/// <summary>
/// Ge the render color of the input layer rendering with discrete color ramp.
/// </summary>
/// <param name="layer">Input raster layer</param>
/// <param name="value">Pixel value</param>
/// <returns></returns>
private static IColor GetRenderColor_UniqueValues(ILayer layer, double value)
{
IRasterLayer rasterLayer = (IRasterLayer)layer;
// Check whether the value is NoData value
IRasterProps rasterProps = (IRasterProps)rasterLayer.Raster;
System.Array noDataValue = (System.Array)rasterProps.NoDataValue;
if ((rasterProps.NoDataValue != null) && (Convert.ToDouble(noDataValue.GetValue(0)) == value))
{
return(null);
}
IRasterRendererUniqueValues uniqueValues = (IRasterRendererUniqueValues)rasterLayer.Renderer;
IRasterRendererColorRamp colorRamp = (IRasterRendererColorRamp)rasterLayer.Renderer;
for (int i = 0; i < uniqueValues.UniqueValues.Count; i++)
{
if (value == Convert.ToDouble(uniqueValues.UniqueValues.UniqueValue[i]))
{
return(colorRamp.ColorRamp.Color[i]);
}
}
return(null);
}
/// <summary>
/// Ge the render color of the input layer rendering with classified color ramp.
/// </summary>
/// <param name="layer">Input raster layer</param>
/// <param name="value">Pixel value</param>
/// <returns></returns>
private static IColor GetRenderColor_Classified(ILayer layer, double value)
{
IRasterLayer rasterLayer = (IRasterLayer)layer;
// Check whether the value is NoData value
IRasterProps rasterProps = (IRasterProps)rasterLayer.Raster;
System.Array noDataValue = (System.Array)rasterProps.NoDataValue;
if ((rasterProps.NoDataValue != null) && (Convert.ToDouble(noDataValue.GetValue(0)) == value))
{
return(null);
}
RasterClassifyColorRampRenderer rasterRender = (RasterClassifyColorRampRenderer)rasterLayer.Renderer;
IRasterRendererColorRamp colorRamp = (IRasterRendererColorRamp)rasterRender;
for (int index = 0; index < rasterRender.ClassCount - 1; index++)
{
if (value <= rasterRender.Break[index])
{
return(colorRamp.ColorRamp.Color[index]);
}
}
return(colorRamp.ColorRamp.Color[rasterRender.ClassCount - 1]);
}
public static bool UniqueValueRenderer(IColorRamp colorRamp, IRasterLayer rasterLayer, string renderfiled = "Value")
{
try
{
IRasterUniqueValueRenderer uniqueValueRenderer = new RasterUniqueValueRendererClass();
IRasterRenderer pRasterRenderer = uniqueValueRenderer as IRasterRenderer;
pRasterRenderer.Raster = rasterLayer.Raster;
pRasterRenderer.Update();
IUniqueValues uniqueValues = new UniqueValuesClass();
IRasterCalcUniqueValues calcUniqueValues = new RasterCalcUniqueValuesClass();
calcUniqueValues.AddFromRaster(rasterLayer.Raster, 0, uniqueValues);//iBand=0
IRasterRendererUniqueValues renderUniqueValues = uniqueValueRenderer as IRasterRendererUniqueValues;
renderUniqueValues.UniqueValues = uniqueValues;
uniqueValueRenderer.Field = renderfiled;
colorRamp.Size = uniqueValues.Count;
uniqueValueRenderer.HeadingCount = 1;
uniqueValueRenderer.set_Heading(0, "All Data Value");
uniqueValueRenderer.set_ClassCount(0, uniqueValues.Count);
bool pOk;
colorRamp.CreateRamp(out pOk);
IRasterRendererColorRamp pRasterRendererColorRamp = uniqueValueRenderer as IRasterRendererColorRamp;
pRasterRendererColorRamp.ColorRamp = colorRamp;
for (int i = 0; i < uniqueValues.Count; i++)
{
uniqueValueRenderer.AddValue(0, i, uniqueValues.get_UniqueValue(i));
uniqueValueRenderer.set_Label(0, i, uniqueValues.get_UniqueValue(i).ToString());
IFillSymbol fs = new SimpleFillSymbol();
//fs.Color = colorRamp.get_Color(i);
IColor color = new RgbColorClass();
if ((Convert.ToByte(uniqueValues.get_UniqueValue(i)) == 255) || (Convert.ToByte(uniqueValues.get_UniqueValue(i)) == 0))
{
color.NullColor = true;
color.Transparency = 0;
fs.Color = color;
}
else
{
IRgbColor rgbColor = color as IRgbColor;
rgbColor.Red = 0;
rgbColor.Green = 255;
rgbColor.Blue = 0;
fs.Color = rgbColor as IColor;
}
uniqueValueRenderer.set_Symbol(0, i, fs as ISymbol);
}
pRasterRenderer.Update();
rasterLayer.Renderer = pRasterRenderer;
}
catch (Exception ex)
{
return(false);
}
return(true);
}
/// <summary>
/// Ge the render color of the input layer rendering with discrete color ramp.
