public IRasterRenderer CreateDefaultRasterRenderer(IRaster raster)
{
//Get raster dataset
IRasterBandCollection rasterBandCollection = (IRasterBandCollection)raster;
IRasterBand rasterBand = rasterBandCollection.Item(0);
IRasterDataset rasterDataset = (IRasterDataset)rasterBand;
//Check for TIFF format
string format_Renamed = rasterDataset.Format;
if (format_Renamed.Substring(0, 4) != "TIFF")
{
return(null);
}
//check for bit depth
IRasterProps rasterProps = (IRasterProps)rasterBand;
if (rasterProps.PixelType != rstPixelType.PT_U1)
{
return(null);
}
//create renderer for 1 bit raster
//Create a unique value renderer and associate it with raster
IRasterUniqueValueRenderer rasterUniqueValueRenderer = new RasterUniqueValueRendererClass();
IRasterRenderer rasterRenderer = (IRasterRenderer)rasterUniqueValueRenderer;
rasterRenderer.Raster = raster;
rasterRenderer.Update();
//Define the renderer
rasterUniqueValueRenderer.HeadingCount = 1;
rasterUniqueValueRenderer.set_Heading(0, "");
rasterUniqueValueRenderer.set_ClassCount(0, 2);
rasterUniqueValueRenderer.Field = "VALUE";
rasterUniqueValueRenderer.AddValue(0, 0, 0);
rasterUniqueValueRenderer.AddValue(0, 1, 1);
rasterUniqueValueRenderer.set_Label(0, 0, "0");
rasterUniqueValueRenderer.set_Label(0, 1, "1");
// Define symbology for rendering value 0
IColor color1 = (IColor)(CreateRGBColor(200, 50, 0)); //Brown color
ISimpleFillSymbol simpleFillSymbol1 = new SimpleFillSymbolClass();
simpleFillSymbol1.Color = color1;
rasterUniqueValueRenderer.set_Symbol(0, 0, (ISymbol)simpleFillSymbol1);
IColor color2 = new RgbColorClass();
color2.NullColor = true;
ISimpleFillSymbol simpleFillSymbol2 = new SimpleFillSymbolClass();
simpleFillSymbol2.Color = color2;
rasterUniqueValueRenderer.set_Symbol(0, 1, (ISymbol)simpleFillSymbol2);
return(rasterRenderer);
}
// 专题图符号化（唯一值符号化 - 颜色带渐变） - 事件入口
private void btn_symbology_Click(object sender, EventArgs e)
{
//IRasterRenderer pRenderer = new RasterStretchColorRampRendererClass(){
// BandIndex = 0,
// ColorRamp = GetColorRamp(GetRgbColor(0, 255, 0), GetRgbColor(255, 0, 0), 5)
//};
//pRenderer.Raster = (m_pLayer as IRasterLayer).Raster;
//pRenderer.Update();
//(m_pLayer as IRasterLayer).Renderer = pRenderer;
//axPageLayoutControl_main.Refresh();
IRasterUniqueValueRenderer pRenderer = new RasterUniqueValueRendererClass()
{
ColorRamp = GetColorRamp(GetRgbColor(0, 255, 0), GetRgbColor(255, 0, 0), 4)
};
(pRenderer as IRasterRenderer).Raster = (m_pLayer as IRasterLayer).Raster;
(pRenderer as IRasterRenderer).Update();
SetRasterRendererInfo(pRenderer, 0, 1, "非敏感");
SetRasterRendererInfo(pRenderer, 1, 2, "低敏感");
SetRasterRendererInfo(pRenderer, 2, 3, "中敏感");
SetRasterRendererInfo(pRenderer, 3, 4, "高敏感");
(m_pLayer as IRasterLayer).Renderer = pRenderer as IRasterRenderer;
axPageLayoutControl_main.Refresh();
