有些工作看似简单，其实真正做起来还是需要很花一些功夫的！别人开发了唯一值着色程序，本想拿来用无奈做的实在没有办法满足要求，所以只好自己开发。不多言，先上截图：
这里做了一个颜色显示控件ColorRampComboBox，主要可以返回色带的起始颜色FromColor和ToColor。还定义了一个事件和属性SelectedIndex；
ColorRampComboBox
1 using System; 2 using System.Drawing; 3 using System.Windows.Forms; 4 using System.Drawing.Drawing2D; 5 6 namespace GeoLibert 7 { 8 public partial class ColorRampComboBox : UserControl 9 { 10 public ColorRampComboBox() 11 { 12 InitializeComponent(); 13 PersonalizeComponent(); 14 } 15 private Color _FromColor; 16 private Color _ToColor; 17 public Color FromColor 18 { 19 20 get { return _FromColor; } 21 set { _FromColor = value; } 22 } 23 public Color ToColor 24 { 25 get { return _ToColor; } 26 27 set { _ToColor = value; } 28 29 } 30 int selectIndex = -1; 31 32 public int SelectedIndex 33 { 34 get { return selectIndex; } 35 set 36 { 37 selectIndex = value; 38 comboBox1.SelectedIndex = selectIndex; 39 } 40 } 41 42 public event EventHandler SelectColorChanged; 43 //预定义的渐变色 44 private static string[] colorList = 45 { 46 "Black|White","White|Black","Red|Blue", 47 "Red|Green","Blue|Green", 48 "Aqua|Aquamarine","Azure|Beige", 49 "Bisque|Black","BlanchedAlmond|Blue","BlueViolet|Brown", 50 "BurlyWood|CadetBlue","Chartreuse|Chocolate", 51 "CornflowerBlue|Cornsilk","Crimson|Cyan","DarkBlue|DarkCyan", 52 "DarkGoldenrod|DarkGray","DarkGreen|DarkKhaki", 53 "DarkMagenta|DarkOliveGreen","DarkOrange|DarkOrchid" 54 55 }; 56 private void PersonalizeComponent() 57 58 { 59 this.comboBox1.DrawMode = DrawMode.OwnerDrawFixed; 60 this.comboBox1.DropDownStyle = ComboBoxStyle.DropDownList; 61 this.comboBox1.ItemHeight = 18; 62 this.comboBox1.BeginUpdate(); 63 this.comboBox1.Items.Clear(); 64 foreach (string oneColor in colorList) 65 { 66 this.comboBox1.Items.Add(oneColor); 67 } 68 this.comboBox1.EndUpdate(); 69 70 } 71 private void comboBox1_DrawItem(object sender, DrawItemEventArgs e) 72 { 73 if (e.Index < 0) 74 return; 75 Rectangle rect = e.Bounds; 76 //读取起始、终止颜色值 77 string fColorName = comboBox1.Items[e.Index].ToString().Split('|')[0]; 78 string tColorName = comboBox1.Items[e.Index].ToString().Split('|')[1]; 79 _FromColor = Color.FromName(fColorName); 80 _ToColor = Color.FromName(tColorName); 81 //选择线性渐变刷子 82 LinearGradientBrush brush = new LinearGradientBrush(rect, _FromColor, _ToColor, 0, false); 83 rect.Inflate(-1, -1); 84 // 填充颜色 85 e.Graphics.FillRectangle(brush, rect); 86 // 绘制边框 87 e.Graphics.DrawRectangle(Pens.Black, rect); 88 } 89 private void comboBox1_SelectedIndexChanged(object sender, EventArgs e) 90 { 91 selectIndex = comboBox1.SelectedIndex; 92 if (SelectColorChanged != null) 93 { 94 SelectColorChanged(this, e); 95 } 96 } 97 98 } 99 }
下面是部分唯一值着色程序代码，
程序逻辑：选择图层，选择字段，选择色带，获取唯一值时根据字段和色带创建Bitmap，添加相应的ListView项；
根据已有的字段（UniqueRenderer），改变色带是，修改其符号颜色。
View Code
