此文是用.NET Iobject 7c 下利用vs2010开发的winform版 单值专题图的创建及色带的修改。在此记下来以便后期参考（可能很快就会被淹没，超图的更新换代很快）
初期由于不知道样式的承载控件应该选择那个，测试过listview、listbox，但是效果都不满意，偶然间查到datagridview可以更好的充当这个角色，展示效果做好肯定就要配套的修改功能了，这个修改我咨询过客服，客服说在修改方面，只是给了一个样式修改的接口，我测试过对修改对象进行清空，赋值都不行，对象和地图展示的关联较强；
在测试中发现，若是对专题图对象删除再次添加，所添加的名称和删除图层的名称保持不变，最后只能曲线的进行对图层的删除和重新添加，
----》 第一个窗体为主窗体展示，最后一个窗体为增删值做准备
说明：1 下拉框根据单值的条件筛选填入字段名称
2 承载数据的控件时datagridview，需要把该控件的列指定特定的值 如图 2
3 按钮--添加所有值就是重新根据条件进行读取一次数据并展示出来
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using SuperMap.Mapping; using SuperMap.Data; using SuperMap.UI; using soTest.ThematicMap; namespace SuperMap.SampleCode.Mapping { public partial class frmThemeUnique : Form { Workspace m_workspace; List<ColorGradientType> setColorTheml = null; Dataset objLayer = null; ThemeUnique objThemeUnique = null; MapControl objMapControl = null; public frmThemeUnique(Workspace m_workspace, Dataset layer, ThemeUnique objThemeUnique,MapControl objMapControl) { InitializeComponent(); this.m_workspace = m_workspace; this.objLayer = layer; this.objThemeUnique = objThemeUnique; this.objMapControl = objMapControl; dataGridView2.CellMouseClick += new DataGridViewCellMouseEventHandler(dataGridView2_CellMouseClick); dataGridView2.CellMouseDoubleClick += new DataGridViewCellMouseEventHandler(dataGridView2_CellMouseDoubleClick); } /// <summary> /// 窗体加载事件 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void frmThemeUnique_Load(object sender, EventArgs e) { resources = m_workspace.Resources; // string path = Application.StartupPath.Substring(0, Application.StartupPath.LastIndexOf("CurExe")); //设置单值专题图数值 #region MyRegion setColorTheml = new List<ColorGradientType>(); setColorTheml.Add(ColorGradientType.Spectrum); setColorTheml.Add(ColorGradientType.Terrain); setColorTheml.Add(ColorGradientType.GreenOrangeViolet); setColorTheml.Add(ColorGradientType.Rainbow); setColorTheml.Add(ColorGradientType.CyanGreen); setColorTheml.Add(ColorGradientType.CyanBlue); // setColorTheml.Add("青->蓝渐变色", ColorGradientType.PinkBlue); setColorTheml.Add(ColorGradientType.PinkRed); setColorTheml.Add(ColorGradientType.BlueRed); setColorTheml.Add(ColorGradientType.GreenRed); setColorTheml.Add(ColorGradientType.GreenBlue); setColorTheml.Add(ColorGradientType.YellowBlue); setColorTheml.Add(ColorGradientType.YellowGreen); setColorTheml.Add(ColorGradientType.YellowRed); setColorTheml.Add(ColorGradientType.CyanBlack); setColorTheml.Add(ColorGradientType.PinkBlack); setColorTheml.Add(ColorGradientType.YellowBlack); setColorTheml.Add(ColorGradientType.BlueBlack); setColorTheml.Add(ColorGradientType.GreenBlack); setColorTheml.Add(ColorGradientType.RedBlack); setColorTheml.Add(ColorGradientType.CyanWhite); setColorTheml.Add(ColorGradientType.PinkWhite); setColorTheml.Add(ColorGradientType.YellowWhite); setColorTheml.Add(ColorGradientType.BlueWhite); setColorTheml.Add(ColorGradientType.GreenWhite); setColorTheml.Add(ColorGradientType.RedWhite); setColorTheml.Add(ColorGradientType.BlackWhite); #endregion dataGridView2.SelectionMode = DataGridViewSelectionMode.FullRowSelect; dataGridView2.AllowUserToAddRows = false; setDZcombox(); if (objThemeUnique == null) { showDZinformation(); } else { updateThemeUnique(objThemeUnique); } } public void updateThemeUnique(ThemeUnique objThemeUnique) { comboBox1.Text = objThemeUnique.UniqueExpression; for (int i = 0; i < objThemeUnique.Count; i++) { objThemeUniqueItem.Add(objThemeUnique[i]); Image im = getImage(objLayer.Type, objThemeUnique[i].Style); dataGridView2.Rows.Add(true, im, objThemeUnique[i].Caption); } } #region 单值专题图 public void setDZcombox() { DatasetVector objDv = objLayer as DatasetVector; FieldInfos objFled = objDv.FieldInfos; FieldInfo objFd = null; for (int i = 0; i < objFled.Count; i++) { objFd = objFled[i]; comboBox1.Items.Add(objFd.Name.Trim()); } if (comboBox1.Items.Count > 0) comboBox1.SelectedIndex = 0; objFled = null; objDv = null; } // 设置单值专题图 ThemeUnique themeunique = null; DatasetVector datasetVector = null; Geometry objg = null; Resources resources = null; //单只专题图子项集合 List<ThemeUniqueItem> objThemeUniqueItem = new List<ThemeUniqueItem>(); //删除的单值专题图集合 List<ThemeUniqueItem> objDeleteThemeUniqueItem = new List<ThemeUniqueItem>(); List<string> list = new List<string>(); /// <summary> /// 单值绑定方法 /// </summary> public void showDZinformation() { themeunique = new ThemeUnique(); //清空数据 objThemeUniqueItem.Clear(); objDeleteThemeUniqueItem.Clear(); list.Clear(); //专题图清空 themeunique.Clear(); //列表清空 dataGridView2.Rows.Clear(); // 当只有普通图层时，添加专题图层 datasetVector = objLayer as DatasetVector; //设置字段表达式 themeunique.UniqueExpression = comboBox1.Text.Trim(); Recordset objRecor = datasetVector.GetRecordset(false, CursorType.Static); FieldInfos objFled = datasetVector.FieldInfos; objRecor.MoveFirst(); for (int j = 0; j < objRecor.RecordCount; j++) { //新建DataTable的行对象 if (objRecor.FieldCount == objFled.Count) { object value = objRecor.GetFieldValue(comboBox1.SelectedIndex); if (value != null) { if (!string.IsNullOrWhiteSpace(value.ToString().Trim())) { objg = objRecor.GetGeometry(); list.Add(value.ToString().Trim()); } } } else { // MessageBox.Show("字段数有问题！", "提示"); } objRecor.MoveNext();//移到下个列 } //释放对象 objRecor.Dispose(); //专题图子项 ThemeUniqueItem objItem = null; GeoStyle geostyle1 = null; Random objRan = new Random(); // 根据指定的渐变颜色类型，返回一个 Colors 类的对象 //运行结果是根据指定的渐变颜色返回的4个颜色构成的颜色集合，颜色值为: //(R=0,G=255,B=0),(R=0,G=255,B=85),(R=0,G=255,B=170),(R=0,G=255,B=255) Colors colors = Colors.MakeGradient(list.Count, ColorGradientType.BlueBlack, false); // 得到点线面的RootGroup List<string> isTrueAndFalse = new List<string>(); for (int i = 0; i < list.Count; i++) { string itemName = list[i]; objItem = new ThemeUniqueItem(); objItem.Caption = itemName; objItem.IsVisible = true; geostyle1 = GeoStyleSample(objLayer.Type, colors[isTrueAndFalse.Count]);// geostyle1; objItem.Style = geostyle1; objItem.Unique = itemName; if (!isTrueAndFalse.Contains(itemName)) { objThemeUniqueItem.Add(objItem); Image im = getImage(objLayer.Type, geostyle1); dataGridView2.Rows.Add(true, im, itemName); isTrueAndFalse.Add(itemName); } } } /// <summary> /// 单元格单击事件 此事件主要针对专题图的显示和隐藏进行操作 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> void dataGridView2_CellMouseClick(object sender, DataGridViewCellMouseEventArgs e) { if (dataGridView2.Columns[e.ColumnIndex].Name.Equals("checkbox")) { bool value = (bool)dataGridView2.Rows[e.RowIndex].Cells[e.ColumnIndex].Value; if (value) { dataGridView2.Rows[e.RowIndex].Cells[e.ColumnIndex].Value = false; objThemeUniqueItem[e.RowIndex].IsVisible = false; } else { dataGridView2.Rows[e.RowIndex].Cells[e.ColumnIndex].Value = true; objThemeUniqueItem[e.RowIndex].IsVisible = true; } } } /// <summary> /// 单元格双击事件 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> void dataGridView2_CellMouseDoubleClick(object sender, DataGridViewCellMouseEventArgs e) { if (dataGridView2.Columns[e.ColumnIndex].Name.Equals("imgvalue")) { //样式符号 GeoStyle objGeoStyle = SymbolDialog.ShowDialog(m_workspace.Resources, objThemeUniqueItem[e.RowIndex].Style, GetSymbolType(objLayer.Type)); if (objGeoStyle != null) { //更新专题图样式 objThemeUniqueItem[e.RowIndex].Style = objGeoStyle; //更换列表中的图像 if (objLayer.Type == DatasetType.Point) { //获取符号编号 int num = objGeoStyle.MarkerSymbolID; //加载符号库 SymbolLibrary symbolMarkerLibrary = resources.MarkerLibrary; //拟定一个点对象 GeoPoint point = new GeoPoint(5, 5); //获取并赋值对应的点样式 point.Style = objGeoStyle; //从库中查找对应的点符号编号 Symbol symbol = symbolMarkerLibrary.FindSymbol(num); //objThemeUniqueItem[e.RowIndex].Style.SetSymbolMarker(symbol as SymbolMarker); dataGridView2.Rows[e.RowIndex].Cells[e.ColumnIndex].Value = DrawSymbol(symbol, point, 20, 20); } else if (objLayer.Type == DatasetType.Line) { //获取符号编号 int num = objGeoStyle.LineSymbolID; //加载符号库 SymbolLibrary symbolMarkerLibrary = resources.LineLibrary; //拟定一个线对象 Point2Ds point2Ds = new Point2Ds(); point2Ds.Add(new Point2D(0, 5)); point2Ds.Add(new Point2D(15, 5)); GeoLine line = new GeoLine(point2Ds); //获取并赋值对应的点样式 line.Style = objGeoStyle; //从库中查找对应的线符号编号 Symbol symbol = symbolMarkerLibrary.FindSymbol(num); // objThemeUniqueItem[e.RowIndex].Style.SetSymbolLine(symbol as SymbolLine); dataGridView2.Rows[e.RowIndex].Cells[e.ColumnIndex].Value = DrawSymbol(symbol, line, 20, 20); } else if (objLayer.Type == DatasetType.Region) { //获取符号编号 int num = objGeoStyle.FillSymbolID; //加载符号库 SymbolLibrary symbolFillLibrary = resources.FillLibrary; //拟定一个面对象 Point2Ds point2Ds = new Point2Ds(); point2Ds.Add(new Point2D(0, 0)); point2Ds.Add(new Point2D(0, 15)); point2Ds.Add(new Point2D(15, 15)); point2Ds.Add(new Point2D(15, 0)); GeoRegion region = new GeoRegion(point2Ds); //获取并赋值对应的面样式 region.Style = objGeoStyle; //从库中查找对应的点符号编号 Symbol symbol = symbolFillLibrary.FindSymbol(num); //objThemeUniqueItem[e.RowIndex].Style.SetSymbolFill(symbol as SymbolFill); dataGridView2.Rows[e.RowIndex].Cells[e.ColumnIndex].Value = DrawSymbol(symbol, region, 20, 20); } } } } /// <summary> /// 根据数据集类型获取符号库的类型 /// </summary> /// <param name="datasetType">数据集类型</param> /// <returns>返回符号库类型</returns> private SymbolType GetSymbolType(DatasetType datasetType) { SymbolType result = SymbolType.Marker; switch (datasetType) { case DatasetType.Line: { result = SymbolType.Line; } break; case DatasetType.Point: { result = SymbolType.Marker; } break; case DatasetType.Region: { result = SymbolType.Fill; } break; default: break; } return result; } /// <summary> ///获取列表中显示的图片 设置默认值并在列表中显示 /// </summary> /// <param