}
/// <summary>
/// Asigna la simbologia establecida a la capa de probabilidades
/// </summary>
/// <param name="pRLayer">Objeto RasterLayer a Simbolizar</param>
private void AsignarSimbologiaProbabilidad(IRasterLayer pRLayer)
{
IRasterUniqueValueRenderer pRUVRenderer = new RasterUniqueValueRendererClass();
IRasterRenderer pRRenderer = pRUVRenderer as IRasterRenderer;
string sLayerName = pRLayer.Name;
int iNumDias = 0;
try
{
iNumDias = System.Convert.ToInt32(sLayerName.Substring(sLayerName.Length - 1, 1));
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
IRgbColor pColor = new RgbColorClass();
pRRenderer.Raster = pRLayer.Raster;
pRRenderer.ResamplingType = rstResamplingTypes.RSP_BilinearInterpolation;
pRUVRenderer.HeadingCount = 1;
pRUVRenderer.set_Heading(0, "Probabilidad para " + iNumDias.ToString() + " días");
pRUVRenderer.set_ClassCount(0, 6);
AsignarColorAClase(0, "", 255, 255, 255, pRUVRenderer);
AsignarColorAClase(1, "Muy Baja", 0, 255, 0, pRUVRenderer);
AsignarColorAClase(2, "Baja", 255, 240, 70, pRUVRenderer);
AsignarColorAClase(3, "Moderada", 255, 220, 100, pRUVRenderer);
AsignarColorAClase(4, "Alta", 255, 100, 20, pRUVRenderer);
AsignarColorAClase(5, "Muy Alta", 255, 0, 0, pRUVRenderer);
pRUVRenderer.UseDefaultSymbol = false;
pRRenderer.Update();
pRLayer.Renderer = pRRenderer;
}
/// <summary>
/// 浮点类型图层的唯一值渲染
/// </summary>
/// <param name="pStyleGalleryItem">颜色带样式</param>
public void FloatRasterUniqueRenderer(IStyleGalleryItem pStyleGalleryItem)
{
if (pStyleGalleryItem == null)
{
MessageBox.Show(@"Color ramp cannot be empty");
return;
}
IRasterUniqueValueRenderer uniqueValueRenderer = new RasterUniqueValueRendererClass();
IRasterRenderer pRasterRenderer = uniqueValueRenderer as IRasterRenderer;
pRasterRenderer.Raster = rasterLayer.Raster;
pRasterRenderer.Update();
//必须设置栅格渲染的唯一值，不然只能渲染0值
SetRasterUniqueValue(uniqueValueRenderer);
//获取排好序的唯一值
List <object> uniqueValue = GetFloatSortedUniqueValue();
int uniqueCount = uniqueValue.Count;
if (uniqueCount == 0)
{
MessageBox.Show(@"The count of unique value cannot be zero");
return;
}
uniqueValueRenderer.set_ClassCount(0, uniqueCount);
IEnumColors enumColors = RenderHelper.GetEnumColors(pStyleGalleryItem, uniqueCount);
enumColors.Reset();
//添加唯一值和设置标注符号
AddValueAndSetLabelSymbol(uniqueValueRenderer, uniqueValue, enumColors);
rasterLayer.Renderer = pRasterRenderer;
}
/// <summary>
/// 唯一值渲染（注意字段类型要一致）
/// </summary>
/// <param name="uniqueValue">唯一值列表</param>
/// <param name="uniqueFiled">字段</param>
/// <param name="pStyleGalleryItem">颜色带样式</param>
public void UniqueRenderer <T>(List <T> uniqueValue, string uniqueFiled, IStyleGalleryItem pStyleGalleryItem)
{
if (pStyleGalleryItem == null)
{
MessageBox.Show(@"Color ramp cannot be empty");
return;
}
IRasterUniqueValueRenderer uniqueValueRenderer = new RasterUniqueValueRendererClass();
