AE+VS+c#开发颜色符号系统之依比例符号化（六）

本文主要是介绍AE+VS+c#开发颜色符号系统之依比例符号化（六），希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

首先总结一下之前写的几篇符号化文章，列表如下：

AE+VS开发颜色符号系统之单一值符号（一）

AE+VS开发颜色符号系统之唯一值符号（二）

AE+VS开发颜色符号系统之分类符号（三）

AE+VS开发颜色符号系统之分级符号符号化（四）

AE+VS+c#开发颜色符号系统之分级色彩符号化（五）

和之前的操作一样，直接贴几段代码：

ProportionalSymbolsCmd.cs代码

using System;
using System.Drawing;
using System.Runtime.InteropServices;
using ESRI.ArcGIS.ADF.BaseClasses;
using ESRI.ArcGIS.ADF.CATIDs;
using ESRI.ArcGIS.Controls;namespace Visualization
{/// <summary>/// Command that works in ArcMap/Map/PageLayout/// </summary>[Guid("480b7562-e1ed-4e05-a119-9a7d9b5e2863")][ClassInterface(ClassInterfaceType.None)][ProgId("Visualization.ProportionalSymbolsCmd")]public sealed class ProportionalSymbolsCmd : BaseCommand{#region COM Registration Function(s)[ComRegisterFunction()][ComVisible(false)]static void RegisterFunction(Type registerType){// Required for ArcGIS Component Category Registrar supportArcGISCategoryRegistration(registerType);//// TODO: Add any COM registration code here//}[ComUnregisterFunction()][ComVisible(false)]static void UnregisterFunction(Type registerType){// Required for ArcGIS Component Category Registrar supportArcGISCategoryUnregistration(registerType);//// TODO: Add any COM unregistration code here//}#region ArcGIS Component Category Registrar generated code/// <summary>/// Required method for ArcGIS Component Category registration -/// Do not modify the contents of this method with the code editor./// </summary>private static void ArcGISCategoryRegistration(Type registerType){string regKey = string.Format("HKEY_CLASSES_ROOT\\CLSID\\{{{0}}}", registerType.GUID);MxCommands.Register(regKey);ControlsCommands.Register(regKey);}/// <summary>/// Required method for ArcGIS Component Category unregistration -/// Do not modify the contents of this method with the code editor./// </summary>private static void ArcGISCategoryUnregistration(Type registerType){string regKey = string.Format("HKEY_CLASSES_ROOT\\CLSID\\{{{0}}}", registerType.GUID);MxCommands.Unregister(regKey);ControlsCommands.Unregister(regKey);}#endregion#endregionprivate IHookHelper m_hookHelper = null;public ProportionalSymbolsCmd(){base.m_category = "Visualization";base.m_caption = "依比例符号符号化";base.m_message = "依比例符号符号化";base.m_toolTip = "依比例符号符号化";base.m_name = "ProportionalSymbolsCmd";   try{//// TODO: change bitmap name if necessary//string bitmapResourceName = GetType().Name + ".bmp";base.m_bitmap = new Bitmap(GetType(), bitmapResourceName);}catch (Exception ex){System.Diagnostics.Trace.WriteLine(ex.Message, "Invalid Bitmap");}}#region Overridden Class Methods/// <summary>/// Occurs when this command is created/// </summary>/// <param name="hook">Instance of the application</param>public override void OnCreate(object hook){if (hook == null)return;try{m_hookHelper = new HookHelperClass();m_hookHelper.Hook = hook;if (m_hookHelper.ActiveView == null)m_hookHelper = null;}catch{m_hookHelper = null;}if (m_hookHelper == null)base.m_enabled = false;elsebase.m_enabled = true;// TODO:  Add other initialization code}/// <summary>/// Occurs when this command is clicked/// </summary>public override void OnClick(){if (m_hookHelper == null) return;if (m_hookHelper.FocusMap.LayerCount > 0){ProportionalSymbols symbol = new ProportionalSymbols(m_hookHelper);symbol.Show(m_hookHelper as System.Windows.Forms.IWin32Window);}}#endregion}
}

