C# 连接Oracle，进行查询，插入操作

注：OracleConnection和OracleCommand已被标注为[弃用的]，可以使用System.Data.OleDb.OleDbConnection代替OracleCOnnection，使用System.Data.OleDb.OleDbCommand代替OracleCommand，并在连接字符串中的ConnectionString属性里增加"Provider=OraOLEDB.Oracle;"。

首先是在Oracle数据库中创建表：

Create Table Student(
       S_ID VARCHAR2(40) default sys_guid() primary key,
       STUDENT_ID CHAR(12),
       STUDENT_Name VARCHAR2(20),
       STUDENT_AGE VARCHAR2(10),
       STUDENT_SEX VARCHAR2(10)
)

接着在配置文件中加入Oracle连接字符串：

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <connectionStrings>
　　<!--使用OleDbConnection时用该连接字符串-->
    <!--<add name="DeviceDBConnection" connectionString="Provider=OraOLEDB.Oracle;User ID=JPVDS;Password=JPVDS_2015;Data Source=(DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST=16.130.2.14)(PORT=1521)))(CONNECT_DATA=(SERVICE_NAME=myorcl)))"
         providerName="System.Data.OracleClient"/>-->
    <add name="DefaultDBConnection" connectionString="User ID=JPVDS;Password=JPVDS_2015;Data Source=(DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST=16.130.2.14)(PORT=1521)))(CONNECT_DATA=(SERVICE_NAME=myorcl)))"
     providerName="System.Data.OracleClient"/>
  </connectionStrings>
    <startup>
        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2" />
    </startup>
</configuration>

然后是读取配置文件，连接数据库，进行增删改查操作，本人比较懒，直接贴代码了。

public class Program
{
    //读取数据库连接字符串
    string OracleStr = ConfigurationManager.ConnectionStrings["DefaultDBConnection"].ToString();
    OracleConnection conn;

    /// <summary>
    /// 连接数据库
    /// </summary>
    /// <param name="oracleStr">数据库连接字符串</param>
    /// <returns></returns>
    public OracleConnection ConnectionDB(string oracleStr)
    {
        OracleConnection conn = null;
        try
        {
            conn = new OracleConnection(OracleStr);
            //打开数据库
            conn.Open();
        }
        catch (Exception ex)
        {

        }
        return conn;
    }

    /// <summary>
    /// 插入操作
    /// </summary>
    /// <param name="student">需要插入的对象</param>
    public void Insert(Student student)
    {
        string insertSqlStr = "insert into Student(Student_Id, Student_Name, Student_Age, Student_Sex)values(:Student_Id,:Student_Name,:Student_Age,:Student_Sex)";
        try
        {
            OracleCommand cmd = new OracleCommand(insertSqlStr, conn);
            cmd.Parameters.AddWithValue("Student_Id", student.student_Id);
            cmd.Parameters.AddWithValue("Student_Name", student.student_Name);
            cmd.Parameters.AddWithValue("Student_Age", student.student_Age);
            cmd.Parameters.AddWithValue("Student_Sex", student.student_Sex);
            cmd.ExecuteNonQuery();
            Console.WriteLine(string.Format("添加{0}成功!", student.student_Name));
        }
        catch(Exception ex)
        {
            Console.WriteLine(string.Format("添加{0}失败!", student.student_Name));
        }
    }

    /// <summary>
    /// 查询操作，查询全部内容
    /// </summary>
    /// <returns>返回学生列表</returns>
    public List<Student> Query()
    {
        string querySqlStr = "select * from student";
        List<Student> studentList = new List<Student>();
        try
        {
            OracleCommand cmd = new OracleCommand(querySqlStr, conn);
            using (var dr = cmd.ExecuteReader())
            {
                while (dr.Read())
                {
                    Student student = new Student(dr.GetValue().ToString(), dr.GetValue().ToString(),
                        dr.GetValue().ToString(), dr.GetValue().ToString());
                    studentList.Add(student);
                }
            }
        }
        catch (Exception ex) { }
        return studentList;
    }

    /// <summary>
    /// 操作
    /// </summary>
    public void operation()
    {
        conn = ConnectionDB(OracleStr);
        Student student1 = new Student("", "", "", "男");
        Student student2 = new Student("", "香蕉", "", "男");
        Insert(student1);
        Insert(student2);
        List<Student> studentList = Query();
        foreach(var student in studentList)
        {
            Console.WriteLine("~~~~~~~~~~~~~~~~");
            Console.WriteLine(string.Format("学号:{0}",student.student_Id));
            Console.WriteLine(string.Format("姓名:{0}",student.student_Name));
            Console.WriteLine(string.Format("年龄:{0}",student.student_Age));
            Console.WriteLine(string.Format("性别:{0}",student.student_Sex));
        }
        conn.Close();
    }

    static void Main(string[] args)
    {
        Program program = new Program();
        program.operation();
    }
}

Student学生类

/// <summary>
/// 学生类
/// </summary>
public class Student
{
    /// <summary>
    /// ID
    /// </summary>
    public string id { get; set; }

    /// <summary>
    /// 学生学号
    /// </summary>
    public string student_Id { get; set; }

    /// <summary>
    /// 学生姓名
    /// </summary>
    public string student_Name { get; set; }

    /// <summary>
    /// 学生年龄
    /// </summary>
    public string student_Age { get; set; }

    /// <summary>
    /// 学生性别
    /// </summary>
    public string student_Sex { get; set; }

    public Student() { }

    public Student(string s_Id,string s_Name,string s_Age,string s_Sex)
    {
        this.student_Id = s_Id;
        this.student_Name = s_Name;
        this.student_Age = s_Age;
        this.student_Sex = s_Sex;
    }
}