C# SQLServer 数据库连接类

using System;
using System.Data;
using System.Configuration;
using System.Web;
//using System.Web.Security;
//using System.Web.UI;
//using System.Web.UI.WebControls;
//using System.Web.UI.WebControls.WebParts;
//using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
using System.Text;
using System.Collections;
namespace domain.SQLDB
{

    public class DbAccess
    {
        SqlConnection conn = null;
        SqlCommand cmd = null;
        public DbAccess()
        {
            //
            // TODO: 在此处添加构造函数逻辑
            //
            conn = new SqlConnection();
            conn.ConnectionString =  Convert.ToString(System.Configuration.ConfigurationSettings.AppSettings["datasource"]);
            //conn.ConnectionString = "initial catalog=idyan_new;data source=.;user id=bt;password=btbtbtbt;Connect Timeout=5000";
            cmd = new SqlCommand();
            cmd.Connection = conn;
            cmd.CommandTimeout = 0;
    
        }
        public DbAccess(string constr)
        {
         
            //
            // TODO: 在此处添加构造函数逻辑
            //
            conn = new SqlConnection();
            conn.ConnectionString = constr;// "initial catalog=idyan_new;data source=.;user id=bt;password=btbtbtbt";
            cmd = new SqlCommand();
            cmd.Connection = conn;
            cmd.CommandTimeout = 0;
         
        }
        /// <summary>
        /// 获取数据根据sql语句
        /// </summary>
        /// <param name="sql"></param>
        /// <returns></returns>
        public DataTable GetTable(string sql)
        {
            DataSet ds = new DataSet();
            try
            {
                cmd.CommandText = sql;
                cmd.CommandType = CommandType.Text;
                SqlDataAdapter da = new SqlDataAdapter();
                da.SelectCommand = cmd;
                da.Fill(ds);
            }
            catch (Exception ex)
            {

                this.ShowError(ex.Message);
                return null;

            }
            return ds.Tables[0] ?? new DataTable();
        }
        /// <summary>
        /// 获取数据根据sql语句
        /// </summary>
        /// <param name="sql"></param>
        /// <returns></returns>
        public DataSet GetDataSet(string sql)
        {
            DataSet ds = new DataSet();

            try
            {
                cmd.CommandText = sql;
                cmd.CommandType = CommandType.Text;
                SqlDataAdapter da = new SqlDataAdapter();
                da.SelectCommand = cmd;
                da.Fill(ds);
            }
            catch (Exception ex)
            {

                this.ShowError(ex.Message);
                return null;

            }
            return ds;
        }
        /// <summary>
        /// 获取数据根据sql语句
        /// </summary>
        /// <param name="sql"></param>
        /// <returns></returns>
        public DataSet GetDataSet(string sql,SqlParameter[] pas)
        {
            DataSet ds = new DataSet();

            try
            {
                cmd.Parameters.Clear();
                cmd.CommandText = sql;
                foreach (SqlParameter pa in pas)
                {
                    cmd.Parameters.Add(pa);
                }
                cmd.CommandType = CommandType.Text;
                SqlDataAdapter da = new SqlDataAdapter();
                da.SelectCommand = cmd;
                da.Fill(ds);
            }
            catch (Exception ex)
            {

                this.ShowError(ex.Message);
                return null;

            }
            return ds;
        }
        /// <summary>
        /// 获取数据根据sql语句 带参数 的
        /// </summary>
        /// <param name="sql"></param>
        /// <param name="pas"></param>
        /// <returns></returns>
        public DataTable GetTable(string sql, params SqlParameter[] pas)
        {
            DataSet ds = new DataSet();
            try
            {
                cmd.CommandText = sql;
                cmd.CommandType = CommandType.Text;
                SqlDataAdapter da = new SqlDataAdapter();
                da.SelectCommand = cmd;
                cmd.Parameters.Clear();

                foreach (SqlParameter temppa in pas)
                {
                    cmd.Parameters.Add(temppa);
                }

                da.Fill(ds);
            }
            catch (Exception ex)
            {

                this.ShowError(ex.Message);
                return null;
            }
            return ds.Tables[0] ?? new DataTable();
        }
        /// <summary>
        /// 获取数据根据sql语句 带参数 的
        /// </summary>
        /// <param name="sql"></param>
        /// <param name="pas"></param>
        /// <returns></returns>
        public DataTable GetProcTable(string procname, params SqlParameter[] pas)
        {
            DataSet ds = new DataSet();
            try
            {
                cmd.CommandType = CommandType.StoredProcedure;
                cmd.CommandText = procname;
                //cmd.CommandText = sql;
                SqlDataAdapter da = new SqlDataAdapter();
                da.SelectCommand = cmd;
                cmd.Parameters.Clear();

