通过C#连接到Oracle数据库？

Question

我需要通过Visual Studio 2010连接到Oracle DB(外部).但我不想在我的机器上安装Oracle.在我的项目中,我引用了:System.Data.OracleClient.但它没有满足需要.我有一个"Oracle SQL Developer IDE",我在其中运行针对oracle db的SQL查询.

到目前为止我有这个代码:

 private static string GetConnectionString()
    {
        String connString = "host= serverName;database=myDatabase;uid=userName;pwd=passWord";
        return connString;
    }

 private static void ConnectingToOracle()
    {
        string connectionString = GetConnectionString();
        using (OracleConnection connection = new OracleConnection())
        {
            connection.ConnectionString = connectionString;
            connection.Open();
            Console.WriteLine("State: {0}", connection.State);
            Console.WriteLine("ConnectionString: {0}",
                              connection.ConnectionString);

            OracleCommand command = connection.CreateCommand();
            string sql = "SELECT * FROM myTableName";
            command.CommandText = sql;

            OracleDataReader reader = command.ExecuteReader();
            while (reader.Read())
            {
                string myField = (string)reader["MYFIELD"];
                Console.WriteLine(myField);
            }
        }
    }

到目前为止,我读了这些博客:

http://st-curriculum.oracle.com/tutorial/DBXETutorial/index.htm

http://blogs.msdn.com/b/kaevans/archive/2009/07/18/connecting-to-oracle-from-visual-studio.aspx

到目前为止,我还没有从Oracle下载任何东西.我应该采取什么措施来实现这一目标？

Answer 1

首先,您需要从此站点下载并安装ODP http://www.oracle.com/technetwork/topics/dotnet/index-085163.html

安装后添加程序集Oracle.DataAccess.dll的引用.

你很高兴去追求这个.

using System; 
using Oracle.DataAccess.Client; 

class OraTest
{ 
    OracleConnection con; 
    void Connect() 
    { 
        con = new OracleConnection(); 
        con.ConnectionString = "User Id=<username>;Password=<password>;Data Source=<datasource>"; 
        con.Open(); 
        Console.WriteLine("Connected to Oracle" + con.ServerVersion); 
    }

    void Close() 
    {
        con.Close(); 
        con.Dispose(); 
    } 

    static void Main() 
    { 
        OraTest ot= new OraTest(); 
        ot.Connect(); 
        ot.Close(); 
    } 
}

Answer 2

您也可以使用Oracle.ManagedDataAccess NuGet包(.NET> = 4.0,数据库> = 10g第2版).

Answer 3

使用Nuget

1. 右键单击项目，选择 Manage NuGet packages...
2. 选择Browse选项卡，搜索Oracle并安装Oracle.ManagedDataAccess

3. 在代码中，使用以下命令（Ctrl+ .自动添加using指令）。

4. 注意，与Java相比，不同的DataSource字符串是不同的。

   // create connection
   OracleConnection con = new OracleConnection();
   
   // create connection string using builder
   OracleConnectionStringBuilder ocsb = new OracleConnectionStringBuilder();
   ocsb.Password = "autumn117";
   ocsb.UserID = "john";
   ocsb.DataSource = "database.url:port/databasename";
   
   // connect
   con.ConnectionString = ocsb.ConnectionString;
   con.Open();
   Console.WriteLine("Connection established (" + con.ServerVersion + ")");