C#

前言

通过VS2019建立WinFrm应用程序，搭建桌面程序后，通过封装数据库操作OracleHelper类和业务逻辑操作OracleSQL类，进而通过DataGridView实现对Oracle数据表的增删改查功能。

WinFrm桌面搭建

主要控件：GroupBox、Label、TextBox、Button和DataGridView。

如下图：

NuGet程序包管理 - Oracle.ManagedDataAccess.dll安装

通过NuGet程序包管理界面安装Oracle.managedDataAccess程序包，注意这里我安装的是12.1.24版本，高版本的不好用（坑太多，自己体会）。

安装完成后，Oracle.managedDataAccess.dll文件将会自动添加到Bin文件夹下。

核心代码

Oracle数据库操作封装类OracleHelper.cs

请看代码：

using System;
using System.Data;
using System.Collections.Generic;
using System.Configuration;
using Oracle.ManagedDataAccess.Client;
using System.Text;
using System.IO;

/// <summary>  
/// Oracle数据库操作类  
/// </summary>  
public static class OracleHelper
{
    //连接字符串
    public static string oraConnStr = "Data Source=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=172.0.0.0)(PORT=1521))(CONNECT_DATA=(SERVICE_NAME=testdb)));Persist Security Info=True;User ID=sa;Password=123";

    #region Oracle数据库操作通用方法
    /// <summary>
    /// 测试数据库连接是否正常
    /// </summary>
    /// <param name="strConn"></param>
    /// <returns></returns>
    public static bool CheckOracleConnect(string strConn)
    {
        try
        {
            OracleConnection conn = new OracleConnection();
            conn.ConnectionString = strConn;
            conn.Open();
            return true;
        }
        catch
        {
            return false;
        }
    }

    /// <summary>  
    /// 执行数据库非查询操作,返回受影响的行数  
    /// </summary>  
    /// <param name="connectionString">数据库连接字符串</param>
    /// <param name="cmdType">命令的类型</param>
    /// <param name="cmdText">Oracle存储过程名称或PL/SQL命令</param>  
    /// <param name="cmdParms">命令参数集合</param>  
    /// <returns>当前查询操作影响的数据行数</returns>  
    public static int ExecuteNonQuery(string connectionString, CommandType cmdType, string cmdText, params OracleParameter[] cmdParms)
    {
        OracleCommand cmd = new OracleCommand();
        using (OracleConnection conn = new OracleConnection(connectionString))
        {
            PrepareCommand(cmd, conn, null, cmdType, cmdText, cmdParms);
            int val = cmd.ExecuteNonQuery();
            cmd.Parameters.Clear();
            return val;
        }
    }

    /// <summary>  
    /// 执行数据库事务非查询操作,返回受影响的行数  
    /// </summary>  
    /// <param name="transaction">数据库事务对象</param>  
    /// <param name="cmdType">Command类型</param>  
    /// <param name="cmdText">Oracle存储过程名称或PL/SQL命令</param>  
    /// <param name="cmdParms">命令参数集合</param>  
    /// <returns>当前事务查询操作影响的数据行数</returns>  
    public static int ExecuteNonQuery(OracleTransaction trans, CommandType cmdType, string cmdText, params OracleParameter[] cmdParms)
    {
        OracleCommand cmd = new OracleCommand();
        PrepareCommand(cmd, trans.Connection, trans, cmdType, cmdText, cmdParms);
        int val = cmd.ExecuteNonQuery();
        cmd.Parameters.Clear();
        return val;
    }

    /// <summary>  
    /// 执行数据库非查询操作,返回受影响的行数  
    /// </summary>  
    /// <param name="connection">Oracle数据库连接对象</param>  
    /// <param name="cmdType">Command类型</param>  
    /// <param name="cmdText">Oracle存储过程名称或PL/SQL命令</param>  
    /// <param name="cmdParms">命令参数集合</param>  
    /// <returns>当前查询操作影响的数据行数</returns>  
    public static int ExecuteNonQuery(OracleConnection connection, CommandType cmdType, string cmdText, params OracleParameter[] cmdParms)
    {
        if (connection == null)
            throw new ArgumentNullException("当前数据库连接不存在");
        OracleCommand cmd = new OracleCommand();
        PrepareCommand(cmd, connection, null, cmdType, cmdText, cmdParms);
        int val = cmd.ExecuteNonQuery();
        cmd.Parameters.Clear();
        return val;
    }