IRasterRenderer pRasterRenderer = uniqueValueRenderer as IRasterRenderer;
pRasterRenderer.Raster = rasterLayer.Raster;
pRasterRenderer.Update();
int uniqueCount = uniqueValue.Count;
if (uniqueCount == 0)
{
MessageBox.Show(@"The count of unique value cannot be zero");
return;
}
//设置唯一值渲染属性
SetUniqueRendererProperty(uniqueValueRenderer, uniqueFiled, uniqueCount);
IEnumColors enumColors = RenderHelper.GetEnumColors(pStyleGalleryItem, uniqueCount);
enumColors.Reset();
//添加唯一值和设置标注符号
AddValueAndSetLabelSymbol(uniqueValueRenderer, uniqueValue, enumColors);
rasterLayer.Renderer = pRasterRenderer;
}
//渲染评价图
public void RenderPJT()
{
if (this.RasterLayerClass != null)
{
RasterUniqueValueRendererClass rUV = new RasterUniqueValueRendererClass();
rUV.Raster = this.RasterLayerClass.Raster;
rUV.Update();
rUV.HeadingCount = 1;
rUV.set_ClassCount(0, 4);
rUV.Field = "Value";
//不适宜类
rUV.AddValue(0, 0, 0);
RgbColorClass fc1 = new RgbColorClass();
fc1.Red = 255; //红色
fc1.Green = 0;
fc1.Blue = 0;
rUV.set_Label(0, 0, "不适宜类");
IFillSymbol cs1 = new SimpleFillSymbol();
cs1.Color = fc1 as IColor;
rUV.set_Symbol(0, 0, cs1 as ISymbol);
//基本适宜类
rUV.AddValue(0, 1, 1);
RgbColorClass fc2 = new RgbColorClass();
fc2.Red = 255; //
fc2.Green = 128;
fc2.Blue = 64;
rUV.set_Label(0, 1, "基本适宜类");
IFillSymbol cs2 = new SimpleFillSymbol();
cs2.Color = fc2 as IColor;
rUV.set_Symbol(0, 1, cs2 as ISymbol);
//中度适宜类
rUV.AddValue(0, 2, 2);
RgbColorClass fc3 = new RgbColorClass();
fc3.Red = 141; //
fc3.Green = 233;
fc3.Blue = 86;
rUV.set_Label(0, 2, "中度适宜类");
IFillSymbol cs3 = new SimpleFillSymbol();
cs3.Color = fc3 as IColor;
rUV.set_Symbol(0, 2, cs3 as ISymbol);
//高度适宜类
rUV.AddValue(0, 3, 3);
RgbColorClass fc4 = new RgbColorClass();
fc4.Red = 0; //
fc4.Green = 128;
fc4.Blue = 0;
rUV.set_Label(0, 3, "高度适宜类");
IFillSymbol cs4 = new SimpleFillSymbol();
cs4.Color = fc4 as IColor;
rUV.set_Symbol(0, 3, cs4 as ISymbol);
this.RasterLayerClass.Renderer = rUV;
}
}
public IRasterRenderer CreateDefaultRasterRenderer(IRaster raster)
{
//Get raster dataset
IRasterBandCollection rasterBandCollection = (IRasterBandCollection)raster;
IRasterBand rasterBand = rasterBandCollection.Item(0);
IRasterDataset rasterDataset = (IRasterDataset)rasterBand;
//Check for TIFF format
string format_Renamed = rasterDataset.Format;
if (format_Renamed.Substring(0, 4) != "TIFF")
{
return null;
}
//check for bit depth
IRasterProps rasterProps = (IRasterProps)rasterBand;
if (rasterProps.PixelType != rstPixelType.PT_U1)
{
return null;
}
//create renderer for 1 bit raster
//Create a unique value renderer and associate it with raster
IRasterUniqueValueRenderer rasterUniqueValueRenderer = new RasterUniqueValueRendererClass();
IRasterRenderer rasterRenderer = (IRasterRenderer)rasterUniqueValueRenderer;
