AE二次開發中幾個功能速成歸納（符號設計器、創建要素、圖形編輯、屬性表編輯、緩沖區分析）

/*
 * 實習課上講進階功能所用文檔，因為趕時間從網上抄抄改改，湊合能用，記錄一下以備個人后用。
 *
 * -------------------------------------------------------------------
 *
 * 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文件載入顯示，查看圖層屬性表等
 *
 * -------------------------------------------------------------------
 */
/* 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、符號設計
 *
 * 在TOC的doubleclick事件中寫入：
 */

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 ); /* 獲取所點擊圖例及其圖層 */

if ( e.button == 1 )

{
    if ( toccItem == esriTOCControlItem.esriTOCControlItemLegendClass )

    {
        ILegendClass pLC = new LegendClassClass();

        pLC = ( (ILegendGroup) unk).get_Class( (int) data ); /* 獲取圖例 */

        ISymbol pSym = pLC.Symbol; /* 獲取圖例的符號 */

        ESRI.ArcGIS.DisplayUI.ISymbolSelector pSS = new ESRI.ArcGIS.DisplayUI.SymbolSelectorClass(); /* 創建符號選擇器 */

        bool a = false;

        pSS.AddSymbol( pSym );

        a = pSS.SelectSymbol( 0 ); /* 打開符號選擇器 */

        if ( a )

        {
            pLC.Symbol = pSS.GetSymbolAt( 0 );
        }

        this.axMapControl1.ActiveView.Refresh();

        this.axTOCControl1.Refresh();
    }
}


/*
 * 二、創建要素
 *
 * 1.創建並添加shp新圖層
 */

/* 點shp的創建並添加 */

private void 點ToolStripMenuItem_Click( object sender, EventArgs e )

{
    string pointshppath = "";

    SaveFileDialog spointdlg = new SaveFileDialog(); /* 打開保存文件對話框，設置保存路徑和shp文件名 */

    if ( spointdlg.ShowDialog() == DialogResult.OK )

    {
        pointshppath = spointdlg.FileName;
    }else {
        return;
    }

/* 准備好要素類空對象 */

    IFeatureClass m_pointfeatureclass = null;

/* 從文件路徑中分解出文件夾路徑和文件名稱 */

    int count = pointshppath.LastIndexOf ("\");

string folder = pointshppath.Substring(0, count);

string name = pointshppath.Substring(count + 1, pointshppath.Length - count - 1);

//根據文件夾路徑創建工作空間工廠和工作空間

IWorkspace ipws;

IWorkspaceFactory ipwsf = new ShapefileWorkspaceFactoryClass();

ipws = ipwsf.OpenFromFile(folder, 0);

//轉為要素工作空間

IFeatureWorkspace ifeatws;

ifeatws = ipws as IFeatureWorkspace;

//對shp文件的一些必要設置，除了紅字部分外都不用改

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;//確定你要生成的shp的幾何類型（點線面）

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);

//////////////////////////////////////////

//創建要素類並導出shp文件於預設文件路徑

m_pointfeatureclass = ifeatws.CreateFeatureClass(name, pFields, null, null, esriFeatureType.esriFTSimple, "Shape ", " ");

//加載新創建的shp文件並調到圖層顯示順序的最頂層

axMapControl1.AddShapeFile(folder,name);

axMapControl1.MoveLayerTo(0, axMapControl1.LayerCount - 1);

return;

}

//線shp的創建並添加

private void 線ToolStripMenuItem_Click(object sender, EventArgs e)

{

string lineshppath = " ";

SaveFileDialog slinedlg = new SaveFileDialog();//打開保存文件對話框，設置保存路徑和shp文件名

if (slinedlg.ShowDialog() == DialogResult.OK)

{

lineshppath = slinedlg.FileName;

}

else

{

return;

}

//准備好要素類空對象

IFeatureClass m_linefeatureclass = null;

//從文件路徑中分解出文件夾路徑和文件名稱

int count = lineshppath.LastIndexOf(" \ ");

string folder = lineshppath.Substring(0, count);

string name = lineshppath.Substring(count + 1, lineshppath.Length - count - 1);

//根據文件夾路徑創建工作空間工廠和工作空間

IWorkspace ipws;

IWorkspaceFactory ipwsf = new ShapefileWorkspaceFactoryClass();

ipws = ipwsf.OpenFromFile(folder, 0);