    /// <summary>  
    /// 执行数据库查询操作,返回OracleDataReader类型的内存结果集  
    /// </summary>  
    /// <param name="connectionString">数据库连接字符串</param>
    /// <param name="cmdType">命令的类型</param>
    /// <param name="cmdText">Oracle存储过程名称或PL/SQL命令</param>  
    /// <param name="cmdParms">命令参数集合</param>  
    /// <returns>当前查询操作返回的OracleDataReader类型的内存结果集</returns>  
    public static OracleDataReader ExecuteReader(string connectionString, CommandType cmdType, string cmdText, params OracleParameter[] cmdParms)
    {
        OracleCommand cmd = new OracleCommand();
        OracleConnection conn = new OracleConnection(connectionString);
        try
        {
            PrepareCommand(cmd, conn, null, cmdType, cmdText, cmdParms);
            OracleDataReader reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
            cmd.Parameters.Clear();
            return reader;
        }
        catch
        {
            cmd.Dispose();
            conn.Close();
            throw;
        }
    }

    /// <summary>  
    /// 执行数据库查询操作,返回DataSet类型的结果集  
    /// </summary>  
    /// <param name="connectionString">数据库连接字符串</param>
    /// <param name="cmdType">命令的类型</param>
    /// <param name="cmdText">Oracle存储过程名称或PL/SQL命令</param>  
    /// <param name="cmdParms">命令参数集合</param>  
    /// <returns>当前查询操作返回的DataSet类型的结果集</returns>  
    public static DataSet ExecuteDataSet(string connectionString, CommandType cmdType, string cmdText, params OracleParameter[] cmdParms)
    {
        OracleCommand cmd = new OracleCommand();
        OracleConnection conn = new OracleConnection(connectionString);
        DataSet ds = null;
        try
        {
            PrepareCommand(cmd, conn, null, cmdType, cmdText, cmdParms);
            OracleDataAdapter adapter = new OracleDataAdapter();
            adapter.SelectCommand = cmd;
            ds = new DataSet();
            adapter.Fill(ds);
            cmd.Parameters.Clear();
        }
        catch
        {
            throw;
        }
        finally
        {
            cmd.Dispose();
            conn.Close();
            conn.Dispose();
        }

        return ds;
    }

    /// <summary>  
    /// 执行数据库查询操作,返回DataTable类型的结果集  
    /// </summary>  
    /// <param name="connectionString">数据库连接字符串</param>
    /// <param name="cmdType">命令的类型</param>
    /// <param name="cmdText">Oracle存储过程名称或PL/SQL命令</param>  
    /// <param name="cmdParms">命令参数集合</param>  
    /// <returns>当前查询操作返回的DataTable类型的结果集</returns>  
    public static DataTable ExecuteDataTable(string connectionString, CommandType cmdType, string cmdText, params OracleParameter[] cmdParms)
    {
        OracleCommand cmd = new OracleCommand();
        OracleConnection conn = new OracleConnection(connectionString);
        DataTable dt = null;

        try
        {
            PrepareCommand(cmd, conn, null, cmdType, cmdText, cmdParms);
            OracleDataAdapter adapter = new OracleDataAdapter();
            adapter.SelectCommand = cmd;
            dt = new DataTable();
            adapter.Fill(dt);
            cmd.Parameters.Clear();
        }
        catch
        {
            throw;
        }
        finally
        {
            cmd.Dispose();
            conn.Close();
            conn.Dispose();
        }