/// </summary>
/// <param name="layer">Input raster layer</param>
/// <param name="value">Pixel value</param>
/// <returns></returns>
private static IColor GetRenderColor_DiscreteColor(ILayer layer, double value)
{
IRasterLayer rasterLayer = (IRasterLayer)layer;
// Check whether the value is NoData value
IRasterProps rasterProps = (IRasterProps)rasterLayer.Raster;
System.Array noDataValue = (System.Array)rasterProps.NoDataValue;
if ((rasterProps.NoDataValue != null) && (Convert.ToDouble(noDataValue.GetValue(0)) == value))
{
return(null);
}
IRasterRendererColorRamp colorRamp = (IRasterRendererColorRamp)rasterLayer.Renderer;
Random rnd = new Random();
return(colorRamp.ColorRamp.Color[rnd.Next(colorRamp.ColorRamp.Size)]);
}
/// <summary>
/// Ge the render color of the input layer rendering with stretched color ramp.
/// </summary>
/// <param name="layer">Input raster layer</param>
/// <param name="value">Pixel value</param>
/// <returns></returns>
private static IColor GetRenderColor_Stretched(ILayer layer, double value)
{
IRasterLayer rasterLayer = (IRasterLayer)layer;
// Check whether the value is NoData value
IRasterProps rasterProps = (IRasterProps)rasterLayer.Raster;
System.Array noDataValue = (System.Array)rasterProps.NoDataValue;
if ((rasterProps.NoDataValue != null) && (Convert.ToDouble(noDataValue.GetValue(0)) == value))
{
return(null);
}
IRasterRendererColorRamp colorRamp = (IRasterRendererColorRamp)rasterLayer.Renderer;
IRasterStretchMinMax stretchMinMax = (IRasterStretchMinMax)rasterLayer.Renderer;
double min = 0;
double max = 0;
if (stretchMinMax.UseCustomStretchMinMax)
{
min = stretchMinMax.CustomStretchMin;
max = stretchMinMax.CustomStretchMax;
}
else
{
min = stretchMinMax.StretchMin;
max = stretchMinMax.StretchMax;
}
if (value >= max)
{
return(colorRamp.ColorRamp.Color[255]);
}
if (value <= min)
{
return(colorRamp.ColorRamp.Color[0]);
}
return(colorRamp.ColorRamp.Color[Convert.ToInt32(System.Math.Round(255 * (value - min)))]);
}
private void DiscreteColorRender(ILayer pLayerR)
{
//Get raster input from layer
IRasterLayer pRLayer = (IRasterLayer)pLayerR;
IRaster pRaster = pRLayer.Raster;
IRasterDiscreteColorRenderer pDiscreteColorRenderer = new RasterDiscreteColorRenderer();
IRasterRenderer pRasterRenderer = pDiscreteColorRenderer as IRasterRenderer;
IColorRamp MyColorRamp;
MyColorRamp = UniqueValueRandomColorRamp(300, 100);
int colornum = 300;
IRasterRendererColorRamp pRasterEndererColorRamp = pRasterRenderer as IRasterRendererColorRamp;
pRasterEndererColorRamp.ColorRamp = MyColorRamp;
pDiscreteColorRenderer.NumColors = colornum;
pRasterRenderer.Raster = pRLayer.Raster;
pRLayer.Renderer = pRasterRenderer;
}
public static IRasterRenderer CreateESRIDefinedContinuousRenderer(GCDConsoleLib.Raster gRaster, int iClassCount, string sColorRampName, bool bInvert = false)
{
try
{
gRaster.ComputeStatistics();
decimal maxValue = gRaster.GetStatistics()["max"];
int iRound = GetMagnitude(maxValue);
double maxValueRounded = Math.Round((double)maxValue, Math.Abs(iRound));
RasterStretchColorRampRenderer stretchRenderer = new RasterStretchColorRampRendererClass();
IRasterRenderer rasterRenderer = (IRasterRenderer)stretchRenderer;
IRasterDataset rasterDataset = ArcMapUtilities.GetRasterDataset(gRaster);
IRaster raster = rasterDataset.CreateDefaultRaster();
