/// <summary>
/// 根据新的排序部分预取 URL，同时页序号被重置为初始值。如果指定的字段为当前所使用的排序字段，则反转之
/// </summary>
/// <param name="fieldName"></param>
/// <param name="descendAsDefault"></param>
/// <returns></returns>
public string PrefetchNewToggleSortUrl(string fieldName, bool descendAsDefault)
{
fieldName = RetrieveFieldName(fieldName);
ISortPart sortPart = null;
if (this.m_sorts.Count == 0)
{
sortPart = new SortPart(fieldName, descendAsDefault);
}
else if (this.OneSortOnly)
{
ISortPart existed = this.m_sorts[0] as ISortPart;
if (string.Compare(existed.FieldName, fieldName, true) == 0)
{
sortPart = new SortPart(fieldName, !existed.Descend);
}
else
{
sortPart = new SortPart(fieldName, descendAsDefault);
}
}
else
{
ISortPart existed = null;
IList<ISortPart> sorts = new List<ISortPart>();
foreach (ISortPart sort in this.m_sorts)
{
if (string.Compare(sort.FieldName, fieldName, true) != 0)
{
sorts.Add(sort);
}
else
{
existed = sort;
}
}
if (existed != null)
{
sortPart = new SortPart(fieldName, !existed.Descend);
}
else
{
sortPart = new SortPart(fieldName, descendAsDefault);
}
sorts.Insert(0, sortPart);
}
return BuildUrl(this.m_filters, new ISortPart[] { sortPart }, FIRST_PAGE_INDEX);
}
/// <summary>
/// 根据新的排序部分预取 URL，同时页序号被重置为初始值
/// </summary>
/// <param name="fieldName"></param>
/// <param name="descend"></param>
/// <returns></returns>
public string PrefetchNewSortUrl(string fieldName, bool descend)
{
fieldName = RetrieveFieldName(fieldName);
ISortPart sortPart = new SortPart(fieldName, descend);
if (this.OneSortOnly || this.m_sorts.Count == 0
|| ((this.m_sorts.Count == 1) && (string.Compare((this.m_sorts[0] as ISortPart).FieldName, fieldName, true) == 0)))
{
return BuildUrl(this.m_filters, new ISortPart[] { sortPart }, FIRST_PAGE_INDEX);
}
else
{
IList<ISortPart> sorts = new List<ISortPart>();
sorts.Add(sortPart);
foreach (ISortPart sort in this.m_sorts)
{
if (string.Compare(sort.FieldName, fieldName, true) != 0)
{
sorts.Add(sort);
}
}
return BuildUrl(this.m_filters, sorts, FIRST_PAGE_INDEX);
}
}
