/// <summary>
/// Generate a CSW request string.
/// </summary>
/// <remarks>
/// The CSW request string is built.
/// The request is string is build based on the request xslt.
/// </remarks>
/// <param name="param1">The search criteria</param>
/// <returns>The request string</returns>
public string GenerateCSWGetRecordsRequest(CswSearchCriteria searchCriteria)
{
XmlElement root = null;
if ((getRecordsRequest == null)||!searchCriteria.RefinePreviousFilter)
{
getRecordsRequest = new XmlDocument();
XmlDeclaration declaration = getRecordsRequest.CreateXmlDeclaration("1.0", "UTF-8", null);
getRecordsRequest.AppendChild(declaration);
// Create the root element
root = getRecordsRequest.CreateElement("GetRecords");
getRecordsRequest.AppendChild(root);
}
SetFilterCriteria(getRecordsRequest, searchCriteria);
if (searchCriteria.RefinePreviousFilter)
{
//All And|Or|Not child elements of the GetRecords-root element need to be group in and And element
root = getRecordsRequest.DocumentElement;
//First get rid of childs that will be reset later
XmlNode node = root.SelectSingleNode("StartPosition");
if (node != null ) root.RemoveChild(node);
node = root.SelectSingleNode("MaxRecords");
if (node != null) root.RemoveChild(node);
XmlElement xmlRefineLogicalOperator = getRecordsRequest.CreateElement("And");
while (root.ChildNodes.Count > 0)
{
xmlRefineLogicalOperator.AppendChild(root.FirstChild);
}
root.AppendChild(xmlRefineLogicalOperator);
}
XmlElement xmlElement = getRecordsRequest.CreateElement("StartPosition");
xmlElement.InnerText = searchCriteria.StartPosition.ToString();
root.AppendChild(xmlElement);
xmlElement = getRecordsRequest.CreateElement("MaxRecords");
xmlElement.InnerText = searchCriteria.MaxRecords.ToString();
root.AppendChild(xmlElement);
return TransformRequest(getRecordsRequest);
}
private void SetFilterCriteria(XmlDocument doc, CswSearchCriteria searchCriteria)
{
XmlElement root = doc.DocumentElement;
//The logical operator between the filter properties
XmlElement xmlFilterLogicalOperator = doc.CreateElement(Enum.GetName(typeof(CswSearchCriteria.LogicalOperator), searchCriteria.FilterLogicalOperator));
root.AppendChild(xmlFilterLogicalOperator);
//Regular expression instead of Split, in order to keep word combinations between double quotes
//"Bob the Builder" construction ---> gives 2 matches: '"Bob the Builder"' and 'construction'.
Regex regex = new Regex(@"((""((?<token>.*?)(?<!\\)"")|(?<token>[\S]+))(\s)*)");
MatchCollection matches = regex.Matches(searchCriteria.SearchText);
XmlElement searchTextLogicalOperator=null;
for (int i = 0; i < matches.Count; i++)
{
XmlElement xmlKeyWord = doc.CreateElement("KeyWord");
xmlKeyWord.InnerText = this.XmlEscape(matches[i].Value.Trim().Replace(@"""", String.Empty));
if ((matches.Count > 1)||(searchCriteria.SearchTextLogicalOperator == CswSearchCriteria.LogicalOperator.Not))
{
if (i == 0)
{
searchTextLogicalOperator = doc.CreateElement(Enum.GetName(typeof(CswSearchCriteria.LogicalOperator), searchCriteria.SearchTextLogicalOperator));
xmlFilterLogicalOperator.AppendChild(searchTextLogicalOperator);
}
searchTextLogicalOperator.AppendChild(xmlKeyWord);
}
else
{
xmlFilterLogicalOperator.AppendChild(xmlKeyWord);
}
}
//XmlElement xmlLiveDataMap = doc.CreateElement("LiveDataMap");
//xmlLiveDataMap.InnerText = searchCriteria.LiveDataAndMapOnly.ToString();
//xmlFilterLogicalOperator.AppendChild(xmlLiveDataMap);
XmlElement xmlTypesOfUseLogicalOperator=null;
for (int i = 0; i < searchCriteria.TypesOfUse.Count; i++)
{
XmlElement xmlTypeOfUse = doc.CreateElement("TypeOfUse");
xmlTypeOfUse.InnerText = searchCriteria.TypesOfUse[i];
if (searchCriteria.TypesOfUse.Count > 1)
{
if (i == 0)
{
xmlTypesOfUseLogicalOperator = doc.CreateElement("Or");
xmlFilterLogicalOperator.AppendChild(xmlTypesOfUseLogicalOperator);
}