//轉為要素工作空間

IFeatureWorkspace ifeatws;

ifeatws = ipws as IFeatureWorkspace;

//對shp文件的一些必要設置，除了紅字部分外都不用改

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;//確定你要生成的shp的幾何類型（點線面）

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);

//////////////////////////////////////////

//創建要素類並導出shp文件於預設文件路徑

m_linefeatureclass = ifeatws.CreateFeatureClass(name, pFields, null, null, esriFeatureType.esriFTSimple, "Shape ", " ");

//加載新創建的shp文件並調到圖層顯示順序的最頂層

axMapControl1.AddShapeFile(folder,name);

axMapControl1.MoveLayerTo(0, axMapControl1.LayerCount - 1);

return;

}

//面shp的創建並添加

private void 面ToolStripMenuItem_Click(object sender, EventArgs e)

{

string polygonshppath = " ";

SaveFileDialog spolygondlg = new SaveFileDialog();//打開保存文件對話框，設置保存路徑和shp文件名

if (spolygondlg.ShowDialog() == DialogResult.OK)

{

polygonshppath = spolygondlg.FileName;

}

else

{

return;

}

//准備好要素類空對象

IFeatureClass m_polygonfeatureclass = null;

//從文件路徑中分解出文件夾路徑和文件名稱

int count = polygonshppath.LastIndexOf(" \ ");

string folder = polygonshppath.Substring(0, count);

string name = polygonshppath.Substring(count + 1, polygonshppath.Length - count - 1);

//根據文件夾路徑創建工作空間工廠和工作空間

IWorkspace ipws;

IWorkspaceFactory ipwsf = new ShapefileWorkspaceFactoryClass();

ipws = ipwsf.OpenFromFile(folder, 0);

//轉為要素工作空間

IFeatureWorkspace ifeatws;

ifeatws = ipws as IFeatureWorkspace;

//對shp文件的一些必要設置，除了紅字部分外都不用改

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;//確定你要生成的shp的幾何類型（點線面）

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);

//////////////////////////////////////////

//創建要素類並導出shp文件於預設文件路徑

m_polygonfeatureclass = ifeatws.CreateFeatureClass(name, pFields, null, null, esriFeatureType.esriFTSimple, "Shape ", " ");

//加載新創建的shp文件並調到圖層顯示順序的最頂層

axMapControl1.AddShapeFile(folder,name);

axMapControl1.MoveLayerTo(0, axMapControl1.LayerCount - 1);

return;

}


/*
2.在shp中繪制點線面要素並儲存

課上只提到調用Toolbar里的工具：

使用流程：

開始編輯——>選擇目標圖層——>開啟草圖工具——>繪制新圖形——>保存並停止編輯

而寫代碼方式的主要思路如下（沒做撤銷和雙緩沖）：
*/
//獲取MapControl中的全部圖層名稱，並加入ComboBox

 //圖層

 toolStripComboBox1.Visible = true;

 ILayer pLayer;

 //圖層名稱

 string strLayerName;

 for (int i = 0; i < this.axMapControl1.LayerCount; i++)

            {

                pLayer = this.axMapControl1.get_Layer(i);

                strLayerName = pLayer.Name;

                //圖層名稱加入ComboBox

                this.toolStripComboBox1.Items.Add(strLayerName);

            }

            //默認顯示第一個選項



            this.toolStripComboBox1.SelectedIndex = 0;



//用三個int成員變量drawpoint、drawline、drawregion指示添加的是點、線還是面

//用三個IFeatureClass成員變量startpointshp、startlineshp、startpolygonshp來取出所選圖層的要素類

//用一個點集數列IPointArray pts存儲畫線、面時連續產生的節點

//當combobox中選項變化時判斷所選圖層的要素類的幾何類型並取出

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）中進行判斷並創建新要素圖形
if (e.button == 2 &&drawline ==0 &&drawpoint==0 && drawregion==0)

            {

                m_menuMap.PopupMenu(e.x, e.y, m_mapControl.hWnd);//沒開啟添加要素功能，則正常彈菜單項

            }

            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)//左鍵創建線的節點

            {

                IPoint pt;

                pt = axMapControl1.ToMapPoint(e.x, e.y);

                pts.Add(pt);

                return;

