C#专题图代码.docx

private void 点密度图ToolStripMenuItem_Click(object sender, EventArgs e)
{
//获取当前图层 ，并把它设置成IGeoFeatureLayer的实例
IMap pMap = axMapControl1.Map;
ILayer pLayer = pMap.get_Layer(0) as IFeatureLayer;
IFeatureLayer pFeatureLayer = pLayer as IFeatureLayer;
IGeoFeatureLayer pGeoFeatureLayer = pLayer as IGeoFeatureLayer;

//获取图层上的feature
IFeatureClass pFeatureClass = pFeatureLayer.FeatureClass;
IFeatureCursor pFeatureCursor = pFeatureClass.Search(null, false);
IFeature pFeature = pFeatureCursor.NextFeature();

///////////////////////

///////////////////////////////////////////////////////////////////
//定义点密度图渲染组件
IDotDensityRenderer DotDensityRenderer = new DotDensityRendererClass();

//定义点密度图渲染组件对象的渲染字段对象
IRendererFields flds = (IRendererFields)DotDensityRenderer;
flds.AddField("FID", "FID");
//flds.AddField("Shape", "Shape");

//定义点密度图渲染得符号对象
IDotDensityFillSymbol ddSym = new DotDensityFillSymbolClass();
IRgbColor BackColor = new RgbColorClass();
BackColor.Red = 234;
BackColor.Blue = 128;
BackColor.Green = 220;
IRgbColor SymbolColor = new RgbColorClass();
SymbolColor.Red = 234;
SymbolColor.Blue = 128;
SymbolColor.Green = 220;
////点密度图渲染背景颜色
//ddSym.BackgroundColor = BackColor;
ddSym.DotSize =8;
ddSym.FixedPlacement = true;
//ddSym.Color = SymbolColor;
ILineSymbol pLineSymbol=new CartographicLineSymbolClass();
ddSym.Outline = pLineSymbol;

//定义符号数组
ISymbolArray symArray = (ISymbolArray)ddSym;
//添加点密度图渲染的点符号到符号数组中去
ISimpleMarkerSymbol pMarkerSymbol = new SimpleMarkerSymbolClass();
pMarkerSymbol.Style = esriSimpleMarkerStyle.esriSMSCircle;
pMarkerSymbol.Size = 2;
pMarkerSymbol.Color = SymbolColor;;

symArray.AddSymbol(pMarkerSymbol as ISymbol );

//设置点密度图渲染的点符号
//DotDensityRenderer.DotDensitySymbol =symArray;
DotDensityRenderer.DotDensitySymbol = ddSym;
//确定一个点代表多少值
DotDensityRenderer .DotValue=0.2;
//点密度渲染采用的颜色模式
DotDensityRenderer.ColorScheme = "Custom";
//创建点密度图渲染图例
DotDensityRenderer.CreateLegend();
//设置符号大小是否固定
DotDensityRenderer.MaintainSize = true;
//将点密度图渲染对象与渲染图层挂钩
pGeoFeatureLayer.Renderer = (IFeatureRenderer)DotDensityRenderer;
//刷新地图和TOOCotrol
IActiveView pActiveView = axMapControl1.Map as IActiveView;
pActiveView.Refresh();
axTOCControl1.Update();

}
private void 分层设色ToolStripMenuItem_Click(object sender, EventArgs e)
{

//获取当前图层 ，并把它设置成IGeoFeatureLayer的实例
IMap pMap = axMapControl1.Map;
ILayer pLayer = pMap.get_Layer(0) as IFeatureLayer;
IFeatureLayer pFeatureLayer = pLayer as IFeatureLayer;
IGeoFeatureLayer pGeoFeatureLayer = pLayer as IGeoFeatureLayer;

//获取图层上的feature
IFeatureClass pFeatureClass = pFeatureLayer.FeatureClass;
IFeatureCursor pFeatureCursor = pFeatureClass.Search(null, false);
IFeature pFeature = pFeatureCursor.NextFeature();

//
IFeatureRenderer PR=pGeoFeatureLayer.Renderer;

//JoinData("县级区域", "DZGB", "sectioncode"); //join外部表
// int DC ;
int desiredClasses = 5;
string fieldName = "AREA";
int classesCount;
double[] classes;
string strOutput = "";
bool ok;
object dataFrequency;
object dataValues;
ITable pTable ;
//IClassify pClassify;
EqualIntervalClass pClassify;
//IBasicHistogram pTableHistogram = new BasicTableHistogramClass();
//IHistogram pTableHistogram = new BasicTableHistogramClass();
ITableHistogram pTableHistogram = new BasicTableHistogramClass() as ITableHistogram;
IBasicHistogram pHistogram;
IClassBreaksRenderer pClassBreaksRenderer;
IHsvColor pFromColor;
IHsvColor pToColor;
IAlgorithmicColorRamp pAlgorithmicColorRamp;
IEnumColors pEnumColors;
IColor pColor;
ISimpleFillSymbol pSimpleFillSymbol;