xmlTypesOfUseLogicalOperator.AppendChild(xmlTypeOfUse);
}
else
{
xmlFilterLogicalOperator.AppendChild(xmlTypeOfUse);
}
}
if (!String.IsNullOrEmpty(searchCriteria.Organisation))
{
XmlElement xmlOrganisation = doc.CreateElement("Organisation");
xmlOrganisation.InnerText = this.XmlEscape(searchCriteria.Organisation.Trim().Replace(@"""", String.Empty));
xmlFilterLogicalOperator.AppendChild(xmlOrganisation);
}
if (searchCriteria.Envelope != null)
{
XmlElement xmlEnvelope = doc.CreateElement("Envelope");
xmlFilterLogicalOperator.AppendChild(xmlEnvelope);
XmlElement xe = doc.CreateElement("MinX");
xe.InnerText=searchCriteria.Envelope.MinX.ToString();
xmlEnvelope.AppendChild(xe);
xe = doc.CreateElement("MinY");
xe.InnerText = searchCriteria.Envelope.MinY.ToString();
xmlEnvelope.AppendChild(xe);
xe = doc.CreateElement("MaxX");
xe.InnerText = searchCriteria.Envelope.MaxX.ToString();
xmlEnvelope.AppendChild(xe);
xe = doc.CreateElement("MaxY");
xe.InnerText = searchCriteria.Envelope.MaxY.ToString();
xmlEnvelope.AppendChild(xe);
}
}
/// <summary>
/// Search CSW catalog with the criteria defined by user
/// </summary>
/// <param name="sender">event sender</param>
/// <param name="e">event args</param>
private void FindButton_Click(object sender, EventArgs e)
{
StringBuilder sb = new StringBuilder();
try
{
// Todo: add more validation. only minimum validation at this point.
if (catalogComboBox.SelectedIndex == -1)
{
ShowErrorMessageBox(StringResources.PleaseSelectACswCatalog);
return;
}
CswCatalog catalog = (CswCatalog)catalogComboBox.SelectedItem;
if (catalog == null) { throw new NullReferenceException(StringResources.CswCatalogIsNull); }
// reset GUI for search results
ResetSearchResultsGUI();
System.Windows.Forms.Cursor.Current = Cursors.WaitCursor;
if (!catalog.IsConnected())
{
string errMsg = "";
try { catalog.Connect(_isWriteLogs);
}
catch (Exception ex) { errMsg = ex.Message; }
if (!catalog.IsConnected())
{
sb.AppendLine("Failed to connect to Catalog");
ShowErrorMessageBox (StringResources.ConnectToCatalogFailed + "\r\n" + errMsg);
return;
}
}
// todo: need paging maganism. update SearchCriteria.StartPoistion
// generate search criteria
CswSearchCriteria searchCriteria = new CswSearchCriteria();
searchCriteria.SearchText = searchPhraseTextBox.Text;
searchCriteria.SearchTextLogicalOperator = (CswSearchCriteria.LogicalOperator)cbSearchTextLO.SelectedIndex;
searchCriteria.FilterLogicalOperator = CswSearchCriteria.LogicalOperator.And;
searchCriteria.Organisation = tbOrganisation.Text;
if (cbDownload.Checked) searchCriteria.TypesOfUse.Add(cbDownload.Text);
if (cbRaadplegen.Checked) searchCriteria.TypesOfUse.Add(cbRaadplegen.Text);
if (cbAchtergrond.Checked) searchCriteria.TypesOfUse.Add(cbAchtergrond.Text);
searchCriteria.StartPosition = 1;
searchCriteria.MaxRecords = (int)maxResultsNumericUpDown.Value;
//searchCriteria.LiveDataAndMapOnly = (liveDataAndMapsOnlyCheckBox.Checked);
searchCriteria.RefinePreviousFilter = ((cbRefine.Checked) && (cbRefine.Enabled));
//if (useCurrentExtentCheckBox.Checked)
//{
// try { searchCriteria.Envelope = CurrentMapViewExtent(); }
// catch (Exception ex)
// {
// String errMsg = StringResources.GetCurrentExtentFailed + "\r\n" +
// ex.Message + "\r\n" + "\r\n" +
// StringResources.UncheckCurrentExtentAndTryAgain;
// sb.AppendLine(errMsg);
// ShowErrorMessageBox(errMsg);
// return;
// }
//}
//else
//{
searchCriteria.Envelope = null;
//}
// search
if (_searchRequest == null) { _searchRequest = new CswSearchRequest(_isWriteLogs); }
_searchRequest.Catalog = catalog;
_searchRequest.Criteria = searchCriteria;
_searchRequest.Search();
ShowSearchResults(sb);
}
catch (Exception ex)
{
sb.AppendLine(ex.Message);
ShowErrorMessageBox (ex.Message);
}
finally
{
if (_isWriteLogs)
Utils.writeFile(sb.ToString());
System.Windows.Forms.Cursor.Current = Cursors.Default;
}
}
