Oracle DbHelper

最新推荐文章于 2023-06-15 13:53:11 发布

转载最新推荐文章于 2023-06-15 13:53:11 发布 · 236 阅读

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CC 4.0 BY-SA版权

原文链接：http://www.cnblogs.com/wlzhang/p/4554840.html

文章标签：

#python #ui #数据库

本文详细介绍了在Wind8系统下配置Oracle客户端库时遇到的BadImageFormatException错误，以及如何通过选择x64模式或直接安装特定版本的ODTwithODAC组件来解决该问题。提供了具体的代码示例和步骤指导，帮助开发者顺利进行Oracle数据库连接。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

wind8 系统选择项目时生成目标平台选择为X86 报错
“System.Exception”类型的未经处理的异常在 WindowsFormsApplication1.exe 中发生

其他信息: 尝试加载 Oracle 客户端库时引发 BadImageFormatException。如果在安装 32 位 Oracle 客户端组件的情况下以 64 位模式运行，将出现此问题

选择x64不报错

或者直接安装 ODTwithODAC1120320_32bit vs连接oracle插件




using System;
using System.Data;
using System.Configuration;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.OracleClient;

/// <summary>
///OraDBHelper 的摘要说明
/// </summary>

public class OraDBHelper
{
    public static OracleCommand cmd = null;
    public static OracleConnection conn = null;
    public static string connstr = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
    public OraDBHelper()
    { }
    #region 建立数据库连接对象
    /// <summary>   
    /// 建立数据库连接   
    /// </summary>   
    /// <returns>返回一个数据库的连接OracleConnection对象</returns>   
    public static OracleConnection init()
    {
        try
        {
            conn = new OracleConnection(connstr);
            if (conn.State != ConnectionState.Open)
            {
                conn.Open();
            }
        }
        catch (Exception e)
        {
            throw new Exception(e.Message.ToString());
        }
        return conn;
    }
    #endregion

    #region 设置OracleCommand对象
    /// <summary>   
    /// 设置OracleCommand对象          
    /// </summary>   
    /// <param name="cmd">OracleCommand对象 </param>   
    /// <param name="cmdText">命令文本</param>   
    /// <param name="cmdType">命令类型</param>   
    /// <param name="cmdParms">参数集合</param>   
    private static void SetCommand(OracleCommand cmd, string cmdText, CommandType cmdType, OracleParameter[] cmdParms)
    {
        cmd.Connection = conn;
        cmd.CommandText = cmdText;
        cmd.CommandType = cmdType;
        if (cmdParms != null)
        {
            cmd.Parameters.AddRange(cmdParms);
        }
    }
    #endregion

    #region 执行相应的sql语句，返回相应的DataSet对象
    /// <summary>   
    /// 执行相应的sql语句，返回相应的DataSet对象   
    /// </summary>   
    /// <param name="sqlstr">sql语句</param>   
    /// <returns>返回相应的DataSet对象</returns>   
    public static DataSet GetDataSet(string sqlstr)
    {
        DataSet set = new DataSet();
        try
        {
            init();
            OracleDataAdapter adp = new OracleDataAdapter(sqlstr, conn);
            adp.Fill(set);
            conn.Close();
        }
        catch (Exception e)
        {
            throw new Exception(e.Message.ToString());
        }
        return set;
    }
    #endregion

    #region 执行相应的sql语句，返回相应的DataSet对象
    /// <summary>   
    /// 执行相应的sql语句，返回相应的DataSet对象   
    /// </summary>   
    /// <param name="sqlstr">sql语句</param>   
    /// <param name="tableName">表名</param>   
    /// <returns>返回相应的DataSet对象</returns>   
    public static DataSet GetDataSet(string sqlstr, string tableName)
    {
        DataSet set = new DataSet();
        try
        {
            init();
            OracleDataAdapter adp = new OracleDataAdapter(sqlstr, conn);
            adp.Fill(set, tableName);
            conn.Close();
        }
        catch (Exception e)
        {
            throw new Exception(e.Message.ToString());
        }
        return set;
    }
    #endregion

    #region 执行不带参数sql语句，返回所影响的行数
    /// <summary>   
    /// 执行不带参数sql语句，返回所影响的行数   
    /// </summary>   
    /// <param name="cmdstr">增，删，改sql语句</param>   
    /// <returns>返回所影响的行数</returns>   
    public static int ExecuteNonQuery(string cmdText)
    {
        int count;
        try
        {
            init();
            cmd = new OracleCommand(cmdText, conn);
            count = cmd.ExecuteNonQuery();
            conn.Close();
        }
        catch (Exception ex)
        {
            throw new Exception(ex.Message.ToString());
        }
        return count;
    }
    #endregion

