private void Search(object parametersObject)
{
string[] parameters = parametersObject as string[];
string searchText = parameters[0];
string searchLanguage = parameters[1];
string searchLocation = parameters[2];
string uriString =
String.Format(@"{0}/cgi-bin/advsearch_db.cgi?perPage=100&listStart={2}&r1=V1&title1={0}&author1=&year1=&year2=&subject1=Any&language1={1}&scentre=Any&search=Search",
searchLocation,
searchText,
searchLanguage,
(pageNumberUpDown.Value - 1) * 100
);
try
{
HttpWebRequest request = WebRequest.Create(uriString) as HttpWebRequest;
HttpWebResponse response = request.GetResponse() as HttpWebResponse;
Stream stream = response.GetResponseStream();
StreamReader reader = new StreamReader(stream);
string htmlString = reader.ReadToEnd();
int index = htmlString.IndexOf(@"Search matched");
if (index == -1)
{
this.Invoke(new ShowMessageDelegate(ShowMessage), "No results found");
return;
}
htmlString = htmlString.Substring(0, index);
Regex hrefRegex = new Regex("<a href=\"([^\"]*)\"");
MatchCollection matches = hrefRegex.Matches(htmlString);
int i = ((int)pageNumberUpDown.Value - 1) * 100 + 1;
EmptyDelegate beginUpdateDelegate = delegate { this.listViewSearch.BeginUpdate(); };
this.listViewSearch.Invoke(beginUpdateDelegate);
foreach (Match m in matches)
{
string link = searchLocation + m.Groups[1].Value;
DLISearchItem item = new DLISearchItem(link, i++);
this.listViewSearch.Invoke(new AddLinkItemDelegate(AddLinkItem), item);
}
EmptyDelegate endUpdateDelegate = delegate { this.listViewSearch.EndUpdate(); };
this.listViewSearch.Invoke(endUpdateDelegate);
this.listViewSearch.EndUpdate();
if (listViewSearch.Items.Count == 100)
{
EmptyDelegate updatePageNumber = delegate() { this.pageNumberUpDown.Value++; };
this.pageNumberUpDown.Invoke(updatePageNumber);
}
}
catch (Exception e)
{
MessageBox.Show(e.Message);
}
finally
{
this.Invoke(new SetCursorDelegate(SetCursor), Cursors.Default);
}
}
private void AddLinkItem(DLISearchItem item)
{
this.listViewSearch.Items.Add(item);
}