rasterRenderer.Raster = raster;
rasterRenderer.Update();
//Define the renderer
rasterUniqueValueRenderer.HeadingCount = 1;
rasterUniqueValueRenderer.set_Heading(0, "");
rasterUniqueValueRenderer.set_ClassCount(0, 2);
rasterUniqueValueRenderer.Field = "VALUE";
rasterUniqueValueRenderer.AddValue(0, 0, 0);
rasterUniqueValueRenderer.AddValue(0, 1, 1);
rasterUniqueValueRenderer.set_Label(0, 0, "0");
rasterUniqueValueRenderer.set_Label(0, 1, "1");
// Define symbology for rendering value 0
IColor color1 = (IColor)(CreateRGBColor(200, 50, 0)); //Brown color
ISimpleFillSymbol simpleFillSymbol1 = new SimpleFillSymbolClass();
simpleFillSymbol1.Color = color1;
rasterUniqueValueRenderer.set_Symbol(0, 0, (ISymbol)simpleFillSymbol1);
IColor color2 = new RgbColorClass();
color2.NullColor = true;
ISimpleFillSymbol simpleFillSymbol2 = new SimpleFillSymbolClass();
simpleFillSymbol2.Color = color2;
rasterUniqueValueRenderer.set_Symbol(0, 1, (ISymbol)simpleFillSymbol2);
return rasterRenderer;
}
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);
}
public static void uniqueRender(IRasterLayer rasterLayer)
{
if (rasterLayer == null)
{
return;
}
IRaster raster = rasterLayer.Raster;
IRasterUniqueValueRenderer render = new RasterUniqueValueRendererClass();
IRasterRenderer rasterRender = render as IRasterRenderer;
rasterRender.Raster = raster;
rasterRender.Update();
IUniqueValues uniqueValues = new UniqueValuesClass();
IRasterCalcUniqueValues calcUniqueValues = new RasterCalcUniqueValuesClass();
calcUniqueValues.AddFromRaster(raster, 0, uniqueValues);
IRasterRendererUniqueValues renderUniqueValues = render as IRasterRendererUniqueValues;
renderUniqueValues.UniqueValues = uniqueValues;
render.Field = "Value";
render.HeadingCount = 1;
render.set_Heading(0, "淹没水深");
render.set_ClassCount(0, uniqueValues.Count);
IRandomColorRamp ramp = new RandomColorRampClass();
ramp.Size = uniqueValues.Count;
bool b = true;
ramp.CreateRamp(out b);
for (int i = 0; i < uniqueValues.Count; i++)
{
render.AddValue(0, i, uniqueValues.get_UniqueValue(i));
render.set_Label(0, i, uniqueValues.get_UniqueValue(i).ToString());
ISimpleFillSymbol fillSymbol = new SimpleFillSymbolClass();
fillSymbol.Color = ramp.get_Color(i);
render.set_Symbol(0, i, fillSymbol as ISymbol);
}
rasterRender.Update();
rasterLayer.Renderer = rasterRender;
}
//Ϊդ��ͼ�����ݽ���Ψһֵ��ɫ
public static IRasterLayer GetRLayerUniqueColor(IRaster pRaster, double dMaxDis)
{
try
{
IRasterBandCollection pBandCol = pRaster as IRasterBandCollection;
IRasterBand pBand = pBandCol.Item(0) as IRasterBand;
bool ExistTable;
ITable pTable = null;
pBand.HasTable(out ExistTable);
if (ExistTable == false)
{
pTable = pBand.AttributeTable as ITable;
}
int iNumOfValues = pTable.RowCount(null);
string sFieldName = "Value";
int iFieldIndex = pTable.FindField(sFieldName);