ProportionalSymbols窗体及代码

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 ESRI.ArcGIS.Controls;
using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.Display;
using ESRI.ArcGIS.Framework;
using ESRI.ArcGIS.esriSystem;
using ESRI.ArcGIS.DisplayUI;
using ESRI.ArcGIS.Geodatabase;
using ESRI.ArcGIS.Geometry;namespace Visualization
{public partial class ProportionalSymbols : Form{IHookHelper m_hookHelper = null;IActiveView m_activeView = null;IMap m_map = null;IFeatureLayer layer2Symbolize = null;string strRendererField = string.Empty;string strNormalizeField = string.Empty;//    IStyleGallery pStyleGlry = new StyleGallery();IMarkerSymbol markerSymbol = null;IFillSymbol fillSymbol = null;//   IColor gColor = null;double minSize = 12;int legendCount = 5;public ProportionalSymbols(IHookHelper hookHelper){InitializeComponent();m_hookHelper = hookHelper;m_activeView = m_hookHelper.ActiveView;m_map = m_hookHelper.FocusMap;}private void ProportionalSymbols_Load(object sender, EventArgs e){CbxLayersAddItems();}private void cbxLayers2Symbolize_SelectedIndexChanged(object sender, EventArgs e){if (cbxLayers2Symbolize.SelectedItem != null){string strLayer2Symbolize = cbxLayers2Symbolize.SelectedItem.ToString();layer2Symbolize = GetFeatureLayer(strLayer2Symbolize);CbxFieldAdditems(layer2Symbolize);strRendererField = cbxFields.Items[0].ToString();}}private void CbxFieldAdditems(IFeatureLayer featureLayer){IFields fields = featureLayer.FeatureClass.Fields;cbxFields.Items.Clear();cbxNormalization.Items.Clear();cbxNormalization.Items.Add("None");for (int i = 0; i < fields.FieldCount; i++){if ((fields.get_Field(i).Type == esriFieldType.esriFieldTypeDouble) ||(fields.get_Field(i).Type == esriFieldType.esriFieldTypeInteger) ||(fields.get_Field(i).Type == esriFieldType.esriFieldTypeSingle) ||(fields.get_Field(i).Type == esriFieldType.esriFieldTypeSmallInteger)){cbxFields.Items.Add(fields.get_Field(i).Name);cbxNormalization.Items.Add(fields.get_Field(i).Name);}}cbxFields.SelectedIndex = 0;cbxNormalization.SelectedIndex = 0;}private void CbxLayersAddItems(){if (GetLayers() == null) return;IEnumLayer layers = GetLayers();layers.Reset();ILayer layer = layers.Next();while (layer != null){if (layer is IFeatureLayer){cbxLayers2Symbolize.Items.Add(layer.Name);}layer = layers.Next();}}private void btnSymbolize_Click(object sender, EventArgs e){if (layer2Symbolize == null) return;Renderer();}private IProportionalSymbolRenderer CreateRenderer(){IGeoFeatureLayer pGeoFeatureLayer = (IGeoFeatureLayer)layer2Symbolize;ITable pTable = (ITable)pGeoFeatureLayer;ICursor pCursor = pTable.Search(null, false);//Use the statistics objects to calculate the max value and the min valueIDataStatistics pDataStatistics = new DataStatisticsClass();pDataStatistics.Cursor = pCursor;//Set statistical fieldpDataStatistics.Field = strRendererField;//Get the result of statisticsIStatisticsResults pStatisticsResult = pDataStatistics.Statistics;if (pStatisticsResult == null) return null;if (markerSymbol == null){MessageBox.Show("请先选择点符号...", "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);return null;}if (fillSymbol == null){MessageBox.Show("请先选择背景...", "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);return null;}markerSymbol.Size = minSize;// Create a new proportional symbol renderer to draw pop1990IProportionalSymbolRenderer pProportionalSymbolR = new ProportionalSymbolRendererClass();   pProportionalSymbolR.Field = strRendererField;if (strNormalizeField.ToLower() != "none")pProportionalSymbolR.NormField = strNormalizeField;pProportionalSymbolR.MinDataValue = pStatisticsResult.Minimum;pProportionalSymbolR.MaxDataValue = pStatisticsResult.Maximum;pProportionalSymbolR.BackgroundSymbol = fillSymbol;pProportionalSymbolR.MinSymbol = (ISymbol)markerSymbol;pProportionalSymbolR.LegendSymbolCount = legendCount;pProportionalSymbolR.CreateLegendSymbols();return pProportionalSymbolR;}private