            }

            if (e.button == 2 && drawline == 1)//右鍵根據節點創建線

            {

                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)//左鍵創建面的節點

            {

                IPoint pt;

                pt = axMapControl1.ToMapPoint(e.x, e.y);

                pts.Add(pt);

                return;

            }

            if (e.button == 2 && drawregion == 1)//右鍵根據節點創建面

            {

                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);//面的坐標串首尾坐標應一致（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;



            }

//結束創建時執行清理、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中點線面要素的圖形編輯

使用Toolbar

使用流程：

開始編輯——>選擇目標圖層——>開啟編輯工具——>圖形編輯——>保存並停止編輯



三、屬性表編輯


1.在屬性表窗體設計中加一個按鈕用於更新數據





2.屬性表類中至少應有如下成員對象，在表開啟后這些值應都已經賦值或初始化
  * */

public DataTable attributeTable;//你的表

string tableName;//你的表的名字

public List array = new List();//你用來記錄哪些行的數據被改變了的數列

public ILayer currentlayer;//你用來獲取當前圖層的對象其中，比如，attributeTable和tableName可在Load函數中賦值，currentlayer可在構造函數中賦值

/*
3.添加如下函數
 */

//在按鈕的點擊事件中添加如下代碼

private void button1_Click(object sender, EventArgs e)

{

if (array.Count < 1)//沒有記錄到任何數據可能改變的行

{

MessageBox.Show(" 未 修改任何數據 ！ ");

return;

}

array.Sort();

ILayer player = this.currentlayer;

UpdateFTOnDV(player, attributeTable, array.ToArray());

dataGridView1.EditMode = DataGridViewEditMode.EditProgrammatically;//dataGridView1是你屬性表中顯示數據的視圖

dataGridView1.Refresh();

}

//在表的CellValueChanged事件中添加如下代碼

private void dataGridView1_CellValueChanged(object sender, DataGridViewCellEventArgs e)

{

array.Add(e.RowIndex);//將有值改變的那個行的行號記錄下來

}

//在屬性表類中添加如下函數

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())//當表格中值與shp文件屬性表中值不同時發生替換

{

if (pgridview == System.DBNull.Value)

{

string skipinfo = "第 " + (k+1).ToString() + "行第 " + (j+1).ToString() + " 列 的數據 可 為 空 自動跳過修改 ";

MessageBox.Show(skipinfo);

continue;

}

pRow.set_Value(j, pgridview);

pRow.Store();

}

}

}

MessageBox.Show("數據保存 成 功 ！ ");

}

/*
四、空間分析

以緩沖區分析為例，實現對某類地物周邊一定范圍內其他地物的統計與顯示。
 */

//buffer類中的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.創建一個windows窗體類buffer.cs



2.對窗體進行設計


目標地物（上面的）下拉框的Name設為comboBox2

被統計地物（下面的）下拉框Name設為comboBox3

分析距離textBox的Name設為textBox1

按鈕Name設為button1



3.添加相關代碼
*/
//1>Buffer類中添加三個成員


private static int counter = 1;//用來對生成圖層的計數

private AxMapControl axMapControl1;//用來獲取主框架傳進來的AxMapControl

private ArrayList flyr = new ArrayList();//用來存儲生成的圖層，便於結束分析后刪除


//2>修改構造函數為

public buffer(AxMapControl mapControl)

{

InitializeComponent();

this.axMapControl1 = mapControl;

}

//3>在窗體設計布局中，雙擊Buffer的對話框，進入buffer_Load函數，添加以下代碼

//MapControl中沒有圖層時返回

if (axMapControl1.LayerCount <= 0)

return;

ILayer pLayer;//圖層

string strLayerName;//圖層名稱

//獲取MapControl中的全部圖層名稱，並加入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);

}

//默認顯示第一個選項

comboBox2.SelectedIndex = 0;

comboBox3.SelectedIndex = 0;

//3>在窗體設計布局中，雙擊按鈕，進入click事件，添加以下代碼

//獲取所設置的緩沖區距離

string distance = this.textBox1.Text.ToString();

//給距離加上單位，默認為米

string para = distance + " Meters ";

//根據所選圖層確定其數據源位置，即shp文件所在的文件夾路徑

IDataLayer combo2 = (IDataLayer)axMapControl1.get_Layer(comboBox2.SelectedIndex);

IWorkspaceName ws = ((IDatasetName)(combo2.DataSourceName)).WorkspaceName;

string featurefolder = ws.PathName;

