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求个增删改查的通用基类。

2010-08-04 05:05:39 316 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

kiaoqq2010 墨衍会员 · AI 创作全网分发关注 + 加入社区

ENU坐标系实战：5分钟搞定无人机导航中的站心坐标转换本文针对无人机导航中GPS坐标与视觉感知不匹配的定位漂移问题，提供了基于ENU坐标系的实战解决方案。通过Python代码演示了如何快速、精准地实现地心地固坐标与站心坐标之间的转换，并详细解释了转换原理、精度对比及工程优化技巧，帮助开发者从根本上解决局部相对定位不准的难题。阅读详情

今天不要脸皮，跪求基类。
只为学习用。

...全文

MNE-python 进行源定位教程（一）配置环境根据MNE官网提供的教程进行复现，遇到各种问题的记录。配置环境 python3.8 + Anaconda + pycharm MNE-Python 是一个开源 Python 模块，用于处理、分析和可视化功能性神经影像数据（EEG、MEG、sEEG、ECoG 和 fNIRS）。根据官方建议，将MNE-python安装在anaconda的虚拟环境中。 1. 安装Anaconda 过程点击这里 2. 配置pycharm 2.1 导入MNE-python工具包在pycharm的菜单栏里打开VCS-Create 阅读详情

kiaoqq2010

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切换为时间正序

sundada2013 2012-07-27

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我也来求求求啊

cjfriends 2010-08-04

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[Quote=引用 1 楼 winner2050 的回复:]
用微软的sqlhelper
[/Quote]
这个很全很强大的

kiaoqq2010 2010-08-04

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汗所以问问题要详细。汗分浪费了。

脾气不坏 2010-08-04

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mark！
学习。。。

IHandler 2010-08-04

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using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Data;



/// <summary>

///BasePge 的摘要说明

/// </summary>

public class BasePage:System.Web.UI.Page

{

	public BasePage()

	{

		//

		//TODO: 在此处添加构造函数逻辑

		//

	}

    //

    //执行数据库操作的方法

    //

    protected virtual DataSet GetDataSet(String query)

    {

        //......

        return new DataSet();

    }

}



using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Data;



public partial class _Default : BasePage 

{

    protected void Page_Load(object sender, EventArgs e)

    {

        if (!IsPostBack)

        {

            //调用基类的方法

            DataSet ds = GetDataSet("Select * from Users");

        }

    }



}

IHandler 2010-08-04

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按楼主的意思，让SqlHelper继承System.Web.UI.Page
然后Web窗体类继承SqlHelper



using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;



/// <summary>

///BasePge 的摘要说明

/// </summary>

public class BasePage:System.Web.UI.Page

{

	public BasePage()

	{

		//

		//TODO: 在此处添加构造函数逻辑

		//

	}

    //

    //执行数据库操作的方法

    //

}



using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Data;



public partial class _Default : BasePage 

{

    protected void Page_Load(object sender, EventArgs e)

    {

        if (!IsPostBack)

        {



            

        }

    }



}

kiaoqq2010 2010-08-04

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- -!!

怎么就到7楼了。

凤凰涅檠 2010-08-04

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mark up

一克代码 2010-08-04

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[Quote=引用 3 楼 zhengfujie 的回复:]
微软的

C# code

public abstract class SQLHelper
{
/// <summary>
/// 连接字符串
/// </summary>

public static readonly string ConnectionString = "数据库连接字符串";

……
[/Quote]

很随意！！！！！！！

kiaoqq2010 2010-08-04

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sqlhelper...

可能各位误解我的意思了。

DataSet get()
{

}
int del(int id)
{

}

这样写大概就清楚意思了。- -!!

因为有很多不同的模块都经常用到这些形式的方法。我就想，写一个通用的父类，碰到相同的操作就可以直接调用父类的方法。

Peter200694013 2010-08-04

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DBAccess.cs



using System;

using System.Data;

using System.Data.SqlClient;

using System.Collections.Generic;

using System.Linq;

using System.Text;





namespace DBAccess

{

    public class SqlHelper:DBAccess

    {

        private List<SqlParameter> m_ListParameter = null;



        public DataTable ExecuteDataTable(string cmdText, params SqlParameter[] commandParameters)

        {

            DataSet ds = ExecuteDataSet(cmdText, commandParameters);

            if (null != ds)

