1、开发环境
Vs2012+Arcgis10.2+win7 64bit
2、实现代码
首先在VS2012中新建一个解决方案，命名AddInTest。
接着，给解决方案AddInTest新建一个项目：
点击[确定]，出现如下界面，点击[Next]。
接着，设置相关信息，并点击[finish]完成。
上图中，class name是类的名称，caption是button显示的文字，category是所属的command的分类，tooltip是鼠标在上面时状态栏显示的文字，description是工具的描述。
项目建成后，文件组织如下图：
将项目的框架改为framework 4.5
Config.esriaddinx是一个XML文件，是一个配置文件，里面包含了项目的相关配置，是自动生成的，内容如下：
01.<esri.configuration xmlns="http://schemas.esri.com/Desktop/AddIns" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
02.<name>ArcMapAddinTest</name>
03.<addinid>{0f7ec41b-d1e3-4391-8d67-9dea10bea621}</addinid>
04.<description>Type in a description for this Add-in.</description>
05.<version>1.0</version>
06.<img src="" style="display: none;"><img alt="加载中..." title="图片加载中..."src="http://www.it165.net/statics/images/s_nopic.gif">ImagesArcMapAddinTest.png
07.<author>Administrator</author>
08.<company></company>
09.<date>2013/12/12</date>
10.<targets>
11.<target name="Desktop" version="10.0">
12.</target></targets>
13.<addin language="CLR" library="ArcMapAddinTest.dll" namespace="ArcMapAddinTest">
14.<arcmap>
15.<commands><button caption="AddShp" category="Add-In Controls" class="AddShp" id="ArcMapAddinTest_AddShp"image="ImagesAddShp.png" message="点击浏览shp文件并添加" tip="实现添加shp文件的功能"></button></commands></arcmap></addin></esri.configuration>
01.using System;
02.using System.Collections.Generic;
03.using System.Text;
04.using System.IO;
05. 06. 07.namespace ArcMapAddinTest
08.{
09.public class AddShp : ESRI.ArcGIS.Desktop.AddIns.Button
10.{
11.public AddShp()
12.{
13.}
14. 15.protected override void OnClick()
16.{
17.}
18. 19.protected override void OnUpdate()
20.{
21.}
22.}
23.}
里面包含两个方法，onclick和onupdate方法。onclick方法是点击按钮时，我们在里面写添加shp文件的代码。
首先，添加如下引用：
1.using System.Windows.Forms;
2.using ESRI.ArcGIS.ArcMapUI;
3.using ESRI.ArcGIS.Carto;
4.using ESRI.ArcGIS.Geometry;
5.using ESRI.ArcGIS.Geodatabase;
6.using ESRI.ArcGIS.DataSourcesFile;
onclick方法里，事件的实现代码如下：
01.IMxDocument pMxd;
02.public Button1()
03.{
04.pMxd = ArcMap.Document as IMxDocument;
05.}
06. 07.protected override void OnClick()
08.{
09.System.Windows.Forms.OpenFileDialog openFileDialog = new System.Windows.Forms.OpenFileDialog();
10.openFileDialog.Filter = "shp(*.shp)|*.shp";
11.openFileDialog.InitialDirectory = @"D:";
12.openFileDialog.Multiselect = false;
13.DialogResult pDialogResult = openFileDialog.ShowDialog();
14.if (pDialogResult != DialogResult.OK)
15.{
16.return;
17.}
18.string pPath = openFileDialog.FileName;
19.string pFolder = System.IO.Path.GetDirectoryName(pPath);
20.string pFileName = System.IO.Path.GetFileName(pPath);
21. 22.IWorkspaceFactory pWorkspaceFactory = new ShapefileWorkspaceFactory();
23.IWorkspace pWorkspace = pWorkspaceFactory.OpenFromFile(pFolder, 0);
24.IFeatureWorkspace pFeatureWorkspace = pWorkspace as IFeatureWorkspace;
25.IFeatureClass pFC = pFeatureWorkspace.OpenFeatureClass(pFileName);
26.IFeatureLayer pFLayer = new FeatureLayerClass();
27.pFLayer.FeatureClass = pFC;
28.pFLayer.Name = pFC.AliasName;
29.ILayer pLayer = pFLayer as ILayer;
30.IMap pMap = pMxd.FocusMap;
31.pMap.AddLayer(pLayer);
32. 33.//
34.// TODO: Sample code showing how to access button host
35.//
36.ArcMap.Application.CurrentTool = null;
37.}
OnUpdate方法事件的代码如下：
1.protected override void OnUpdate()
2.{
3.Enabled = pMxd.FocusMap.LayerCount >= 0;
4.}
代码编写完成后，编译程序，打开编译目录，编译文件如下：
双击.esriAddIn文件，添加工具到Arcmap中。打开Arcmap，打开扩展管理，command选项卡，找到Add-In Controls，这时候你会发现你编写的工具会出现在这一组里面。
点击[close]，点点试试……