1 namespace GeoLibert 2 { 3 public partial class frmUniqueRenderer : Form 4 { 5 public frmUniqueRenderer() 6 { 7 InitializeComponent(); 8 } 9 ISceneControl m_SceneCtrl = null; 10 public ISceneControl SceneCtrl 11 { 12 get { return m_SceneCtrl; } 13 set { m_SceneCtrl = value; } 14 } 15 IFeatureLayer pCurrentLyr = null;//当前图层 16 IUniqueValueRenderer pUniqueValueR = null; 17 IStyleGalleryClass pStyleGalleryClass = null; 18 esriGeometryType m_strShapeType;//当前图层类型 19 private void frmUniqueRenderer_Load(object sender, EventArgs e) 20 { 21 //加载图层 22 if (m_SceneCtrl == null) 23 {return;} 24 ESRI.ArcGIS.esriSystem.IUID uid = new ESRI.ArcGIS.esriSystem.UIDClass(); 25 uid.Value = "{40A9E885-5533-11D0-98BE-00805F7CED21}"; 26 IScene map = m_SceneCtrl.Scene; 27 if (map.LayerCount == 0) { return; } 28 IEnumLayer enumLyr = map.get_Layers((ESRI.ArcGIS.esriSystem.UID)uid, true); 29 enumLyr.Reset(); 30 ILayer layer = enumLyr.Next(); 31 while (layer != null) 32 { 33 IFeatureLayer featlyr = layer as IFeatureLayer; 34 cmbChooseLayer.Items.Add(featlyr.Name); 35 layer = enumLyr.Next(); 36 } 37 colorRampComboBox1.SelectedIndex = 0;//选择第一个色带 38 cmbChooseLayer.SelectedIndex = 0;//默认选择第一个图层 39 listView1.SmallImageList = imageList2; 40 listView1.LargeImageList = imageList2; 41 listView1.View = View.Details; 42 //InitServerStyleFile(styleFilename); 43 int columnWidth = listView1.Width / 4; 44 listView1.Columns.Add("符号", columnWidth, HorizontalAlignment.Left); 45 listView1.Columns.Add("字段值", columnWidth, HorizontalAlignment.Left); 46 listView1.Columns.Add("标注", columnWidth, HorizontalAlignment.Left); 47 48 } 49 private void cmbChooseLayer_SelectedIndexChanged(object sender, EventArgs e) 50 { 51 pCurrentLyr = GetFeatureLayerFromMapLyr(cmbChooseLayer.SelectedIndex); 52 m_strShapeType = pCurrentLyr.FeatureClass.ShapeType;// 53 IFeatureClass featcls = pCurrentLyr.FeatureClass; 54 IFields pFields = featcls.Fields; 55 for (int i = 0; i < pFields.FieldCount;i++ ) 56 { 57 IField pfield=pFields.get_Field(i); 58 if (pfield.Type!=esriFieldType.esriFieldTypeGeometry) 59 { 60 combFields.Items.Add(pfield.Name); 61 } 62 } 63 IGeoFeatureLayer pGeoFeatureLayer = pCurrentLyr as IGeoFeatureLayer; 64 IFeatureRenderer pFeatureRenderer = pGeoFeatureLayer.Renderer; 65 //判断当前图层类型，构建IStyleGalleryClass 66 switch (featcls.ShapeType) 67 { 68 case ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPoint: 69 pStyleGalleryClass = new MarkerSymbolStyleGalleryClassClass(); 70 break; 71 case ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPolyline: 72 pStyleGalleryClass = new LineSymbolStyleGalleryClassClass(); 73 break; 74 case ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPolygon: 75 pStyleGalleryClass = new FillSymbolStyleGalleryClassClass(); 76 break; 77 case ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryMultiPatch: 78 pStyleGalleryClass = new FillSymbolStyleGalleryClassClass(); 79 break; 80 default: 81 break; 82 } 83 listView1.Items.Clear(); 84 imageList2.Images.Clear(); 85 if (pFeatureRenderer is ISimpleRenderer) 86 { 87 ISimpleRenderer pSimpleRenderer = pFeatureRenderer as ISimpleRenderer; 88 ISymbol pSymbol = pSimpleRenderer.Symbol; 89 Bitmap bitmap = PreviewSymbol(pStyleGalleryClass, pSymbol, imageList2.ImageSize.Width, imageList2.ImageSize.Height); 90 imageList2.Images.Add(bitmap as Image); 91 ListViewItem listviewitem1 = new