            {

                if (0 != ds.Tables.Count)

                {

                    return ds.Tables[0];

                }

                else

                {

                    return null;

                }

            }

            else

            {

                return null;

            }

        }



        public DataTable ExecuteDataTable(string cmdText)

        {

            return ExecuteDataTable(cmdText, GetParameters());

        }



        public DataRow ExecuteDataRow(string cmdText, params SqlParameter[] commandParameters)

        {

            DataTable dt = ExecuteDataTable(cmdText, commandParameters);

            if (null != dt)

            {

                if (0 != dt.Rows.Count)

                {

                    return dt.Rows[0];



                }

                else

                {

                    return null;

                }

            }

            else

            {

                return null;

            }

        }



        public DataRow ExecuteDataRow(string cmdText)

        {

            return ExecuteDataRow(cmdText, GetParameters());

        }



        public int ExecuteNonQuery(string cmdText)

        {

            return ExecuteNonQuery(cmdText, GetParameters());

        }

        public int ExecuteNonQuery(SqlTransaction trans, string cmdText)

        {

            return ExecuteNonQuery(trans, cmdText, GetParameters());

        }

        public DataSet ExecuteDataSet(string cmdText)

        {

            return ExecuteDataSet(cmdText, GetParameters());

        }

        public SqlDataReader ExecuteReader(string cmdText)

        {

            return ExecuteReader(cmdText, GetParameters());

        }

        public object ExecuteScalar(string cmdText)

        {

            return ExecuteScalar(cmdText, GetParameters());

        }



        private SqlParameter GetParameter(string paraName, SqlDbType paraType, object value)

        {

            SqlParameter para = new SqlParameter(paraName, paraType);

            para.Value = value;



            return para;

        }



        private SqlParameter GetParameter(string paraName, SqlDbType paraType, object value, int size)

        {

            SqlParameter para = new SqlParameter(paraName, paraType);

            para.Value = value;

            para.Size = size;

            return para;

        }



        public void AddParameter(string paraName, SqlDbType paraType, object value)

        {

            if (null == m_ListParameter)

            {

                m_ListParameter = new List<SqlParameter>();

            }

            SqlParameter para = GetParameter(paraName, paraType, value);

            m_ListParameter.Add(para);

        }



        private SqlParameter[] GetParameters()

        {

            SqlParameter[] paras = null;

            if (null != m_ListParameter)

            {

                if (0 != m_ListParameter.Count)

                {

                    paras = m_ListParameter.ToArray();

                }

                m_ListParameter = null;

            }



            return paras;

        }

    }

}

SqlHelper.cs



using System;

using System.Data;

using System.Data.SqlClient;

using System.Collections.Generic;

using System.Linq;

using System.Text;





namespace DBAccess

{

    public class SqlHelper:DBAccess

    {

        private List<SqlParameter> m_ListParameter = null;



        public DataTable ExecuteDataTable(string cmdText, params SqlParameter[] commandParameters)

        {

            DataSet ds = ExecuteDataSet(cmdText, commandParameters);

            if (null != ds)

            {

                if (0 != ds.Tables.Count)

                {

                    return ds.Tables[0];

                }

                else

                {

                    return null;

                }

            }

            else

            {

                return null;

            }

        }



        public DataTable ExecuteDataTable(string cmdText)

        {

            return ExecuteDataTable(cmdText, GetParameters());

        }



        public DataRow ExecuteDataRow(string cmdText, params SqlParameter[] commandParameters)

        {

            DataTable dt = ExecuteDataTable(cmdText, commandParameters);

            if (null != dt)

            {

                if (0 != dt.Rows.Count)

                {

                    return dt.Rows[0];



                }

                else

                {

                    return null;

                }

            }

            else

            {

                return null;

            }

        }



        public DataRow ExecuteDataRow(string cmdText)

        {

            return ExecuteDataRow(cmdText, GetParameters());

        }



        public int ExecuteNonQuery(string cmdText)

        {

            return ExecuteNonQuery(cmdText, GetParameters());

        }

        public int ExecuteNonQuery(SqlTransaction trans, string cmdText)

        {

            return ExecuteNonQuery(trans, cmdText, GetParameters());

        }

        public DataSet ExecuteDataSet(string cmdText)

        {

            return ExecuteDataSet(cmdText, GetParameters());

