The name of the query parameter that can contain the post-back ID with which files in the request should be associated.
The name of the query parameter that can contain the post-back ID with which files in the request should be associated.
For example, if PostBackIDQueryParam is "NeatUpload_PostBackID", then if a request is received with a query string of "NeatUpload_PostBackID=123ABC", all files in the request will be assocated with post-back ID "123ABC". The post-back ID must not contain the character "-".