                foreach (SqlParameter temppa in pas)
                {
                    cmd.Parameters.Add(temppa);
                }
              

                da.Fill(ds);
            }
            catch (Exception ex)
            {

                this.ShowError(ex.Message);
                return null;
            }
            return ds.Tables[0] ?? new DataTable();
        }
        /// <summary>
        /// 获取数据根据sql语句 带参数 的
        /// </summary>
        /// <param name="sql"></param>
        /// <param name="pas"></param>
        /// <returns></returns>
        public DataTable GetProcCursorTable(string procname, params SqlParameter[] pas)
        {
            DataSet ds = new DataSet();
            try
            {
                cmd.CommandType = CommandType.StoredProcedure;
                cmd.CommandText = procname;
                //cmd.CommandText = sql;
                SqlDataAdapter da = new SqlDataAdapter();
                da.SelectCommand = cmd;
                cmd.Parameters.Clear();

                foreach (SqlParameter temppa in pas)
                {
                    cmd.Parameters.Add(temppa);
                }

 

                da.Fill(ds);
            }
            catch (Exception ex)
            {

                this.ShowError(ex.Message);
                return null;
            }
            return ds.Tables[1] ?? new DataTable();
        }
        /// <summary>
        /// 获取数据根据sql语句 带参数 的
        /// </summary>
        /// <param name="sql"></param>
        /// <param name="pas"></param>
        /// <returns></returns>
        public int  GetProcState(string procname, params SqlParameter[] pas)
        {
            int state = 0;
            try
            {
                OpenConn();
                cmd.CommandType = CommandType.StoredProcedure;
                cmd.CommandText = procname;
                cmd.Parameters.Clear();
                foreach (SqlParameter temppa in pas)
                {
                    cmd.Parameters.Add(temppa);
                }
                cmd.ExecuteNonQuery();
                CloseConn();
                state = Convert.ToInt32(pas[pas.Length - 1].Value);
             
            }
            catch
            {
                return 0;
            }
            return state;
        }
        /// <summary>
        /// 获取数据根据sql语句 带参数 的
        /// </summary>
        /// <param name="sql"></param>
        /// <param name="pas"></param>
        /// <returns></returns>
        public int GetProcStateNo(string procname, params SqlParameter[] pas)
        {
            int state = 0;
            try
            {
                OpenConn();
                cmd.CommandType = CommandType.StoredProcedure;
                cmd.CommandText = procname;
                cmd.Parameters.Clear();
                foreach (SqlParameter temppa in pas)
                {
                    cmd.Parameters.Add(temppa);
                }
                cmd.ExecuteNonQuery();
                CloseConn();
                state = 1;
               // state = Convert.ToInt32(pas[pas.Length - 1].Value);

            }
            catch(Exception ex)
            {

                return 0;
            }
            return state;
        }
        /// <summary>
        /// 根据sql语句返回跟新状态
        /// </summary>
        /// <param name="sql"></param>
        /// <returns></returns>
        public bool GetState(string sql)
        {
            bool succ = false;
            try
            {
                cmd.CommandType = CommandType.Text;
                cmd.CommandText = sql;
                OpenConn();
                succ = cmd.ExecuteNonQuery() > 0 ? (true) : (false);
                CloseConn();
            }
            catch (Exception ex)
            {

                this.ShowError(ex.Message);
                return false;
            }
            return succ;

        }
        /// <summary>
        /// 根据sql语句返回跟新状态带参数的
        /// </summary>
        /// <param name="sql">sql语句</param>
        /// <param name="pas">参数的集合</param>
        /// <returns></returns>
        public bool GetState(string sql, params SqlParameter[] pas)
        {
            bool succ = false;
            try
            {
                cmd.CommandType = CommandType.Text;
                cmd.CommandText = sql;
                cmd.Parameters.Clear();

                foreach (SqlParameter temppa in pas)
                {
                    cmd.Parameters.Add(temppa);
                }
                OpenConn();
                succ = cmd.ExecuteNonQuery() > 0 ? (true) : (false);
                CloseConn();
            }
            catch (Exception ex)
            {