IRandomColorRamp pRamp = new RandomColorRampClass();
pRamp.Size = iNumOfValues;
pRamp.Seed = 100;
bool a = true;
pRamp.CreateRamp(out a);
IFillSymbol pFSymbol = new SimpleFillSymbolClass();
IRasterUniqueValueRenderer pUVRen = new RasterUniqueValueRendererClass();
IRasterRenderer pRasRen = pUVRen as IRasterRenderer;
pRasRen.Raster = pRaster;
pRasRen.Update();
pUVRen.HeadingCount = 1;
pUVRen.set_Heading(0, "�ȼ�");
pUVRen.set_ClassCount(0, iNumOfValues);
pUVRen.Field = sFieldName;
//��ʼѭ��������ɫ
double LabelValue;
double s = Convert.ToDouble(dMaxDis / 5);
IRgbColor pRGBColor = new RgbColorClass();
for (int i = 0; i < iNumOfValues - 1; i++)
{
IColor pColor = pRamp.get_Color(i);
IRow pRow = pTable.GetRow(i);
string sLabel = "";
LabelValue = Convert.ToDouble(pRow.get_Value(iFieldIndex));
if (LabelValue >= 0 || LabelValue <= s)
{
sLabel = "0" + "��" + s.ToString();
pRGBColor.Red = 0;
pRGBColor.Green = 112;
pRGBColor.Blue = 255;
pColor = pRGBColor as IColor;
}
double h1 = s * 2;
if (LabelValue >= s || LabelValue <= s * 2)
{
sLabel = s.ToString() + "��" + h1.ToString();
pRGBColor.Red = 0;
pRGBColor.Green = 112;
pRGBColor.Blue = 255;
pColor = pRGBColor as IColor;
}
double h2 = s * 3;
if (LabelValue >= s * 2 || LabelValue <= s * 3)
{
sLabel = h1.ToString() + "��" + h2.ToString();
pRGBColor.Red = 0;
pRGBColor.Green = 112;
pRGBColor.Blue = 255;
pColor = pRGBColor as IColor;
}
double h3 = s * 4;
if (LabelValue >= s * 3 || LabelValue <= s * 4)
{
sLabel = h2.ToString() + "��" + h3.ToString();
pRGBColor.Red = 0;
pRGBColor.Green = 112;
pRGBColor.Blue = 255;
pColor = pRGBColor as IColor;
}
double h4 = s * 5;
if (LabelValue >= s * 4 || LabelValue <= s * 5)
{
sLabel = h3.ToString() + "��" + h4.ToString();
pRGBColor.Red = 0;
pRGBColor.Green = 112;
pRGBColor.Blue = 255;
pColor = pRGBColor as IColor;
}
pUVRen.AddValue(0, i, LabelValue);
pUVRen.set_Label(0, i, sLabel);
pFSymbol.Color = pColor;
pUVRen.set_Symbol(0, i, pFSymbol as ISymbol);
}
pRasRen.Update();
IRasterLayer pRLayer = new RasterLayerClass();
pRLayer.CreateFromRaster(pRaster);
pRLayer.Renderer = pUVRen as IRasterRenderer;
return pRLayer;
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
return null;
}
}
/// <summary>
/// 得到Renderer从数据库中
/// </summary>
/// <returns></returns>
public static object GetRendererFromBlob(string sql, IWorkspace pConfigWks)
{
Exception err = null;
SysCommon.Gis.IGisTable pGISTable = new SysCommon.Gis.SysGisTable(pConfigWks);
//获取Renderer
byte[] renderByte = pGISTable.GetFieldValue("Render", "Render", sql, out err) as byte[];
//是否得到了序列化的blob，没得到，则返回NULL
if (renderByte == null)
{
return(null);
}
IMemoryBlobStreamVariant pMemoryBlobStreamVariant = new MemoryBlobStreamClass();
pMemoryBlobStreamVariant.ImportFromVariant((object)renderByte);
IStream pStream = pMemoryBlobStreamVariant as IStream;