rasterRenderer.Raster = raster;
IColorRamp pColorRamp = null;
IStyleGalleryItem pStyleItem = GetESRIStyleColorRamp(out pColorRamp, sColorRampName);
IRasterRendererColorRamp pRenderColorRamp = (IRasterRendererColorRamp)rasterRenderer;
pRenderColorRamp.ColorScheme = pStyleItem.Name;
IRasterStretchMinMax pStretchInfo = (IRasterStretchMinMax)stretchRenderer;
pStretchInfo.CustomStretchMin = 0;
pStretchInfo.CustomStretchMax = maxValueRounded;
pStretchInfo.UseCustomStretchMinMax = true;
stretchRenderer.LabelHigh = maxValueRounded.ToString();
stretchRenderer.LabelLow = "0.0";
if (bInvert)
{
IRasterStretch2 pStretch = (IRasterStretch2)stretchRenderer;
pStretch.Invert = true;
}
rasterRenderer.Update();
return(rasterRenderer);
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex.Message);
return(null);
}
}
public static IRasterRenderer CreateContinuousRenderer(Raster gRaster, IColorRamp pColorRamp, bool bInvert = false)
{
try
{
gRaster.ComputeStatistics();
Dictionary <string, decimal> stats = gRaster.GetStatistics();
double rMin = (double)stats["min"];
double rMax = (double)stats["max"];
RasterStretchColorRampRenderer stretchRenderer = new RasterStretchColorRampRenderer();
IRasterRenderer rasterRenderer = (IRasterRenderer)stretchRenderer;
IRasterDataset rasterDataset = ArcMapUtilities.GetRasterDataset(gRaster);
IRaster raster = rasterDataset.CreateDefaultRaster();
rasterRenderer.Raster = raster;
IRasterRendererColorRamp pRenderColorRamp = (IRasterRendererColorRamp)rasterRenderer;
pRenderColorRamp.ColorRamp = pColorRamp;
int iRound = GetMagnitude(rMin);
stretchRenderer.LabelHigh = Math.Round(rMax, Math.Abs(iRound)).ToString();
stretchRenderer.LabelLow = Math.Round(rMin, Math.Abs(iRound)).ToString();
if (bInvert)
{
IRasterStretch2 pStretch = (IRasterStretch2)stretchRenderer;
pStretch.Invert = true;
}
rasterRenderer.Update();
return(rasterRenderer);
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex.Message);
return(null);
}
}
/// <summary>
/// 设置图层渲染器。
/// </summary>
/// <param name="rasterLayer">需要渲染唯一值的栅格图层。</param>
/// <param name="renderfiled">渲染的字段（可选，默认为Value）。</param>
/// <returns></returns>
public IRasterRenderer UniqueValueRender(IRasterLayer rasterLayer, string renderfiled = "Value")
{
try
{
//这是从头用到尾的对象
IRasterUniqueValueRenderer uniqueValueRenderer = new RasterUniqueValueRendererClass
{
Field = renderfiled
};
IRasterRenderer pRasterRenderer = uniqueValueRenderer as IRasterRenderer;
//计算栅格唯一值
IRasterCalcUniqueValues calcUniqueValues = new RasterCalcUniqueValuesClass();
IUniqueValues uniqueValues = new UniqueValuesClass();
calcUniqueValues.AddFromRaster(rasterLayer.Raster, 0, uniqueValues);
//设置唯一值
IRasterRendererUniqueValues renderUniqueValues = uniqueValueRenderer as IRasterRendererUniqueValues;
renderUniqueValues.UniqueValues = uniqueValues;
//创建色带
IRgbColor pFromColor = FromIC;
IRgbColor pToColor = ToIC;
IAlgorithmicColorRamp colorRamp = new AlgorithmicColorRampClass
{
FromColor = pFromColor,
ToColor = pToColor,
Size = uniqueValues.Count
};
bool pOk;
colorRamp.CreateRamp(out pOk);
//设置标题
uniqueValueRenderer.HeadingCount = 1;
uniqueValueRenderer.set_Heading(0, "All Data Value");
uniqueValueRenderer.set_ClassCount(0, uniqueValues.Count);
//设置色带
IRasterRendererColorRamp pRasterRendererColorRamp = uniqueValueRenderer as IRasterRendererColorRamp;
