/*
* 实习课上讲进阶功能所用文档，因为赶时间从网上抄抄改改，凑合能用，记录一下以备个人后用。
*
* -------------------------------------------------------------------
*
* 使用前提：已搭建好AE的GIS基本框架，包括TOC、mapcontrol、toolbar拖控件，mxd、shp文件载入显示，查看图层属性表等
*
* -------------------------------------------------------------------
*/
/* Form1中的using */
using System;
using System.Windows.Forms;
using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.Controls;
using ESRI.ArcGIS.Display;
using ESRI.ArcGIS.Geometry;
using ESRI.ArcGIS.Geodatabase;
using ESRI.ArcGIS.SystemUI;
using ESRI.ArcGIS.esriSystem;
using System.Drawing;
using System.Runtime.InteropServices;
using ESRI.ArcGIS.DataSourcesFile;
using System.Collections;
/*
* 一、符号设计
*
* 在TOC的doubleclick事件中写入：
*/
esriTOCControlItem toccItem = esriTOCControlItem.esriTOCControlItemNone;
ILayer iLayer = null;
IBasicMap iBasicMap = null;
object unk = null;
object data = null;
axTOCControl1.HitTest( e.x, e.y, ref toccItem, ref iBasicMap, ref iLayer, ref unk, ref data ); /* 获取所点击图例及其图层 */
if ( e.button == 1 )
{
if ( toccItem == esriTOCControlItem.esriTOCControlItemLegendClass )
{
ILegendClass pLC = new LegendClassClass();
pLC = ( (ILegendGroup) unk).get_Class( (int) data ); /* 获取图例 */
ISymbol pSym = pLC.Symbol; /* 获取图例的符号 */
ESRI.ArcGIS.DisplayUI.ISymbolSelector pSS = new ESRI.ArcGIS.DisplayUI.SymbolSelectorClass(); /* 创建符号选择器 */
bool a = false;
pSS.AddSymbol( pSym );
a = pSS.SelectSymbol( 0 ); /* 打开符号选择器 */
if ( a )
{
pLC.Symbol = pSS.GetSymbolAt( 0 );
}
this.axMapControl1.ActiveView.Refresh();
this.axTOCControl1.Refresh();
}
}
/*
* 二、创建要素
*
* 1.创建并添加shp新图层
*/
/* 点shp的创建并添加 */
private void 点ToolStripMenuItem_Click( object sender, EventArgs e )
{
string pointshppath = "";
SaveFileDialog spointdlg = new SaveFileDialog(); /* 打开保存文件对话框，设置保存路径和shp文件名 */
if ( spointdlg.ShowDialog() == DialogResult.OK )
{
pointshppath = spointdlg.FileName;
}else {
return;
}
/* 准备好要素类空对象 */
IFeatureClass m_pointfeatureclass = null;
/* 从文件路径中分解出文件夹路径和文件名称 */
int count = pointshppath.LastIndexOf ("\");
string folder = pointshppath.Substring(0, count);
string name = pointshppath.Substring(count + 1, pointshppath.Length - count - 1);
//根据文件夹路径创建工作空间工厂和工作空间
IWorkspace ipws;
IWorkspaceFactory ipwsf = new ShapefileWorkspaceFactoryClass();
ipws = ipwsf.OpenFromFile(folder, 0);
//转为要素工作空间
IFeatureWorkspace ifeatws;
ifeatws = ipws as IFeatureWorkspace;
//对shp文件的一些必要设置，除了红字部分外都不用改
IFields pFields = new FieldsClass();
IField pField = new FieldClass();
IFieldsEdit pFieldsEdit = pFields as IFieldsEdit;
IFieldEdit pFieldEdit = pField as IFieldEdit;
IGeometryDef ipGeodef = new GeometryDefClass();
IGeometryDefEdit ipGeodefEdit = ipGeodef as IGeometryDefEdit;
ISpatialReference ipSpatialRef;
IUnknownCoordinateSystem iunknowncoord = new UnknownCoordinateSystemClass();
ipSpatialRef = iunknowncoord;
ipGeodefEdit.GeometryType_2 = esriGeometryType.esriGeometryPoint;//确定你要生成的shp的几何类型（点线面）
ipSpatialRef.SetMDomain(-10000, 10000);
ipGeodefEdit.HasM_2 = false;
ipGeodefEdit.HasZ_2 = false;
ipGeodefEdit.SpatialReference_2 = ipSpatialRef;