pLayer = (IFeatureLayer)axMapControl1.get_Layer(0);
pGeoFeatureLayer = (IGeoFeatureLayer)pLayer;
pTable = (ITable)pGeoFeatureLayer;
pHistogram = (IBasicHistogram)pTableHistogram;
// Get values and frequencies for the field
pTableHistogram.Field = fieldName;
pTableHistogram.Table = pTable;
pHistogram.GetHistogram(out dataValues, out dataFrequency);
// Put values and frequencies into an Equal Interval Classify Object
pClassify = new EqualIntervalClass();
//pClassify = new NaturalBreaksClass();
pClassify.SetHistogramData(dataValues, dataFrequency);
pClassify.Classify(dataValues, dataFrequency, ref desiredClasses);
//pClassify.Classify(ref desiredClasses);
classes = (double[])pClassify.ClassBreaks;
classesCount = classes.Length;

// Initialise a new Class Breaks renderer
// Supply the number of Class Breaks and the field to perform the class breaks on
pClassBreaksRenderer = new ClassBreaksRendererClass();
pClassBreaksRenderer.Field = fieldName;
pClassBreaksRenderer.BreakCount = classesCount;
pClassBreaksRenderer.SortClassesAscending = true;
// Use algorithmic color ramp to generate an range of colors between YELLOW to RED
// Initial color: YELLOW
pFromColor = new HsvColorClass();
pFromColor.Hue = 60;
pFromColor.Saturation = 100;
pFromColor.Value = 96;
// Final color: RED
pToColor = new HsvColorClass();
pToColor.Hue = 0;
pToColor.Saturation = 100;
pToColor.Value = 96;
// Set up HSV Color ramp to span from YELLOW to RED
pAlgorithmicColorRamp = new AlgorithmicColorRampClass();
pAlgorithmicColorRamp.Algorithm = esriColorRampAlgorithm.esriHSVAlgorithm;
pAlgorithmicColorRamp.FromColor = pFromColor;
pAlgorithmicColorRamp.ToColor = pToColor;
pAlgorithmicColorRamp.Size = classesCount;
pAlgorithmicColorRamp.CreateRamp(out ok);

pEnumColors = pAlgorithmicColorRamp.Colors;
for (int index = 0; index < classesCount - 1; index++)
{
pColor = pEnumColors.Next();
pSimpleFillSymbol = new SimpleFillSymbolClass();
pSimpleFillSymbol.Color = pColor;
pSimpleFillSymbol.Style = esriSimpleFillStyle.esriSFSSolid;
pClassBreaksRenderer.set_Symbol(index, (ISymbol)pSimpleFillSymbol);
pClassBreaksRenderer.set_Break(index, classes[index + 1]);
// Store each break value for user output
strOutput += "-" + classes[index + 1] + "\n";
}
pGeoFeatureLayer.Renderer = (IFeatureRenderer)pClassBreaksRenderer;
//this.axMapControl1.Refresh();
/////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////

//get the custom property from which is supposed to be the layer to be saved
object customProperty = null;
//IMapControl3 mapControl = null;
customProperty = axMapControl1.CustomProperty;

//ask the user to set a name for the new layer file
SaveFileDialog saveFileDialog = new SaveFileDialog();
saveFileDialog.Filter = "Layer File|*.lyr|All Files|*.*";
saveFileDialog.Title = "生成专题图";
saveFileDialog.RestoreDirectory = true;
saveFileDialog.FileName = System.IO.Path.Combine(saveFileDialog.InitialDirectory, pGeoFeatureLayer.Name + ".lyr");

//get the layer name from the user
DialogResult dr = saveFileDialog.ShowDialog();
if (saveFileDialog.FileName != "" && dr == DialogResult.OK)
{
if (System.IO.File.Exists(saveFileDialog.FileName))
{
//try to delete the existing file
System.IO.File.Delete(saveFileDialog.FileName);
}

//create a new LayerFile instance
ILayerFile layerFile = new LayerFileClass();
//create a new layer file
layerFile.New(saveFileDialog.FileName);
//attach the layer file with the actual layer
layerFile.ReplaceContents((ILayer)pGeoFeatureLayer);
//save the layer file
layerFile.Save();

//ask the user whether he'd like to add the layer to the map
if (DialogResult.Yes == MessageBox.Show("Would you like to add the layer to the map?", "Message", MessageBoxButtons.YesNo, MessageBoxIcon.Question))
{
axMapControl1.AddLayerFromFile(saveFileDialog.FileName, 0);
}
}

