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 void drawLine()
{
IUniqueValues uniqueValues = new UniqueValuesClass();
IRasterCalcStatsHistogram calcstatsHistogram = new RasterCalcStatsHistogramClass();
IStatsHistogram statsHistogram = new StatsHistogramClass();
calcstatsHistogram.ComputeFromRaster(rasterLayer.Raster, 0, statsHistogram);
IRasterCalcUniqueValues calcUniqueValues = new RasterCalcUniqueValuesClass();
try
{
calcUniqueValues.AddFromRaster(rasterLayer.Raster, 0, uniqueValues);
double[] ArrVal = new double[uniqueValues.Count];
System.Int32[] ArrFreq = new System.Int32[uniqueValues.Count];
for (var i = 0; i < uniqueValues.Count; i++)
{
ArrVal[i] = Convert.ToDouble(uniqueValues.get_UniqueValue(i));
ArrFreq[i] = uniqueValues.get_UniqueCount(i);
}
valueChooseInChart1.drawLine(ArrVal, ArrFreq, Convert.ToInt32(spinEdit1.Text));
}
catch
{
valueChooseInChart1.drawline(statsHistogram.Min, statsHistogram.Max, Convert.ToInt16(spinEdit1.Text));
}
}
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;
}
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);
}
}
}
public double[] getOraDataStringArray()
{
List <double> arr = new List <double>();
arr.Clear();
if (this.RasterLayerClass != null &&
this.RasterLayerClass.AttributeTable != null)
{
ITable tb = this.RasterLayerClass.AttributeTable as ITable;
if (tb != null)
{
object[] objArr = this.Unique(tb, "Value", "");
foreach (object obj in objArr)
{
arr.Add(double.Parse(obj.ToString()));
}
arr.Sort();
}
}
else if (this.RasterLayerClass.AttributeTable == null)
{
//渲染方式获取Value值的方法
//this.RasterLayerClass.Renderer = new RasterValueClass();
for (int ib = 0; ib < this.RasterLayerClass.BandCount; ib++)
{
IUniqueValues uv = new UniqueValuesClass();
IRasterCalcUniqueValues rcuv = new RasterCalcUniqueValuesClass();
rcuv.AddFromRaster(this.RasterLayerClass.Raster, ib, uv);
for (int i = 0; i < uv.Count; i++)
{
arr.Add(double.Parse(uv.get_UniqueValue(i).ToString()));
}
}
arr.Sort();
}
return(arr.ToArray());
}
/// <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);
}
}