pFieldEdit.Name_2 = "Shape ";
pFieldEdit.Type_2 = esriFieldType.esriFieldTypeGeometry;
pFieldEdit.GeometryDef_2 = ipGeodef;
pFieldsEdit.AddField(pField);
//////////////////////////////////////////
//创建要素类并导出shp文件于预设文件路径
m_pointfeatureclass = ifeatws.CreateFeatureClass(name, pFields, null, null, esriFeatureType.esriFTSimple, "Shape ", " ");
//加载新创建的shp文件并调到图层显示顺序的最顶层
axMapControl1.AddShapeFile(folder,name);
axMapControl1.MoveLayerTo(0, axMapControl1.LayerCount - 1);
return;
}
//线shp的创建并添加
private void 线ToolStripMenuItem_Click(object sender, EventArgs e)
{
string lineshppath = " ";
SaveFileDialog slinedlg = new SaveFileDialog();//打开保存文件对话框，设置保存路径和shp文件名
if (slinedlg.ShowDialog() == DialogResult.OK)
{
lineshppath = slinedlg.FileName;
}
else
{
return;
}
//准备好要素类空对象
IFeatureClass m_linefeatureclass = null;
//从文件路径中分解出文件夹路径和文件名称
int count = lineshppath.LastIndexOf(" \ ");
string folder = lineshppath.Substring(0, count);
string name = lineshppath.Substring(count + 1, lineshppath.Length - count - 1);
//根据文件夹路径创建工作空间工厂和工作空间
IWorkspace ipws;
IWorkspaceFactory ipwsf = new ShapefileWorkspaceFactoryClass();
ipws = ipwsf.OpenFromFile(folder, 0);
//转为要素工作空间
IFeatureWorkspace ifeatws;
ifeatws = ipws as IFeatureWorkspace;
//对shp文件的一些必要设置，除了红字部分外都不用改
IFields pFields = new FieldsClass();
IField pField = new FieldClass();
IFieldsEdit pFieldsEdit = pFields as IFieldsEdit;
IFieldEdit pFieldEdit = pField as IFieldEdit;
IGeometryDef ipGeodef = new GeometryDefClass();
IGeometryDefEdit ipGeodefEdit = ipGeodef as IGeometryDefEdit;
ISpatialReference ipSpatialRef;
IUnknownCoordinateSystem iunknowncoord = new UnknownCoordinateSystemClass();
ipSpatialRef = iunknowncoord;
ipGeodefEdit.GeometryType_2 = esriGeometryType.esriGeometryPolyline;//确定你要生成的shp的几何类型（点线面）
ipSpatialRef.SetMDomain(-10000, 10000);
ipGeodefEdit.HasM_2 = false;
ipGeodefEdit.HasZ_2 = false;
ipGeodefEdit.SpatialReference_2 = ipSpatialRef;
pFieldEdit.Name_2 = "Shape ";
pFieldEdit.Type_2 = esriFieldType.esriFieldTypeGeometry;
pFieldEdit.GeometryDef_2 = ipGeodef;
pFieldsEdit.AddField(pField);
//////////////////////////////////////////
//创建要素类并导出shp文件于预设文件路径
m_linefeatureclass = ifeatws.CreateFeatureClass(name, pFields, null, null, esriFeatureType.esriFTSimple, "Shape ", " ");
//加载新创建的shp文件并调到图层显示顺序的最顶层
axMapControl1.AddShapeFile(folder,name);
axMapControl1.MoveLayerTo(0, axMapControl1.LayerCount - 1);
return;
}
//面shp的创建并添加
private void 面ToolStripMenuItem_Click(object sender, EventArgs e)
{
string polygonshppath = " ";
SaveFileDialog spolygondlg = new SaveFileDialog();//打开保存文件对话框，设置保存路径和shp文件名
if (spolygondlg.ShowDialog() == DialogResult.OK)
{
polygonshppath = spolygondlg.FileName;
}
else
{
return;
}
//准备好要素类空对象
IFeatureClass m_polygonfeatureclass = null;
//从文件路径中分解出文件夹路径和文件名称
int count = polygonshppath.LastIndexOf(" \ ");
string folder = polygonshppath.Substring(0, count);
string name = polygonshppath.Substring(count + 1, polygonshppath.Length - count - 1);
//根据文件夹路径创建工作空间工厂和工作空间
IWorkspace ipws;
IWorkspaceFactory ipwsf = new ShapefileWorkspaceFactoryClass();
