private void btnAddRule_Click(object sender, EventArgs e)
{
switch (_style.StyleType)
{
case StyleType.Point:
{
var rule = _editedLayer.CreateDefaultPointRule();
((IPointVectorStyle)_style).AddRule(rule);
var model = new PointRuleModel(rule, _style.RuleCount - 1);
_rules.Add(model);
}
break;
case StyleType.Line:
{
var rule = _editedLayer.CreateDefaultLineRule();
((ILineVectorStyle)_style).AddRule(rule);
var model = new LineRuleModel(rule, _style.RuleCount - 1);
_rules.Add(model);
}
break;
case StyleType.Area:
{
var rule = _editedLayer.CreateDefaultAreaRule();
((IAreaVectorStyle)_style).AddRule(rule);
var model = new AreaRuleModel(rule, _style.RuleCount - 1);
_rules.Add(model);
}
break;
case StyleType.Composite:
{
var rule = _editedLayer.CreateDefaultCompositeRule();
((ICompositeTypeStyle)_style).AddCompositeRule(rule);
var model = new CompositeRuleModel(rule, _style.RuleCount - 1);
_rules.Add(model);
}
break;
}
}
private void CreateDistrictsLayer(IServerConnection conn, string resId, string layerId)
{
//We use the Utility class to create our layer. You can also use ObjectFactory, but
//that requires explicitly specifying the resource version. Using Utility will pick
//the latest supported version
ILayerDefinition ldf = Utility.CreateDefaultLayer(conn, LayerType.Vector);
IVectorLayerDefinition vldf = (IVectorLayerDefinition)ldf.SubLayer;
//Set feature source
vldf.ResourceId = resId;
//Set the feature class
//
//Note: In versions of the Sheboygan Dataset before 2.6, this used to be
//
// - Feature Class: SDF_2_Schema:VotingDistricts
// - Identity Property: Autogenerated_SDF_ID
// - Geometry Property: Data
string featureClass = "Default:VotingDistricts";
string idProp = "FeatId";
string geometryProp = "Geometry";
vldf.FeatureName = featureClass;
//Set the designated geometry
vldf.Geometry = geometryProp;
//Get the first vector scale range. This will have been created for us and is 0 to infinity
IVectorScaleRange vsr = vldf.GetScaleRangeAt(0);
//What are we doing here? We're checking if this vector scale range is a
//IVectorScaleRange2 instance. If it is, it means this layer definition
//has a composite style attached, which takes precedence over point/area/line
//styles. We don't want this, so this removes the composite styles if they
//exist.
IVectorScaleRange2 vsr2 = vsr as IVectorScaleRange2;
if (vsr2 != null)
{
vsr2.CompositeStyle = null;
}
//Get the area style
IAreaVectorStyle astyle = vsr.AreaStyle;
//Remove the default rule
astyle.RemoveAllRules();
IFeatureService featSvc = conn.FeatureService;
//Generate a random color for each distinct feature id
//Perform a distinct value query
IReader valueReader = featSvc.AggregateQueryFeatureSource(resId, featureClass, null, new NameValueCollection()
{
{ "Value", "UNIQUE(" + idProp + ")" } //UNIQUE() is the aggregate function that collects all distinct values of FeatId
});
while (valueReader.ReadNext())
{
//The parent Layer Definition provides all the methods needed to create the necessary child elements
IAreaRule rule = ldf.CreateDefaultAreaRule();
//Set the filter for this rule
rule.Filter = idProp + " = " + valueReader["Value"].ToString();
//IReader allows object access by name in case you don't care to determine the data type
rule.LegendLabel = valueReader["Value"].ToString();
//Assign a random color fill
rule.AreaSymbolization2D.Fill.ForegroundColor = Utility.SerializeHTMLColor(RandomColor(), true);
//Add this rule
astyle.AddRule(rule);
}
valueReader.Close();
//Now save it
conn.ResourceService.SaveResourceAs(ldf, layerId);
}