}

private void 单值图ToolStripMenuItem1_Click(object sender, EventArgs e)
{
//获取当前图层 ，并把它设置成IGeoFeatureLayer的实例
IMap pMap = axMapControl1.Map;
ILayer pLayer = pMap.get_Layer(0) as IFeatureLayer;
IFeatureLayer pFeatureLayer = pLayer as IFeatureLayer;
IGeoFeatureLayer pGeoFeatureLayer = pLayer as IGeoFeatureLayer;

//获取图层上的feature
IFeatureClass pFeatureClass = pFeatureLayer.FeatureClass;

IFeatureCursor pFeatureCursor = pFeatureClass.Search(null, false);

//定义单值图渲染组件
IUniqueValueRenderer pUniqueValueRenderer = new UniqueValueRendererClass();
//设置渲染字段对象
pUniqueValueRenderer.FieldCount = 1;
pUniqueValueRenderer.set_Field(0, "ID");
//创建填充符号
ISimpleFillSymbol PFillSymbol = new SimpleFillSymbolClass();
pUniqueValueRenderer.DefaultSymbol = (ISymbol)PFillSymbol;
pUniqueValueRenderer.UseDefaultSymbol = false;

//QI the table from the geoFeatureLayer and get the field number of
ITable pTable;
int fieldNumber;
pTable = pGeoFeatureLayer as ITable ;
fieldNumber = pTable.FindField("ID");
if (fieldNumber == -1)
{
MessageBox.Show("Can't find field called ", "Message", MessageBoxButtons.OK, MessageBoxIcon.Information);

}

//创建并设置随机色谱
IRandomColorRamp pColorRamp = new RandomColorRampClass();
pColorRamp.StartHue = 0;
pColorRamp.MinValue = 99;
pColorRamp.MinSaturation = 15;
pColorRamp.EndHue = 360;
pColorRamp.MaxValue = 100;
pColorRamp.MaxSaturation = 30;
pColorRamp.Size = 100;
//pColorRamp.Size = pUniqueValueRenderer.ValueCount;
bool ok = true;
pColorRamp.CreateRamp(out ok);
IEnumColors pEnumRamp;
pEnumRamp = pColorRamp.Colors;

//为每个值设置一个符号
int n = pFeatureClass.FeatureCount(null);
for (int i = 0; i < n; i++)
{
IFeature pFeature = pFeatureCursor.NextFeature();
IClone pSourceClone = PFillSymbol as IClone;
ISimpleFillSymbol pSimpleFillSymbol = pSourceClone.Clone() as ISimpleFillSymbol ;
string pFeatureValue = pFeature.get_Value(pFeature.Fields.FindField("ID")).ToString();
pUniqueValueRenderer.AddValue(pFeatureValue, "烈度", (ISymbol)pSimpleFillSymbol);
}
//为每个符号设置颜色
for (int i = 0; i <= pUniqueValueRenderer.ValueCount - 1; i++)
{
string xv = pUniqueValueRenderer.get_Value(i);
if (xv != "")
{
ISimpleFillSymbol pNextSymbol = (ISimpleFillSymbol)pUniqueValueRenderer.get_Symbol(xv);
pNextSymbol.Color = pEnumRamp.Next();
pUniqueValueRenderer.set_Symbol(xv, (ISymbol)pNextSymbol);

}
}
//将单值图渲染对象与渲染图层挂钩
pGeoFeatureLayer.Renderer = (IFeatureRenderer)pUniqueValueRenderer;
pGeoFeatureLayer.DisplayField = "ID";
//刷新地图和TOOCotrol
IActiveView pActiveView = axMapControl1.Map as IActiveView;
pActiveView.Refresh();
axTOCControl1.Update();

}
private void 等级图ToolStripMenuItem_Click(object sender, EventArgs e)
{

//获取当前图层 ，并把它设置成IGeoFeatureLayer的实例
IMap pMap = axMapControl1.Map;
ILayer pLayer = pMap.get_Layer(0) as IFeatureLayer;
IFeatureLayer pFeatureLayer = pLayer as IFeatureLayer;
IGeoFeatureLayer pGeoFeatureLayer = pLayer as IGeoFeatureLayer;

//获取图层上的feature
IFeatureClass pFeatureClass = pFeatureLayer.FeatureClass;
IFeatureCursor pFeatureCursor = pFeatureClass.Search(null, false);
IFeature pFeature = pFeatureCursor.NextFeature();
//////////////////////////////////////////////////////////////////////

//定义所需的接口对象和相关变量

IClassBreaksUIProperties pUIProperties;
object dataValues;
object dataFrequency;
//double[] cb;

int breakIndex;
long ClassesCount;
int numClass;
numClass = 10;
double[] Classes;
//////////////////////////////////////////////////////////////////////
/* We're going to retrie