ipws = ipwsf.OpenFromFile(folder, 0);
//转为要素工作空间
IFeatureWorkspace ifeatws;
ifeatws = ipws as IFeatureWorkspace;
//对shp文件的一些必要设置，除了红字部分外都不用改
IFields pFields = new FieldsClass();
IField pField = new FieldClass();
IFieldsEdit pFieldsEdit = pFields as IFieldsEdit;
IFieldEdit pFieldEdit = pField as IFieldEdit;
IGeometryDef ipGeodef = new GeometryDefClass();
IGeometryDefEdit ipGeodefEdit = ipGeodef as IGeometryDefEdit;
ISpatialReference ipSpatialRef;
IUnknownCoordinateSystem iunknowncoord = new UnknownCoordinateSystemClass();
ipSpatialRef = iunknowncoord;
ipGeodefEdit.GeometryType_2 = esriGeometryType.esriGeometryPolygon;//确定你要生成的shp的几何类型（点线面）
ipSpatialRef.SetMDomain(-10000, 10000);
ipGeodefEdit.HasM_2 = false;
ipGeodefEdit.HasZ_2 = false;
ipGeodefEdit.SpatialReference_2 = ipSpatialRef;
pFieldEdit.Name_2 = "Shape ";
pFieldEdit.Type_2 = esriFieldType.esriFieldTypeGeometry;
pFieldEdit.GeometryDef_2 = ipGeodef;
pFieldsEdit.AddField(pField);
//////////////////////////////////////////
//创建要素类并导出shp文件于预设文件路径
m_polygonfeatureclass = ifeatws.CreateFeatureClass(name, pFields, null, null, esriFeatureType.esriFTSimple, "Shape ", " ");
//加载新创建的shp文件并调到图层显示顺序的最顶层
axMapControl1.AddShapeFile(folder,name);
axMapControl1.MoveLayerTo(0, axMapControl1.LayerCount - 1);
return;
}
/*
2.在shp中绘制点线面要素并储存
课上只提到调用Toolbar里的工具：
使用流程：
开始编辑——>选择目标图层——>开启草图工具——>绘制新图形——>保存并停止编辑
而写代码方式的主要思路如下（没做撤销和双缓冲）：
*/
//获取MapControl中的全部图层名称，并加入ComboBox
//图层
toolStripComboBox1.Visible = true;
ILayer pLayer;
//图层名称
string strLayerName;
for (int i = 0; i < this.axMapControl1.LayerCount; i++)
{
pLayer = this.axMapControl1.get_Layer(i);
strLayerName = pLayer.Name;
//图层名称加入ComboBox
this.toolStripComboBox1.Items.Add(strLayerName);
}
//默认显示第一个选项
this.toolStripComboBox1.SelectedIndex = 0;
//用三个int成员变量drawpoint、drawline、drawregion指示添加的是点、线还是面
//用三个IFeatureClass成员变量startpointshp、startlineshp、startpolygonshp来取出所选图层的要素类
//用一个点集数列IPointArray pts存储画线、面时连续产生的节点
//当combobox中选项变化时判断所选图层的要素类的几何类型并取出
IFeatureLayer layer = axMapControl1.get_Layer(this.toolStripComboBox1.SelectedIndex) as IFeatureLayer;
if (layer.FeatureClass.ShapeType == esriGeometryType.esriGeometryPoint)
{
startpointshp = layer.FeatureClass;
drawpoint = 1;
drawline = 0;
drawregion = 0;
}
if (layer.FeatureClass.ShapeType == esriGeometryType.esriGeometryPolyline)
{
startlineshp = layer.FeatureClass;
drawpoint = 0;
drawline = 1;
drawregion = 0;
}
if (layer.FeatureClass.ShapeType == esriGeometryType.esriGeometryPolygon)
{
startpolygonshp = layer.FeatureClass;
drawpoint = 0;
drawline = 0;
drawregion = 1;
}
//在onmousedown（onmouseup也行）中进行判断并创建新要素图形
if (e.button == 2 &&drawline ==0 &&drawpoint==0 && drawregion==0)
{
m_menuMap.PopupMenu(e.x, e.y, m_mapControl.hWnd);//没开启添加要素功能，则正常弹菜单项
}
if (e.button == 1 && drawpoint == 1)
{
IPoint pt;
pt = axMapControl1.ToMapPoint(e.x, e.y);
IFeature pFeature = startpointshp.CreateFeature();
pFeature.Shape = pt;
pFeature.Store();
this.axMapControl1.ActiveView.Refresh();
return;
}
if (e.button == 1 && drawline == 1)//左键创建线的节点
