private bool GetUniqueValues(string inFile)
{
IRasterLayer pRasterLayer = null;
IUniqueValues pUniqueValues = null;
IRasterCalcUniqueValues pCalcUniqueValues = null;
try
{
pRasterLayer = new RasterLayerClass();
pRasterLayer.CreateFromFilePath(inFile);
if (!(1 == pRasterLayer.BandCount))
{
XtraMessageBox.Show("文件类型不正确，请选择分类结果文件！", "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
return(false);
}
pUniqueValues = new UniqueValuesClass();
pCalcUniqueValues = new RasterCalcUniqueValuesClass();
pCalcUniqueValues.AddFromRaster(pRasterLayer.Raster, 0, pUniqueValues);
if (_dt.Rows.Count > 0)
{
_dt.Rows.Clear();
}
for (int i = 0; i < pUniqueValues.Count; i++)
{
DataRow row = _dt.NewRow();
row[0] = pUniqueValues.get_UniqueValue(i);
_dt.Rows.Add(row);
}
return(true);
}
catch (Exception ex)
{
XtraMessageBox.Show("读取唯一值失败！\r\n" + ex.Message, "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
Log.WriteLog(typeof(frmRecode), ex);
return(false);
}
finally
{
if (pCalcUniqueValues != null)
{
Marshal.ReleaseComObject(pCalcUniqueValues);
}
if (pUniqueValues != null)
{
Marshal.ReleaseComObject(pUniqueValues);
}
if (pRasterLayer != null)
{
Marshal.ReleaseComObject(pRasterLayer);
}
}
}
/// <summary>
/// Gets the class value from raster.
/// </summary>
/// <param name="inFile">The in file.</param>
/// <returns>List<System.String>.</returns>
/// <exception cref="System.Exception">文件类型不正确，请选择分类结果文件！</exception>
public static List <string> GetClassFromRaster(string inFile)
{
IRasterLayer pRasterLayer = null;
IUniqueValues pUniqueValues = null;
IRasterCalcUniqueValues pCalcUniqueValues = null;
List <string> classNames = null;
try
{
pRasterLayer = new RasterLayerClass();
pRasterLayer.CreateFromFilePath(inFile);
if (!(1 == pRasterLayer.BandCount))
{
throw new Exception("文件类型不正确，请选择分类结果文件！");
}
pUniqueValues = new UniqueValuesClass();
pCalcUniqueValues = new RasterCalcUniqueValuesClass();
pCalcUniqueValues.AddFromRaster(pRasterLayer.Raster, 0, pUniqueValues);
classNames = new List <string>();
for (int i = 0; i < pUniqueValues.Count; i++)
{
classNames.Add(pUniqueValues.get_UniqueValue(i).ToString());
}
return(classNames);
}
catch (Exception ex)
{
throw ex;
}
finally
{
if (pCalcUniqueValues != null)
{
Marshal.ReleaseComObject(pCalcUniqueValues);
}
if (pUniqueValues != null)
{
Marshal.ReleaseComObject(pUniqueValues);
}
if (pRasterLayer != null)
{
Marshal.ReleaseComObject(pRasterLayer);
}
}
}
