private void button1_Click(object sender, EventArgs e)
{
try
{
var fact = new MgdServiceFactory();
MgFeatureService featSvc = (MgdFeatureService)fact.CreateService(MgServiceType.FeatureService);
MgFeatureAggregateOptions query = new MgFeatureAggregateOptions();
string[] propNames = txtProps.Text.Split(',');
foreach (var p in propNames)
{
if (string.IsNullOrEmpty(p))
{
continue;
}
query.AddFeatureProperty(p);
}
foreach (Pair p in lstComputed.Items)
{
query.AddComputedProperty(p.Name, p.Expr);
}
if (!string.IsNullOrEmpty(txtFilter.Text.Trim()))
{
query.SetFilter(txtFilter.Text.Trim());
}
query.SelectDistinct(chkDistinct.Checked);
MgResourceIdentifier fsId = new MgResourceIdentifier(txtFeatureSource.Text);
MgDataReader reader = featSvc.SelectAggregate(fsId, txtClass.Text, query);
new ReaderResponseDialog(reader).ShowDialog();
}
catch (MgException ex)
{
MessageBox.Show(ex.ToString(), "Error from MapGuide");
}
}
private string ApplyTheme(ThemeParams themeParams)
{
var provider = _viewer.GetProvider();
var map = _viewer.GetMap();
var layers = map.GetLayers();
MgResourceService resourceService = (MgResourceService)provider.CreateService(MgServiceType.ResourceService);
MgFeatureService featureService = (MgFeatureService)provider.CreateService(MgServiceType.FeatureService);
MgResourceIdentifier resId = new MgResourceIdentifier(themeParams.layer.GetFeatureSourceId());
MgResourceIdentifier layerDefResId = themeParams.layer.GetLayerDefinition();
MgByteReader byteReader = resourceService.GetResourceContent(layerDefResId);
// Load the Layer Definition and Navigate to the specified <VectorScaleRange>
XmlDocument doc = new XmlDocument();
String xmlLayerDef = byteReader.ToString();
doc.LoadXml(xmlLayerDef);
XmlNodeList nodeList = doc.GetElementsByTagName("VectorScaleRange"); //NOXLATE
XmlElement vectorScaleRangecElement = (XmlElement)nodeList.Item(themeParams.scaleRangeIndex);
XmlElement areaTypeStyle = (XmlElement)vectorScaleRangecElement.GetElementsByTagName("AreaTypeStyle").Item(0); //NOXLATE
// Remove any existing <AreaRule> elements.
XmlNodeList areaRuleList = areaTypeStyle.GetElementsByTagName("AreaRule"); //NOXLATE
int count = areaRuleList.Count;
for (int i = 0; i < count; i++)
{
//The areaRuleList shrinks as we remove items, so always
//remove the first item (don't use the index i)
areaTypeStyle.RemoveChild(areaRuleList.Item(0));
}
// Now create the new <AreaRule> elements.
