/// <summary>
/// Internal method for better FetchExpression paging performance
/// </summary>
internal static void NextPage(this FetchExpression query, XDocument xDocument, string pagingCookie)
{
/// No paging mean PageInfo.Page = 0
/// for FetchXml it mean no "page" attribute or 0 value
string page = xDocument.Root.Attribute("page")?.Value;
int pageNumber = page != null?int.Parse(page) : 0;
xDocument.Root.SetAttributeValue("paging-cookie", pagingCookie);
xDocument.Root.SetAttributeValue("page", ++pageNumber);
query.Query = xDocument.ToString();
}
/// <summary>
/// Sets FetchExpression paging parameters to next page
/// </summary>
public static void NextPage(this FetchExpression query, string pagingCookie)
{
XDocument xDocument = XDocument.Parse(query.Query);
NextPage(query, xDocument, pagingCookie);
}