public Hashtable GetDataSummary(string layerName, string summaryFields, string dissolveField, bool selectedOnly = false)
{
Hashtable result = new Hashtable();
ILayer layer = this._getLayerByName(layerName);
if (layer != null && layer is IFeatureLayer)
{
ITable inputTable = (ITable)layer;
IWorkspaceName wsName = ((IDataset)(this._tempWorkspace)).FullName as IWorkspaceName;
/*
ShapefileWorkspaceFactoryClass tempWSFactory = new ShapefileWorkspaceFactoryClass();
IWorkspace tempWS = tempWSFactory.OpenFromFile(System.IO.Path.GetTempPath(), 0);
IWorkspaceName wsName = ((IDataset)(tempWS)).FullName as IWorkspaceName;
*/
TableNameClass outputName = new TableNameClass();
outputName.Name = layerName + "_summary_" + DateTime.Now.ToString("MM_dd_yy_H_mm_ss");
outputName.WorkspaceName = wsName;
if (inputTable.FindField(dissolveField) > 0)
{
BasicGeoprocessorClass basicGeopro = new BasicGeoprocessorClass();
ITable resultTable = basicGeopro.Dissolve(inputTable, selectedOnly, dissolveField, summaryFields, outputName);
result.Add("workspace", this._tempWorkspace.PathName);
result.Add("table", outputName.Name);
// Create a data graph.
IDataGraphT dataGraphT = new DataGraphTClass();
// Add the graph series.
ISeriesProperties seriesProps = dataGraphT.AddSeries("bar:vertical");
seriesProps.SourceData = resultTable;
seriesProps.SetField(0, resultTable.Fields.get_Field(1).Name);
seriesProps.SetField(1, resultTable.Fields.get_Field(2).Name);
seriesProps.LabelField = resultTable.Fields.get_Field(1).Name;
// Set titles.
dataGraphT.GeneralProperties.Title = "Bar Chart";
dataGraphT.AxisProperties[1].Title = dissolveField;
// Update the data graph.
dataGraphT.Update(null);
// Export the graph to file (the format depends on the file extension).
string tempDir = System.IO.Path.GetTempPath();
string outImageFile = System.IO.Path.Combine(tempDir, outputName.Name + ".bmp");
if (System.IO.File.Exists(outImageFile))
{
System.IO.File.Delete(outImageFile);
}
dataGraphT.ExportToFile(outImageFile);
result.Add("graph", outImageFile);
}
}
return result;
}
public Hashtable GetFieldStatistics(string layerName, string fieldName, bool selectedOnly=false)
{
Hashtable result = new Hashtable();
ILayer layer = this._getLayerByName(layerName);
if (layer != null && layer is IFeatureLayer)
{
ICursor cursor;
if (selectedOnly == true)
{
((IFeatureSelection)layer).SelectionSet.Search(null, false, out cursor);
}
else
{
IFeatureLayer featureLayer = layer as IFeatureLayer;
cursor = (ICursor)featureLayer.FeatureClass.Search(null, false);
}
result.Add("layer_name", layerName);
result.Add("field_name", fieldName);
IDataStatistics dataStatistics = new DataStatisticsClass();
dataStatistics.Cursor = cursor;
dataStatistics.Field = fieldName;
IStatisticsResults statResults = dataStatistics.Statistics;
Hashtable stats = new Hashtable();
stats.Add("count", statResults.Count);
stats.Add("sum", statResults.Sum);
stats.Add("mean", statResults.Mean);
stats.Add("std", statResults.StandardDeviation);
stats.Add("minimum", statResults.Minimum);
stats.Add("maximum", statResults.Maximum);
result.Add("statistics", stats);
// Create a data graph.
IDataGraphT dataGraphT = new DataGraphTClass();
// Add the histogram series.
ISeriesProperties seriesProps = dataGraphT.AddSeries("bar:histogram");
seriesProps.SourceData = (IFeatureLayer)layer; //((IAttributeTable)layer).AttributeTable;
seriesProps.SetField(0, fieldName);
// Set the histogram properties.
IHistogramSeriesProperties histogramSeriesProps = (IHistogramSeriesProperties)seriesProps;
histogramSeriesProps.BinCount = 20;
if (selectedOnly == true)
{
dataGraphT.UseSelectedSet = true;
dataGraphT.HighlightSelection = false;
//seriesProps.SourceData = ((IFeatureSelection)layer).SelectionSet;
}
else
{
dataGraphT.UseSelectedSet = true;
dataGraphT.HighlightSelection = true;
//seriesProps.SourceData = ((IFeatureLayer)layer).FeatureClass;
}
// Set titles.
dataGraphT.GeneralProperties.Title = "Histogram of " + fieldName;
dataGraphT.AxisProperties[1].Title = "COUNT";
// Update the data graph.
dataGraphT.Update(null);
// Export the graph to file (the format depends on the file extension).
string tempDir = System.IO.Path.GetTempPath();
string outImageFile = System.IO.Path.Combine(tempDir, layerName+ "_" + fieldName + DateTime.Now.ToString("_MM_dd_yy_H_mm_ss_") + "_histogram.bmp");
if (System.IO.File.Exists(outImageFile))
{
System.IO.File.Delete(outImageFile);
}
dataGraphT.ExportToFile(outImageFile);
result.Add("histogram", outImageFile);
}
return result;
}
