"ARCGIS-ENGINE二次开发常用代码：生成面及文件操作"

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本文是关于ARCGIS-ENGINE二次开发常用代码的总结。在安装好ARCENGINE插件的VS中运行，可以使用以下常见的代码： 1. 生成面的代码： ```csharp if (m_pFeatureLayer.FeatureClass.ShapeType == esriGeometryType.esriGeometryPolygon) { IPointCollection m_pPointCollection = new PolygonClass(); object missing = Type.Missing; int icount = newFeature.XLIST.Count; if (icount < 3) return; for (int i = 0; i < icount; i++) { IPoint point = new PointClass(); point.PutCoords(newFeature.XLIST, newFeature.YLIST); m_pPointCollection.AddPoint(point, ref missing, ref missing); } IPolygon m_pPolygon = m_pPointCollection; } ``` 2. 文件打开、保存等常见代码： (这个部分没有提供具体的代码，只是说明了可以在ARCGIS-ENGINE二次开发中使用文件打开、保存等常见代码) 通过以上代码可以看出，ARCGIS-ENGINE二次开发常用代码涉及到生成面、文件打开、保存等操作。开发者可以根据自己的需求和项目要求，合理运用这些代码，进行二次开发，实现与ARCGIS相关的功能。总之，ARCGIS-ENGINE二次开发常用代码对于需要在其开发环境下进行二次开发的开发者来说，是非常有用的资源。通过熟练掌握并灵活运用这些常用代码，可以帮助开发者更加高效地完成开发任务，提高开发效率，同时也为项目的顺利实施提供了有力支持。希望本文对对于ARCGIS-ENGINE二次开发常用代码的理解和应用有所帮助。

}

break;

case "ZoomOut":

{

ICommand command = new ControlsSceneZoomOutTool();

command.OnCreate(this.axSceneControl1.Object);

this.axSceneControl1.CurrentTool = command as ESRI.ArcGIS.SystemUI.ITool;

}

break;

case "Pan":

{

ICommand command = new ControlsScenePanTool();

command.OnCreate(this.axSceneControl1.Object);

this.axSceneControl1.CurrentTool = command as ESRI.ArcGIS.SystemUI.ITool;

}

break;

case "Navigate":

{

ICommand command = new ControlsSceneNavigateTool();

command.OnCreate(this.axSceneControl1.Object);

this.axSceneControl1.CurrentTool = command as ESRI.ArcGIS.SystemUI.ITool;

10. C# ACCESS�� ݿ�

using System.Data.OleDb

public string myConnstring="Provider=Microsoft.Jet.OLEDB.4.0;

Data Source="+HttpContext.Current.Server.MapPath("data.mdb"); //data.mdb��

ݿ��

OleDbConnection MyConnection;

MyConnection = new OleDbConnection(myConnstring);

strInsert=""; //strinsert sql��

OleDbCommand MyCommand = new OleDbCommand(strInsert,MyConnection);

MyConnection.Open();

MyCommand.ExecuteNonQuery();

MyConnection.Close();

11. ļ word // ļ System.Object Nothing = ��

System.Reflection.Missing.Value; Directory.CreateDirectory("c:/CNSI");

// ļ Ŀ¼ string name = "CNSI_" + DateTime.Now.ToLongDateString() + ��

".doc"; object filename = "c://CNSI//" + name; // ļ ·� ��

// Word ĵ Microsoft.Office.Interop.Word.Application WordApp = new ��

Microsoft.Office.Interop.Word.ApplicationClass();

Microsoft.Office.Interop.Word.Document WordDoc = WordApp.Documents.Add(ref

Nothing, ref Nothing, ref Nothing, ref Nothing); IQueryFilter pQueryFilter;

pQueryFilter = pFeatureWorkspace;

ĵ string name = "y00"; object filename = "c://CNSI//" + ��

name;// ļ · object Nothing = System.Reflection.Missing.Value; ��

//Microsoft.Office.Interop.Word.Application WordApp = new

Microsoft.Office.Interop.Word.ApplicationClass();

Microsoft.Office.Interop.Word.Document WordDocs = WordApp.Documents.Add(ref

Nothing, ref Nothing, ref Nothing, ref Nothing); WordDocs.Close(ref Nothing, ref

Nothing, ref Nothing); WordApp.Quit(ref Nothing, ref Nothing, ref Nothing);

WordDocs.SaveAs(ref filename, ref Nothing, ref Nothing, ref Nothing, ref

Nothing, ref Nothing, ref Nothing, ref Nothing, ref Nothing, ref Nothing, ref

Nothing, ref Nothing, ref Nothing, ref Nothing, ref Nothing, ref Nothing);

//WordApp.Quit(ref Nothing, ref Nothing, ref Nothing); message = name +

" ĵ ɳɹ� �� Ա��浽 C:CNSI "; hy catch { message = " ļ�� 쳣��"; } string path =

"E:\\yxl\\tianjia\\database2.mdb"; IWorkspace iW =

AccessWorkspaceFromPropertySet(path); IFeatureWorkspace pFeatureWorkspace =

(IFeatureWorkspace)iW; ITable pTable = pFeatureWorkspace.OpenTable("database2");