//使用gp處理工具

Geoprocessor gp = new Geoprocessor();

//允許覆蓋同名文件

gp.OverwriteOutput = true;

//調用緩沖區工具

ESRI.ArcGIS.AnalysisTools.Buffer buffertool = new ESRI.ArcGIS.AnalysisTools.Buffer();

//設置輸入圖層路徑和輸出圖層路徑

buffertool.in_features = featurefolder+ " \ " + comboBox2.SelectedItem + ".shp ";

buffertool.out_feature_class = featurefolder + " \ " + comboBox2.SelectedItem + "_buffer " + counter.ToString() + ".shp ";

//設置緩沖區相關參數

buffertool.buffer_distance_or_field = para;

buffertool.dissolve_option = "ALL ";

//執行

try

{ gp.Execute(buffertool, null); }

catch (Exception ex)

{

MessageBox.Show("ERROR ");

return;

}

//對生成圖層的計數

counter++;

//用生成的緩沖區與被統計地物進行疊置分析求交集

Intersect pIntersect = new Intersect();

int chooselayer = counter - 1;

Geoprocessor gp2 = new Geoprocessor();

gp2.OverwriteOutput = true;    //允許覆蓋同名文件

FeatureLayer pFeatureLayer = new FeatureLayerClass();

//設置相關參數

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 ");

//把要求交的兩個要素放到一個IGpValueTableObject中作為參數

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);

//設置輸入圖層路徑和輸出圖層路徑

pIntersect.in_features = pObject;

pIntersect.out_feature_class = featurefolder + " \ " + comboBox2.SelectedItem + "_insert " + chooselayer.ToString() + ".shp ";

pIntersect.join_attributes = "All ";

//執行

IGeoProcessorResult pResult = (IGeoProcessorResult)gp2.Execute(pIntersect, null);

//從求交的結果中提取Feature並做相關統計

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;

//將緩沖區載入地圖中顯示

axMapControl1.AddShapeFile(featurefolder + " \ ", comboBox2.SelectedItem + "_buffer " + chooselayer.ToString() + ".shp ");

axMapControl1.MoveLayerTo(0, axMapControl1.LayerCount - 1);

//獲取生成的緩沖區對象

FeatureLayer bufferlayer = axMapControl1.get_Layer(axMapControl1.LayerCount - 1) as FeatureLayer;

//將求交得到的對象載入地圖中顯示

pFeatureLayer.Name = comboBox2.SelectedItem + " 周邊 " + textBox1.Text + "米內的 " + comboBox3.SelectedItem;

axMapControl1.Map.AddLayer(pFeatureLayer);

//將生成的緩沖區和求交對象放到一個圖層數組中，在關閉緩沖區分析工具后統一移出系統

flyr.Add(bufferlayer);

flyr.Add(pFeatureLayer);

//將緩沖區分析的結果放到屬性表中並顯示

ILayer layer = pFeatureLayer as ILayer;

FrmAttribute attributeTable = new FrmAttribute(layer, axMapControl1);

attributeTable.Show();

//4>在窗體的FormClosing事件中，添加以下代碼

//刪除所有生成的緩沖區和求交對象

foreach (FeatureLayer pFeatureLayer in flyr)

{

IDataLayer2 OnOff = pFeatureLayer as IDataLayer2;

OnOff.Disconnect();

axMapControl1.Map.DeleteLayer(pFeatureLayer);

}
/*
4.在主窗體中調用此模塊

首先在菜單欄中新建一個選項如“周邊設施分析”

之后雙擊該選項，添加如下代碼
*/
buffer b = new buffer(axMapControl1);

b.Show();
/*
五、esriAddIn擴展項在ArcEngine中的添加

對原代碼中接口適當修改，使其可用於ArcEngine二次開發工程中

1.在服務中引用“AE開發用”文件夾中的MappingTools.dll

2.菜單欄中創建對應菜單，在單擊事件中加入調用代碼，並在Form1類的頂端填寫using MappingTools;
*/


//調用創建直方圖時，是在mapcontrol1的onmousedown事件中觸發創建直方圖的函數

//首先到onmousedown中加入如下代碼

if (zhifangtu == 1 && e.button==1)//開啟了直方圖功能且在地圖上單擊了鼠標左鍵時

{

Createzft (e.x,e.y);

}



//之后在Form1主類中加入如下函數

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();

}