/// <summary>
/// 根据文件获取图层
/// </summary>
/// <param name="filePath">文件</param>
/// <returns></returns>
public static ILayer GetLayerByFile(string filePath)
{
if (Path.GetExtension(filePath) == ".shp")
{
return(FeatureInfoClass.GetFeatureLayer(filePath));
}
return(RasterDataInfoClass.GetRasterLayer(filePath));
}
/// <summary>
/// 数据集复制为临时图层
/// </summary>
/// <param name="inFile"></param>
/// <returns></returns>
public static ILayer CopyAsTempLayer(string inFile)
{
bool isFeatureFile = FeatureInfoClass.IsFeatureFile(inFile);
string outFile = isFeatureFile
? TempFile.CreateNewTempFile(temExtension: "shp")
: TempFile.CreateNewTempFile();
return(CopyAsLayer(inFile, outFile));
}
/// <summary>
/// 获取属性表
/// </summary>
/// <returns></returns>
public static DataTable GetAttributeTable(ComboBox cboInVector, List <string> mapFeatureFilePath)
{
string vectorFile = LayerInfoClass.GetFilePathFromList(cboInVector.Text, mapFeatureFilePath);
if (string.IsNullOrEmpty(vectorFile))
{
return(null);
}
IFeatureLayer featureLayer = FeatureInfoClass.GetFeatureLayer(vectorFile);
return(GetAttributeTable(featureLayer));
}
/// <summary>
/// 获取图层指定字段名称的属性表
/// </summary>
/// <param name="layer">图层</param>
/// <param name="queryFilter2">查询条件</param>
/// <param name="rowCount">显示的行数</param>
/// <param name="inFieldName">指定字段名称</param>
/// <returns>属性表</returns>
public static DataTable GetAttributeTable(ILayer layer, Dictionary <string, int> inFieldName,
IQueryFilter2 queryFilter2 = null, int rowCount = 0)
{
HashSet <string> fieldNames = new HashSet <string>();
foreach (var key in inFieldName.Keys)
{
fieldNames.Add(key);
}
return(GetAttributeTableByITable(GetITableByLayer(layer), fieldNames, FeatureInfoClass.GetShapeType(layer),
queryFilter2, rowCount));
}
/// <summary>
/// 数据集复制为矢量图层
/// </summary>
/// <param name="dataset">数据集</param>
/// <param name="outFile">输出文件</param>
/// <returns></returns>
public static ILayer CopyDatasetAsFeatureLayer(IDataset dataset, string outFile)
{
//数据为空或文件已存在，则返回null
if (IsCannotCopy(dataset, outFile))
{
return(null);
}
string fileName = Path.GetFileNameWithoutExtension(outFile);
IWorkspace workSpace = FeatureInfoClass.GetShapefileWorkspace(outFile);
dataset.Copy(fileName, workSpace);
return(FeatureInfoClass.GetFeatureLayer(outFile));
}
/// <summary>
/// 转换图层坐标系
/// </summary>
/// <param name="inFilePath">图层</param>
/// <param name="spatialReference">坐标系</param>
/// <param name="outFile">输出文件</param>
public static void ChangeLayerCoordinateSystem(string inFilePath, ISpatialReference spatialReference,
string outFile)
{
if (spatialReference == null)
{
return;
}
if (FeatureInfoClass.IsFeatureFile(inFilePath))
{
ChangeFeatureCoordinateSystem(inFilePath, spatialReference, outFile);
}
else
{
ChangeRasterCoordinateSystem(inFilePath, spatialReference, outFile);
}
}
/// <summary>
/// 数据集复制为图层
/// </summary>
/// <param name="inFile"></param>
/// <param name="outFile">输出文件</param>
/// <returns></returns>
public static ILayer CopyAsLayer(string inFile, string outFile)
{
IDataset dataset = GetDataset(inFile);
//数据不能复制
if (IsCannotCopy(dataset, outFile))
{
return(null);
}
//从数据集中复制图层
ILayer layer = FeatureInfoClass.IsFeatureFile(inFile)
? CopyDatasetAsFeatureLayer(dataset, outFile)
: CopyDatasetAsRasterLayer(dataset, outFile);
return(layer);
}
/// <summary>
/// 获取图层指定字段名称的属性表
/// </summary>
/// <param name="layer">图层</param>
/// <param name="queryFilter2">查询条件</param>
/// <param name="rowCount">显示的行数</param>
/// <param name="inFieldName">指定字段名称</param>
/// <returns>属性表</returns>
public static DataTable GetAttributeTable(ILayer layer, HashSet <string> inFieldName,
IQueryFilter2 queryFilter2 = null, int rowCount = 0)
{
return(GetAttributeTableByITable(GetITableByLayer(layer), inFieldName, FeatureInfoClass.GetShapeType(layer),
queryFilter2, rowCount));
}
/// <summary>
/// 获取数据集
/// </summary>
/// <param name="inFile"></param>
public static IDataset GetDataset(string inFile)
{
return(FeatureInfoClass.IsFeatureFile(inFile)
? FeatureInfoClass.GetDataset(inFile)
: RasterDataInfoClass.GetDataset(inFile));
}