ListViewItem(new string[] { " ", "默认值","默认值" }, 0); 92 listView1.Items.Add(listviewitem1); 93 } 94 else if (pFeatureRenderer is IUniqueValueRenderer) 95 { 96 pUniqueValueR = new UniqueValueRendererClass();//构建新的唯一值着色类 97 IUniqueValueRenderer pUnique = pFeatureRenderer as IUniqueValueRenderer; 98 99 IObjectCopy objCopy = new ObjectCopyClass(); 100 object copiedUniqueVR = objCopy.Copy(pUnique); 101 object toUniqueVR = pUniqueValueR; 102 objCopy.Overwrite(copiedUniqueVR, ref toUniqueVR); 103 ISymbol pSymbolDefault = pUniqueValueR.DefaultSymbol; 104 if (pSymbolDefault!=null) 105 { 106 Bitmap bitmap = PreviewSymbol(pStyleGalleryClass, pSymbolDefault, imageList2.ImageSize.Width, imageList2.ImageSize.Height); 107 imageList2.Images.Add(bitmap as Image); 108 ListViewItem listviewitem0 = new ListViewItem(); 109 listviewitem0.SubItems.Add("默认值"); 110 listviewitem0.SubItems.Add("默认值"); 111 listviewitem0.ImageIndex = 0; 112 listView1.Items.Add(listviewitem0); 113 } 114 string strfield = pUniqueValueR.get_Field(0); 115 IFeatureClass pCurrentFeatCls = pCurrentLyr.FeatureClass; 116 int idx = -1; 117 for (int i = 0; i < pFields.FieldCount; i++) 118 { 119 IField pfield = pFields.get_Field(i); 120 if (pfield.Type != esriFieldType.esriFieldTypeGeometry) 121 { 122 idx++; 123 if (pfield.Name==strfield) 124 { 125 combFields.SelectedIndex = idx; 126 } 127 } 128 } 129 if (idx!=-1) 130 { 131 isGetAllValue = true; 132 recordNum = pUniqueValueR.ValueCount; 133 } 134 for (int i = 0; i < pUniqueValueR.ValueCount; i++) 135 { 136 string strValue = pUniqueValueR.get_Value(i); 137 ISymbol pSymbol1 = pUniqueValueR.get_Symbol(strValue); 138 139 Bitmap bitmap1 = PreviewSymbol(pStyleGalleryClass, pSymbol1, imageList2.ImageSize.Width, imageList2.ImageSize.Height); 140 imageList2.Images.Add(bitmap1 as Image); 141 ListViewItem listviewitem1 = new ListViewItem(); 142 listviewitem1.SubItems.Add(strValue); 143 listviewitem1.SubItems.Add(strValue); 144 listviewitem1.ImageIndex = i + 1; 145 listView1.Items.Add(listviewitem1); 146 } 147 148 } 149 } 150 Bitmap PreviewSymbol(IStyleGalleryClass pStyleGalleryClass, object galleryItem, int imgWidth, int imgHeight) 151 { 152 Bitmap bitmap = new Bitmap(imgWidth, imgHeight); 153 Graphics graphics = Graphics.FromImage(bitmap); 154 tagRECT rect = new tagRECT(); 155 rect.right = bitmap.Width; 156 rect.bottom = bitmap.Height; 157 System.IntPtr hdc = graphics.GetHdc(); 158 159 pStyleGalleryClass.Preview(galleryItem, hdc.ToInt32(), ref rect); 160 graphics.ReleaseHdc(hdc); 161 graphics.Dispose(); 162 return bitmap; 163 } 164 //从地图图层中获得特征类数据图层 165 private IFeatureLayer GetFeatureLayerFromMapLyr(int selectidx) 166 { 167 //AxSceneControl axScene= pMainFrm.axSceneControl1; 168 IFeatureLayer featlyr = null; 169 170 ESRI.ArcGIS.esriSystem.IUID uid = new ESRI.ArcGIS.esriSystem.UIDClass(); 171 uid.Value = "{40A9E885-5533-11D0-98BE-00805F7CED21}"; 172 IScene scene = m_SceneCtrl.Scene; 173 IEnumLayer enumLyr = scene.get_Layers((ESRI.ArcGIS.esriSystem.UID)uid, true); 174 enumLyr.Reset(); 175 ILayer layer = enumLyr.Next(); 176 int i = 0; 177 