/// <summary>
/// Stretchդ����Ⱦ
/// </summary>
/// <param name="rasterLayer">դ��ͼ��</param>
/// <param name="VlaueVMax">Value���ֵ</param>
/// <param name="VlaueVMin">Value��Сֵ</param>
/// <param name="fromColor">ɫ��ʼ��ɫ</param>
/// <param name="toColor">ɫ������ɫ</param>
/// <param name="bDisplayBackGroundV">�Ƿ���ʾ����</param>
/// <param name="BackGroundValue">��ʾ������ֵ</param>
/// <param name="BackGroundColor">������ɫ</param>
/// <param name="bUserHillShade">�Ƿ�����Ӱ</param>
/// <param name="zScale">��ӰZֵ</param>
/// <param name="nodataColor">Nodata��ɫ</param>
/// <param name="StretchType">Stretch����</param>
/// <param name="StretchN">Stretch Nֵ</param>
/// <param name="bInvert">Stretchֵ�Ƿ�ת</param>
/// <param name="StatisticsType">ͳ������</param>
/// <returns></returns>
private void StretchRenderer(IRasterLayer rasterLayer, string VlaueVMax, string VlaueVMin, string ValueMedium, IColor fromColor, IColor toColor,
bool bDisplayBackGroundV, double BackGroundValue, IColor BackGroundColor, bool bUserHillShade, Double zScale, IColor nodataColor,
string StretchType, double StretchN, bool bInvert, string StatisticsType)
{
try
{
//Create the color ramp.
IAlgorithmicColorRamp colorRamp = new AlgorithmicColorRampClass();
colorRamp.FromColor = fromColor;
colorRamp.ToColor = toColor;
colorRamp.Size = 10;
bool createColorRamp;
colorRamp.CreateRamp(out createColorRamp);
//Create a stretch renderer.
IRasterStretchColorRampRenderer stretchRenderer = new
RasterStretchColorRampRendererClass();
IRasterRenderer rasterRenderer = (IRasterRenderer)stretchRenderer;
//Set the renderer properties.
IRaster raster = rasterLayer.Raster;
rasterRenderer.Raster = raster;
rasterRenderer.Update();
stretchRenderer.BandIndex = 0;
stretchRenderer.ColorRamp = colorRamp;
stretchRenderer.LabelLow = VlaueVMin;
stretchRenderer.LabelHigh = VlaueVMax;
stretchRenderer.LabelMedium = ValueMedium;
(stretchRenderer as IRasterStretchMinMax).UseCustomStretchMinMax = true;
(stretchRenderer as IHillShadeInfo).UseHillShade = bUserHillShade;
if (bUserHillShade == true)
(stretchRenderer as IHillShadeInfo).ZScale = zScale;
(stretchRenderer as IRasterStretch2).Background = bDisplayBackGroundV;
//double dBackGroundValue = 0;
if (bDisplayBackGroundV == true)
{
(stretchRenderer as IRasterStretch2).BackgroundValue=BackGroundValue;
(stretchRenderer as IRasterStretch2).BackgroundColor = BackGroundColor;
}
switch(StretchType)
{
case "NONE":
(stretchRenderer as IRasterStretch2).StretchType = esriRasterStretchTypesEnum.esriRasterStretch_NONE;
break;
case "DefaultFromSource":
(stretchRenderer as IRasterStretch2).StretchType = esriRasterStretchTypesEnum.esriRasterStretch_DefaultFromSource;
break;
case "Custom":
(stretchRenderer as IRasterStretch2).StretchType = esriRasterStretchTypesEnum.esriRasterStretch_Custom;
break;
case "StandardDeviations":
(stretchRenderer as IRasterStretch2).StretchType = esriRasterStretchTypesEnum.esriRasterStretch_StandardDeviations;
break;
case "HistogramEqualize":
(stretchRenderer as IRasterStretch2).StretchType = esriRasterStretchTypesEnum.esriRasterStretch_HistogramEqualize;
break;
case "MinimumMaximum":
(stretchRenderer as IRasterStretch2).StretchType = esriRasterStretchTypesEnum.esriRasterStretch_MinimumMaximum;
break;
case "HistogramSpecification":
(stretchRenderer as IRasterStretch2).StretchType = esriRasterStretchTypesEnum.esriRasterStretch_HistogramSpecification;
break;
case "Count":
(stretchRenderer as IRasterStretch2).StretchType = esriRasterStretchTypesEnum.esriRasterStretch_Count;
break;
default:
(stretchRenderer as IRasterStretch2).StretchType = esriRasterStretchTypesEnum.esriRasterStretch_StandardDeviations;
break;
}
(stretchRenderer as IRasterStretch2).StandardDeviationsParam = StretchN;
switch(StatisticsType)
{
case "AreaOfView":
(stretchRenderer as IRasterStretch2).StretchStatsType
= esriRasterStretchStatsTypeEnum.esriRasterStretchStats_AreaOfView;
//IArray ary = (stretchRenderer as IRasterStretch2).StretchStats;
//frmSymbology.m_statistics_Min =(double) ary.get_Element(0);
//frmSymbology.m_statistics_Max =(double) ary.get_Element(1);
//frmSymbology.m_statistics_Mean = (double)ary.get_Element(2);
//frmSymbology.m_statistics_stdDev = (double)ary.get_Element(3);
break;
case "Dataset":
(stretchRenderer as IRasterStretch2).StretchStatsType
= esriRasterStretchStatsTypeEnum.esriRasterStretchStats_Dataset;
break;
case "GlobalStats":
(stretchRenderer as IRasterStretch2).StretchStatsType
= esriRasterStretchStatsTypeEnum.esriRasterStretchStats_GlobalStats;
break;
}
(stretchRenderer as IRasterStretch2).Invert = bInvert;
//Set the stretch type.
