then the base URI will be undefined, which means that any use of an expression that depends on the base URI will cause an error.

#### Exceptions

Exception Type | Condition
--- | ---
StaticError | Throws a StaticError if errors were detected during static analysis of the query. Details of the errors will be added as StaticError objects to the ErrorList if supplied; otherwise they will be written to the standard error stream. The exception that is returned is merely a summary indicating the status.

#### Example

                XQueryExecutable q = compiler.Compile(new FileStream("input.xq", FileMode.Open, FileAccess.Read));

#### See Also

XQueryCompiler Class | Saxon.Api Namespace | XQueryCompiler.Compile Overload List