public static void Execute(IFeatureClass featureClass, String indexName, String nameOfField)
{
// Ensure the feature class contains the specified field.
int fieldIndex = featureClass.FindField(nameOfField);
if (fieldIndex == -1)
{
throw new ArgumentException("The specified field does not exist in the feature class.");
}
// Get the specified field from the feature class.
IFields featureClassFields = featureClass.Fields;
IField field = featureClassFields.get_Field(fieldIndex);
// Create a fields collection and add the specified field to it.
IFields fields = new FieldsClass();
IFieldsEdit fieldsEdit = (IFieldsEdit)fields;
fieldsEdit.FieldCount_2 = 1;
fieldsEdit.set_Field(0, field);
// Create an index and cast to the IIndexEdit interface.
IIndex index = new IndexClass();
IIndexEdit indexEdit = (IIndexEdit)index;
// Set the index's properties, including the associated fields.
indexEdit.Fields_2 = fields;
indexEdit.IsAscending_2 = false;
indexEdit.IsUnique_2 = false;
indexEdit.Name_2 = indexName;
// Add the index to the feature class.
featureClass.AddIndex(index);
}
public static void createSpatialIndex(IFeatureClass fc, double gridOneSize = 0.0, double gridTwoSize = 0.0, double gridThreeSize = 0.0)
{
String shapeFieldName = fc.ShapeFieldName;
// Clone the shape field from the feature class.
int shapeFieldIndex = fc.FindField(shapeFieldName);
IFields fields = fc.Fields;
IField sourceField = fields.get_Field(shapeFieldIndex);
IClone sourceFieldClone = (IClone)sourceField;
IClone targetFieldClone = sourceFieldClone.Clone();
IField targetField = (IField)targetFieldClone;
// Open the geometry definition from the cloned field and modify it.
IGeometryDef geometryDef = targetField.GeometryDef;
IGeometryDefEdit geometryDefEdit = (IGeometryDefEdit)geometryDef;
if (gridTwoSize > 0.0)
{
geometryDefEdit.GridCount_2 = 1;
geometryDefEdit.set_GridSize(0, gridOneSize);
}
if (gridTwoSize > 0.0)
{
geometryDefEdit.GridCount_2 = 2;
geometryDefEdit.set_GridSize(1, gridTwoSize);
}
if (gridThreeSize > 0.0)
{
geometryDefEdit.GridCount_2 = 3;
geometryDefEdit.set_GridSize(2, gridThreeSize);
}
// Create a spatial index and set the required attributes.
IIndex newIndex = new IndexClass();
IIndexEdit newIndexEdit = (IIndexEdit)newIndex;
newIndexEdit.Name_2 = shapeFieldName + "_Indx";
// Create a fields collection and assign it to the new index.
IFields newIndexFields = new FieldsClass();
IFieldsEdit newIndexFieldsEdit = (IFieldsEdit)newIndexFields;
newIndexFieldsEdit.AddField(targetField);
newIndexEdit.Fields_2 = newIndexFields;
// Add the spatial index back into the feature class.
fc.AddIndex(newIndex);
}
/// <summary>
/// 重建要素类空间索引
/// </summary>
/// <param name="pFeatureClass"></param>
/// <param name="gridOneSize"></param>
/// <param name="gridTwoSize"></param>
/// <param name="gridThreeSize"></param>
/// <returns></returns>
public bool RebuildSpatialIndex(IFeatureClass pFeatureClass, Double gridOneSize = 0, Double gridTwoSize = 0, Double gridThreeSize = 0)
{
ISchemaLock pSchemaLock = pFeatureClass as ISchemaLock;
try
{
pSchemaLock.ChangeSchemaLock(esriSchemaLock.esriExclusiveSchemaLock);
// Get an enumerator for indexes based on the shape field.
IIndexes indexes = pFeatureClass.Indexes;
String shapeFieldName = pFeatureClass.ShapeFieldName;
IEnumIndex enumIndex = indexes.FindIndexesByFieldName(shapeFieldName);
enumIndex.Reset();
// Get the index based on the shape field (should only be one) and delete it.
