Sorting with the dataset

[Saran kumar]

hi
im having a grid as shown in the attachement. i need to sort the grid with the dataset in binding into the grid. im calling an sp for the dataset.
the code is :

objBizReport = new BizReport();

                DataSet dsReport = objBizReport.GetDeletedLeads(orgId, fromDate, toDate);

gvReport_Leads.DataSource = dsReport.Tables[2];
                        gvReport_Leads.DataBind();

i dont have any parameter called ASC/DESC to pass each time on sort command. pleas help me on this.

<telerik:RadGrid ID="gvReport_Leads" runat="server" CssClass="radgrid" AllowPaging="True"
                EnableEmbeddedSkins="false" ShowFooter="false" AutoGenerateColumns="False" GridLines="None"
                AllowSorting="True" Width="800 px" AllowMultiRowSelection="true" OnItemDataBound="gvReport_Leads_ItemDataBound"
                OnSortCommand="gvReport_Leads_SortCommand">
                <MasterTableView CssClass="radgridMasterTable" AllowCustomSorting="true" Width="100%"
                    ShowHeadersWhenNoRecords="true" TableLayout="Fixed" ClientDataKeyNames="lead_id">

i used gridbound columns with above grid declaration and mastertable view.

the sorting command:

protected void gvReport_Leads_SortCommand(object source, GridSortCommandEventArgs e)
        {

                GridSortExpression sortExpr = new GridSortExpression();
                switch (e.OldSortOrder)
                {
                    case GridSortOrder.None:
                        sortExpr.FieldName = e.SortExpression;
                        sortExpr.SortOrder = GridSortOrder.Descending;

                        e.Item.OwnerTableView.SortExpressions.AddSortExpression(sortExpr);
                        break;
                    case GridSortOrder.Ascending:
                        sortExpr.FieldName = e.SortExpression;
                        sortExpr.SortOrder = gvReport_Leads.MasterTableView.AllowNaturalSort ? GridSortOrder.None : GridSortOrder.Descending;
                        e.Item.OwnerTableView.SortExpressions.AddSortExpression(sortExpr);
                        break;
                    case GridSortOrder.Descending:
                        sortExpr.FieldName = e.SortExpression;
                        sortExpr.SortOrder = GridSortOrder.Ascending;

                        e.Item.OwnerTableView.SortExpressions.AddSortExpression(sortExpr);
                        break;
                }

                e.Canceled = true;
                gvReport_Leads.Rebind();

sort command tries sorting but its not refelcting any change in order in the grid, i cannot implement onneedsource since im using SP or dataset. please help, i think if i have onneeddatasource for the above senario, it will work. help me in coding onneeddata source for this.

[Pavlina]

Hi Saran,

The advantage of using the NeedDataSource event is that you have the flexibility of generating your data source in the code-behind, but are freed from handling the logic of when and how data-binding should take place.
Please, check out this articles, which elaborates on how to use NeedDataSource event:
http://www.telerik.com/help/aspnet-ajax/grid-advanced-data-binding.html
http://demos.telerik.com/aspnet-ajax/grid/examples/programming/needdatasource/defaultcs.aspx

Regards,
Pavlina
the Telerik team

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[Saran kumar]

on the link u sent they have just used SQL query for retriving records.

protected void RadGrid1_NeedDataSource(object source, Telerik.Web.UI.GridNeedDataSourceEventArgs e)
        {
            RadGrid1.DataSource = GetDataTable("SELECT CustomerID, CompanyName, ContactName, ContactTitle, Address, PostalCode FROM Customers");
        }
    }

but in my case i used

protected void RadGrid1_NeedDataSource(object source, GridNeedDataSourceEventArgs e)
        {
                        int orgId;
            string fromDate = Request.QueryString["fromdate"].ToString();
            string toDate = Request.QueryString["todate"].ToString();
            orgId = UserSession.OrgId;
            objBizReport = new BizReport();

            DataSet dsReport = objBizReport.GetDeletedLeads(orgId, fromDate, toDate);
            gvReport_Leads.DataSource = dsReport.Tables[2];
            //gvReport_Leads.Rebind();
        }

but i cant make it its throwing an exception

[Pavlina]

Hello Saran,

Attached to this message is as simple working project which handles the desired functionality. Please, give it a try and let me know if you need additional assistance.

I hope this helps.

Best wishes,
Pavlina
the Telerik team

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Watch a video on how to optimize your support resource searches and check out more tips on the blogs.