此文是用.NET Iobject 7c 下利用vs2010開(kāi)發(fā)的winform版 單值專(zhuān)題圖的創(chuàng)建及色帶的修改。在此記下來(lái)以便后期參考(可能很快就會(huì)被淹沒(méi)，超圖的更新?lián)Q代很快)

　　初期由于不知道樣式的承載控件應(yīng)該選擇那個(gè)，測(cè)試過(guò)listview、listbox，但是效果都不滿(mǎn)意，偶然間查到datagridview可以更好的充當(dāng)這個(gè)角色，展示效果做好肯定就要配套的修改功能了，這個(gè)修改我咨詢(xún)過(guò)客服，客服說(shuō)在修改方面，只是給了一個(gè)樣式修改的接口，我測(cè)試過(guò)對(duì)修改對(duì)象進(jìn)行清空，賦值都不行，對(duì)象和地圖展示的關(guān)聯(lián)較強(qiáng)；

在測(cè)試中發(fā)現(xiàn)，若是對(duì)專(zhuān)題圖對(duì)象刪除再次添加，所添加的名稱(chēng)和刪除圖層的名稱(chēng)保持不變，最后只能曲線的進(jìn)行對(duì)圖層的刪除和重新添加，

----》 第一個(gè)窗體為主窗體展示，最后一個(gè)窗體為增刪值做準(zhǔn)備

說(shuō)明：1 下拉框根據(jù)單值的條件篩選填入字段名稱(chēng)

　　　2 承載數(shù)據(jù)的控件時(shí)datagridview，需要把該控件的列指定特定的值 如圖 2?

　　?? 3? 按鈕--添加所有值就是重新根據(jù)條件進(jìn)行讀取一次數(shù)據(jù)并展示出來(lái)