//从数据库中得到符号的类型 shduan 20110721 增加RasterRenderer
string strRenderType = pGISTable.GetFieldValue("Render", "RenderType", sql, out err).ToString();
string strLyrType = pGISTable.GetFieldValue("Render", "LayerType", sql, out err).ToString();
if (strLyrType == "RasterLayer")
{
IRasterRenderer pRRenderer = null;
switch (strRenderType)
{
case "RasterClassifyColorRampRenderer":
pRRenderer = new RasterClassifyColorRampRendererClass();
break;
case "RasterUniqueValueRenderer":
pRRenderer = new RasterUniqueValueRendererClass();
break;
case "RasterDiscreteColorRenderer":
pRRenderer = new RasterDiscreteColorRendererClass();
break;
case "RasterRGBRenderer":
pRRenderer = new RasterRGBRendererClass();
break;
case "RasterStretchColorRampRenderer":
pRRenderer = new RasterStretchColorRampRendererClass();
break;
}
IPersistStream pPersistStream = pRRenderer as IPersistStream;
pPersistStream.Load(pStream);
//pRRenderer = pPersistStream as IRasterRenderer;
return(pRRenderer);
}
else
{
IFeatureRenderer pFRenderer = null;
switch (strRenderType)
{
case "AnnoColor":
string sAnnoColor = Encoding.Default.GetString(renderByte);
return((object)sAnnoColor);
case "SimpleRenderer":
pFRenderer = new SimpleRendererClass();
break;
case "UniqueValueRenderer":
pFRenderer = new UniqueValueRendererClass();
break;
case "ClassBreaksRenderer":
pFRenderer = new ClassBreaksRendererClass();
break;
case "ProportionalSymbolRenderer":
pFRenderer = new ProportionalSymbolRendererClass();
break;
case "ChartRenderer":
pFRenderer = new ChartRendererClass();
break;
}
IPersistStream pPersistStream = pFRenderer as IPersistStream;
pPersistStream.Load(pStream);
pFRenderer = pPersistStream as IFeatureRenderer;
return(pFRenderer);
}
}
public static IRasterRenderer UniqueValueRenderer(IRasterLayer pRLayer, string strfield)
{
try
{
//Get the raster attribute table and the size of the table.
IRaster2 raster = pRLayer.Raster as IRaster2;
ITable rasterTable = (pRLayer as IAttributeTable) as ITable;
if (rasterTable == null)
{
return null;
}
int tableRows = rasterTable.RowCount(null);
//Create colors for each unique value.
ArrayList value_array = new ArrayList();
for (int i = 0; i < rasterTable.RowCount(null); i++)
{
IRow row = rasterTable.GetRow(i);
string value = row.get_Value(row.Fields.FindField(strfield)).ToString();
if (value_array.Contains(value))
{
;
}
else
{
value_array.Add(value);
}
}
//Create a unique value renderer.
IRasterUniqueValueRenderer uvRenderer = new RasterUniqueValueRendererClass();
IRasterRenderer rasterRenderer = (IRasterRenderer)uvRenderer;
rasterRenderer.Raster = raster as IRaster;
rasterRenderer.Update();
//Set the renderer properties.
uvRenderer.HeadingCount = 1;
//uvRenderer.set_Heading(0, "所有类别");
uvRenderer.set_ClassCount(0, value_array.Count);
uvRenderer.Field = "VALUE"; //Or any other field in the table.