pRasterRendererColorRamp.ColorRamp = colorRamp;
//需要对算出来的唯一值升序重排
double[] tmp = new double[uniqueValues.Count];
for (int i = 0; i < uniqueValues.Count; i++)
{
tmp[i] = Convert.ToDouble(uniqueValues.get_UniqueValue(i));
}
System.Array.Sort(tmp);
//对每一个唯一值设置颜色
for (int i = 0; i < uniqueValues.Count; i++)
{
//添加唯一值并设置标签
uniqueValueRenderer.AddValue(0, i, tmp[i]);
uniqueValueRenderer.set_Label(0, i, tmp[i].ToString());
//透明色及参数
IRgbColor zerocolor = new RgbColorClass()
{
Transparency = 0,
NullColor = true,
};
IFillSymbol fs = new SimpleFillSymbol(); //唯一值填充符号
if (tmp[i] == 0) //将值为0的栅格颜色设为透明
{
fs = new SimpleFillSymbol
{
Color = zerocolor
};
}
else //值不为零则设置为色带对应索引颜色
{
fs.Color = colorRamp.get_Color(i);
}
uniqueValueRenderer.set_Symbol(0, i, fs as ISymbol); //对唯一值设置色带对应颜色
}
return(pRasterRenderer);
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
return(null);
}
}
/// <summary>
/// 初始化与拉伸相关控件
/// </summary>
private void initstreach()
{
string sInstall = ClsGDBDataCommon.GetParentPathofExe() + @"Resource\Style\ESRI.ServerStyle";
axSymbologyControl1.LoadStyleFile(sInstall);
axSymbologyControl1.StyleClass = esriSymbologyStyleClass.esriStyleClassColorRamps;
pSymbolClass = axSymbologyControl1.GetStyleClass(esriSymbologyStyleClass.esriStyleClassColorRamps);
pRasterRender = pRLayer.Renderer;
pRasterRenderColorRamp = pRasterRender as IRasterRendererColorRamp;
//生成色度带
if (pRasterRender is IRasterStretchColorRampRenderer)
{
IStyleGalleryItem pStyleGalleryItem = new ServerStyleGalleryItem();
pStyleGalleryItem.Item = pRasterRenderColorRamp.ColorRamp;
pSymbolClass.AddItem(pStyleGalleryItem, 0);
pSymbolClass.SelectItem(0);
}
for (int i = 0; i < pSymbolClass.get_ItemCount(pSymbolClass.StyleCategory); i++)
{
stdole.IPictureDisp pPicture = pSymbolClass.PreviewItem(pSymbolClass.GetItem(i), cmbColorRamp.Width, cmbColorRamp.Height);
Image image = Image.FromHbitmap(new System.IntPtr(pPicture.Handle));
cmbColorRamp.Items.Add(image);
}
if (cmbColorRamp.Items.Count > 0)
{
cmbColorRamp.SelectedIndex = 0;
}
//判断拉伸方式和拉伸波段
if (pRasterRender is IRasterStretchColorRampRenderer)
{
pSCRampRender = pRasterRender as IRasterStretchColorRampRenderer;
pRasterStretch = pRasterRender as IRasterStretch;
int bandindex = pSCRampRender.BandIndex;
cmbBand.SelectedIndex = bandindex;
if (pRasterStretch.StretchType == esriRasterStretchTypesEnum.esriRasterStretch_Custom)
{
cmbStreach.SelectedIndex = 1;
}
else if (pRasterStretch.StretchType == esriRasterStretchTypesEnum.esriRasterStretch_MinimumMaximum)
{
cmbStreach.SelectedIndex = 2;
}
else if (pRasterStretch.StretchType == esriRasterStretchTypesEnum.esriRasterStretch_StandardDeviations)
{
cmbStreach.SelectedIndex = 3;
}
else if (pRasterStretch.StretchType == esriRasterStretchTypesEnum.esriRasterStretch_HistogramEqualize)
{
cmbStreach.SelectedIndex = 4;
}
else
{
cmbStreach.SelectedIndex = 0;
}
lblminstr.Text = pSCRampRender.LabelLow;
lblmaxstr.Text = pSCRampRender.LabelHigh;
txtmin.Text = pSCRampRender.LabelLow;
txtmax.Text = pSCRampRender.LabelHigh;
if (pRasterStretch.StretchType == esriRasterStretchTypesEnum.esriRasterStretch_MinimumMaximum)
{
txtmax.Visible = true;
txtmin.Visible = false;
}
}
else
{
cmbBand.SelectedIndex = 0;
cmbStreach.SelectedIndex = 0;
}
isminmax = true;
}
