asp.net – 对数据绑定集合或对象列表时对gridview进行排序

我怀疑jQuery方法会更快,不需要完整的回发.

using System.Linq.Expressions;

public SortDirection GridViewSortDirection
{
    get
    {
        if (ViewState["sortDirection"] == null)
            ViewState["sortDirection"] = SortDirection.Ascending;

        return (SortDirection)ViewState["sortDirection"];
    }
    set { ViewState["sortDirection"] = value; }
}

protected void gridView_Sorting(object sender,GridViewSortEventArgs e)
{
    //re-run the query,use linq to sort the objects based on the arg.
    //perform a search using the constraints given 
    //you could have this saved in Session,rather than requerying your datastore
    List<T> myGridResults = PerfomSearch();


    if (myGridResults != null)
    {
        var param = Expression.Parameter(typeof(T),e.SortExpression);
        var sortExpression = Expression.Lambda<Func<T,object>>(Expression.Convert(Expression.Property(param,e.SortExpression),typeof(object)),param);


        if (GridViewSortDirection == SortDirection.Ascending)
        {
            myGridView.DataSource = myGridResults.AsQueryable<T>().OrderBy(sortExpression);
            GridViewSortDirection = SortDirection.Descending;
        }
        else
        {
            myGridView.DataSource = myGridResults.AsQueryable<T>().OrderByDescending(sortExpression);
            GridViewSortDirection = SortDirection.Ascending;
        };


        myGridView.DataBind();
    }
}