C＃笔记 之 Oracle.ManagedDataAccess包的安装及配置

运行环境

• OS：windows10专业版
• Oracle：Oracle Database 12c Enterprise Edition Release
• C#：VisualStudio2015
• 目标架构：.NET Framework 4
• Oracle.ManagedDataAccess:v4.0.30319

设置解决方案属性：

设置解决方案的目标空间为.NET Framework 4。

添加Oracle.ManagedDataAccess包

选择 解决方案–引用–管理NuGat程序包–搜索Oracle.ManagedDataAccess。
注意：一定要匹配解决方案的.NET 版本号和数据库的版本号。

引用Oracle.ManagedDataAccess包

引用相关包：

using System.Configuration;
using Oracle.ManagedDataAccess.Types;
using Oracle.ManagedDataAccess.Client;

注意：引用System.Configuration是为了读取App.config配置。

修改App.config文件配置数据库

原始配置文件如下：

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <configSections>
    <section name="oracle.manageddataaccess.client"
      type="OracleInternal.Common.ODPMSectionHandler, Oracle.ManagedDataAccess, Version=4.121.2.0, Culture=neutral, PublicKeyToken=89b483f429c47342"/>
    </configSections>
    <startup> 
        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/>
    </startup>
    <system.data>
        <DbProviderFactories>
            <remove invariant="Oracle.ManagedDataAccess.Client"/>
            <add name="ODP.NET, Managed Driver" invariant="Oracle.ManagedDataAccess.Client" description="Oracle Data Provider for .NET, Managed Driver"
                type="Oracle.ManagedDataAccess.Client.OracleClientFactory, Oracle.ManagedDataAccess, Version=4.121.2.0, Culture=neutral, PublicKeyToken=89b483f429c47342"/>
        </DbProviderFactories>
    </system.data>
    <runtime>
        <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
            <dependentAssembly>
                <publisherPolicy apply="no"/>
                <assemblyIdentity name="Oracle.ManagedDataAccess" publicKeyToken="89b483f429c47342" culture="neutral"/>
                <bindingRedirect oldVersion="4.121.0.0 - 4.65535.65535.65535" newVersion="4.121.2.0"/>
            </dependentAssembly>
        </assemblyBinding>
    </runtime>
    <oracle.manageddataaccess.client>
        <version number="*">
            <dataSources>
                <dataSource alias="SampleDataSource"
                    descriptor="(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=localhost)(PORT=1521))(CONNECT_DATA=(SERVICE_NAME=orcl))) "/>
            </dataSources>
        </version>
    </oracle.manageddataaccess.client>
</configuration>

修改Oracle数据库链接：

    <oracle.manageddataaccess.client>
        <version number="*">
            <dataSources>
                <dataSource alias="SampleDataSource"
                    descriptor="(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=localhost)(PORT=1521))(CONNECT_DATA=(SERVICE_NAME=orcl))) "/>
            </dataSources>
        </version>
    </oracle.manageddataaccess.client>

将HOST,PORT,SERVICE_NAME按实际情况做修改即可。
如要连接：10.0.0.110：1521/test
修改如下：

    <oracle.manageddataaccess.client>
       <version number="*">
           <dataSources>
               <dataSource alias="SampleDataSource"
                   descriptor="(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=10.0.0.110)(PORT=1521))(CONNECT_DATA=(SERVICE_NAME=test))) "/>
           </dataSources>
       </version>
   </oracle.manageddataaccess.client>

添加用户配置
指定默认用户、密码及连接字符串“SampleDataSource”。

  <appSettings>
    <add key="connectionString"
         value="Data Source=SampleDataSource;User ID=hardware;Password=123456;Persist Security Info=True"/>
  </appSettings>

读取配置文件

private static readonly string conn_Str = ConfigurationManager.AppSettings["connectionString"];
private static OracleConnection conn_Oracle = new OracleConnection(conn_Str);

简单示例

namespace HnxhHardware
{
    class OracleHelper
    {
        // 读取数据库配置文件
        private static readonly string conn_Str = ConfigurationManager.AppSettings["connectionString"];
        private static OracleConnection conn_Oracle = new OracleConnection(conn_Str);

        // 判断连接状态
        private Boolean connectOracle()
        {
            if (conn_Oracle.State == ConnectionState.Open)
            {
                return true;
            }
            else
            {
                try
                {
                    conn_Oracle.Open();
                    return true;
                }
                catch(Exception ex)
                {
                    Console.WriteLine(ex.Message);
                    return false;
                }
            }
        }

        // 断开连接
        private Boolean disconnectOracle()
            {
                if (conn_Oracle.State == ConnectionState.Open)
                {
                    conn_Oracle.Close();
                    return true;
                }
                else
            {
                try
                {
                    conn_Oracle.Close();
                    return true;
                }
                catch(Exception ex)
                {
                    Console.WriteLine(ex.Message);
                    return false;
                }
            }
                
        }

		// 根据Account获取用户名称
        public string getUserName(string userid)
        {
            if (connectOracle())
            {
                OracleParameter para_userid = new OracleParameter("p_userid", OracleDbType.NVarchar2,200);
                para_userid.Direction = ParameterDirection.Input;
                para_userid.Value = userid;
                OracleParameter para_username = new OracleParameter("username", OracleDbType.NVarchar2,200);
                para_username.Direction = ParameterDirection.ReturnValue;

                OracleCommand comm = new OracleCommand(@"pk16_hardware.getusername", conn_Oracle);
                comm.CommandType = CommandType.StoredProcedure;
                comm.Parameters.Add(para_username);
                comm.Parameters.Add(para_userid);
                comm.ExecuteNonQuery();
                string uu = para_username.Value.ToString();
                if (uu == "null")
                {
                    return "用户不存在，请重试";
                }
                else
                {
                    return uu;
                }              
            }
            else
            {
                return "数据库打开失败";
            }
        }        
    }
}