GridView排序: SortDirection

Question

我有一个ASP网格视图排序的问题。我犯了一个错误，但我找不到it...grid总是按一个方向排序。

    string _ordering_fieldname
            {
                get { return ViewState["column"] == null ? "adr" : (string)ViewState["column"]; }
                set { ViewState["column"] = value; }
            }

            string _ordering_direction
            {
                get { return ViewState["direction"] == null ? "asc" : (string)ViewState["direction"]; }
                set { ViewState["direction"] = value; }
            }

protected void Spisok_Sorting(object sender, GridViewSortEventArgs e)
        {
            _OrderingField ordering = new _OrderingField(e.SortExpression);
            switch (e.SortDirection)
            {
                case SortDirection.Ascending: ordering.orderingDirection = OrderingDirection.Ascending; _ordering_direction = "asc"; break;
                case SortDirection.Descending: ordering.orderingDirection = OrderingDirection.Descending; _ordering_direction = "desc"; break;
                default: ordering.orderingDirection = OrderingDirection.Ascending; _ordering_direction = "asc"; break;
            }
            _ordering_fieldname = ordering.fieldName;

            //here I call refreshing my grid with sorting
        }

Answer 1

当然，您需要使用您的_ordering_fieldname和_ordering_direction值

//here I call refreshing my grid with sorting
var dt = GetFromDatabaseFunction();
var dv = dt.DefaultView();
dv.Sort = _ordering_fieldname + " " + _ordering_direction;

GridView1.DataSource = dv.ToTable();
GridView1.DataBind();