{
IPoint pt;
pt = axMapControl1.ToMapPoint(e.x, e.y);
pts.Add(pt);
return;
}
if (e.button == 2 && drawline == 1)//右键根据节点创建线
{
ESRI.ArcGIS.Geometry.IPolyline ipPolyline = new PolylineClass();
ESRI.ArcGIS.Geometry.IPointCollection ipPointCol = (IPointCollection)ipPolyline;
object missing = Type.Missing;
for (int i = 0; i < pts.Count; i++)
{
object t = pts.get_Element(i);
ESRI.ArcGIS.Geometry.Point p = (ESRI.ArcGIS.Geometry.Point)t;
if (p != null)
{
ipPointCol.AddPoint(p, ref missing, ref missing);
}
}
IPolyline polyline = ipPolyline;
IFeature pFeature = startlineshp.CreateFeature();
pFeature.Shape = polyline;
pFeature.Store();
this.axMapControl1.ActiveView.Refresh();
pts.RemoveAll();
return;
}
if (e.button == 1 && drawregion == 1)//左键创建面的节点
{
IPoint pt;
pt = axMapControl1.ToMapPoint(e.x, e.y);
pts.Add(pt);
return;
}
if (e.button == 2 && drawregion == 1)//右键根据节点创建面
{
ESRI.ArcGIS.Geometry.IPolygon ipPolyGon = new PolygonClass();
ESRI.ArcGIS.Geometry.IPointCollection ipPointCol = (IPointCollection)ipPolyGon;
object missing = Type.Missing;
for (int i = 0; i < pts.Count; i++)
{
object t = pts.get_Element(i);
ESRI.ArcGIS.Geometry.Point p = (ESRI.ArcGIS.Geometry.Point)t;
if (p != null)
{
ipPointCol.AddPoint(p, ref missing, ref missing);
}
}
ipPointCol.AddPoint(pts.get_Element(0), ref missing, ref missing);//面的坐标串首尾坐标应一致（如P1-P2-P3-P4-P1）
IPolygon polygon = ipPolyGon;
IFeature pFeature = startpolygonshp.CreateFeature();
pFeature.Shape = polygon;
pFeature.Store();
this.axMapControl1.ActiveView.Refresh();
pts.RemoveAll();
return;
}
//结束创建时执行清理、重置
drawpoint = 0;
drawline = 0;
drawregion = 0;
pts.RemoveAll();
startpointshp = null;
startlineshp = null;
startpolygonshp = null;
this.toolStripComboBox1.Visible = false;
this.toolStripComboBox1.Items.Clear();
/*
3.shp中点线面要素的图形编辑
使用Toolbar
使用流程：
开始编辑——>选择目标图层——>开启编辑工具——>图形编辑——>保存并停止编辑
三、属性表编辑
1.在属性表窗体设计中加一个按钮用于更新数据
2.属性表类中至少应有如下成员对象，在表开启后这些值应都已经赋值或初始化
* */
public DataTable attributeTable;//你的表
string tableName;//你的表的名字
public List array = new List();//你用来记录哪些行的数据被改变了的数列
public ILayer currentlayer;//你用来获取当前图层的对象其中，比如，attributeTable和tableName可在Load函数中赋值，currentlayer可在构造函数中赋值
/*
3.添加如下函数
*/
//在按钮的点击事件中添加如下代码
private void button1_Click(object sender, EventArgs e)
{
if (array.Count < 1)//没有记录到任何数据可能改变的行
{
MessageBox.Show(" 未 修改任何数据 ！ ");
return;
}
array.Sort();
ILayer player = this.currentlayer;
UpdateFTOnDV(player, attributeTable, array.ToArray());
dataGridView1.EditMode = DataGridViewEditMode.EditProgrammatically;//dataGridView1是你属性表中显示数据的视图
dataGridView1.Refresh();
}
//在表的CellValueChanged事件中添加如下代码
private void dataGridView1_CellValueChanged(object sender, DataGridViewCellEventArgs e)
{
array.Add(e.RowIndex);//将有值改变的那个行的行号记录下来
}
//在属性表类中添加如下函数
public void UpdateFTOnDV(ILayer player, DataTable pdatatable, int[] array)
{
IFeatureLayer pFTClass = player as IFeatureLayer;
ITable pTable = pFTClass as ITable;
IRow pRow;
ICursor pCursor = pTable.GetRows(array, false);
for (int i = 0; i < array.Length; i++)
{
pRow = pCursor.NextRow();
int k = array[i];