//IRasterStretch stretchType = (IRasterStretch)rasterRenderer;
//stretchType.StretchType = esriRasterStretchTypesEnum.esriRasterStretch_StandardDeviations;
//stretchType.StandardDeviationsParam = 2;
rasterLayer.Renderer =stretchRenderer as IRasterRenderer;
rasterLayer.Draw(esriDrawPhase.esriDPGeography,m_MainMap.ActiveView.ScreenDisplay, null);
m_MainMap.ActiveView.Refresh();
m_MainTOC.Update();
//return rasterRenderer;
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex.Message);
return ;
}
}
/// <summary>
/// ������Ⱦ
/// </summary>
/// <param name="rasterLayer">դ��ͼ��</param>
/// <param name="VlaueFieldName">ֵ�ֶ�</param>
/// <param name="NormalLizeFieldName">��һ���ֶΣ���ѡ��</param>
/// <param name="classesCount">��������</param>
/// <param name="fromColor">ɫ��ʼ��ɫ</param>
/// <param name="toColor">ɫ������ɫ</param>
/// <param name="bShowClassBreaks">Whether or Not Show class breaks using cell values</param>
/// <param name="NodataColor">��ֵ��ɫ</param>
/// <param name="bUserHillShade">Whether or Not Use hillshade effect</param>
/// <param name="zScale">IF Use hillshade effect Set the Z value</param>
/// <returns></returns>
private void ClassifyRenderer(IRasterLayer rasterLayer, string VlaueFieldName, string NormalLizeFieldName,
int classesCount,IList<Color> lstColor,IList<double> lstBreakVal,IList<string> lstBreakLbl/*IColor fromColor, IColor toColor*/, bool bShowClassBreaks, IColor nodataColor, bool bUserHillShade,Double zScale)
{
try
{
//create the classify renderer
IRasterClassifyColorRampRenderer classifyRenderer = new RasterClassifyColorRampRendererClass();
IRasterRenderer rasterRenderer = (IRasterRenderer)classifyRenderer;
//setup renderer properties
IRaster raster = rasterLayer.Raster;
rasterRenderer.Raster = raster;
classifyRenderer.ClassCount = classesCount;
rasterRenderer.Update();
//create symbol for the classes
IFillSymbol fillSymbol = new SimpleFillSymbolClass();
for (int i = 0; i < classifyRenderer.ClassCount; i++)
{
fillSymbol.Color = Convert2ESRIColor(lstColor[i]);
classifyRenderer.set_Break(i, lstBreakVal[i]);
classifyRenderer.set_Symbol(i, (ISymbol)fillSymbol);
classifyRenderer.set_Label(i, lstBreakLbl[i]);
}
if (VlaueFieldName.Length > 0 && VlaueFieldName.ToUpper() != "NONE")
classifyRenderer.ClassField = VlaueFieldName;
if (NormalLizeFieldName.Length > 0 && NormalLizeFieldName.ToUpper()!= "NONE")
classifyRenderer.NormField = NormalLizeFieldName;
(classifyRenderer as IHillShadeInfo).UseHillShade = bUserHillShade;
if(bUserHillShade==true)
{
(classifyRenderer as IHillShadeInfo).ZScale = zScale;
}
if(nodataColor!=null)
(classifyRenderer as IRasterDisplayProps).NoDataColor = nodataColor;
rasterLayer.Renderer = rasterRenderer;
rasterLayer.Draw(esriDrawPhase.esriDPGeography, m_MainMap.ActiveView.ScreenDisplay, null);
m_MainMap.ActiveView.Refresh();
m_MainTOC.Update();
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex.Message);
return ;
}
}