        return dt;
    }

    /// <summary>  
    /// 执行数据库查询操作,返回结果集中位于第一行第一列的Object类型的值  
    /// </summary>  
    /// <param name="connectionString">数据库连接字符串</param>
    /// <param name="cmdType">命令的类型</param>
    /// <param name="cmdText">Oracle存储过程名称或PL/SQL命令</param>  
    /// <param name="cmdParms">命令参数集合</param>  
    /// <returns>当前查询操作返回的结果集中位于第一行第一列的Object类型的值</returns>  
    public static object ExecuteScalar(string connectionString, CommandType cmdType, string cmdText, params OracleParameter[] cmdParms)
    {
        OracleCommand cmd = new OracleCommand();
        OracleConnection conn = new OracleConnection(connectionString);
        object result = null;
        try
        {
            PrepareCommand(cmd, conn, null, cmdType, cmdText, cmdParms);
            result = cmd.ExecuteScalar();
            cmd.Parameters.Clear();
        }
        catch
        {
            throw;
        }
        finally
        {
            cmd.Dispose();
            conn.Close();
            conn.Dispose();
        }

        return result;
    }

    ///    <summary>  
    ///    执行数据库事务查询操作,返回结果集中位于第一行第一列的Object类型的值  
    ///    </summary>  
    ///    <param name="trans">一个已存在的数据库事务对象</param>  
    ///    <param name="commandType">命令类型</param>  
    ///    <param name="commandText">Oracle存储过程名称或PL/SQL命令</param>  
    ///    <param name="cmdParms">命令参数集合</param>  
    ///    <returns>当前事务查询操作返回的结果集中位于第一行第一列的Object类型的值</returns>  
    public static object ExecuteScalar(OracleTransaction trans, CommandType cmdType, string cmdText, params OracleParameter[] cmdParms)
    {
        if (trans == null)
            throw new ArgumentNullException("当前数据库事务不存在");
        OracleConnection conn = trans.Connection;
        if (conn == null)
            throw new ArgumentException("当前事务所在的数据库连接不存在");

        OracleCommand cmd = new OracleCommand();
        object result = null;

        try
        {
            PrepareCommand(cmd, conn, trans, cmdType, cmdText, cmdParms);
            result = cmd.ExecuteScalar();
            cmd.Parameters.Clear();
        }
        catch
        {
            throw;
        }
        finally
        {
            trans.Dispose();
            cmd.Dispose();
            conn.Close();
            conn.Dispose();
        }

        return result;
    }

    /// <summary>  
    /// 执行数据库查询操作,返回结果集中位于第一行第一列的Object类型的值  
    /// </summary>  
    /// <param name="conn">数据库连接对象</param>  
    /// <param name="cmdType">Command类型</param>  
    /// <param name="cmdText">Oracle存储过程名称或PL/SQL命令</param>  
    /// <param name="cmdParms">命令参数集合</param>  
    /// <returns>当前查询操作返回的结果集中位于第一行第一列的Object类型的值</returns>  
    public static object ExecuteScalar(OracleConnection conn, CommandType cmdType, string cmdText, params OracleParameter[] cmdParms)
    {
        if (conn == null) throw new ArgumentException("当前数据库连接不存在");
        OracleCommand cmd = new OracleCommand();
        object result = null;

        try
        {
            PrepareCommand(cmd, conn, null, cmdType, cmdText, cmdParms);
            result = cmd.ExecuteScalar();
            cmd.Parameters.Clear();
        }
        catch
        {
            throw;
        }
        finally
        {
            cmd.Dispose();
            conn.Close();
            conn.Dispose();
        }

        return result;
    }

    /// <summary>  
    /// 执行数据库命令前的准备工作  
    /// </summary>  
    /// <param name="cmd">Command对象</param>  
    /// <param name="conn">数据库连接对象</param>  
    /// <param name="trans">事务对象</param>  
    /// <param name="cmdType">Command类型</param>  
    /// <param name="cmdText">Oracle存储过程名称或PL/SQL命令</param>  
    /// <param name="cmdParms">命令参数集合</param>  
    private static void PrepareCommand(OracleCommand cmd, OracleConnection conn, OracleTransaction trans, CommandType cmdType, string cmdText, OracleParameter[] cmdParms)
    {
        if (conn.State != ConnectionState.Open)
            conn.Open();

        cmd.Connection = conn;
        cmd.CommandText = cmdText;

        if (trans != null)
            cmd.Transaction = trans;

        cmd.CommandType = cmdType;

        if (cmdParms != null)
        {
            foreach (OracleParameter parm in cmdParms)
                cmd.Parameters.Add(parm);
        }
    }

