ArcEngine唯一值着色再开发！

　　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

posted @ 2012-07-26 11:15  太一吾鱼水  阅读(1062)  评论(2)  编辑  收藏  举报