12. C# Access�� ݿ�ķ��

//ȡ public OleDbConnection getConn() { ConnectDatabase connstr=new ��

ConnectDatabase(); string connStr=connstr.GetConnectionString(); OleDbConnection

oledb=new OleDbConnection(connStr); return oledb; }

1 OleDbCommand,OleDbDataReader�� ݿ�

1. ѯ��

public User getUserFromName(string Searchname) { User tempUser=new User(); try {

OleDbConnection oleconn=getConn();//��ݿ �� string strSel="select * from MyUser

where UserName='"+Searchname+"'";// ѯ OleDbCommand myCommand=new ��

OleDbCommand(strSel,oleconn);// ѯ oleconn.Open();//�� ݿ ��

OleDbDataReader reader; reader=myCommand.ExecuteReader();//ִ�в ѯ ꣺꣺꣺꣺� �� ؼ�¼ ��

if(reader.Read()) { tempUser.ID=(int)reader["UserID"];

tempUser.Name=reader["UserName"].ToString();

tempUser.Salary=(float)reader["UserSalary"];

tempUser.Password=reader["UserPassword"].ToString();

tempUser.Memo=reader["UserMemo"].ToString();

tempUser.Birthday=(DateTime)reader["UserBirthday"];

tempUser.Address=reader["UserAddress"].ToString(); } else

{ throw new Exception("û м ¼"); } reader.Close();//� � �ر ¼ oleconn.Close();//ռ� ��

ر��

} catch(Exception e) { throw new Exception("��ݿ��"+e.Message); } return

tempUser; }

2. ¼��

public void InsertUser(User insertuser) { try { OleDbConnection

oleconn=getConn();//��ݿ �� oleconn.Open();//��ݿ �� string strSel="insert

into [MyUser]([UserName],[UserPassword],

[UserSalary],[UserAddress],[UserBirthday],[UserMemo])"; // strSel+=" ��

values

('"+insertuser.Name+"','"+insertuser.Password+"',"+insertuser.Salary.ToSt

ring(); strSel+=",'"+insertuser.Address+"',#"+insertuser.Birthday.ToString()

+"#,'"+insertuser.Memo+"')"; OleDbCommand myCommand=new

OleDbCommand(strSel,oleconn);// ѯ myCommand.ExecuteNonQuery(); ��

oleconn.Close();//�ر��

} catch(Exception e) { throw new Exception("��ݿ��"+e.Message); } }

3.ɾ ¼��

public void DeleteUser(int m_id) { try { OleDbConnection oleconn=getConn();

oleconn.Open(); string strSel="Delete From [Myuser] where

UserID="+m_id.ToString(); OleDbCommand myCommand=new

OleDbCommand(strSel,oleconn); myCommand.ExecuteNonQuery(); oleconn.Close(); }

catch(Exception e) { throw new Exception("ɾ ¼ "+e.Message); } }��

2 OleDbDataAdapter,OleDbCommandBuilder,DataSet,DataTable,DataRow��

��ݿ�

Ӽ ¼��

public void InsertUserA(User insertUser) { using(OleDbConnection conn=getConn())

{ OleDbDataAdapter adapter = new OleDbDataAdapter(); string queryString="Select

* from MyUser order by UserID"; adapter.SelectCommand = new

OleDbCommand(queryString, conn);

OleDbCommandBuilder builder = new OleDbCommandBuilder(adapter); //

builder.QuotePrefix="["; // builder.QuoteSuffix="]"; conn.Open();

DataSet users = new DataSet(); adapter.Fill(users,"MyUser"); DataTable dt=new

DataTable(); dt=users.Tables["MyUser"]; DataRow r=dt.NewRow();

r["UserName"]=insertUser.Name; r["UserPassword"]=insertUser.Password;

r["UserAddress"]=insertUser.Address; r["UserSalary"]=insertUser.Salary;

r["UserBirthday"]=insertUser.Birthday; r["UserMemo"]=insertUser.Memo;

dt.Rows.Add(r); adapter.Update(users, "MyUser");

} }

Ҫ�� ע�� ֶβ��꣺ؼ ꣺꣺꣺꣺꣺꣺꣺꣺꣺꣺�� Insert into ʾ�� 취��

ǰһƪ

(3) ò ѯ ķ ʽ��

public class AccessUtil { public AccessUtil() { } private string connString;

public string ConnString {

get { return connString; } set { connString = value; } } public

AccessUtil(string connstr) { this.connString = connstr; }

// Ĳ ,�� ֵΪid�ؼ��ֵ�ֵ, public int ExecuteInsert(string SQL, ��

OleDbParameter[]

parameters) { using(OleDbConnection conn=new OleDbConnection(connString))

{ OleDbCommand cmd = new OleDbCommand(SQL, conn); try { conn.Open(); if

(parameters!=null) { cmd.Parameters.AddRange(parameters); }

cmd.ExecuteNonQuery(); cmd.CommandText = @"Select @@identity"; int value =

Int32.Parse(cmd.ExecuteScalar().ToString

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