    /// <summary>  
    /// 将.NET日期时间类型转化为Oracle兼容的日期时间格式字符串  
    /// </summary>  
    /// <param name="date">.NET日期时间类型对象</param>  
    /// <returns>Oracle兼容的日期时间格式字符串（如该字符串：TO_DATE('2007-12-1','YYYY-MM-DD')）</returns>  
    public static string GetOracleDateFormat(DateTime date)
    {
        return "TO_DATE('" + date.ToString("yyyy-M-dd") + "','YYYY-MM-DD')";
    }

    /// <summary>  
    /// 将.NET日期时间类型转化为Oracle兼容的日期格式字符串  
    /// </summary>  
    /// <param name="date">.NET日期时间类型对象</param>  
    /// <param name="format">Oracle日期时间类型格式化限定符</param>  
    /// <returns>Oracle兼容的日期时间格式字符串（如该字符串：TO_DATE('2007-12-1','YYYY-MM-DD')）</returns>  
    public static string GetOracleDateFormat(DateTime date, string format)
    {
        if (format == null || format.Trim() == "") format = "YYYY-MM-DD";
        return "TO_DATE('" + date.ToString("yyyy-M-dd") + "','" + format + "')";
    }

    /// <summary>  
    /// 将指定的关键字处理为模糊查询时的合法参数值  
    /// </summary>  
    /// <param name="source">待处理的查询关键字</param>  
    /// <returns>过滤后的查询关键字</returns>  
    public static string HandleLikeKey(string source)
    {
        if (source == null || source.Trim() == "") return null;

        source = source.Replace("[", "[]]");
        source = source.Replace("_", "[_]");
        source = source.Replace("%", "[%]");

        return ("%" + source + "%");
    }
    #endregion
}

业务逻辑封装类OracleSQL.cs

请看代码：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _004___VS2019连接Oracle数据库并实现数据库表的增删改查
{
    /// <summary>
    /// 业务逻辑类，主要封装SQL语句
    /// </summary>
    class OracleSQL
    {
        // 查询表数据
        public static string GetWZJPerson = "select * from wzj_person where name =:name order by syid";
        // 模糊查询表数据
        public static string GerWZJPersonLike = "select * from wzj_person where name like :name order by syid";
        // 根据syid删除数据
        public static string DeleteWZJPersonData = "delete from wzj_person where syid = :syid";
        // 添加数据
        public static string InsertWZJPersonData = "insert into wzj_person(name, age, birthday, syid, ptoneno, workno, address) values(:name, :age, :birthday, :syid, :ptoneno, :workno, :address) ";
        // 更新数据
        public static string UpdateWZJPersonData = "update wzj_person set name=:name, age=:age, birthday=:birthday, ptoneno=:ptoneno, workno=:workno, address=:address where syid =:syid";
    }
}

 增删改查

        /// <summary>
        /// 启用编辑、添加
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnAdd_Click(object sender, EventArgs e)
        {
            // 启用编辑
            dgvMain.ReadOnly = false;
            // 滚动到最后一行
            this.dgvMain.FirstDisplayedScrollingRowIndex = this.dgvMain.Rows.Count - 1;
            // 选中最后一行
            this.dgvMain.Rows[this.dgvMain.Rows.Count - 1].Selected = true;
        }

        /// <summary>
        /// 删除某一行，同步删除数据库表
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnDelete_Click(object sender, EventArgs e)
        {
            // 获取选中行
            int strRowIdex = dgvMain.CurrentCell.RowIndex;
            // 获取strSyID
            string strSyID = dgvMain.Rows[strRowIdex].Cells["SyID"].Value.ToString();
            // 创建参数对象
            OracleParameter[] param = new OracleParameter[] { new OracleParameter(":SyID", OracleDbType.Varchar2) };
            param[0].Value = strSyID;
            // 删除数据库表
            int i = OracleHelper.ExecuteNonQuery(OracleHelper.oraConnStr, CommandType.Text, OracleSQL.DeleteWZJPersonData, param);
            // 移除选中行
            dgvMain.Rows.RemoveAt(strRowIdex);
            // 消息提示
            MessageBox.Show("删除成功！", "提示");