    #region 执行带参数sql语句或存储过程，返回所影响的行数
    /// <summary>   
    ///  执行带参数sql语句或存储过程，返回所影响的行数   
    /// </summary>   
    /// <param name="cmdText">带参数的sql语句和存储过程名</param>   
    /// <param name="cmdType">命令类型</param>   
    /// <param name="cmdParms">参数集合</param>   
    /// <returns>返回所影响的行数</returns>   
    public static int ExecuteNonQuery(string cmdText, CommandType cmdType, OracleParameter[] cmdParms)
    {
        int count;
        try
        {
            init();
            cmd = new OracleCommand();
            SetCommand(cmd, cmdText, cmdType, cmdParms);
            count = cmd.ExecuteNonQuery();
            cmd.Parameters.Clear();
            conn.Close();
        }
        catch (Exception ex)
        {
            throw new Exception(ex.Message.ToString());
        }
        return count;
    }
    #endregion

    #region 执行不带参数sql语句，返回一个从数据源读取数据的OracleDataReader对象
    /// <summary>   
    /// 执行不带参数sql语句，返回一个从数据源读取数据的OracleDataReader对象   
    /// </summary>   
    /// <param name="cmdstr">相应的sql语句</param>   
    /// <returns>返回一个从数据源读取数据的OracleDataReader对象</returns>   
    public static OracleDataReader ExecuteReader(string cmdText)
    {
        OracleDataReader reader;
        try
        {
            init();
            cmd = new OracleCommand(cmdText, conn);
            reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);

        }
        catch (Exception ex)
        {
            throw new Exception(ex.Message.ToString());
        }
        return reader;
    }
    #endregion

    #region 执行带参数的sql语句或存储过程，返回一个从数据源读取数据的OracleDataReader对象
    /// <summary>   
    /// 执行带参数的sql语句或存储过程，返回一个从数据源读取数据的OracleDataReader对象   
    /// </summary>   
    /// <param name="cmdText">sql语句或存储过程名</param>   
    /// <param name="cmdType">命令类型</param>   
    /// <param name="cmdParms">参数集合</param>   
    /// <returns>返回一个从数据源读取数据的OracleDataReader对象</returns>   
    public static OracleDataReader ExecuteReader(string cmdText, CommandType cmdType, OracleParameter[] cmdParms)
    {
        OracleDataReader reader;
        try
        {
            init();
            cmd = new OracleCommand();
            SetCommand(cmd, cmdText, cmdType, cmdParms);
            reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
        }
        catch (Exception ex)
        {
            throw new Exception(ex.Message.ToString());
        }
        return reader;
    }
    #endregion

    #region 执行不带参数sql语句,返回结果集首行首列的值object
    /// <summary>   
    /// 执行不带参数sql语句,返回结果集首行首列的值object   
    /// </summary>   
    /// <param name="cmdstr">相应的sql语句</param>   
    /// <returns>返回结果集首行首列的值object</returns>   
    public static object ExecuteScalar(string cmdText)
    {
        object obj;
        try
        {
            init();
            cmd = new OracleCommand(cmdText, conn);
            obj = cmd.ExecuteScalar();
            conn.Close();
        }
        catch (Exception ex)
        {
            throw new Exception(ex.Message.ToString());
        }
        return obj;
    }
    #endregion

    #region 执行带参数sql语句或存储过程,返回结果集首行首列的值object
    /// <summary>   
    /// 执行带参数sql语句或存储过程,返回结果集首行首列的值object   
    /// </summary>   
    /// <param name="cmdText">sql语句或存储过程名</param>   
    /// <param name="cmdType">命令类型</param>   
    /// <param name="cmdParms">返回结果集首行首列的值object</param>   
    /// <returns></returns>   
    public static object ExecuteScalar(string cmdText, CommandType cmdType, OracleParameter[] cmdParms)
    {
        object obj;
        try
        {
            init();
            cmd = new OracleCommand();
            SetCommand(cmd, cmdText, cmdType, cmdParms);
            obj = cmd.ExecuteScalar();
            conn.Close();
        }
        catch (Exception ex)
        {
            throw new Exception(ex.Message.ToString());
        }
        return obj;
    }
    #endregion
}