Convert lambda expression to string

This may seem like an odd request, however with APIs that require a filter property string I thought it would be a nice concept to be able to convert a provided typ开发者_高级运维e safe lambda expression which could then be compiled into a query string - similar in essence to Linq -> SQL.

So for example:

 Func<TQueryObj, bool> 
 (invoice) => { invoice.Status == "DRAFT" && invoice.Type == "ACCREF" };

Would convert to

 Status=="DRAFT" && Type=="ACCREF"

I'm using an invoicing API at the moment hence the example. Any means of achieving this fairly simply?

Cheers

You need to make an inherited ExpressionVisitor, which will recursively crawl through an Expression<Func<...>>.
It won't be easy.