private void doFilteredSearch2()
{
List <string> searchTerms = getSearchTerms();
List <string> includeTerms = null;
List <string> excludeTerms = null;
if (checkBoxFilterGroups.Checked)
{
if (radioButtonInclude.Checked && radioButtonExclude.Checked == false)
{
includeTerms = searchTerms;
}
else if (radioButtonExclude.Checked && radioButtonInclude.Checked == false)
{
excludeTerms = searchTerms;
}
else
{
MessageBox.Show("Unable to complete search. Please try again.");
}
addSearchToComboBox(searchTerms);
}
newsGroups = Utils.GetNewsGroups(server, includeTerms, excludeTerms);
}
//good test server: forums.embarcadero.com.
public static NewsgroupCollection GetNewsGroups(string server, List <string> includeList, List <string> excludeList)
{
NewsConnection connection = new NewsConnection();
connection.Connect(server);
NewsgroupCollection groups = connection.GetNewsgroups(includeList, excludeList);
connection.Disconnect();
return(groups);
}
private void NewsReaderForm_Load(object sender, EventArgs e)
{
//server
server = "forums.embarcadero.com";
textBoxServerURL.Text = server;
textBoxServerURL.Select();
//listboxes
newsGroups = new NewsgroupCollection();
listBoxNewsgroups.DisplayMember = "Name";
listBoxArticleHeaders.DisplayMember = "Subject";
//filtering
checkBoxFilterGroups.Checked = false;
deactivateFiltering();
radioButtonInclude.Checked = true;
checkBoxFilterArticles.Checked = true;
textBoxNumArticles.Text = "100";
}
private bool downloadGroups()
{
string server = txtServer.Text;
// add an item to the group filter list
addGroupFilters();
string[] filterList = cboGroupFilters.Text.Split(' ');
try
{
// Temporary connection to the server.
NewsConnection connection = new NewsConnection();
connection.Connect(server);
if (chkFilterGroups.Checked)
{
if (radInclude.Checked)
{
groups = connection.GetNewsgroups(filterList, null);
}
else
{
groups = connection.GetNewsgroups(null, filterList);
}
}
else
{
groups = connection.GetNewsgroups();
}
connection.Disconnect();
return(true);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Download Articles", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
return(false);
}
}
private void doFilteredSearch()
{
List <string> includeTerms = null;
List <string> excludeTerms = null;
if (checkBoxFilterGroups.Checked)
{
includeTerms = getIncludeTerms();
excludeTerms = getExcludeTerms();
}
newsGroups = Utils.GetNewsGroups(server, includeTerms, excludeTerms);
///this is corny, need to simplify
if (includeTerms != null)
{
addSearchToComboBox(includeTerms);
}
else if (excludeTerms != null)
{
addSearchToComboBox(excludeTerms);
}
}
private bool downloadGroups()
{
string server = txtServer.Text;
// add an item to the group filter list
addGroupFilters();
string[] filterList = cboGroupFilters.Text.Split(' ');
try
{
// Temporary connection to the server.
NewsConnection connection = new NewsConnection();
connection.Connect(server);
if (chkFilterGroups.Checked)
{
if (radInclude.Checked)
{
groups = connection.GetNewsgroups(filterList, null);
}
else
{
groups = connection.GetNewsgroups(null, filterList);
}
}
else
{
groups = connection.GetNewsgroups();
}
connection.Disconnect();
return true;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Download Articles", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
return false;
}
}
/// <summary>
/// If includeList is not null then this method downloads the newsgroups
/// that have any of the words in includeList in any part of the newsgroup name. If excludeList
/// is not null then this method downloads the newsgroups that do not have any of the words in
/// the excludeList in any part of the newsgroup name. If both parameters are null then all newsgroups
/// are downloaded; if both are not null then an assertion is raised.
/// </summary>
/// <param name="includeList">A collection of strings to search for in the newsgroup names. If any
/// of the words are in any part of the newsgroup name then that newsgroup is downloaded. This value
/// must be null if excludeList is not null.</param>
/// <param name="excludeList">A collection of strings to search for in the newsgroup names. If any
/// of the words are in any part of the newsgroup name then that newsgroup is not downloaded. This
/// value must be null if includeList is not null.</param>
/// <returns>A collection of Newsgroup objects that match the filter criteria given by includeList
/// or by excludeList. Each object's Articles property will be null. Use GetArticleHeaders to populate
/// these objects with Article objects.</returns>
public NewsgroupCollection GetNewsgroups(IList<string> includeList, IList<string> excludeList)
{
string message;
string response;
NewsgroupCollection groups = new NewsgroupCollection();
message = "LIST\r\n";
Write(message);
response = Response();
if (response.Substring(0, 3) != "215")
{
throw new NntpException(response);
}
// Suck next line of data from the socket.
response = Response();
while (response != ".\r\n" && response != ".\n")
{
// The response line should take the format:
// group last first p
//
// groupName - name of the group
// last - sequence number of the last message
// first - sequence number of the first message
// p - boolean value equal to y or n indicating whether or not posting is allowed
// (note: this is independent of whether the particular news server allows
// posting; some groups are moderated and therefore can only have posting by
// the moderator).
string[] values = response.Split(' ');
// I don't think this would happen, but...
if (values.Length != 4)
{
throw new NntpException("LIST command returned unexpected results.");
}
string groupName = values[0];
int last = int.Parse(values[1]);
int first = int.Parse(values[2]);
bool postingAllowed = values[3].Trim().ToLower() == "y";
Newsgroup newGroup;
if (includeList != null)
{
// An include list has been supplied. Add this group only if the group name
// contains one of the include list strings.
foreach (string includeString in includeList)
{
if (groupName.Contains(includeString))
{
newGroup = new Newsgroup(groupName, postingAllowed, first, last);
groups.Add(newGroup);
break;
}
}
}
else if (excludeList != null)
{
// An exclude list has been supplied. Add this group only if the group name
// contains *none* of the include list strings.
bool contains = false;
foreach (string excludeString in excludeList)
{
if (groupName.Contains(excludeString))
{
contains = true;
break;
}
}
if (!contains)
{
newGroup = new Newsgroup(groupName, postingAllowed, first, last);
groups.Add(newGroup);
}
}
else
{
// Neither include nor exclude list has been supplied. Add this group.
newGroup = new Newsgroup(groupName, postingAllowed, first, last);
groups.Add(newGroup);
}
// Pump the loop.
response = Response();
}
return groups;
}