        }

        public SqlDataReader ExecuteReader(string cmdText)

        {

            return ExecuteReader(cmdText, GetParameters());

        }

        public object ExecuteScalar(string cmdText)

        {

            return ExecuteScalar(cmdText, GetParameters());

        }



        private SqlParameter GetParameter(string paraName, SqlDbType paraType, object value)

        {

            SqlParameter para = new SqlParameter(paraName, paraType);

            para.Value = value;



            return para;

        }



        private SqlParameter GetParameter(string paraName, SqlDbType paraType, object value, int size)

        {

            SqlParameter para = new SqlParameter(paraName, paraType);

            para.Value = value;

            para.Size = size;

            return para;

        }



        public void AddParameter(string paraName, SqlDbType paraType, object value)

        {

            if (null == m_ListParameter)

            {

                m_ListParameter = new List<SqlParameter>();

            }

            SqlParameter para = GetParameter(paraName, paraType, value);

            m_ListParameter.Add(para);

        }



        private SqlParameter[] GetParameters()

        {

            SqlParameter[] paras = null;

            if (null != m_ListParameter)

            {

                if (0 != m_ListParameter.Count)

                {

                    paras = m_ListParameter.ToArray();

                }

                m_ListParameter = null;

            }



            return paras;

        }

    }

}

myhope88 2010-08-04

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下载个helper类就行啦

zhulong1111 2010-08-04

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mark 官方的比较好用

「已注销」 2010-08-04

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微软的



public abstract class SQLHelper

    {

        /// <summary>

        /// 连接字符串

        /// </summary>



       public static readonly string ConnectionString = "数据库连接字符串";



       

       

            

        private static Hashtable parmCache = Hashtable.Synchronized(new Hashtable());



        /// <summary>

        /// 数据库增,删,改方法

        /// </summary>

        /// <param name="connectionString">连接字符串</param>

        /// <param name="cmdType">Command类型</param>

        /// <param name="cmdText">执行文本</param>

        /// <param name="commandParameters">参数</param>

        /// <returns></returns>

        public static int ExecuteNonQuery(string connectionString, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)

        {



            SqlCommand cmd = new SqlCommand();

            

            using (SqlConnection conn = new SqlConnection(connectionString))

            {

                PrepareCommand(cmd, conn, null, cmdType, cmdText, commandParameters);

                int val = cmd.ExecuteNonQuery();

                cmd.Parameters.Clear();

                return val;

            }

        }



        /// <summary>a

        /// 数据库增,删,改方法



        /// </summary>

        /// <param name="connection">连接对象</param>

        /// <param name="cmdType">Command类型</param>

        /// <param name="cmdText">执行文本</param>

        /// <param name="commandParameters">参数</param>

        /// <returns></returns>

        public static int ExecuteNonQuery(SqlConnection connection, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)

        {



            SqlCommand cmd = new SqlCommand();



            PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters);

            int val = cmd.ExecuteNonQuery();

            cmd.Parameters.Clear();

            return val;

        }



        /// <summary>

        /// 数据库增,删,改方法



        /// </summary>

        /// <param name="trans">事务</param>

        /// <param name="cmdType">Command类型</param>

        /// <param name="cmdText">执行文本</param>

        /// <param name="commandParameters">参数</param>

        /// <returns></returns>

        public static int ExecuteNonQuery(SqlTransaction trans, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)

        {

            SqlCommand cmd = new SqlCommand();

            PrepareCommand(cmd, trans.Connection, trans, cmdType, cmdText, commandParameters);

            int val = cmd.ExecuteNonQuery();

            cmd.Parameters.Clear();

            return val;

        }



        /// <summary>

        /// 读取数据

        /// </summary>

        /// <param name="connectionString">连接字符串</param>

        /// <param name="cmdType">Command类型</param>

        /// <param name="cmdText">执行文本</param>

        /// <param name="commandParameters">参数</param>

        /// <returns>SqlDataReader</returns>

        public static SqlDataReader ExecuteReader(string connectionString, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)

        {

            SqlCommand cmd = new SqlCommand();

            SqlConnection conn = new SqlConnection(connectionString);





            try

            {

                PrepareCommand(cmd, conn, null, cmdType, cmdText, commandParameters);

                SqlDataReader rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection);

                cmd.Parameters.Clear();

                return rdr;

