ArcEngine 栅格数据另存结果空白

软件版本：ArcEngine10.2.2
测试数据：链接：https://pan.baidu.com/s/1o8mmaXO 密码：e8rg

操作步骤：
1.加载测试数据TAS_IPAS_IBC_20171204162303721.tif（注：该图层有五个波段）
2.调用ISaveas2 接口另存为jpg数据

输出结果：输出的结果识别像素值为4095

代码：

		/// <summary>

        /// 执行另存

        /// </summary>

        /// <param name="bSetRepresentationType"></param>

        /// <param name="representationType"></param>

        /// <param name="bUseMessagebox"></param>

        /// <returns></returns>

        public bool SaveAs(bool bSetRepresentationType = false, rstRepresentationType representationType = rstRepresentationType.DT_ATHEMATIC, bool bUseMessagebox = true)

        {

            object objValue = m_checkedCmbBand.EditValue;

            if (objValue == null)

            {

                XtraMessageBox.Show(AppMessage.MSG0070, AppMessage.MSG0000, MessageBoxButtons.OK, MessageBoxIcon.Information);

                return false;

            }

            if (string.IsNullOrEmpty(m_sOutputPath))

            {

                XtraMessageBox.Show(AppMessage.MSG0067, AppMessage.MSG0000, MessageBoxButtons.OK, MessageBoxIcon.Information);

                return false;

            }



            FileInfo fileInfo = new FileInfo(m_sOutputPath);

            if (fileInfo.Exists)

            {

                if (XtraMessageBox.Show(AppMessage.MSG0170, AppMessage.MSG0000, MessageBoxButtons.OKCancel, MessageBoxIcon.Information) == DialogResult.OK)

                {

                    fileInfo.Delete();

                }

                else

                {

                    return false;

                }

            }



            IRaster raster = m_raster;

            //获取输出波段

            string bandNames = objValue.ToString().Split(',');

            if (bandNames.Length != m_bandList.Count)

            {

                IRaster newRaster = ((m_raster as IRaster2).RasterDataset as IRasterDataset3).CreateRaster();

                IRasterProps newRasterProps = newRaster as IRasterProps;

                newRasterProps.Width = (m_raster as IRasterProps).Width;

                newRasterProps.Height = (m_raster as IRasterProps).Height;

                IRasterBandCollection newBandColl = newRaster as IRasterBandCollection;

                IRasterBandCollection originBandColl = (m_raster as IRaster2).RasterDataset as IRasterBandCollection;

                for (int i = 0; i < originBandColl.Count; i++)

                {

                    IRasterBand band = originBandColl.Item(i);

                    foreach (string sBandName in bandNames)

                    {

                        if (sBandName.Trim() == band.Bandname)

                        {

                            newBandColl.AppendBand(band);

                            break;

                        }

                    }

                }

                raster = newRaster;

            }

            //选择重采样类型

            SetResamplingMethod(raster, m_cmbResamplingType);

            //设置像素类型

            SetPixelType(raster, m_cmbPixelType);

            //设置图像连续性

            if (bSetRepresentationType)

            {

                SetRepresentationType(raster, representationType);

            }



            DevExpress.Utils.WaitDialogForm dlg = new DevExpress.Utils.WaitDialogForm(AppMessage.MSG0073, AppMessage.MSG0000);

            IWorkspace workspace = null;

            string sResult = AppMessage.MSG0074;

            HTES.TAS.Log.Logger logger = new TAS.Log.Logger();

            try

            {

                dlg.Owner = m_frm;

                dlg.TopMost = false;

                string sFormat = m_cmbOutputType.Text;

                ISaveAs2 saveAs = raster as ISaveAs2;

                if (!saveAs.CanSaveAs(sFormat))

                {

                    XtraMessageBox.Show(AppMessage.MSG0075, AppMessage.MSG0000, MessageBoxButtons.OK, MessageBoxIcon.Information);

                    return false;

                }

                IWorkspaceFactory worksapceFactory = new RasterWorkspaceFactoryClass();

                workspace = worksapceFactory.OpenFromFile(System.IO.Path.GetDirectoryName(m_sOutputPath), 0);

                IDataset dataset = saveAs.SaveAs(System.IO.Path.GetFileName(m_sOutputPath), workspace, sFormat);

                Marshal.ReleaseComObject(dataset);

                return true;

            }

            catch (Exception ep)

            {

                sResult = AppMessage.MSG0076;

                logger.Log(HTES.TAS.DB.Model.LogLevel.Error, HTES.TAS.DB.Model.EventType.UserManagement, m_frm.Text, ep);

                return false;

            }

            finally

            {

                if (workspace != null)

                {

                    Marshal.ReleaseComObject(workspace);

                }

                dlg.Close();

                if (bUseMessagebox)

                {

                    XtraMessageBox.Show(sResult, AppMessage.MSG0000, MessageBoxButtons.OK, MessageBoxIcon.Information);

                }

            }

        }

		

        private void SetResamplingMethod(IRaster raster, ComboBoxEdit cmbResamplingType)

        {

            if (cmbResamplingType == null)

            {

                return;

            }

            switch ((ResamplingMethod)cmbResamplingType.SelectedIndex)

            {

                case ResamplingMethod.NEARSET:

                    raster.ResampleMethod = rstResamplingTypes.RSP_NearestNeighbor;

                    break;

                case ResamplingMethod.BILINEAR:

                    raster.ResampleMethod = rstResamplingTypes.RSP_BilinearInterpolation;

                    break;

                case ResamplingMethod.CUBIC:

                    raster.ResampleMethod = rstResamplingTypes.RSP_CubicConvolution;

                    break;

                case ResamplingMethod.Majority:

                    raster.ResampleMethod = rstResamplingTypes.RSP_Majority;

                    break;

            }

        }



private void SetPixelType(IRaster raster, ComboBoxEdit cmbPixelType)

        {

            if (cmbPixelType == null)

            {

                return;

            }

            IRasterProps rasterProps = raster as IRasterProps;

            switch ((PixelType)cmbPixelType.SelectedIndex)

            {

                case PixelType.Pt_char:

                    rasterProps.PixelType = rstPixelType.PT_CHAR;

                    rasterProps.NoDataValue = 127;

                    break;

                case PixelType.Pt_uchar:

                    rasterProps.PixelType = rstPixelType.PT_UCHAR;

                    rasterProps.NoDataValue = 128;

                    break;

                case PixelType.Pt_short:

                    rasterProps.PixelType = rstPixelType.PT_SHORT;

                    break;

                case PixelType.Pt_ushort:

                    rasterProps.PixelType = rstPixelType.PT_USHORT;

                    break;

                case PixelType.Pt_long:

                    rasterProps.PixelType = rstPixelType.PT_LONG;

                    break;

                case PixelType.Pt_ulong:

                    rasterProps.PixelType = rstPixelType.PT_ULONG;

                    break;

                case PixelType.Pt_float32:

                    rasterProps.PixelType = rstPixelType.PT_FLOAT;

                    break;

                case PixelType.Pt_float64:

                    rasterProps.PixelType = rstPixelType.PT_DOUBLE;

                    break;

            }

        }



        private void SetRepresentationType(IRaster raster, rstRepresentationType rasterRepresentationType)

        {

            IRasterBandCollection rasterBandColl = (raster as IRaster2).RasterDataset as IRasterBandCollection;

            if (rasterBandColl == null)

            {

                return;

            }

            for (int i = 0; i < rasterBandColl.Count; i++)

            {

                rasterBandColl.Item(i).RepresentationType = rasterRepresentationType;

            }

        }		

问题：
不知道是我代码哪儿写错了，输出的结果不对