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SqlHelper-创新互联

为罗城等地区用户提供了全套网页设计制作服务,及罗城网站建设行业解决方案。主营业务为做网站、成都做网站、罗城网站设计,以传统方式定制建设网站,并提供域名空间备案等一条龙服务,秉承以专业、用心的态度为用户提供真诚的服务。我们深信只要达到每一位用户的要求,就会得到认可,从而选择与我们长期合作。这样,我们也可以走得更远!>using System; using System.Collections.Generic; using System.Text; using System.Collections; using System.Data; using System.Data.SqlClient; using System.Configuration; namespace HelloWinForm.DBUtility { class SQLHelper { #region 通用方法 // 数据连接池 private SqlConnection con; /// /// 返回数据库连接字符串 /// /// public static String GetSqlConnection() { String conn= ConfigurationManager.AppSettings["connectionString"].ToString(); return conn; } #endregion #region 执行sql字符串 /// /// 执行不带参数的SQL语句 /// /// /// public static int ExecuteSql(String Sqlstr) { String ConnStr= GetSqlConnection(); using (SqlConnection conn = new SqlConnection(ConnStr)) { SqlCommand cmd= new SqlCommand(); cmd.Connection= conn; cmd.CommandText= Sqlstr; conn.Open(); cmd.ExecuteNonQuery(); conn.Close(); return 1; } } /// /// 执行带参数的SQL语句 /// /// SQL语句 /// 参数对象数组 /// public static int ExecuteSql(String Sqlstr, SqlParameter[] param) { String ConnStr= GetSqlConnection(); using (SqlConnection conn = new SqlConnection(ConnStr)) { SqlCommand cmd= new SqlCommand(); cmd.Connection= conn; cmd.CommandText= Sqlstr; cmd.Parameters.AddRange(param); conn.Open(); cmd.ExecuteNonQuery(); conn.Close(); return 1; } } /// /// 返回DataReader /// /// /// public static SqlDataReader ExecuteReader(String Sqlstr) { String ConnStr= GetSqlConnection(); SqlConnection conn= new SqlConnection(ConnStr);//返回DataReader时,是不可以用using()的 try { SqlCommand cmd= new SqlCommand(); cmd.Connection= conn; cmd.CommandText= Sqlstr; conn.Open(); return cmd.ExecuteReader(System.Data.CommandBehavior.CloseConnection);//关闭关联的Connection } catch //(Exception ex) { return null; } } /// /// 执行SQL语句并返回数据表 /// /// SQL语句 /// public static DataTable ExecuteDt(String Sqlstr) { String ConnStr= GetSqlConnection(); using (SqlConnection conn = new SqlConnection(ConnStr)) { SqlDataAdapter da= new SqlDataAdapter(Sqlstr, conn); DataTable dt= new DataTable(); conn.Open(); da.Fill(dt); conn.Close(); return dt; } } /// /// 执行SQL语句并返回DataSet /// /// SQL语句 /// public static DataSet ExecuteDs(String Sqlstr) { String ConnStr= GetSqlConnection(); using (SqlConnection conn = new SqlConnection(ConnStr)) { SqlDataAdapter da= new SqlDataAdapter(Sqlstr, conn); DataSet ds= new DataSet(); conn.Open(); da.Fill(ds); conn.Close(); return ds; } } #endregion #region 操作存储过程 /// /// 运行存储过程(已重载) /// /// 存储过程的名字 /// 存储过程的返回值 public int RunProc(string procName) { SqlCommand cmd= CreateCommand(procName, null); cmd.ExecuteNonQuery(); this.Close(); return (int)cmd.Parameters["ReturnValue"].Value; } /// /// 运行存储过程(已重载) /// /// 存储过程的名字 /// 存储过程的输入参数列表 /// 存储过程的返回值 public int RunProc(string procName, SqlParameter[] prams) { SqlCommand cmd= CreateCommand(procName, prams); cmd.ExecuteNonQuery(); this.Close(); return (int)cmd.Parameters[0].Value; } /// /// 运行存储过程(已重载) /// /// 存储过程的名字 /// 结果集 public void RunProc(string procName, out SqlDataReader dataReader) { SqlCommand cmd= CreateCommand(procName, null); dataReader= cmd.ExecuteReader(System.Data.CommandBehavior.CloseConnection); } /// /// 运行存储过程(已重载) /// /// 存储过程的名字 /// 存储过程的输入参数列表 /// 结果集 public void RunProc(string procName, SqlParameter[] prams, out SqlDataReader dataReader) { SqlCommand cmd= CreateCommand(procName, prams); dataReader= cmd.ExecuteReader(System.Data.CommandBehavior.CloseConnection); } /// /// 创建Command对象用于访问存储过程 /// /// 存储过程的名字 /// 存储过程的输入参数列表 /// Command对象 private SqlCommand CreateCommand(string procName, SqlParameter[] prams) { // 确定连接是打开的 Open(); //command = new SqlCommand( sprocName, new SqlConnection( ConfigManager.DALConnectionString ) ); SqlCommand cmd = new SqlCommand(procName, con); cmd.CommandType= CommandType.StoredProcedure; // 添加存储过程的输入参数列表 if (prams != null) { foreach (SqlParameter parameter in prams) cmd.Parameters.Add(parameter); } // 返回Command对象 return cmd; } /// /// 创建输入参数 /// /// 参数名 /// 参数类型 /// 参数大小 /// 参数值 /// 新参数对象 public SqlParameter MakeInParam(string ParamName, SqlDbType DbType, int Size, object Value) { return MakeParam(ParamName, DbType, Size, ParameterDirection.Input, Value); } /// /// 创建输出参数 /// /// 参数名 /// 参数类型 /// 参数大小 /// 新参数对象 public SqlParameter MakeOutParam(string ParamName, SqlDbType DbType, int Size) { return MakeParam(ParamName, DbType, Size, ParameterDirection.Output, null); } /// /// 创建存储过程参数 /// /// 参数名 /// 参数类型 /// 参数大小 /// 参数的方向(输入/输出) /// 参数值 /// 新参数对象 public SqlParameter MakeParam(string ParamName, SqlDbType DbType, Int32 Size, ParameterDirection Direction, object Value) { SqlParameter param; if (Size > 0) { param= new SqlParameter(ParamName, DbType, Size); } else { param= new SqlParameter(ParamName, DbType); } param.Direction= Direction; if (!(Direction == ParameterDirection.Output && Value == null)) { param.Value= Value; } return param; } #endregion #region 数据库连接和关闭 /// /// 打开连接池 /// private void Open() { // 打开连接池 if (con == null) { //这里不仅需要using System.Configuration;还要在引用目录里添加 con = new SqlConnection(GetSqlConnection()); con.Open(); } } /// /// 关闭连接池 /// public void Close() { if (con != null) con.Close(); } /// /// 释放连接池 /// public void Dispose() { // 确定连接已关闭 if (con != null) { con.Dispose(); con= null; } } #endregion } } 
using System;
using System.Collections.Generic;
using System.Text;
using System.Data.SqlClient;
using System.Data;
namespace MyBookShop.DAL
{
public static class DBHelper
    {