            }

            catch(SqlException ex)

            {

                string s = ex.Message;

                conn.Close();

                throw;

            }

        }



        /// <summary>

        /// 读取数据

        /// </summary>

        /// <param name="safeSql">执行文本</param>

        /// <param name="cmdType">command类型</param>

        /// <param name="connectionString">连接字符串</param>

        /// <returns>DataTable</returns>

        public static DataTable GetDataSet(string safeSql,CommandType cmdType, string connectionString)

        {

            DataSet ds = new DataSet();

            using (SqlConnection conn = new SqlConnection(connectionString))

            {

                SqlCommand cmd = new SqlCommand(safeSql, conn);

                SqlDataAdapter da = new SqlDataAdapter(cmd);

                da.Fill(ds);

                return ds.Tables[0];

            }



        }



        /// <summary>

        /// 读取数据

        /// </summary>

        /// <param name="connectionString">连接字符串</param>

        /// <param name="cmdType">command类型</param>

        /// <param name="sql">执行文本</param>

        /// <param name="values">参数</param>

        /// <returns>DataTable</returns>

        public static DataTable GetDataSet(string connectionString,CommandType cmdType, string sql, params SqlParameter[] values)

        {

            DataSet ds = new DataSet();

            using (SqlConnection conn = new SqlConnection(connectionString))

            {

                SqlCommand cmd = new SqlCommand(sql, conn);

                cmd.CommandType = cmdType;

                cmd.Parameters.AddRange(values);

                SqlDataAdapter da = new SqlDataAdapter(cmd);

                da.Fill(ds);

                return ds.Tables[0];

            }



        }



        /// <summary>

        /// 得到单个返回值结果



        /// </summary>

        /// <param name="connectionString">连接字符串</param>

        /// <param name="cmdType">command类型</param>

        /// <param name="cmdText">执行文本</param>

        /// <param name="commandParameters">参数</param>

        /// <returns>object对象</returns>

        public static object ExecuteScalar(string connectionString, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)

        {

            SqlCommand cmd = new SqlCommand();



            using (SqlConnection connection = new SqlConnection(connectionString))

            {

                PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters);

                object val = cmd.ExecuteScalar();

                cmd.Parameters.Clear();

                return val;

            }

        }



        /// <summary>

        /// 得到单个返回值结果



        /// </summary>

        /// <param name="connection">连接对象</param>

        /// <param name="cmdType">command类型</param>

        /// <param name="cmdText">执行文本</param>

        /// <param name="commandParameters">参数</param>

        /// <returns>object对象</returns>

        public static object ExecuteScalar(SqlConnection connection, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)

        {



            SqlCommand cmd = new SqlCommand();



            PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters);

            object val = cmd.ExecuteScalar();

            cmd.Parameters.Clear();

            return val;

        }



        public static void CacheParameters(string cacheKey, params SqlParameter[] commandParameters)

        {

            parmCache[cacheKey] = commandParameters;

        }



        public static SqlParameter[] GetCachedParameters(string cacheKey)

        {

            SqlParameter[] cachedParms = (SqlParameter[])parmCache[cacheKey];



            if (cachedParms == null)

                return null;



            SqlParameter[] clonedParms = new SqlParameter[cachedParms.Length];



            for (int i = 0, j = cachedParms.Length; i < j; i++)

                clonedParms[i] = (SqlParameter)((ICloneable)cachedParms[i]).Clone();



            return clonedParms;

        }



        /// <summary>

        /// 处理ADO.NET数据操作对象

        /// </summary>

        /// <param name="cmd">执行对象</param>

        /// <param name="conn">连接对象</param>

        /// <param name="trans">事务对象</param>

        /// <param name="cmdType">command类型</param>

        /// <param name="cmdText">执行文本</param>

        /// <param name="cmdParms">参数</param>

        private static void PrepareCommand(SqlCommand cmd, SqlConnection conn, SqlTransaction trans, CommandType cmdType, string cmdText, SqlParameter[] 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 (SqlParameter parm in cmdParms)

                    cmd.Parameters.Add(parm);

            }

        }

Peter200694013 2010-08-04

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数据库操作类？

sqlhelper..

winner2050 2010-08-04

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用微软的sqlhelper

✦双11狂欢大促✦

求个增删改查的通用基类。

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