Custom Enterprise Search Webpart in SharePoint 2010

Normally we use out of the Box SharePoint Search, but sometimes there is custom requirement in which we need to use Custom Search Webpart.

Here is a small portion of code to write for custom Enterprise Search Webpart.

Sample Code:

protected System.Web.UI.WebControls.DataGrid grdEntrerpriseSearchResults = new DataGrid();

protected override void CreateChildControls()

{

string strSearchQry;

using (SPSite site = new SPSite(SPContext.Current.Site.Url .ToString()))

            {

               strSearchQry = BuildFullTextSqlQuery(false);

Microsoft.Office.Server.Search.Query.FullTextSqlQuery qryFullText = newMicrosoft.Office.Server.Search.Query.FullTextSqlQuery(site);

               qryFullText.QueryText = strSearchQry;

               qryFullText.ResultTypes = Microsoft.Office.Server.Search.Query.ResultType.RelevantResults;

               qryFullText.TrimDuplicates = true;

               qryFullText.EnableStemming = true;

               qryFullText.RowLimit = 50;

               qryFullText.Timeout = 120000;

               Microsoft.Office.Server.Search.Query.ResultTableCollection results = qryFullText.Execute();

               Microsoft.Office.Server.Search.Query.ResultTable relevantResults = results[Microsoft.Office.Server.Search.Query.ResultType.RelevantResults];

               DataTable resultsDataTable = new DataTable();

               resultsDataTable.Load(relevantResults, LoadOption.OverwriteChanges);

               grdEntrerpriseSearchResults.DataSource = resultsDataTable;

               grdEntrerpriseSearchResults.DataBind();

            }

            this.Controls.Add(grdEntrerpriseSearchResults);

        }

        private string BuildFullTextSqlQuery(bool bDocumentsOnly)

        {

            string sRetval = string.Empty;

            string sSelectQuery = "SELECT Title, Path, Size, HitHighlightedSummary FROM Scope() ";

            string sWhereQuery = string.Empty;

            sWhereQuery = " WHERE (\"SCOPE\" = 'SiteName') AND (IsDocument=1) ";

           if (bDocumentsOnly == true)

                 sWhereQuery = " WHERE IsDocument=1 AND (\"SCOPE\" = 'All')";

             else

                 sWhereQuery = " WHERE IsDocument=0 AND (\"SCOPE\" = 'All')";

      

            sWhereQuery += " AND FREETEXT(*, 'Keyword') ";

            string sOrderByQuery = "  ORDER BY Rank DESC ";

         

            if (bDocumentsOnly == false)

            {

                sWhereQuery += " AND ContentClass='STS_Web'";

            }

            sRetval = sSelectQuery + sWhereQuery + sOrderByQuery;

        

            sRetval = sSelectQuery + sWhereQuery + sOrderByQuery;

            return sRetval;

        }