        }

        /// <summary>
        /// 保存添加的数据
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnPost_Click(object sender, EventArgs e)
        {
            // 获取选中行
            int strRowIdex = dgvMain.CurrentCell.RowIndex;
            // 创建参数对象 name, age, birthday, syid, ptoneno, workno, address
            OracleParameter[] param = new OracleParameter[] {
                new OracleParameter(":name", OracleDbType.Varchar2),
                new OracleParameter(":age", OracleDbType.Int32),
                new OracleParameter(":birthday", OracleDbType.Date),
                new OracleParameter(":syid", OracleDbType.Varchar2),
                new OracleParameter(":ptoneno", OracleDbType.Varchar2),
                new OracleParameter(":workno", OracleDbType.Varchar2),
                new OracleParameter(":address", OracleDbType.Varchar2)
            };
            param[0].Value = dgvMain.Rows[strRowIdex].Cells["name"].Value;
            param[1].Value = dgvMain.Rows[strRowIdex].Cells["age"].Value;
            param[2].Value = dgvMain.Rows[strRowIdex].Cells["birthday"].Value;
            param[3].Value = dgvMain.Rows[strRowIdex].Cells["syid"].Value;
            param[4].Value = dgvMain.Rows[strRowIdex].Cells["ptoneno"].Value;
            param[5].Value = dgvMain.Rows[strRowIdex].Cells["workno"].Value;
            param[6].Value = dgvMain.Rows[strRowIdex].Cells["address"].Value;

            // 插入数据库表
            int i = OracleHelper.ExecuteNonQuery(OracleHelper.oraConnStr, CommandType.Text, OracleSQL.InsertWZJPersonData, param);
            // 消息提示
            MessageBox.Show("保存成功！", "提示");
        }

        /// <summary>
        /// 更新DataGridView选中行数据
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnUpdate_Click(object sender, EventArgs e)
        {
            // 获取选中行
            int strRowIdex = dgvMain.CurrentCell.RowIndex;
            // 创建参数对象 name, age, birthday, syid, ptoneno, workno, address
            OracleParameter[] param = new OracleParameter[] {
                new OracleParameter(":name", OracleDbType.Varchar2),
                new OracleParameter(":age", OracleDbType.Int32),
                new OracleParameter(":birthday", OracleDbType.Date),
                new OracleParameter(":ptoneno", OracleDbType.Varchar2),
                new OracleParameter(":workno", OracleDbType.Varchar2),
                new OracleParameter(":address", OracleDbType.Varchar2),
                new OracleParameter(":syid", OracleDbType.Varchar2)
            };
            param[0].Value = dgvMain.Rows[strRowIdex].Cells["name"].Value;
            param[1].Value = dgvMain.Rows[strRowIdex].Cells["age"].Value;
            param[2].Value = dgvMain.Rows[strRowIdex].Cells["birthday"].Value;
            param[3].Value = dgvMain.Rows[strRowIdex].Cells["ptoneno"].Value;
            param[4].Value = dgvMain.Rows[strRowIdex].Cells["workno"].Value;
            param[5].Value = dgvMain.Rows[strRowIdex].Cells["address"].Value;
            param[6].Value = dgvMain.Rows[strRowIdex].Cells["syid"].Value;

            // 更新数据库表
            int i = OracleHelper.ExecuteNonQuery(OracleHelper.oraConnStr, CommandType.Text, OracleSQL.UpdateWZJPersonData, param);
            // 消息提示
            MessageBox.Show("更新成功！", "提示");
        }

运行效果

  作者：Jeremy.Wu
  出处：https://www.cnblogs.com/jeremywucnblog/
  本文版权归作者和博客园共有，欢迎转载，但未经作者同意必须保留此段声明，且在文章页面明显位置给出原文连接，否则保留追究法律责任的权利。