name="P"></param> /// <param name="geostyle1"></param> /// <returns></returns> public Image getImage(DatasetType P, GeoStyle geostyle1) { Image im = null; if (P == DatasetType.Point) { //符号库 SymbolLibrary symbolMarkerLibrary = resources.MarkerLibrary; SymbolGroup m_symbolMarkerRootGroup = symbolMarkerLibrary.RootGroup; GeoPoint point = new GeoPoint(5, 5); point.Style = geostyle1; Symbol symbol = null; if (geostyle1.MarkerSymbolID == null) { symbol = m_symbolMarkerRootGroup[0];//symbolMarkerLibrary.FindSymbol(0);// } else { symbol = m_symbolMarkerRootGroup[geostyle1.MarkerSymbolID]; //symbol = symbolMarkerLibrary.FindSymbol(geostyle1.MarkerSymbolID);//symbolMarkerLibrary.FindSymbol(0);// } im = DrawSymbol(symbol, point, 20, 20); } else if (P == DatasetType.Line) { SymbolLibrary symbolLineLibrary = resources.LineLibrary; SymbolGroup m_symbolLineRootGroup = symbolLineLibrary.RootGroup; Point2Ds point2Ds = new Point2Ds(); point2Ds.Add(new Point2D(0, 5)); point2Ds.Add(new Point2D(15, 5)); GeoLine line = new GeoLine(point2Ds); line.Style = geostyle1; Symbol symbol = null; if (geostyle1.LineSymbolID == null) { symbol = m_symbolLineRootGroup[0];//symbolMarkerLibrary.FindSymbol(0);// } else { symbol = m_symbolLineRootGroup[geostyle1.LineSymbolID]; //symbol = symbolLineLibrary.FindSymbol(geostyle1.LineSymbolID);//symbolMarkerLibrary.FindSymbol(0);// } im = DrawSymbol(symbol, line, 20, 20); } else if (P == DatasetType.Region) { SymbolLibrary symbolFillLibrary = resources.FillLibrary; SymbolGroup m_symbolFillRootGroup = symbolFillLibrary.RootGroup; //构造点对象，由点组成面对象 Point2Ds point2Ds = new Point2Ds(); point2Ds.Add(new Point2D(0, 0)); point2Ds.Add(new Point2D(0, 15)); point2Ds.Add(new Point2D(15, 15)); point2Ds.Add(new Point2D(15, 0)); GeoRegion region = new GeoRegion(point2Ds); region.Style = geostyle1; Symbol symbol = null; if (geostyle1.FillSymbolID == null) { symbol = m_symbolFillRootGroup[0];//symbolMarkerLibrary.FindSymbol(0);// } else { symbol = m_symbolFillRootGroup[geostyle1.FillSymbolID]; // symbol = symbolFillLibrary.FindSymbol(geostyle1.FillSymbolID);//symbolMarkerLibrary.FindSymbol(0);// } // Symbol symbol = m_symbolFillRootGroup[0];//symbolFillLibrary.FindSymbol(0);// im = DrawSymbol(symbol, region, 20, 20); } return im; } /// <summary> /// 设置符号样式 /// </summary> /// <param name="P"></param> /// <param name="c"></param> /// <returns></returns> public GeoStyle GeoStyleSample(DatasetType P, Color c) { GeoStyle objGeoStyle = new GeoStyle(); switch (P) { case DatasetType.Point: // 实例化一个点几何对象，并对其进行风格设置 // GeoStyle geoStyle_P = new GeoStyle(); objGeoStyle.LineColor = c; objGeoStyle.MarkerSize = new Size2D(5, 5); // geoStyle_P.MarkerSymbolID = 0; //系统图标 //objGeoStyle = geoStyle_P; break; case DatasetType.Line: // 实例化一个线几何对象，并对其进行风格设置 //GeoStyle geoStyle_L = new GeoStyle(); objGeoStyle.LineColor = c; //geoStyle_L.LineSymbolID = 15; objGeoStyle.LineWidth = 1.0; // objGeoStyle = geoStyle_L; break; case DatasetType.Region: // 实例化一个面几何对象，并对其进行渐变风格设置 //GeoStyle geoStyle_R = new GeoStyle(); objGeoStyle.FillBackColor = Color.White;; objGeoStyle.FillForeColor = c; objGeoStyle.FillBackOpaque = true; // geoStyle_R.FillOpaqueRate = 50; // geoStyle_R.FillSymbolID = 0; //geoStyle_R.FillGradientMode = FillGradientMode.Linear; //objGeoStyle = geoStyle_R; break; } return objGeoStyle; } #endregion #region 点、线、面 datagridview绘制 /// <summary> /// 绘制符号转换为图片 /// 我去。。。 /// </summary> /// <param name="symbol"></param> public Image DrawSymbol(Symbol symbol, Geometry geometry, Int32 width, Int32 height) { try { Bitmap bitmap = new Bitmap(width, height); if (symbol.Type == SymbolType.Marker) { //geometry.Style.MarkerSymbolID = symbol.ID; Toolkit.Draw(geometry, m_workspace.Resources, Graphics.FromImage(bitmap)); } else if (symbol.Type == SymbolType.Line) { //此句必须加上，不然在点击切换样式时无效果 // geometry.Style.LineSymbolID = symbol.ID; symbol.Draw(bitmap, geometry); // Toolkit.Draw(geometry, mainfrm.m_workspace.Resources, Graphics.FromImage(bitmap)); } else if (symbol.Type == SymbolType.Fill) { //geometry.Style.FillSymbolID = symbol.ID; symbol.Draw(bitmap, geometry); // Toolkit.Draw(geometry, mainfrm.m_workspace.Resources, Graphics.FromImage(bitmap)); } Image objImage = bitmap; return objImage; } catch (Exception ex) { // Trace.WriteLine(ex.Message); } return null; } #endregion //确定按钮 private void btnSure_Click(object sender, EventArgs e) { //默认的方式 预备暂时不用 // ThemeUnique themeunique = ThemeUnique.MakeDefault(datasetVector, comboBox1.Text.Trim(), setColorTheml[comboBoxEx1.SelectedIndex]); // 将制作好的专题图添加到地图中显示 if (datasetVector != null && objThemeUniqueItem.Count > 0) { for (int i = 0; i < objThemeUniqueItem.Count; i++) { themeunique.Add(objThemeUniqueItem[i]); } // Layer sd = mainfrm.m_LayersControl.Map.Layers.FindLayer(""); Layer layer = objMapControl.Map.Layers.Add(datasetVector, themeunique, true); // m_MapControl.Map.Refresh(); themeunique.Dispose(); this.Close(); } else { objThemeUnique.Clear(); // mainfrm.m_LayersControl.Map.Layers.Remove() for (int i = 0; i < objThemeUniqueItem.Count; i++) { objThemeUnique.Add(objThemeUniqueItem[i]); } //objThemeUnique.FromXML(themeunique.ToXML()); objMapControl.Map.Refresh(); this.Close(); } } /// <summary> /// 取消 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void BtnCancle_Click(object sender, EventArgs e) { this.Close(); } private void btnAddValue_Click(object sender, EventArgs e) { showDZinformation(); } /// <summary> /// 添加子项 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void btnAddChild_Click(object sender, EventArgs e) { changeUniqueItem showChage = new changeUniqueItem(objDeleteThemeUniqueItem, objThemeUniqueItem,dataGridView2,this); showChage.ShowDialog(); } /// <summary> /// 添加值 /// </summary> /// <param name="num"></param> public void addToDataGridView(int num) { if (objDeleteThemeUniqueItem.Count > 0) { Image im = getImage(objLayer.Type, objDeleteThemeUniqueItem[num].Style); dataGridView2.Rows.Add(true, im, objDeleteThemeUniqueItem[num].Caption); } } /// <summary> /// 删除子项 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void btnDeleteChild_Click(object sender, EventArgs e) { int num = dataGridView2.CurrentRow.Index; if (num >= 0) { //移除专题图 dataGridView2.Rows.RemoveAt(num); objDeleteThemeUniqueItem.Add(objThemeUniqueItem[num]); objThemeUniqueItem.RemoveAt(num); } } } }