ISimpleFillSymbol fillSymbol;
for (int i = 0; i < tableRows; i++)
{
IRow row = rasterTable.GetRow(i);
for (int value_index = 0; value_index < value_array.Count; value_index++)
{
string value = value_array[value_index].ToString();
string field = row.get_Value((row.Fields.FindField(strfield))).ToString();
if (value == field)
{
uvRenderer.AddValue(0, value_index, row.get_Value(1));
uvRenderer.set_Label(0, value_index, row.get_Value(row.Fields.FindField(strfield)).ToString());
fillSymbol = new SimpleFillSymbolClass();
if (value == "不适宜区")
fillSymbol.Color = CvtRGB(255, 255, 255);
else if (value == "次适宜区")
fillSymbol.Color = CvtRGB(76, 230, 0);
else
fillSymbol.Color = CvtRGB(38, 115, 0);
uvRenderer.set_Symbol(0, value_index, (ISymbol)fillSymbol);
}
}
}
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);
}
}
//2009-5-21
/// <summary>
/// Ψһֵ��ȾRaster
/// </summary>
/// <param name="pLayer">rasterͼ��</param>
/// <remarks></remarks>
public void UValueRenderer(IRasterLayer pLayer, string VlaueFieldName,IList<Color> lstColor/*IColor fromColor, IColor toColor*/,IColor noColor)
{
//��ȡRater
IRasterLayer pRLayer = pLayer;
IRaster pRaster = pRLayer.Raster;
// ��ȡ������Ҳ���Ǽ�¼��
IRasterBandCollection pBandCol = pRaster as IRasterBandCollection;
IRasterBand pBand = pBandCol.Item(0);
bool TableExist ;
pBand.HasTable(out TableExist);
if (!TableExist) return ;
ITable pTable = pBand.AttributeTable;
int NumOfValues = 0;
NumOfValues = pTable.RowCount(null);
// Specified a field and get the field index for the specified field to be rendered.
//ָ��һ���ֶΣ���ȡ���ֶζ�Ӧ���ֶ���ţ�ʹ�ø��ֶν�����Ⱦ
int FieldIndex = 0;
string FieldName =null;
if (VlaueFieldName.Length > 0)
FieldName = VlaueFieldName;
//Value ��Ĭ�ϵ��ֶΣ�����ָ���������ֶ���
FieldIndex = pTable.FindField(FieldName);
if (FieldIndex < 0)
return;
//bool bRamp;
ISimpleFillSymbol pFSymbol = default(ISimpleFillSymbol);
// Create UniqueValue renderer and QI RasterRenderer
IRasterUniqueValueRenderer pUVRen = new RasterUniqueValueRendererClass();
IRasterRenderer pRasRen = pUVRen as IRasterRenderer;
// Connect renderer and raster
pRasRen.Raster = pRaster;
pRasRen.Update();
// Set UniqueValue renerer
pUVRen.HeadingCount = 1;
// Use one heading
pUVRen.set_Heading(0,"All Data Values");
pUVRen.set_ClassCount(0,NumOfValues);
pUVRen.Field = FieldName;
IRow pRow = default(IRow);
object LabelValue = null;
for (int i = 0; i <= NumOfValues - 1; i++)
{
pRow = pTable.GetRow(i);
//Get a row from the table
LabelValue = pRow.get_Value(FieldIndex);
// Get value of the given index
pUVRen.AddValue(0, i, LabelValue);
//Set value for the renderer
pUVRen.set_Label(0, i,LabelValue.ToString());
//Set label
pFSymbol = new SimpleFillSymbol();
pFSymbol.Color = Convert2ESRIColor(lstColor[i])/*colorRamp.get_Color(I)*/;
//Set symbol
pUVRen.set_Symbol(0, i,pFSymbol as ISymbol);
}
if (noColor.RGB != 16777215) //255 + 65535 + 255 * 65535=16777215 //����ǰ�ɫ������ɫ���ӱ���ɫ��������ɫESRIĬ��Ϊ��ɫ
(pUVRen as IRasterDisplayProps).NoDataColor = noColor;
// Update render and refresh layer
pRasRen.Update();
pRLayer.Renderer = pUVRen as IRasterRenderer;
pRLayer.Draw(esriDrawPhase.esriDPGeography, m_MainMap.ActiveView.ScreenDisplay, null);
m_MainMap.ActiveView.Refresh();
m_MainTOC.Update();
}
