c#访问Oracle数据库,执行数据库操作

第一步:应用服务器安装Oracle11g客户端

第二步:在Oracle数据库中新增表:

c#访问Oracle数据库,执行数据库操作_第1张图片

第三步,在C#程序中访问数据库进行数控操作:

在程序中引用:System.Data.OracleClient

1.执行sql 语句返回受影响的行数:

//执行sql 语句返回受影响的行数
new MyOracleDBHelper().ExecuteNonQuery("insert into tb_user(userid,username) values (2,'张三');");

2.执行存储过程,返回受影响的行数

在Oracle数据库中新增存储过程:

create or replace
procedure padduser(v_ID IN NUMBER, v_NAME IN VARCHAR2) is
begin
      insert into tb_user(userid, username) values(v_ID, v_NAME);
end padduser;
调用:

OracleParameter[] param1 = new OracleParameter[2];
param1[0] = new OracleParameter("v_ID", 6);
param1[1] = new OracleParameter("v_NAME", "test123456");
new MyOracleDBHelper().ExecuteNonQuery("padduser", param1);

3.执行SQL语句,返回DataSet

DataSet ds1 = new MyOracleDBHelper().ExecuteDataSet("select USERID,USERNAME from TB_USER t ORDER BY t.userid asc");
foreach (DataRow item in ds1.Tables[0].Rows)
{
    System.Console.WriteLine(string.Format("{0}:{1}", item["USERID"].ToString(), item["USERNAME"].ToString()));
}

4.执行存储过程,返回DataSet

在Oracle数据库中新增存储过程:

create or replace
procedure Demo(data out sys_refcursor) as
begin
   open data for select* from tb_user;
end Demo;
调用:

OracleParameter[] param2 = new OracleParameter[1];
param2[0] = new OracleParameter("data", OracleType.Cursor);
param2[0].Direction = ParameterDirection.Output;
DataSet ds2 = new MyOracleDBHelper().ExecuteDataSet("Demo", param2);
foreach (DataRow item in ds2.Tables[0].Rows)
{
    System.Console.WriteLine(string.Format("{0}:{1}", item["USERID"].ToString(), item["USERNAME"].ToString()));
}

附MyOracleDBHelper.cs:

    public class MyOracleDBHelper
    {
        //private static readonly string OracleConnStr = ConfigurationManager.AppSettings["TEST_OracleConnStr"];
        private static readonly string OracleConnStr = "Data Source=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=10.0.0.217)(PORT=1521))(CONNECT_DATA=(SERVICE_NAME=ORCL)));Persist Security Info=True;User ID=system;Password=System123456;";

        /// 
        /// 执行SQL语句
        /// 
        /// 
        /// 返回受影响的行数
        public int ExecuteNonQuery(string strSql)
        {
            int result = 0;
            using (OracleConnection con=new OracleConnection (OracleConnStr))
            {
                if (con.State == System.Data.ConnectionState.Closed)
                    con.Open();
                using (OracleCommand cmd = new OracleCommand(strSql, con))
                {
                    result = cmd.ExecuteNonQuery();
                }

                con.Close();
            }
            return result;
        }

        /// 
        /// 执行存储过程
        /// 
        /// 
        /// 
        /// 返回受影响的行数
        public int ExecuteNonQuery(string strProcedure, OracleParameter[] param)
        {
            int result = 0;
            using (OracleConnection con = new OracleConnection(OracleConnStr))
            {
                if (con.State == System.Data.ConnectionState.Closed)
                    con.Open();
                using (OracleCommand cmd=new OracleCommand())
                {
                    cmd.CommandType = System.Data.CommandType.StoredProcedure;
                    cmd.CommandText = strProcedure;
                    cmd.Connection = con;

                    foreach (var item in param)
                    {
                        cmd.Parameters.Add(item);
                    }

                    result = cmd.ExecuteNonQuery();
                }

                con.Close();
            }
            return result;
        }

        /// 
        /// 执行SQL语句
        /// 
        /// 
        /// 返回DataSet 结果集
        public DataSet ExecuteDataSet(string strSql)
        {
            using (DataSet ds = new DataSet())
            {
                using (OracleConnection con = new OracleConnection(OracleConnStr))
                {
                    if (con.State == ConnectionState.Closed)
                        con.Open();
                    using (OracleCommand cmd = new OracleCommand(strSql, con))
                    {
                        using (OracleDataAdapter sda = new OracleDataAdapter())
                        {
                            sda.SelectCommand = cmd;
                            sda.Fill(ds);
                        }
                    }

                    con.Close();
                }

                return ds;
            }
        }

        /// 
        /// 执行存储过程
        /// 
        /// 
        /// 
        /// 返回DataSet 结果集
        public DataSet ExecuteDataSet(string strProcedure, OracleParameter[] param)
        {
            using (DataSet ds=new DataSet ())
            {
                using (OracleConnection con = new OracleConnection(OracleConnStr))
                {
                    if (con.State == ConnectionState.Closed)
                        con.Open();

                    using (OracleCommand cmd=new OracleCommand ())
                    {
                        cmd.CommandType = CommandType.StoredProcedure;
                        cmd.CommandText = strProcedure;
                        cmd.Connection = con;

                        foreach (var item in param)
                        {
                            cmd.Parameters.Add(item);
                        }

                        using (OracleDataAdapter dap=new OracleDataAdapter ())
                        {
                            dap.SelectCommand = cmd;
                            dap.Fill(ds);
                        }
                    }

                    con.Close();
                }

                return ds;
            }
        }
    }

附程序代码:

class Program
    {
        static void Main(string[] args)
        {
            try
            {
                //执行sql 语句返回受影响的行数
                new MyOracleDBHelper().ExecuteNonQuery("insert into tb_user(userid,username) values (2,'张三');");

                //执行存储过程,返回受影响的行数
                //create or replace
                //procedure padduser(v_ID IN NUMBER, v_NAME IN VARCHAR2) is
                //begin
                //    insert into tb_user(userid, username) values(v_ID, v_NAME);
                //end padduser;

                OracleParameter[] param1 = new OracleParameter[2];
                param1[0] = new OracleParameter("v_ID", 6);
                param1[1] = new OracleParameter("v_NAME", "test123456");
                new MyOracleDBHelper().ExecuteNonQuery("padduser", param1);


                //执行SQL语句,返回DataSet
                DataSet ds1 = new MyOracleDBHelper().ExecuteDataSet("select USERID,USERNAME from TB_USER t ORDER BY t.userid asc");
                foreach (DataRow item in ds1.Tables[0].Rows)
                {
                    System.Console.WriteLine(string.Format("{0}:{1}", item["USERID"].ToString(), item["USERNAME"].ToString()));
                }

                //执行存储过程,返回DataSet
                //create or replace
                //procedure Demo(data out sys_refcursor) as
                //begin
                //  open data for select* from tb_user;
                //end Demo;
                OracleParameter[] param2 = new OracleParameter[1];
                param2[0] = new OracleParameter("data", OracleType.Cursor);
                param2[0].Direction = ParameterDirection.Output;
                DataSet ds2 = new MyOracleDBHelper().ExecuteDataSet("Demo", param2);
                foreach (DataRow item in ds2.Tables[0].Rows)
                {
                    System.Console.WriteLine(string.Format("{0}:{1}", item["USERID"].ToString(), item["USERNAME"].ToString()));
                }

            }
            catch (Exception ex)
            {
                System.Console.WriteLine(ex.Message);
            }

            System.Console.Read();
        }
    }

C#针对Oracle数据库的简单常见操作完成!





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