如何使 asp:GridView 可排序？

Question

我有一个asp:GridView 控件，我已将AllowSorting="True" 属性设置为：

<asp:GridView ID="gridUsers" runat="server" PageSize="100" ShowHeaderWhenEmpty="True"
   Width="100%" AllowSorting="True" onrowcreated="gridUsers_RowCreated" 
   onsorting="gridUsers_Sorting">
</asp:GridView>

在设计时，网格看起来是可排序的：

但在运行时只有中间列是可排序的：

如何在 ASP.NET 中使asp:GridView 可排序？

---

注意：asp:GridView 和 AllowSorting 需要存在一个 Sorting 事件处理程序：

protected void gridUsers_Sorting(object sender, GridViewSortEventArgs e)
{
   //asp:GridView will throw an exception if a Sorting event handler isn't present
}

更新：我意识到描述栏的特别之处。它是数据库中唯一显示名称正确的列原样。其余列i have to fix the display name to be presentable：

protected void gridUsers_RowCreated(object sender, GridViewRowEventArgs e)
{
   e.Row.Cells[0].Visible = false; //UserGUID
   e.Row.Cells[1].Text = "User name";
   e.Row.Cells[2].Text = "Full name";
   //3=Description
   e.Row.Cells[4].Text = "E-mail";
   e.Row.Cells[5].Text = "Active";
       e.Row.Cells[5].Visible = false;
   e.Row.Cells[6].Text = "Account type";
 }

现在我只需要找出棘手的部分；并使列可排序。

Answer 1

protected void gridUsers_Sorting(object sender, GridViewSortEventArgs e)
{
    DataTable dt = Session["SortedTable"] as DataTable;

    if (dt != null)
    {

      //Sort the data.
      dt.DefaultView.Sort = e.SortExpression + " " + GetSortDirection(e.SortExpression);
      gridUsers.DataSource = Session["SortTable"];
      gridUsers.DataBind();
    }
}

改编自msdn example：

Answer 2

这段代码肯定会对你有所帮助：

在 GridView 中，使属性 AllowSorting = "True" 并在 GridView Columns 中像这样给出

<asp:BoundField DataField="UserName" HeaderText="User Name" SortExpression="UserName" />
<asp:BoundField DataField="FullName" HeaderText="Full Name" SortExpression="FullName" />

并使用以下编码：

protected void gv_Sorting(object sender, GridViewSortEventArgs e)
{
    try
    {
        string sortExpression = e.SortExpression;
        ViewState["z_sortexpresion"] = e.SortExpression;
        if (GridViewSortDirection == SortDirection.Ascending)
        {
            GridViewSortDirection = SortDirection.Descending;
            SortGridView(sortExpression, "DESC");
        }
        else
        {
            GridViewSortDirection = SortDirection.Ascending;
            SortGridView(sortExpression, "ASC");
        }
    }
    catch (Exception ex)
    {
        return ex.Message.ToString();
    }
}
public SortDirection GridViewSortDirection
{
    get
    {
        if (ViewState["sortDirection"] == null)
            ViewState["sortDirection"] = SortDirection.Ascending;
        return (SortDirection)ViewState["sortDirection"];
    }
    set
    {
        ViewState["sortDirection"] = value;
    }

}
private void SortGridView(string sortExpression, string direction)
{
    DTSorting = new DataView(DTSorting, "", sortExpression + " " + direction, DataViewRowState.CurrentRows).ToTable();
    gv.DataSource = DTSorting;
    gv.DataBind();
}
public DataTable DTSorting
{
    get
    {
        if (ViewState["Sorting"] != null)
        {
            return (DataTable)ViewState["Sorting"];
        }
        else
            return null;
    }
    set
    {
        ViewState["Sorting"] = value;
    }
}

在这里，考虑“DTSorting”是您绑定 GridView“gv”的 DataTable。