public static string AddSortExpression(string sortMetaData, SortExpression sortExpression)
{
SortExpressionCollection sortExpressions = PagedInfo.GetSortExpressions(sortMetaData);
int num = sortExpressions.FindIndex((SortExpression s) => s.Expression == sortExpression.Expression);
if (num != 0)
{
if (num > 0)
{
sortExpressions.RemoveAt(num);
}
sortExpressions.Insert(0, sortExpression);
if (sortExpressions.Count > 3)
{
sortExpressions.RemoveRange(3, 1);
}
}
else
{
sortExpressions[0].ToggleDirection();
}
return(sortExpressions.Serialize());
}
public SortExpressionCollection GetSortExpressions()
{
return(PagedInfo.GetSortExpressions(this.SortMetaData));
}
public static string GetSortDescription(string sortMetaData)
{
return(PagedInfo.GetSortExpressions(sortMetaData).ToString());
}