               // this.ShowError(ex.Message);
                //using (System.IO.StreamWriter sw = new System.IO.StreamWriter("D:\\error2008.txt"))
                //{
                //    sw.Write(ex.Message);
                //    sw.Flush();
                //}
                return false;
            }
            return succ;

        }
        /// <summary>
        /// 根据sql语句返回第一个单元格的数据
        /// </summary>
        /// <param name="sql"></param>
        /// <returns></returns>
        public string GetOne(string sql)
        {
            string res = "";
            try
            {
                cmd.CommandType = CommandType.Text;
                cmd.CommandText = sql;
                OpenConn();
                res = cmd.ExecuteScalar() == null ? ("") : (Convert.ToString(cmd.ExecuteScalar()));
                CloseConn();
            }
            catch (Exception ex)
            {

                this.ShowError(ex.Message);
                return null;
            }
            return res;
        }
        /// <summary>
        ///  根据sql语句返回第一个单元格的数据带参数的
        /// </summary>
        /// <param name="sql"></param>
        /// <param name="pas"></param>
        /// <returns></returns>
        public string GetOne(string sql, params SqlParameter[] pas)
        {
            string res = "";
            try
            {
                cmd.CommandType = CommandType.Text;
                cmd.CommandText = sql;
                cmd.Parameters.Clear();

                foreach (SqlParameter temppa in pas)
                {
                    cmd.Parameters.Add(temppa);
                }
                OpenConn();
                res = cmd.ExecuteScalar() == null ? ("") : (Convert.ToString(cmd.ExecuteScalar()));
                CloseConn();
            }
            catch (Exception ex)
            {

                this.ShowError(ex.Message);
                return null;
            }
            return res;
        }
        /// <summary>
        /// 返回数据的DataReader
        /// </summary>
        /// <param name="sql"></param>
        /// <returns></returns>
        public SqlDataReader GetDataReader(string sql)
        {
            SqlDataReader dr = null;
            try
            {
                cmd.CommandType = CommandType.Text;
                conn.Open();
                cmd.CommandText = sql;
                dr = cmd.ExecuteReader();
            }
            catch (Exception ex)
            {

                this.ShowError(ex.Message);
                return null;
            }
            return dr;
        }
        /// <summary>
        /// 返回数据的DataReader带参数的
        /// </summary>
        /// <param name="sql"></param>
        /// <param name="pas"></param>
        /// <returns></returns>
        public SqlDataReader GetDataReader(string sql, params SqlParameter[] pas)
        {
            SqlDataReader dr = null;
            try
            {
                cmd.CommandType = CommandType.Text;
                conn.Open();
                cmd.Parameters.Clear();

                foreach (SqlParameter temppa in pas)
                {
                    cmd.Parameters.Add(temppa);
                }

                cmd.CommandText = sql;
                dr = cmd.ExecuteReader();
            }
            catch (Exception ex)
            {

                this.ShowError(ex.Message);
                return null;
            }
            return dr;
        }
        /// <summary>
        /// 事务处理函数
        /// </summary>
        /// <param name="al"></param>
        /// <returns></returns>
        public bool GetTranState(ArrayList al)
        {
            cmd.CommandType = CommandType.Text;
            OpenConn();
            SqlTransaction tran = conn.BeginTransaction();
            cmd.Transaction = tran;
            try
            {
                for (int i = 0; i < al.Count; i++)
                {
                    cmd.CommandText = Convert.ToString(al[i]);
                    cmd.ExecuteNonQuery();
                }
           
                tran.Commit();  
                CloseConn();
            }
            catch (Exception ex)
            {

                tran.Rollback();
                return false;
            }
            return true;

        }
        /// <summary>
        /// 事务处理函数
        /// </summary>
        /// <param name="al"></param>
        /// <returns></returns>
        public bool GetTranStateParameter(ArrayList al)
        {
            cmd.CommandType = CommandType.Text;
            OpenConn();
            SqlTransaction tran = conn.BeginTransaction();
            cmd.Transaction = tran;
            try
            {
                for (int i = 0; i < al.Count; i++)
                {
                    SqlTranModel stm = (SqlTranModel)al[i];
                    cmd.CommandText = Convert.ToString(stm.Sql);
                    SqlParameter[] pas = stm.Pas;
                    cmd.Parameters.Clear();
                    foreach (SqlParameter temp in pas)
                    {
                        cmd.Parameters.Add(temp);
                    }
                    cmd.ExecuteNonQuery();
                }

                tran.Commit();
                CloseConn();
            }
            catch (Exception ex)
            {

                tran.Rollback();
                return false;
            }
            return true;

