WebPart: Display the search result in an spgridview with filter and sort

Question

hi,
For explain more in details.
I need the search result in a table displaying some meta common in the different library.
I've to have the possibility to filter and sort the grid.
i'm trying to extend Microsoft.Office.Server.Search.WebControls.CoreResultsWebPart
i can have the result from the textbox search with: SharedQueryManager.GetInstance(this.Page).QueryManager
My queryManager is populate in the method: CreateChildControls
I put the sample code i use. and in the populateData method, my querymanager is null while in the createChildContriol, it's correctly populate with : this.queryManager = SharedQueryManager.GetInstance(this.Page).QueryManager;
using System;
using System.ComponentModel;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using Microsoft.SharePoint;
using Microsoft.SharePoint.WebControls;
using Microsoft.SharePoint.Search.Internal.WebControls;
using Microsoft.Office.Server.Search.Query;
using Microsoft.Office.Server.Search.WebControls;
using System.Data;
using System.Xml;
namespace CustomSearchResultWebPart.CustomCoreResultWebPart
[ToolboxItemAttribute(false)]
public class CustomCoreResultWebPart : Microsoft.Office.Server.Search.WebControls.CoreResultsWebPart
private ObjectDataSource objDS;
private const string ObjectDataSourceID = "gridViewDataSource";
private QueryManager queryManager;
private SPGridView gridView = new SPGridView();
protected override void CreateChildControls()
//here is correctly populate
this.queryManager = SharedQueryManager.GetInstance(this.Page).QueryManager;
try
LoadSearchGrid();
catch (Exception ex)
Page.Response.Write(ex.Message + " - " + ex.StackTrace);
//base.CreateChildControls();
protected override void OnInit(EventArgs e)
base.OnInit(e);
protected override void OnLoad(EventArgs e)
base.OnLoad(e);
protected override void OnPreRender(EventArgs e)
//gridView.DataBind();
base.OnPreRender(e);
protected override void Render(HtmlTextWriter writer)
base.Render(writer);
public DataTable populateData()
DataSet dtSet = null;
DataTable dtTable = null;
//here is my query manager is null
if (queryManager != null && queryManager.Count > 0)
XmlDocument xdoc = new XmlDocument(); //We are using XmlDocument
xdoc = queryManager.GetResults(queryManager[0]);//xml returned by search
if (xdoc != null)
XmlReader xmlReader = new XmlNodeReader(xdoc);
dtSet = new DataSet();
dtSet.ReadXml(xmlReader);
if (dtSet.Tables.Count > 1)
dtTable = dtSet.Tables["Result"];
return dtTable;
private void LoadSearchGrid()
this.objDS = new ObjectDataSource();
this.objDS.ID = ObjectDataSourceID;
this.objDS.SelectMethod = "populateData";
this.objDS.TypeName = this.GetType().AssemblyQualifiedName;
this.objDS.ObjectCreating += new ObjectDataSourceObjectEventHandler(objDS_ObjectCreating);
this.Controls.Add(objDS);
gridView.ID = "_gridView";
gridView.AutoGenerateColumns = false;
gridView.Width = new Unit(100, UnitType.Pixel);
gridView.EnableViewState = false;
gridView.AllowPaging = true;
gridView.PageSize = 5;
gridView.DataSourceID = ObjectDataSourceID;
this.Controls.Add(gridView);
void objDS_ObjectCreating(object sender, ObjectDataSourceEventArgs e)
//e.ObjectInstance = objDS;
protected void gridView_RowDataBound(object sender, GridViewRowEventArgs e)
//throw new NotImplementedException();
Do you have a sample that i can use or some tutorial?
thanks for your help

Answer 1

I added this in my class
public class CustomResultsDatasource : CoreResultsDatasource
public CustomResultsDatasource(Microsoft.Office.Server.Search.WebControls.CoreResultsWebPart parentWebPart)
: base(parentWebPart)
View = new CustomResultsDatasourceView(this, GetType().Name);
public class CustomResultsDatasourceView : CoreResultsDatasourceView
public CustomResultsDatasourceView(SearchResultsBaseDatasource dataSourceOwner, string viewName)
: base(dataSourceOwner, viewName)
//make sure we have a value for the datasource
if (DataSourceOwner == null)
throw new ArgumentNullException("DataSourceOwner");
CustomResultsDatasource datasource = this.DataSourceOwner as CustomResultsDatasource;
this.QueryManager = SharedQueryManager.GetInstance(datasource.ParentWebpart.Page).QueryManager;
And this in my customSearchResultWebPart
protected override void CreateDataSource()
//base.CreateDataSource();
this.DataSource = new CustomResultsDatasource(this);
How can i use queryManager in populateData?
thanks for your help