public ActionResult Search(object entity)
{
var query = Request.QueryString["q"];
var results = new SearchResults();
results.QueryText = query;
if (!String.IsNullOrEmpty(query))
{
//Initialize the connection to the search index
Connection conn = new Connection("http://localhost:8080/solr/collection1");
var parameters = new NameValueCollection();
//Set the query
parameters["q"] = String.Format("\"{0}\"", query);
//Add highlighting - enables summary field be auto-generated if empty
parameters.Add("hl", "true");
//Add publication id
parameters.Add("fq", "publicationid:4");
//Set page size
parameters.Add("rows", "5");
//Add page number (default is 1)
String start = Request.QueryString["start"];
if (!String.IsNullOrEmpty(start))
{
parameters["start"] = start;
}
results = conn.ExecuteQuery(parameters);
}
results.QueryText = query;
return View("SearchResults",results);
}
/// <summary>
/// Run a query
/// </summary>
/// <param name="parameters">querystring parameters for the query URL</param>
/// <returns>matching results</returns>
public SearchResults ExecuteQuery(NameValueCollection parameters)
{
var results = new SearchResults();
try
{
string url = BuildQueryUrl(SetParameters(parameters));
//_log.DebugFormat("Query: {0}", url);
results.QueryUrl = url;
string data = GetData(url);
results = ProcessResults(results, data);
results.PageSize = Int32.Parse(parameters["rows"]);
//_log.DebugFormat("{0} Results from Query: {1}", results.Total, url);
}
catch (Exception ex)
{
results.HasError = true;
results.ErrorDetail = ex.Message + " : " + ex.StackTrace;
//_log.ErrorFormat("Query resulted in error: {1}", results.ErrorDetail);
}
return results;
}
protected SearchResults ProcessResults(SearchResults results, string data)
{
if (!String.IsNullOrEmpty(data))
{
XDocument xmlData = XDocument.Parse(data);
//All statuses other than zero are error states
string status = xmlData.Root.Elements("lst").Where(a => a.Attribute("name").Value == "responseHeader").Elements("int").Where(a => a.Attribute("name").Value == "status").FirstOrDefault().Value;
if (status != "0")
{
results.HasError = true;
results.ErrorDetail = "Solr error status: " + status;
//_log.ErrorFormat("Query resulted in error: {1}", results.ErrorDetail);
return results;
}
var highlighting = xmlData.Root.Elements("lst").Where(a => a.Attribute("name").Value == "highlighting").FirstOrDefault();
XElement result = xmlData.Root.Element("result");
results.Total = ((int?)result.Attribute("numFound") ?? 0);
//Solr uses 0-based indexing
results.Start = ((int?)result.Attribute("start") ?? 0) +1;
foreach (var item in result.Elements("doc"))
{
results.Items.Add(ProcessResult(item,highlighting));
}
}
return results;
}