for (int j = 2; j < pdatatable.Columns.Count; j++)
{
object pgridview = pdatatable.Rows[k][j];
object prow = pRow.get_Value(j);
if (prow.ToString() != pgridview.ToString())//当表格中值与shp文件属性表中值不同时发生替换
{
if (pgridview == System.DBNull.Value)
{
string skipinfo = "第 " + (k+1).ToString() + "行第 " + (j+1).ToString() + " 列 的数据 可 为 空 自动跳过修改 ";
MessageBox.Show(skipinfo);
continue;
}
pRow.set_Value(j, pgridview);
pRow.Store();
}
}
}
MessageBox.Show("数据保存 成 功 ！ ");
}
/*
四、空间分析
以缓冲区分析为例，实现对某类地物周边一定范围内其他地物的统计与显示。
*/
//buffer类中的using
using System;
using System.Windows.Forms;
using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.Controls;
using ESRI.ArcGIS.Geoprocessing;
using ESRI.ArcGIS.Geoprocessor;
using ESRI.ArcGIS.Geodatabase;
using ESRI.ArcGIS.AnalysisTools;
using System.Collections;
/*
1.创建一个windows窗体类buffer.cs
2.对窗体进行设计
目标地物（上面的）下拉框的Name设为comboBox2
被统计地物（下面的）下拉框Name设为comboBox3
分析距离textBox的Name设为textBox1
按钮Name设为button1
3.添加相关代码
*/
//1>Buffer类中添加三个成员
private static int counter = 1;//用来对生成图层的计数
private AxMapControl axMapControl1;//用来获取主框架传进来的AxMapControl
private ArrayList flyr = new ArrayList();//用来存储生成的图层，便于结束分析后删除
//2>修改构造函数为
public buffer(AxMapControl mapControl)
{
InitializeComponent();
this.axMapControl1 = mapControl;
}
//3>在窗体设计布局中，双击Buffer的对话框，进入buffer_Load函数，添加以下代码
//MapControl中没有图层时返回
if (axMapControl1.LayerCount <= 0)
return;
ILayer pLayer;//图层
string strLayerName;//图层名称
//获取MapControl中的全部图层名称，并加入ComboBox
for (int i = 0; i < axMapControl1.LayerCount; i++)
{
pLayer = axMapControl1.get_Layer(i);
strLayerName = pLayer.Name;
comboBox2.Items.Add(strLayerName);
comboBox3.Items.Add(strLayerName);
}
//默认显示第一个选项
comboBox2.SelectedIndex = 0;
comboBox3.SelectedIndex = 0;
//3>在窗体设计布局中，双击按钮，进入click事件，添加以下代码
//获取所设置的缓冲区距离
string distance = this.textBox1.Text.ToString();
//给距离加上单位，默认为米
string para = distance + " Meters ";
//根据所选图层确定其数据源位置，即shp文件所在的文件夹路径
IDataLayer combo2 = (IDataLayer)axMapControl1.get_Layer(comboBox2.SelectedIndex);
IWorkspaceName ws = ((IDatasetName)(combo2.DataSourceName)).WorkspaceName;
string featurefolder = ws.PathName;
//使用gp处理工具
Geoprocessor gp = new Geoprocessor();
//允许覆盖同名文件
gp.OverwriteOutput = true;
//调用缓冲区工具
ESRI.ArcGIS.AnalysisTools.Buffer buffertool = new ESRI.ArcGIS.AnalysisTools.Buffer();
//设置输入图层路径和输出图层路径
buffertool.in_features = featurefolder+ " \ " + comboBox2.SelectedItem + ".shp ";
buffertool.out_feature_class = featurefolder + " \ " + comboBox2.SelectedItem + "_buffer " + counter.ToString() + ".shp ";
//设置缓冲区相关参数
buffertool.buffer_distance_or_field = para;
buffertool.dissolve_option = "ALL ";
//执行
try
{ gp.Execute(buffertool, null); }
catch (Exception ex)
{
MessageBox.Show("ERROR ");
return;
}
//对生成图层的计数
counter++;
//用生成的缓冲区与被统计地物进行叠置分析求交集
Intersect pIntersect = new Intersect();
int chooselayer = counter - 1;
Geoprocessor gp2 = new Geoprocessor();
gp2.OverwriteOutput = true; //允许覆盖同名文件
FeatureLayer pFeatureLayer = new FeatureLayerClass();
//设置相关参数
object obj = gp2.GetEnvironmentValue("Extent ");
gp2.SetEnvironmentValue("Extent ", "MAXOF ");
