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I am trying to sort a column 'mem_id 'in already generated gridview. I dont get the result. Hereunder are my codes:

<asp:GridView ID="GridView2" runat="server"  HorizontalAlign="Center"  AutoGenerateColumns="False" allowpaging="True"  AllowSorting="True"
OnSorting="GridView2_Sorting" PageSize="12" onpageindexchanging="GridView2_PageIndexChanging" onselectedindexchanged="GridView2_SelectedIndexChanged"
  style="border-color: #808000; font-size:small; top: 176px; left: 27px; position: absolute; height: 75px; width:1350px" >

            <RowStyle HorizontalAlign="Center" />
            <Columns >
            <asp:BoundField DataField="mem_id" HeaderText="Mem_ID" sortexpression="Mem_id"/>
            <asp:BoundField DataField="mem_name" HeaderText="Mem Name"/>
            <asp:BoundField DataField="mobile" HeaderText="Cell No:"/>

code behind:

protected void GridView2_Sorting(object sender, GridViewSortEventArgs e)
GridView Gridview2 = (GridView)sender;
SqlDataSource ds = (SqlDataSource)Gridview2.DataSource;
ds.SelectCommand = ds.SelectCommand + " order by "
+ e.SortExpression;
Gridview2.DataSource = ds;

Can anyone guide me?
Posted 11-Jul-13 5:45am
Edited 11-Jul-13 5:51am
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Solution 1

Create a sort property for the Sorting type
public SortDirection sortProperty
            if (ViewState["SortingState"] == null)
                ViewState["SortingState"] = SortDirection.Ascending;
            return (SortDirection)ViewState["SortingState"];
            ViewState["SortingState"] = value;

and inside the Sorting method

 dsProjects = projectDetails.GetProjectHistory(UserName);
        if (sortProperty == SortDirection.Ascending)
            sortProperty = SortDirection.Descending;
            sortingDirection = "Desc";
            sortProperty = SortDirection.Ascending;
            sortingDirection = "Asc";
        DataView sortedView = new DataView(dsProjects.Tables[0]);
        sortedView.Sort = e.SortExpression + " " + sortingDirection;
        gvProjectHistory.DataSource = sortedView;

also check this links, it may helps you[^][^]
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Solution 2

this is very old method of viewstate i have new idea do this


when user click on row then get value of attribute that is lastsort and its value is asc

and when clicked change attribute style to
so second time you get desc and vice versa its working excellent for me.....

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