IIndex index = enumIndex.Next();
if (index != null)
{
pFeatureClass.DeleteIndex(index);
}
// Clone the shape field from the feature class.
int shapeFieldIndex = pFeatureClass.FindField(shapeFieldName);
IFields fields = pFeatureClass.Fields;
IField sourceField = fields.get_Field(shapeFieldIndex);
IClone sourceFieldClone = (IClone)sourceField;
IClone targetFieldClone = sourceFieldClone.Clone();
IField targetField = (IField)targetFieldClone;
// Open the geometry definition from the cloned field and modify it.
IGeometryDef geometryDef = targetField.GeometryDef;
IGeometryDefEdit geometryDefEdit = (IGeometryDefEdit)geometryDef;
geometryDefEdit.GridCount_2 = 3;
geometryDefEdit.set_GridSize(0, gridOneSize);
geometryDefEdit.set_GridSize(1, gridTwoSize);
geometryDefEdit.set_GridSize(2, gridThreeSize);
// Create a spatial index and set the required attributes.
IIndex newIndex = new Index();
IIndexEdit newIndexEdit = (IIndexEdit)newIndex;
newIndexEdit.Name_2 = String.Concat(shapeFieldName, "_Index");
newIndexEdit.IsAscending_2 = true;
newIndexEdit.IsUnique_2 = false;
// Create a fields collection and assign it to the new index.
IFields newIndexFields = new Fields();
IFieldsEdit newIndexFieldsEdit = (IFieldsEdit)newIndexFields;
newIndexFieldsEdit.AddField(targetField);
newIndexEdit.Fields_2 = newIndexFields;
// Add the spatial index back into the feature class.
pFeatureClass.AddIndex(newIndex);
return(true);
}
catch
{
return(false);
}
finally
{
pSchemaLock.ChangeSchemaLock(esriSchemaLock.esriSharedSchemaLock);
}
}
/// <summary>
/// 初始化数据
/// </summary>
public void InitData(object progress1)
{
ProgressBar progress = (ProgressBar)progress1;
//耗时巨大的代码
// MainForm.baseData.InitData(progressBar1);
//////////////////////////////////////////////////////////////////////////
//建立分区索引
IEnumIndex pEnumIndex = zoneLCA_FC.Indexes.FindIndexesByFieldName(zidField);
IIndex pTemIndex = pEnumIndex.Next();
if (pTemIndex == null)
{
IIndex pIndex = new IndexClass();
IIndexEdit pIndexEdit = pIndex as IIndexEdit;
IFields pFields = new FieldsClass();
IFieldsEdit pFieldsEdit = pFields as IFieldsEdit;
int zidindex = zoneLCA_FC.Fields.FindField(zidField);
IField pField = zoneLCA_FC.Fields.Field[zidindex];
pFieldsEdit.FieldCount_2 = 1;
pFieldsEdit.set_Field(0, pField);
pIndexEdit.Fields_2 = pFields;
pIndexEdit.Name_2 = zidField;
pIndexEdit.IsAscending_2 = true;
zoneLCA_FC.AddIndex(pIndex);
}
//建立分类索引
IEnumIndex pEnumIndex1 = zoneLCA_FC.Indexes.FindIndexesByFieldName(codeField);
IIndex pTemIndex1 = pEnumIndex1.Next();
if (pTemIndex == null)
{
IIndex pIndex = new IndexClass();
IIndexEdit pIndexEdit = pIndex as IIndexEdit;
IFields pFields = new FieldsClass();
IFieldsEdit pFieldsEdit = pFields as IFieldsEdit;
int codeindex = zoneLCA_FC.Fields.FindField(codeField);
IField pField = zoneLCA_FC.Fields.Field[codeindex];
pFieldsEdit.FieldCount_2 = 1;
pFieldsEdit.set_Field(0, pField);
pIndexEdit.Fields_2 = pFields;
pIndexEdit.Name_2 = codeField;
pIndexEdit.IsAscending_2 = true;
zoneLCA_FC.AddIndex(pIndex);
}
areaIndex = zoneLCA_FC.FindField("Shape_Area");
perimeterIndex = zoneLCA_FC.FindField("Shape_Length");