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>/// 窗體加載事件/// </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"));//設(shè)置單值專(zhuān)題圖數(shù)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->藍(lán)漸變色", 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);#endregiondataGridView2.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 單值專(zhuān)題圖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;}// 設(shè)置單值專(zhuān)題圖ThemeUnique themeunique = null;DatasetVector datasetVector = null;Geometry objg = null;Resources resources = null;//單只專(zhuān)題圖子項(xiàng)集合List<ThemeUniqueItem> objThemeUniqueItem = new List<ThemeUniqueItem>();//刪除的單值專(zhuān)題圖集合List<ThemeUniqueItem> objDeleteThemeUniqueItem = new List<ThemeUniqueItem>();List<string> list = new List<string>();/// <summary>/// 單值綁定方法/// </summary>public void showDZinformation(){themeunique = new ThemeUnique();//清空數(shù)據(jù)objThemeUniqueItem.Clear();objDeleteThemeUniqueItem.Clear();list.Clear();//專(zhuān)題圖清空themeunique.Clear();//列表清空dataGridView2.Rows.Clear();// 當(dāng)只有普通圖層時(shí)，添加專(zhuān)題圖層datasetVector = objLayer as DatasetVector;//設(shè)置字段表達(dá)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的行對(duì)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("字段數(shù)有問(wèn)題！", "提示");}objRecor.MoveNext();//移到下個(gè)列}//釋放對(duì)象objRecor.Dispose();//專(zhuān)題圖子項(xiàng)ThemeUniqueItem objItem = null;GeoStyle geostyle1 = null;Random objRan = new Random();// 根據(jù)指定的漸變顏色類(lèi)型，返回一個(gè) Colors 類(lèi)的對(duì)象//運(yùn)行結(jié)果是根據(jù)指定的漸變顏色返回的4個(gè)顏色構(gòu)成的顏色集合，顏色值為://(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);// 得到點(diǎn)線面的RootGroupList<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>/// 單元格單擊事件 此事件主要針對(duì)專(zhuān)題圖的顯示和隱藏進(jìn)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>/// 單元格雙擊事件/// </summary>/// <param name="sender"></param>/// <param name="e"></param>void dataGridView2_CellMouseDoubleClick(object sender, DataGridViewCellMouseEventArgs e){ if (dataGridView2.Columns[e.ColumnIndex].Name.Equals("imgvalue")){//樣式符號(hào)GeoStyle objGeoStyle = SymbolDialog.ShowDialog(m_workspace.Resources, objThemeUniqueItem[e.RowIndex].Style, GetSymbolType(objLayer.Type));if (objGeoStyle != null){//更新專(zhuān)題圖樣式objThemeUniqueItem[e.RowIndex].Style = objGeoStyle;//更換列表中的圖像if (objLayer.Type == DatasetType.Point){//獲取符號(hào)編號(hào)int num = objGeoStyle.MarkerSymbolID;//加載符號(hào)庫(kù)SymbolLibrary symbolMarkerLibrary = resources.MarkerLibrary;//擬定一個(gè)點(diǎn)對(duì)象GeoPoint point = new GeoPoint(5, 5);//獲取并賦值對(duì)應(yīng)的點(diǎn)樣式point.Style = objGeoStyle;//從庫(kù)中查找對(duì)應(yīng)的點(diǎn)符號(hào)編號(hào)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){//獲取符號(hào)編號(hào)int num = objGeoStyle.LineSymbolID;//加載符號(hào)庫(kù)SymbolLibrary symbolMarkerLibrary = resources.LineLibrary;//擬定一個(gè)線對(duì)象Point2Ds point2Ds = new Point2Ds();point2Ds.Add(new Point2D(0, 5));point2Ds.Add(new Point2D(15, 5));GeoLine line = new GeoLine(point2Ds);//獲取并賦值對(duì)應(yīng)的點(diǎn)樣式line.Style = objGeoStyle;//從庫(kù)中查找對(duì)應(yīng)的線符號(hào)編號(hào)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){//獲取符號(hào)編號(hào)int num = objGeoStyle.FillSymbolID;//加載符號(hào)庫(kù)SymbolLibrary symbolFillLibrary = resources.FillLibrary;//擬定一個(gè)面對(duì)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);//獲取并賦值對(duì)應(yīng)的面樣式region.Style = objGeoStyle;//從庫(kù)中查找對(duì)應(yīng)的點(diǎn)符號(hào)編號(hào)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>/// 根據(jù)數(shù)據(jù)集類(lèi)型獲取符號(hào)庫(kù)的類(lèi)型/// </summary>/// <param name="datasetType">數(shù)據(jù)集類(lèi)型</param>/// <returns>返回符號(hào)庫(kù)類(lèi)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>///獲取列表中顯示的圖片 設(shè)置默認(rèn)值并在列表中顯示/// </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){//符號(hào)庫(kù)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;//構(gòu)造點(diǎn)對(duì)象，由點(diǎn)組成面對(duì)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>/// 設(shè)置符號(hào)樣式/// </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:// 實(shí)例化一個(gè)點(diǎn)幾何對(duì)象，并對(duì)其進(jìn)行風(fēng)格設(shè)置// GeoStyle geoStyle_P = new GeoStyle();objGeoStyle.LineColor = c;objGeoStyle.MarkerSize = new Size2D(5, 5);// geoStyle_P.MarkerSymbolID = 0; //系統(tǒng)圖標(biāo)//objGeoStyle = geoStyle_P;break;case DatasetType.Line:// 實(shí)例化一個(gè)線幾何對(duì)象，并對(duì)其進(jìn)行風(fēng)格設(shè)置//GeoStyle geoStyle_L = new GeoStyle();objGeoStyle.LineColor = c;//geoStyle_L.LineSymbolID = 15;objGeoStyle.LineWidth = 1.0; // objGeoStyle = geoStyle_L;break;case DatasetType.Region:// 實(shí)例化一個(gè)面幾何對(duì)象，并對(duì)其進(jìn)行漸變風(fēng)格設(shè)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 點(diǎn)、線、面 datagridview繪制/// <summary>/// 繪制符號(hào)轉(zhuǎn)換為圖片/// 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){//此句必須加上，不然在點(diǎn)擊切換樣式時(shí)無(wú)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//確定按鈕private void btnSure_Click(object sender, EventArgs e){//默認(rèn)的方式 預(yù)備暫時(shí)不用// ThemeUnique themeunique = ThemeUnique.MakeDefault(datasetVector, comboBox1.Text.Trim(), setColorTheml[comboBoxEx1.SelectedIndex]);// 將制作好的專(zhuān)題圖添加到地圖中顯示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>/// 添加子項(xiàng)/// </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>/// 刪除子項(xiàng)/// </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) {//移除專(zhuān)題圖 dataGridView2.Rows.RemoveAt(num);objDeleteThemeUniqueItem.Add(objThemeUniqueItem[num]);objThemeUniqueItem.RemoveAt(num); }}} } 主窗體代碼

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