while (layer != null) 178 { 179 180 if (i == selectidx) 181 { 182 featlyr = layer as IFeatureLayer; 183 break; 184 } 185 i++; 186 layer = enumLyr.Next(); 187 } 188 return featlyr; 189 } 190 191 //书写颜色转换函数，从.NET颜色转换为esri的颜色 192 private IColor ConvertColorToColor(Color color) 193 { 194 IRgbColor pColor = new RgbColorClass(); 195 pColor.RGB = color.B * 65536 + color.G * 256 + color.R; 196 return pColor; 197 } 198 199 private void colorRampComboBox1_SelectColorChanged(object sender, EventArgs e) 200 { 201 202 if (isGetAllValue && recordNum > 0) 203 { 204 Color fromColor = colorRampComboBox1.FromColor; 205 Color toColor = colorRampComboBox1.ToColor; 206 IColorRamp pColorRamp = null; 207 IAlgorithmicColorRamp pAlgorithmColorRamp = new AlgorithmicColorRamp(); 208 pAlgorithmColorRamp.ToColor = this.ConvertColorToColor(toColor); 209 pAlgorithmColorRamp.FromColor = this.ConvertColorToColor(fromColor); 210 //设置梯度类型 211 pAlgorithmColorRamp.Algorithm = esriColorRampAlgorithm.esriHSVAlgorithm; 212 //设置颜色带颜色数量 213 //////任意产生recordNum个颜色，recordNum就是要素的数目 214 pAlgorithmColorRamp.Size = recordNum+1; 215 //创建颜色带 216 bool bTrue = true; 217 pAlgorithmColorRamp.CreateRamp(out bTrue); 218 pColorRamp = pAlgorithmColorRamp as IColorRamp; 219 220 listView1.Items.Clear(); 221 imageList2.Images.Clear(); 222 ISymbol pSymbol0 = pUniqueValueR.DefaultSymbol; 223 Bitmap bitmap0 = PreviewSymbol(pStyleGalleryClass, pSymbol0, imageList2.ImageSize.Width, imageList2.ImageSize.Height); 224 Image image0 = bitmap0; 225 imageList2.Images.Add(image0); 226 ListViewItem lv0 = new ListViewItem(new string[] { " ", "默认值", "默认值"}, 0); 227 listView1.Items.Add(lv0); 228 IEnumColors pEnumRamp = pColorRamp.Colors; 229 for (int i = 0; i < pUniqueValueR.ValueCount; i++) 230 { 231 232 IColor pNextUniqueColor = null; 233 //获得随机颜色带中的任意一种颜色 234 pNextUniqueColor = pEnumRamp.Next(); 235 if (pNextUniqueColor == null) 236 { 237 pEnumRamp.Reset(); 238 pNextUniqueColor = pEnumRamp.Next(); 239 } 240 ISymbol addSymbol = GetSymbolByShpType(m_strShapeType, pNextUniqueColor); 241 string strValue = pUniqueValueR.get_Value(i); 242 pUniqueValueR.set_Symbol(strValue, addSymbol); 243 Bitmap bitmap = PreviewSymbol(pStyleGalleryClass, addSymbol, imageList2.ImageSize.Width, imageList2.ImageSize.Height); 244 Image image = bitmap; 245 imageList2.Images.Add(image); 246 listView1.SmallImageList = imageList2; 247 ListViewItem lv = new ListViewItem(new string[] { " ", strValue, strValue}, i+1); 248 listView1.Items.Add(lv); 249 250 } 251 } 252 253 } 254 255 private void btnOK_Click(object sender, EventArgs e) 256 { 257 IGeoFeatureLayer m_pGeoFeatureL = (IGeoFeatureLayer)pCurrentLyr; 258 m_pGeoFeatureL.Renderer = (IFeatureRenderer)pUniqueValueR; 259 m_SceneCtrl.SceneGraph.Invalidate(pCurrentLyr, true, false); 260 m_SceneCtrl.SceneViewer.Redraw(true); 261 m_SceneCtrl.SceneGraph.RefreshViewers(); 262 this.DialogResult = DialogResult.OK; 263 264 } 265 private void btnCancel_Click(object sender, EventArgs e) 266 { 267 this.DialogResult = DialogResult.Cancel; 268 } 269 bool isGetAllValue = false; 270 int