private static SqlConnection connection;
public static SqlConnection Connection
        {
get 
            {
string connectionString = "Data Source=localhost;Initial Catalog=myRole; uid=sa;Password=";
if (connection == null)
                {
                    connection= new SqlConnection(connectionString);
                    connection.Open();
                }
else if (connection.State == System.Data.ConnectionState.Closed)
                {
                    connection.Open();
                }
else if (connection.State == System.Data.ConnectionState.Broken)
                {
                    connection.Close();
                    connection.Open();
                }
return connection;
            }
        }

public static int ExecuteCommand(string safeSql)
        {
            SqlCommand cmd= new SqlCommand(safeSql, Connection);
int result = cmd.ExecuteNonQuery();
return result;
        }

public static int ExecuteCommand(string sql, params SqlParameter[] values)
        {
            SqlCommand cmd= new SqlCommand(sql, Connection);
            cmd.Parameters.AddRange(values);
return cmd.ExecuteNonQuery();
        }

public static int GetScalar(string safeSql)
        {
            SqlCommand cmd= new SqlCommand(safeSql, Connection);
int result = Convert.ToInt32(cmd.ExecuteScalar());
return result;
        }

public static int GetScalar(params SqlParameter[] values)
        {
            SqlCommand cmd= new SqlCommand();
            cmd.Connection= Connection;
            cmd.CommandText= "Pro_InsertOrder";
            cmd.CommandType= CommandType.StoredProcedure;
            cmd.Parameters.AddRange(values);
int result = Convert.ToInt32(cmd.ExecuteScalar());
return result;
        }

public static int GetScalar(string sql, params SqlParameter[] values)
        {
            SqlCommand cmd= new SqlCommand(sql, Connection);
            cmd.Parameters.AddRange(values);
int result = Convert.ToInt32(cmd.ExecuteScalar());
return result;
        }

public static SqlDataReader GetReader(string safeSql)
        {
            SqlCommand cmd= new SqlCommand(safeSql, Connection);
            SqlDataReader reader= cmd.ExecuteReader();
return reader;
        }

public static SqlDataReader GetReader(string sql, params SqlParameter[] values)
        {
            SqlCommand cmd= new SqlCommand(sql, Connection);
            cmd.Parameters.AddRange(values);
            SqlDataReader reader= cmd.ExecuteReader();
return reader;
        }

public static DataTable GetDataSet(string safeSql)
        {
            DataSet ds= new DataSet();
            SqlCommand cmd= new SqlCommand(safeSql, Connection);
            SqlDataAdapter da= new SqlDataAdapter(cmd);
            da.Fill(ds);
return ds.Tables[0];
        }

public static DataTable GetDataSet(string sql, params SqlParameter[] values)
        {
            DataSet ds= new DataSet();
            SqlCommand cmd= new SqlCommand(sql, Connection);
            cmd.Parameters.AddRange(values);
            SqlDataAdapter da= new SqlDataAdapter(cmd);
            da.Fill(ds);
return ds.Tables[0];
        }
    }
}

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