obj = gp2.GetEnvironmentValue("OutputZFlag ");
gp2.SetEnvironmentValue("OutputZFlag ", "DEFAULT ");
obj = gp2.GetEnvironmentValue("OutputMFlag ");
gp2.SetEnvironmentValue("OutputMFlag ", "DEFAULT ");
obj = gp2.GetEnvironmentValue("QualifiedFieldNames ");
gp2.SetEnvironmentValue("QualifiedFieldNames ", "QUALIFIED ");
//把要求交的两个要素放到一个IGpValueTableObject中作为参数
IGpValueTableObject pObject = new GpValueTableObjectClass();
pObject.SetColumns(2);
object inputfeature = featurefolder + " \ " + comboBox3.SelectedItem + ".shp ";
pObject.AddRow(ref inputfeature);
object inputfeature2 = featurefolder + " \ " + comboBox2.SelectedItem + "_buffer " + chooselayer.ToString() + ".shp ";
pObject.AddRow(ref inputfeature2);
//设置输入图层路径和输出图层路径
pIntersect.in_features = pObject;
pIntersect.out_feature_class = featurefolder + " \ " + comboBox2.SelectedItem + "_insert " + chooselayer.ToString() + ".shp ";
pIntersect.join_attributes = "All ";
//执行
IGeoProcessorResult pResult = (IGeoProcessorResult)gp2.Execute(pIntersect, null);
//从求交的结果中提取Feature并做相关统计
IGPUtilities pGPUtil = new GPUtilitiesClass();
IFeatureClass pFC;
IQueryFilter pQF;
pGPUtil.DecodeFeatureLayer(pResult.GetOutput(0), out pFC, out pQF);
int count = pFC.FeatureCount(null);
IFeatureCursor pCursor = pFC.Insert(true);
pFeatureLayer.FeatureClass = pFC;
//将缓冲区载入地图中显示
axMapControl1.AddShapeFile(featurefolder + " \ ", comboBox2.SelectedItem + "_buffer " + chooselayer.ToString() + ".shp ");
axMapControl1.MoveLayerTo(0, axMapControl1.LayerCount - 1);
//获取生成的缓冲区对象
FeatureLayer bufferlayer = axMapControl1.get_Layer(axMapControl1.LayerCount - 1) as FeatureLayer;
//将求交得到的对象载入地图中显示
pFeatureLayer.Name = comboBox2.SelectedItem + " 周边 " + textBox1.Text + "米内的 " + comboBox3.SelectedItem;
axMapControl1.Map.AddLayer(pFeatureLayer);
//将生成的缓冲区和求交对象放到一个图层数组中，在关闭缓冲区分析工具后统一移出系统
flyr.Add(bufferlayer);
flyr.Add(pFeatureLayer);
//将缓冲区分析的结果放到属性表中并显示
ILayer layer = pFeatureLayer as ILayer;
FrmAttribute attributeTable = new FrmAttribute(layer, axMapControl1);
attributeTable.Show();
//4>在窗体的FormClosing事件中，添加以下代码
//删除所有生成的缓冲区和求交对象
foreach (FeatureLayer pFeatureLayer in flyr)
{
IDataLayer2 OnOff = pFeatureLayer as IDataLayer2;
OnOff.Disconnect();
axMapControl1.Map.DeleteLayer(pFeatureLayer);
}
/*
4.在主窗体中调用此模块
首先在菜单栏中新建一个选项如“周边设施分析”
之后双击该选项，添加如下代码
*/
buffer b = new buffer(axMapControl1);
b.Show();
/*
五、esriAddIn扩展项在ArcEngine中的添加
对原代码中接口适当修改，使其可用于ArcEngine二次开发工程中
1.在服务中引用“AE开发用”文件夹中的MappingTools.dll
2.菜单栏中创建对应菜单，在单击事件中加入调用代码，并在Form1类的顶端填写using MappingTools;
*/
//调用创建直方图时，是在mapcontrol1的onmousedown事件中触发创建直方图的函数
//首先到onmousedown中加入如下代码
if (zhifangtu == 1 && e.button==1)//开启了直方图功能且在地图上单击了鼠标左键时
{
Createzft (e.x,e.y);
}
//之后在Form1主类中加入如下函数
Public void Createzft(int x,int y)
{
MappingTools.CreateGraph a = new MappingTools.CreateGraph();
frmGraph frm = new frmGraph(this.axMapControl1);
frm.BasePoint = axMapControl1.ActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(x, y);
DialogResult re = frm.ShowDialog();
}
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