private ISymbol GetSymbol(IColor pColor)
{
ISymbol pSymbol;
ISimpleFillSymbol pSymbolFillSymbol = new SimpleFillSymbolClass();
pSymbolFillSymbol.Color = pColor;
pSymbolFillSymbol.Outline.Width = 0.4;
pSymbol = pSymbolFillSymbol as ISymbol;
return pSymbol;
}
private IRandomColorRamp GetColorRamp(int size)
{
IRandomColorRamp pRandomColorRamp = new RandomColorRampClass();
pRandomColorRamp.StartHue = 10;
pRandomColorRamp.EndHue = 300;
pRandomColorRamp.MaxSaturation = 100;
pRandomColorRamp.MinSaturation = 0;
pRandomColorRamp.MaxValue = 100;
pRandomColorRamp.MinValue = 0;
pRandomColorRamp.Size = size;
bool ok = true;
pRandomColorRamp.CreateRamp(out ok);
return pRandomColorRamp;
}
private void barButtonItem4_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
{
IMap pMap = this.axMapControl1.ActiveView.FocusMap;
if (pMap.LayerCount == 0)
{
MessageBox.Show("地图为空,请加载地图!", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
return;
}
IGeoFeatureLayer pGeoLayer = this.axMapControl1.get_Layer(0) as IGeoFeatureLayer;
ITable pTable = pGeoLayer.FeatureClass as ITable;
ICursor pCursor;
IQueryFilter pQueryFilter = new QueryFilter();
pQueryFilter.AddField("OBJECTID");
pCursor = pTable.Search(pQueryFilter, true);//获取字段
IEnumerator pEnumreator;
//获取字段中各要素属性唯一值
IDataStatistics pDataStatistics = new DataStatisticsClass();
pDataStatistics.Field = "OBJECTID";//获取统计字段
pDataStatistics.Cursor = pCursor;
pEnumreator = pDataStatistics.UniqueValues;
int fieldcount = pDataStatistics.UniqueValueCount;//唯一值个数,以此确定颜色带范围
IUniqueValueRenderer pUniqueValueR = new UniqueValueRendererClass();
pUniqueValueR.FieldCount = 1;//单值渲染
pUniqueValueR.set_Field(0, "OBJECTID");//渲染字段
IEnumColors pEnumColor = GetColorRamp(fieldcount).Colors;
pEnumColor.Reset();
while (pEnumreator.MoveNext())
{
string value = pEnumreator.Current.ToString();
if (value != null)
{
IColor pColor = pEnumColor.Next();
ISymbol pSymbol = GetSymbol(pColor);
pUniqueValueR.AddValue(value, "OBJECTID", pSymbol);
//pUniqueValueR.set_Symbol(value, pSymbol);
}
}
pGeoLayer.Renderer = pUniqueValueR as IFeatureRenderer;
this.axMapControl1.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeography, null, null);
this.axTOCControl1.Update();
}
}
{
ISymbol pSymbol;
ISimpleFillSymbol pSymbolFillSymbol = new SimpleFillSymbolClass();
pSymbolFillSymbol.Color = pColor;
pSymbolFillSymbol.Outline.Width = 0.4;
pSymbol = pSymbolFillSymbol as ISymbol;
return pSymbol;
}
private IRandomColorRamp GetColorRamp(int size)
{
IRandomColorRamp pRandomColorRamp = new RandomColorRampClass();
pRandomColorRamp.StartHue = 10;
pRandomColorRamp.EndHue = 300;
pRandomColorRamp.MaxSaturation = 100;
pRandomColorRamp.MinSaturation = 0;
pRandomColorRamp.MaxValue = 100;
pRandomColorRamp.MinValue = 0;
pRandomColorRamp.Size = size;
bool ok = true;
pRandomColorRamp.CreateRamp(out ok);
return pRandomColorRamp;
}
private void barButtonItem4_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
{
IMap pMap = this.axMapControl1.ActiveView.FocusMap;
if (pMap.LayerCount == 0)
{
MessageBox.Show("地图为空,请加载地图!", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
return;
}
IGeoFeatureLayer pGeoLayer = this.axMapControl1.get_Layer(0) as IGeoFeatureLayer;
ITable pTable = pGeoLayer.FeatureClass as ITable;
ICursor pCursor;
IQueryFilter pQueryFilter = new QueryFilter();
pQueryFilter.AddField("OBJECTID");
pCursor = pTable.Search(pQueryFilter, true);//获取字段
IEnumerator pEnumreator;
//获取字段中各要素属性唯一值
IDataStatistics pDataStatistics = new DataStatisticsClass();
pDataStatistics.Field = "OBJECTID";//获取统计字段
pDataStatistics.Cursor = pCursor;
pEnumreator = pDataStatistics.UniqueValues;
int fieldcount = pDataStatistics.UniqueValueCount;//唯一值个数,以此确定颜色带范围
IUniqueValueRenderer pUniqueValueR = new UniqueValueRendererClass();
pUniqueValueR.FieldCount = 1;//单值渲染
pUniqueValueR.set_Field(0, "OBJECTID");//渲染字段
IEnumColors pEnumColor = GetColorRamp(fieldcount).Colors;
pEnumColor.Reset();
while (pEnumreator.MoveNext())
{
string value = pEnumreator.Current.ToString();
if (value != null)
{
IColor pColor = pEnumColor.Next();
ISymbol pSymbol = GetSymbol(pColor);
pUniqueValueR.AddValue(value, "OBJECTID", pSymbol);
//pUniqueValueR.set_Symbol(value, pSymbol);
}
}
pGeoLayer.Renderer = pUniqueValueR as IFeatureRenderer;
this.axMapControl1.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeography, null, null);
this.axTOCControl1.Update();
}
}