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  • SqlDBHelper常用方法

    /*=============================================================

     *.net连接数据库常用方法

     *Author : dongny,Li

     *E-mail : xing.dong.li@163.com

     *Edition: Beta 1.0

     *=============================================================*/

    using System;

    using System.Collections.Generic;

    using System.Text;

    using System.Configuration;

    using System.Data.SqlClient;

    using System.Data;

    namespace TreeViewHelper

    {

       public class SqlDBHelper

        {

           //在配置文件Web.Config中获取连接字符串

           public static string connectionStr =ConfigurationManager.ConnectionStrings["connectionStr"].ConnectionString;

           /// <summary>

           /// 执行增删改T-SQL语句,返回执行成功与否

           /// </summary>

           /// <param name="strSql">T-SQL语句或存储过程名称</param>

            /// <paramname="cmdType">T-SQL语句类别</param>

           /// <param name="param">参数列表</param>

           /// <returns>返回值为:true/false</returns>

           public static bool DoExecuteNonQuery(string strSql, CommandType cmdType,params SqlParameter[] param)

            {

               using (SqlConnection con = new SqlConnection(connectionStr))

               {

                    try

                    {

                        con.Open();

                        SqlCommand com = newSqlCommand(strSql, con);

                        com.CommandType = cmdType;

                        if (param.Length > 0)

                           com.Parameters.AddRange(param);

                        int flag =com.ExecuteNonQuery();

                        return flag > 0 ? true :false;

                    }

                    catch(Exception ex)

                    {

                        throw newException("SQL Connection Faile,Bring Error DoExecuteNonQuery :"+ex.Message);

                    }

                    finally

                    {

                        con.Close();

                    }

               }

           }

           /// <summary>

           /// 执行查询T-SQL语句,返回SqlDataReader对象

           /// </summary>

           /// <param name="strSql">T-SQL语句或存储过程</param>

           /// <param name="cmdType">T-SQL语句类型</param>

           /// <param name="param">参数列表</param>

           /// <returns>SqlDataReader对象</returns>

           public static SqlDataReader GetSqlDataReader(string strSql, CommandTypecmdType, params SqlParameter[] param)

           {

               SqlConnection con = new SqlConnection(connectionStr);

               SqlDataReader sdr = null;

               SqlCommand com = null;

               try

               {

                    con.Open();

                    com = new SqlCommand();

                    com.Connection = con;

                    com.CommandType = cmdType;

                    com.CommandText = strSql;

                    if (param.Length > 0)

                       com.Parameters.AddRange(param);

                    sdr =com.ExecuteReader(CommandBehavior.CloseConnection);

                    return sdr;

               }

               catch(Exception ex)

               {

                    con.Close();

                    throw new Exception("SQLConnection Faile ,Bring Error GetSqlDataReader: " + ex.Message);

               }

               finally

               {

                    com.Dispose();

               }

           }

           /// <summary>

           /// 执行查询T-SQL语句,返回DataSet

           /// </summary>

           /// <param name="strSql">T-SQL语句或存储过程</param>

           /// <param name="cmdType">T-SQL语句类型</param>

           /// <param name="param">参数列表</param>

           /// <returns>DataSet对象</returns>

           public static DataSet GetDataSet(string strSql, CommandType cmdType,params SqlParameter[] param)

           {

               using (SqlConnection con = new SqlConnection(connectionStr))

               {

                   SqlDataAdapter sda = null;

                    try

                    {

                        con.Open();

                        SqlCommand com = newSqlCommand(strSql, con);

                        com.CommandType = cmdType;

                       com.Parameters.AddRange(param);

                        sda = newSqlDataAdapter(com);

                        DataSet ds = new DataSet();

                        sda.Fill(ds);

                        return ds;

                    }

                    catch(Exception ex)

                    {

                        throw newException("SQL Connection Faile ,Bring error GetDataSet: " +ex.Message);

                    }

                    finally

                    {

                        sda.Dispose();

                        con.Close();

                    }

               }

           }

           /// <summary>

           /// 执行查询T-SQL语句,返回DataTable

           /// </summary>

           /// <param name="strSql">T-SQL语句或存储过程</param>

           /// <param name="cmdType">T-SQL语句类型</param>

           /// <param name="param">参数列表</param>

           /// <returns>DataTable对象</returns>

           public static DataTable GetDataTable(string strSql, CommandType cmdType,params SqlParameter[] param)

           {

               using (SqlConnection con = new SqlConnection(connectionStr))

               {

                    SqlDataAdapter sda = null;

                    try

                    {

                        con.Open();

                        SqlCommand com = newSqlCommand(strSql, con);

                        com.CommandType = cmdType;

                       com.Parameters.AddRange(param);

                        sda = newSqlDataAdapter(com);

                        DataTable dt = newDataTable();

                        sda.Fill(dt);

                       return dt;

                    }

                    catch(Exception ex)

                    {

                        throw newException("SQL Connection Faile ,Bring error GetDataTable: " +ex.Message);

                    }

                    finally

                    {

                        sda.Dispose();

                        con.Close();

                    }

               }

           }

           /// <summary>

           /// 执行查询T-SQL语句,返回单行记录

           /// </summary>

           /// <param name="strSql">T-SQL语句或存储过程</param>

           /// <param name="cmdType">T-SQL语句类型</param>

           /// <param name="param">参数列表</param>

           /// <returns>返回Object对象</returns>

           public static Object DoExecuteScalar(string strSql, CommandType cmdType,params SqlParameter[] param)

           {

               Object obj = null;

               using (SqlConnection con = new SqlConnection(connectionStr))

               {

                    SqlCommand com = newSqlCommand(strSql, con);

                    try

                    {

                        com.CommandType = cmdType;

                       com.Parameters.AddRange(param);

                        com.Connection.Open();

                        obj = com.ExecuteScalar();

                        return obj;

                    }

                    catch(Exception ex)

                    {

                        throw newException("SQL Connection Faile , Bring Error DoExecuteScalar: " +ex.Message);

                    }

                    finally

                    {

                        com.Dispose();

                        con.Close();

                    }

               }

           }

        }

    }

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  • 原文地址:https://www.cnblogs.com/beautiful-code/p/4895650.html
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