if (zone_FC != null)
{
areaIndex_zone = zone_FC.FindField("Shape_Area");
perimeterIndex_zone = zone_FC.FindField("Shape_Length");
}
codeIndex = zoneLCA_FC.FindField(codeField);
Utilities.Common.SetProgress(progress);
IQueryDef pQueryDef;
IRow pRow;
ICursor pCursor;
IWorkspace pWorkspace;
IFeatureWorkspace pFeatureWorkspace;
IDataset pDataset;
pDataset = zoneLCA_FC as IDataset;
pWorkspace = pDataset.Workspace;
pFeatureWorkspace = pDataset.Workspace as IFeatureWorkspace;
pQueryDef = pFeatureWorkspace.CreateQueryDef();
//////////////////////////////////////////////////////////////////////////
//添加分区唯一值
pQueryDef.SubFields = "DISTINCT(" + zidField + ")";
pQueryDef.Tables = pDataset.Name;
pCursor = pQueryDef.Evaluate();
pRow = pCursor.NextRow();
while (pRow != null)
{
object obj = pRow.get_Value(0);
zoneValue.Add(obj.ToString());
pRow = pCursor.NextRow();
if (progress.Value < progress.Maximum)
{
progress.Value++;
}
}
//////////////////////////////////////////////////////////////////////////
//添加 分类唯一值
pQueryDef.SubFields = "DISTINCT(" + codeField + ")";
pQueryDef.Tables = pDataset.Name;
pCursor = pQueryDef.Evaluate();
pRow = pCursor.NextRow();
while (pRow != null)
{
object obj = pRow.get_Value(0);
ccValue.Add(obj.ToString());
pRow = pCursor.NextRow();
if (progress.Value < progress.Maximum)
{
progress.Value++;
}
}
if (zone_FC != null)
{
string objectFiled = "";
objectFiled = zone_FC.Fields.Field[0].Name;
pQueryDef.SubFields = (zone_FC as IDataset).Name + "." + objectFiled;
//pQueryDef.SubFields = pDataset.Name + "." + zidField + "," + (zone_FC as IDataset).Name + "." + zidField + "," + (zone_FC as IDataset).Name + ".OBJECTID";
pQueryDef.Tables = (zone_FC as IDataset).Name;
for (int i = 0; i < zoneValue.Count; i++)
{
pQueryDef.WhereClause = zidField + " = " + "'" + zoneValue[i] + "'";
pCursor = pQueryDef.Evaluate();
pRow = pCursor.NextRow();
while (pRow != null)
{
object obj1 = pRow.get_Value(0);
// zoneValue.Add(obj.ToString());
zoneObjectID.Add((int)obj1);
pRow = pCursor.NextRow();
if (progress.Value < progress.Maximum)
{
progress.Value++;
}
}
}
}
string objectFiled1 = "";
objectFiled1 = zoneLCA_FC.Fields.Field[0].Name;
/////////////////////////
//1
pQueryDef.SubFields = objectFiled1 + ",Shape_Area";
pQueryDef.Tables = pDataset.Name;
for (int i = 0; i < zoneValue.Count; i++)
{
double area = 0.0;
pQueryDef.WhereClause = zidField + "=\'" + zoneValue[i] + "\'";
pCursor = pQueryDef.Evaluate();
pRow = pCursor.NextRow();
List <int> pids = new List <int>();
while (pRow != null)
{
area += (double)pRow.get_Value(1);
pids.Add((int)pRow.get_Value(0));
pRow = pCursor.NextRow();
// progress.Invoke((MethodInvoker)delegate()
// {
// if (progress.Value < progress.Maximum)
// {
// progress.Value++;
// }
// });
if (progress.Value < progress.Maximum)
{
progress.Value++;
}
}
zoneArea.Add(area);
patchIDs.Add(pids);
}
for (int i = 0; i < patchIDs.Count; i++)
{
patchIDArray.Add(GetZonePids(i));
// progress.Invoke((MethodInvoker)delegate()
// {
// if (progress.Value < progress.Maximum)
// {
// progress.Value++;
// }
// });
if (progress.Value < progress.Maximum)
{
progress.Value++;
}
}
}