recordNum = 0;//找出该图层的记录数 271 private void btnGetUniqueValue_Click(object sender, EventArgs e) 272 { 273 if (isGetAllValue == false) 274 { 275 isGetAllValue = true; 276 IGeoFeatureLayer m_pGeoFeatureL = (IGeoFeatureLayer)pCurrentLyr; 277 278 string LayerFieldName = combFields.Text; 279 pUniqueValueR = new UniqueValueRendererClass(); 280 IColor colr = GetRGB(238,223,155); 281 pUniqueValueR.DefaultSymbol = GetSymbolByShpType(m_strShapeType, colr); 282 pUniqueValueR.UseDefaultSymbol = false; 283 ITable pTable = (ITable)m_pGeoFeatureL; 284 ////////找出LayerFieldName在字段中的编号 285 int lfieldNumber = pTable.FindField(combFields.Text); 286 if (lfieldNumber == -1) 287 { 288 MessageBox.Show("无法找到字段" + LayerFieldName); 289 return; 290 } 291 /////只用一个字段进行单值着色 292 pUniqueValueR.FieldCount = 1; 293 /////用于区分着色的字段 294 pUniqueValueR.set_Field(0, LayerFieldName); 295 //产生查询过滤器 296 IQueryFilter pQueryFilter = new QueryFilterClass(); 297 pQueryFilter.AddField(LayerFieldName); 298 ////依据某个字段在表中找出指向所有行的游标对象 299 ICursor pNumCursor = pTable.Search(pQueryFilter, true); 300 301 System.Collections.IEnumerator enumerator; 302 IDataStatistics DS = new DataStatisticsClass(); 303 DS.Field = LayerFieldName;//设置唯一值字段 304 DS.Cursor = pNumCursor;//数据来源 305 enumerator = DS.UniqueValues;//得到唯一值 306 recordNum = DS.UniqueValueCount; 307 //ZS = Convert.ToString(DS.UniqueValueCount); 308 enumerator.Reset();//从新指向第一个值 309 310 Color fromColor = colorRampComboBox1.FromColor; 311 Color toColor = colorRampComboBox1.ToColor; 312 IColorRamp pColorRamp = null; 313 IAlgorithmicColorRamp pAlgorithmColorRamp = new AlgorithmicColorRamp(); 314 pAlgorithmColorRamp.ToColor = this.ConvertColorToColor(toColor); 315 pAlgorithmColorRamp.FromColor = this.ConvertColorToColor(fromColor); 316 //设置梯度类型 317 pAlgorithmColorRamp.Algorithm = esriColorRampAlgorithm.esriHSVAlgorithm; 318 //设置颜色带颜色数量 319 //////任意产生recordNum个颜色，recordNum就是要素的数目 320 pAlgorithmColorRamp.Size = recordNum+1; 321 //创建颜色带 322 bool bTrue = true; 323 pAlgorithmColorRamp.CreateRamp(out bTrue); 324 pColorRamp = pAlgorithmColorRamp as IColorRamp; 325 IEnumColors pEnumRamp = pColorRamp.Colors; 326 IColor pNextUniqueColor = null; 327 328 /////遍历所有的要素 329 while (enumerator.MoveNext())//pNextRow!=null 330 { 331 object fieldValue; 332 fieldValue = enumerator.Current; 333 string codeValue = fieldValue.ToString(); 334 //获得随机颜色带中的任意一种颜色 335 pNextUniqueColor = pEnumRamp.Next(); 336 if (pNextUniqueColor == null) 337 { 338 pEnumRamp.Reset(); 339 pNextUniqueColor = pEnumRamp.Next(); 340 } 341 ISymbol addSymbol = GetSymbolByShpType(m_strShapeType, pNextUniqueColor); 342 pUniqueValueR.AddValue(codeValue, LayerFieldName, addSymbol); 343 } 344 listView1.Items.Clear(); 345 imageList2.Images.Clear(); 346 ISymbol pSymbol0 = pUniqueValueR.DefaultSymbol; 347 Bitmap bitmap0 = PreviewSymbol(pStyleGalleryClass, pSymbol0, imageList2.ImageSize.Width, imageList2.ImageSize.Height); 348 Image image0 = bitmap0; 349 imageList2.Images.Add(image0); 350 ListViewItem lv0 = new ListViewItem(new string[] { " ", "默认值", "默认值" }, 0); 351 listView1.Items.Add(lv0); 