C# (CSharp) iTextSharp.xmp Пространство имен

These functions provide support for composing path expressions to deeply nested properties. The functions XMPMeta such as getProperty(), getArrayItem() and getStructField() provide easy access to top level simple properties, items in top level arrays, and fields of top level structs. They do not provide convenient access to more complex things like fields several levels deep in a complex struct, or fields within an array of structs, or items of an array that is a field of a struct. These functions can also be used to compose paths to top level array items or struct fields so that you can use the binary accessors like getPropertyAsInteger().

You can use these functions is to compose a complete path expression, or all but the last component. Suppose you have a property that is an array of integers within a struct. You can access one of the array items like this:

 String path = XMPPathFactory.composeStructFieldPath (schemaNs, "Struct", fieldNs, "Array"); String path += XMPPathFactory.composeArrayItemPath (schemaNs, "Array" index); PropertyInteger result = xmpObj.getPropertyAsInteger(schemaNs, path); 

 String path = XMPPathFactory.composeStructFieldPath (schemaNs, "Struct", fieldNs, "Array"); PropertyText xmpObj.getArrayItem (schemaNs, path, index); 

Note: It might look confusing that the schemaNs is passed in all of the calls above. This is because the XMP toolkit keeps the top level "schema" namespace separate from the rest of the path expression. Note: These methods are much simpler than in the C++-API, they don't check the given path or array indices. @since 25.01.2006