// 公共方法
void FeatureLayerVisualize(IConnectionInfo ci, bool needfly, string sourceName,
ITextRender textRender, IGeometryRender geoRender)
{
IDataSourceFactory dsFactory = null;
IDataSource ds = null;
IFeatureDataSet dataset = null;
try
{
dsFactory = new DataSourceFactory();
ds = dsFactory.OpenDataSource(ci);
string[] setnames = (string[])ds.GetFeatureDatasetNames();
if (setnames.Length == 0)
{
return;
}
dataset = ds.OpenFeatureDataset(setnames[0]);
crs = dataset.SpatialReference;
string[] fcnames = (string[])dataset.GetNamesByType(gviDataSetType.gviDataSetFeatureClassTable);
if (fcnames.Length == 0)
{
return;
}
fcMap = new Hashtable(fcnames.Length);
foreach (string name in fcnames)
{
IFeatureClass fc = dataset.OpenFeatureClass(name);
// 找到空间列字段
List <string> geoNames = new List <string>();
IFieldInfoCollection fieldinfos = fc.GetFields();
for (int i = 0; i < fieldinfos.Count; i++)
{
IFieldInfo fieldinfo = fieldinfos.Get(i);
if (null == fieldinfo)
{
continue;
}
IGeometryDef geometryDef = fieldinfo.GeometryDef;
if (null == geometryDef)
{
continue;
}
geoNames.Add(fieldinfo.Name);
}
fcMap.Add(fc, geoNames);
}
// CreateFeautureLayer
bool hasfly = !needfly;
foreach (IFeatureClass fcInMap in fcMap.Keys)
{
List <string> geoNames = (List <string>)fcMap[fcInMap];
foreach (string geoName in geoNames)
{
IFeatureLayer featureLayer = this.axRenderControl1.ObjectManager.CreateFeatureLayer(
fcInMap, geoName, textRender, geoRender, rootId);
// 添加节点到界面控件上
object[] registeredFields = GetRegisteredRenderIndexFields(fcInMap);
myListNode item = new myListNode(string.Format("{0}_{1}_{2}", sourceName, fcInMap.Name, featureLayer.MaxVisibleDistance.ToString()), featureLayer, registeredFields);
item.Checked = true;
listView1.Items.Add(item);
layerFcMap.Add(featureLayer, fcInMap);
IFieldInfoCollection fieldinfos = fcInMap.GetFields();
IFieldInfo fieldinfo = fieldinfos.Get(fieldinfos.IndexOf(geoName));
IGeometryDef geometryDef = fieldinfo.GeometryDef;
IEnvelope env = geometryDef.Envelope;
layerEnvelopeMap.Add(featureLayer, env);
if (env == null || (env.MaxX == 0.0 && env.MaxY == 0.0 && env.MaxZ == 0.0 &&
env.MinX == 0.0 && env.MinY == 0.0 && env.MinZ == 0.0))
{
continue;
}
// 相机飞入
if (!hasfly)
{
angle.Set(0, -20, 0);
IPoint pos = (new GeometryFactory()).CreatePoint(gviVertexAttribute.gviVertexAttributeZ);
pos.SpatialCRS = crs;
pos.Position = env.Center;
this.axRenderControl1.Camera.LookAt2(pos, 1000, angle);
}
hasfly = true;
}
}
}
catch (COMException ex)
{
System.Diagnostics.Trace.WriteLine(ex.Message);
return;
}
catch (System.Exception e)
{
System.Diagnostics.Trace.WriteLine(e.Message);
return;
}
finally
{
if (ds != null)
{
ds.Dispose();
ds = null;
}
if (dataset != null)
{
dataset.Dispose();
dataset = null;
}
//if (fc != null)
//{
// fc.Dispose();
// fc = null;
//}
}
}