352 for (int i = 0; i < pUniqueValueR.ValueCount; i++) 353 { 354 string strValue = pUniqueValueR.get_Value(i); 355 ISymbol pSymbol = pUniqueValueR.get_Symbol(strValue); 356 Bitmap bitmap = PreviewSymbol(pStyleGalleryClass, pSymbol, imageList2.ImageSize.Width, imageList2.ImageSize.Height); 357 Image image = bitmap; 358 imageList2.Images.Add(image); 359 listView1.SmallImageList = imageList2; 360 ListViewItem lv = new ListViewItem(new string[] { " ", strValue, strValue}, i+1); 361 listView1.Items.Add(lv); 362 363 } 364 } 365 366 } 367 public ISymbol GetSymbolByShpType(esriGeometryType strShpType, IColor fillColor) 368 { 369 ISymbol returnSyb = null; 370 IFillSymbol pFillSymbol; 371 ILineSymbol pLineSymbol; 372 //设置背景符号 373 if (strShpType == esriGeometryType.esriGeometryPolygon) 374 { 375 pFillSymbol = new SimpleFillSymbolClass(); 376 pFillSymbol.Color = fillColor; 377 pLineSymbol = new SimpleLineSymbolClass(); 378 pLineSymbol.Color =ConvertColorToColor(Color.Black); 379 pLineSymbol.Width = 1;//outLineWid; 380 pFillSymbol.Outline = pLineSymbol; 381 returnSyb = (ISymbol)pFillSymbol; 382 } 383 if (strShpType == esriGeometryType.esriGeometryPolyline) 384 { 385 ILineSymbol pLineBaseSymbol; 386 pLineBaseSymbol = new SimpleLineSymbolClass(); 387 pLineBaseSymbol.Color = fillColor; 388 returnSyb = (ISymbol)pLineBaseSymbol; 389 } 390 if (strShpType == esriGeometryType.esriGeometryPoint) 391 { 392 IMarkerSymbol pMarkerBaseSymbol; 393 pMarkerBaseSymbol = new SimpleMarkerSymbolClass(); 394 pMarkerBaseSymbol.Color = fillColor; 395 pMarkerBaseSymbol.Size = 4; 396 returnSyb = (ISymbol)pMarkerBaseSymbol; 397 } 398 if (strShpType == esriGeometryType.esriGeometryMultiPatch) 399 { 400 pFillSymbol = new SimpleFillSymbolClass(); 401 pFillSymbol.Color = fillColor; 402 pLineSymbol = new SimpleLineSymbolClass(); 403 pLineSymbol.Color = ConvertColorToColor(Color.Black); 404 pLineSymbol.Width = 1;//outLineWid; 405 pFillSymbol.Outline = pLineSymbol; 406 returnSyb = (ISymbol)pFillSymbol; 407 } 408 return returnSyb; 409 } 410 411 private IColor GetRGB(int r, int g, int b) 412 { 413 IRgbColor pColor; 414 pColor = new RgbColorClass(); 415 pColor.Red = r; 416 pColor.Green = g; 417 pColor.Blue = b; 418 return pColor; 419 } 420 421 private void btnRemoveAllValue_Click(object sender, EventArgs e) 422 { 423 pUniqueValueR.RemoveAllValues(); 424 isGetAllValue = false; 425 listView1.Items.Clear(); 426 imageList2.Images.Clear(); 427 ISymbol pSymbol0 = pUniqueValueR.DefaultSymbol; 428 Bitmap bitmap0 = PreviewSymbol(pStyleGalleryClass, pSymbol0, imageList2.ImageSize.Width, imageList2.ImageSize.Height); 429 Image image0 = bitmap0; 430 imageList2.Images.Add(image0); 431 ListViewItem lv0 = new ListViewItem(new string[] { " ", "默认值", "默认值" }, 0); 432 listView1.Items.Add(lv0); 433 } 434 435 private void combFields_SelectedIndexChanged(object sender, EventArgs e) 436 { 437 isGetAllValue = false; 438 } 439 } 440 441 }
该程序还没有实现双击改变某一个符号的功能，不过应该不难，只需要修改pUniqueRenderer，Set_Symbol(I)就行了！
参考文献：1.自定义ComboBox显示色带：http://blog.sina.com.cn/s/blog_86d10dc7010166i7.html