void Renderer(){IGeoFeatureLayer pGeoFeatureL = (IGeoFeatureLayer)layer2Symbolize;IFeatureClass featureClass = pGeoFeatureL.FeatureClass;//找出rendererField在字段中的编号int lfieldNumber = featureClass.FindField(strRendererField);if (lfieldNumber == -1){MessageBox.Show("Can't find field called " + strRendererField);return;}IProportionalSymbolRenderer renderer = CreateRenderer();if (renderer == null) return;pGeoFeatureL.Renderer = (IFeatureRenderer)renderer;m_activeView.PartialRefresh(esriViewDrawPhase.esriViewGeography, null, m_activeView.Extent);}private void btnClose_Click(object sender, EventArgs e){this.Close();}#region "GetLayers"private IEnumLayer GetLayers(){UID uid = new UIDClass();uid.Value = "{40A9E885-5533-11d0-98BE-00805F7CED21}";// IFeatureLayer//uid.Value = "{E156D7E5-22AF-11D3-9F99-00C04F6BC78E}";  // IGeoFeatureLayer//uid.Value = "{6CA416B1-E160-11D2-9F4E-00C04F6BC78E}";  // IDataLayerif (m_map.LayerCount != 0){IEnumLayer layers = m_map.get_Layers(uid, true);return layers;}return null;}#endregion#region "GetFeatureLayer"private IFeatureLayer GetFeatureLayer(string layerName){//get the layers from the mapsif (GetLayers() == null) return null;IEnumLayer layers = GetLayers();layers.Reset();ILayer layer = null;while ((layer = layers.Next()) != null){if (layer.Name == layerName)return layer as IFeatureLayer;}return null;}#endregionprivate void cbxFields_SelectedIndexChanged(object sender, EventArgs e){if (cbxFields.SelectedItem != null){strRendererField = cbxFields.SelectedItem.ToString();}}private void cbxNormalization_SelectedIndexChanged(object sender, EventArgs e){if (cbxNormalization.SelectedItem != null){strNormalizeField = cbxNormalization.SelectedItem.ToString();}}private void btnSelectBackColor_Click(object sender, EventArgs e){GetSymbolByControl fillSymbolForm = new GetSymbolByControl(esriSymbologyStyleClass.esriStyleClassFillSymbols);fillSymbolForm.ShowDialog();if (fillSymbolForm.m_styleGalleryItem == null) return;fillSymbol = fillSymbolForm.m_styleGalleryItem.Item as IFillSymbol;fillSymbolForm.Dispose();}private void btnSelectSymbol_Click(object sender, EventArgs e){GetSymbolByControl markerSymbolForm = new GetSymbolByControl(esriSymbologyStyleClass.esriStyleClassMarkerSymbols);markerSymbolForm.ShowDialog();if (markerSymbolForm.m_styleGalleryItem == null) return;markerSymbol = markerSymbolForm.m_styleGalleryItem.Item as IMarkerSymbol;markerSymbolForm.Dispose();}private ISymbol GetSymbolBySymbolSelector(esriGeometryType geometryType){try{ISymbolSelector pSymbolSelector = new SymbolSelectorClass();ISymbol symbol = null;switch (geometryType){case ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPoint:symbol = new SimpleMarkerSymbolClass();break;case ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPolyline:symbol = new SimpleLineSymbolClass();break;case ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPolygon:symbol = new SimpleFillSymbolClass();break;default:break;}pSymbolSelector.AddSymbol(symbol);bool response = pSymbolSelector.SelectSymbol(0);if (response){symbol = pSymbolSelector.GetSymbolAt(0);return symbol;}return null;}catch (Exception ex){MessageBox.Show(ex.Message);ISymbol symbol = null;switch (geometryType){case ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPoint:symbol = new SimpleMarkerSymbolClass();break;case ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPolyline:symbol = new SimpleLineSymbolClass();break;case ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPolygon:symbol = new SimpleFillSymbolClass(); break;default:break;}return symbol;}}private void nudLegendCount_ValueChanged(object sender, EventArgs e){legendCount = Convert.ToInt32(nudLegendCount.Value);}private void nudMinsize_ValueChanged(object sender, EventArgs e){minSize = Convert.ToDouble(nudMinsize.Value);}           }
}

关于前面提到的TOC控件爱你不能刷新的问题找到了，需要在axMapControl1_OnViewRefreshed事件里面添加一下代码：

axTOCControl1.Update();即可解决这个问题。不过可能会出现异常：