String areaRuleTemplate = Properties.Resources.AreaRuleTemplate;
MgFeatureAggregateOptions aggregateOptions = new MgFeatureAggregateOptions();
String value = null;
String filterText = null;
String areaRuleXML = null;
XmlDocument areaDoc = null;
XmlNode areaNode = null;
double portion = 0.0;
double increment = (themeParams.numRules > 1) ? 1.0 / (themeParams.numRules - 1) : 1.0;
if (THEME_INDIVIDUAL == themeParams.distro)
{
aggregateOptions.AddComputedProperty("THEME_VALUE", "UNIQUE(\"" + themeParams.property.Name + "\")"); //NOXLATE
MgDataReader dataReader = featureService.SelectAggregate(resId, themeParams.layer.GetFeatureClassName(), aggregateOptions);
while (dataReader.ReadNext())
{
value = Util.GetFeaturePropertyValue(dataReader, "THEME_VALUE"); //NOXLATE
filterText = """ + themeParams.property.Name + "" = "; //NOXLATE
if (themeParams.property.DataType == MgPropertyType.String)
{
filterText = filterText + "'" + value + "'"; //NOXLATE
}
else
{
filterText = filterText + value;
}
areaRuleXML = String.Format(areaRuleTemplate,
themeParams.property.Name + ":" + value, //NOXLATE
filterText,
Util.InterpolateColor(portion, themeParams.fillFrom, themeParams.fillTo, themeParams.fillTrans),
Util.InterpolateColor(portion, themeParams.borderFrom, themeParams.borderTo, 0));
areaDoc = new XmlDocument();
areaDoc.LoadXml(areaRuleXML);
areaNode = doc.ImportNode(areaDoc.DocumentElement, true);
areaTypeStyle.AppendChild(areaNode);
portion = portion + increment;
}
dataReader.Close();
}
else
{
var values = new List <string>();
var expr = themeParams.distro + "(\"" + themeParams.property.Name + "\"," + themeParams.numRules + "," + themeParams.minValue + "," + themeParams.maxValue + ")"; //NOXLATE
aggregateOptions.AddComputedProperty("THEME_VALUE", expr); //NOXLATE
MgDataReader dataReader = featureService.SelectAggregate(resId, themeParams.layer.GetFeatureClassName(), aggregateOptions);
while (dataReader.ReadNext())
{
value = Util.GetFeaturePropertyValue(dataReader, "THEME_VALUE"); //NOXLATE
values.Add(value);
}
dataReader.Close();
for (int i = 0; i < values.Count - 1; i++)
{
filterText = """ + themeParams.property.Name + "" >= " + values[i] + " AND "" + themeParams.property.Name; //NOXLATE
if (i == values.Count - 1)
{
filterText = filterText + "" <= " + values[i + 1]; //NOXLATE
}
else
{
filterText = filterText + "" < " + values[i + 1]; //NOXLATE
}
areaRuleXML = String.Format(areaRuleTemplate,
themeParams.property.Name + ":" + values[i] + " - " + values[i + 1], //NOXLATE
filterText,
Util.InterpolateColor(portion, themeParams.fillFrom, themeParams.fillTo, themeParams.fillTrans),
Util.InterpolateColor(portion, themeParams.borderFrom, themeParams.borderTo, 0));
areaDoc = new XmlDocument();
areaDoc.LoadXml(areaRuleXML);
areaNode = doc.ImportNode(areaDoc.DocumentElement, true);
areaTypeStyle.AppendChild(areaNode);
portion = portion + increment;
}
}
// Now save our new layer definition to the session and add it to the map.
String xmlString = doc.DocumentElement.OuterXml;
String uniqueName = Util.MakeUniqueLayerName(map, themeParams.layer.Name, themeParams.themeName);
String legendLabel = themeParams.layer.GetLegendLabel();
if (!string.IsNullOrEmpty(themeParams.themeName))
{
legendLabel = legendLabel + " (" + themeParams.themeName + ")"; //NOXLATE
}
MgResourceIdentifier layerResId = new MgResourceIdentifier("Session:" + _sessionId + "//" + uniqueName + ".LayerDefinition"); //NOXLATE
resourceService.SetResource(layerResId, new MgByteReader(xmlString, "text/xml"), null); //NOXLATE
var newLayer = provider.CreateLayer(layerResId);
newLayer.SetName(uniqueName);
newLayer.SetLegendLabel(legendLabel);
newLayer.SetDisplayInLegend(themeParams.layer.GetDisplayInLegend());
newLayer.SetVisible(true);
newLayer.SetSelectable(themeParams.layer.GetSelectable());
//HACK: This has to be true otherwise owner-drawn nodes will not display its children (the theme rules)
provider.SetLayerExpandInLegend(newLayer, true);
layers.Insert(layers.IndexOf(themeParams.layer), newLayer);
//map.Save(resourceService);
return(uniqueName);
}