        }
        /// <summary>
        /// 分页函数
        /// </summary>
        /// <param name="pagesize"></param>
        /// <param name="columns"></param>
        /// <param name="tablename"></param>
        /// <param name="pid"></param>
        /// <param name="order"></param>
        /// <param name="current"></param>
        /// <returns></returns>
        public DataTable GetPageData(int current,int pagesize,string columns,string tablename,string pid,string where,string order)
        {
            current = current-1>=0?(current-1):(0);
            string sql = string.Format("select top {0} {1} from {2} where 1=1 and {3} not in(select top {4}{3} from {2} where 1=1{5}  order by {6}){5} order by {6}", pagesize, columns, tablename, pid, current * pagesize,where, order);
            return GetTable(sql);
        }
        /// <summary>
        /// 分页存储过程的调用
        /// </summary>
        /// <param name="current"></param>
        /// <param name="pagesize"></param>
        /// <param name="columns"></param>
        /// <param name="tablename"></param>
        /// <param name="pid"></param>
        /// <param name="where"></param>
        /// <param name="order"></param>
        /// <returns></returns>
        public DataTable GetProcPageData(int current, int pagesize, string columns, string tablename, string pid, string where, string order,string ordertype)
        {
            SqlParameter[] pas = { new SqlParameter("@PageIndex", current), new SqlParameter("@PageSize", pagesize), new SqlParameter("@Columns", columns), new SqlParameter("@Tablename", tablename), new SqlParameter("@Where", where), new SqlParameter("@Order", order), new SqlParameter("@OrderType", ordertype), new SqlParameter("@Pid", pid)};
            return GetProcTable("Pages", pas);
            //current = current - 1 >= 0 ? (current - 1) : (0);
            //string sql = string.Format("select top {0} {1} from {2} where 1=1 and {3} not in(select top {4}{3} from {2} where 1=1{5}  order by {6}){5} order by {6}", pagesize, columns, tablename, pid, current * pagesize, where, order);
            //return GetTable(sql);
        }
        /// <summary>
        /// 分页存储过程的调用
        /// </summary>
        /// <param name="current"></param>
        /// <param name="pagesize"></param>
        /// <param name="columns"></param>
        /// <param name="tablename"></param>
        /// <param name="pid"></param>
        /// <param name="where"></param>
        /// <param name="order"></param>
        /// <returns></returns>
        public DataTable GetProcData(int current, int pagesize, string columns, string tablename, string pid, string where, string order,string resultCount, string distinct)
        {
            SqlParameter[] pas = { new SqlParameter("@TableNames", SqlDbType.NVarChar, 200), new SqlParameter("@PrimaryKey", SqlDbType.NVarChar, 100), new SqlParameter("@Order", SqlDbType.NVarChar, 200), new SqlParameter("@CurrentPage", SqlDbType.Int), new SqlParameter("@PageSize", SqlDbType.Int), new SqlParameter("@Fields", SqlDbType.NVarChar, 800), new SqlParameter("@Filter", SqlDbType.NVarChar, 1000), new SqlParameter("@ResultCount", SqlDbType.NVarChar, 12), new SqlParameter("@distinct", SqlDbType.NVarChar, 12) };
            pas[0].Value = tablename;
            pas[1].Value = pid;
            pas[2].Value = order;
            pas[3].Value = current;
            pas[4].Value = pagesize;
            pas[5].Value = columns;
            pas[6].Value = where;
            pas[7].Value = resultCount;
            pas[8].Value = distinct;
            return this.GetProcTable("Pages", pas);
            //SqlParameter[] parameters = {
            //                                new SqlParameter("@TableNames",SqlDbType.VarChar,8000),
            //                                new SqlParameter("@PrimaryKey", SqlDbType.VarChar,8000),
            //                                new SqlParameter("@Order", SqlDbType.VarChar,8000),
            //                                new SqlParameter("@CurrentPage",SqlDbType.Int),
            //                                new SqlParameter("@PageSize", SqlDbType.Int),
            //                                new SqlParameter("@Fields",SqlDbType.VarChar,8000),
            //                                new SqlParameter("@Filter", SqlDbType.VarChar,8000),
            //                                new SqlParameter("@Group", SqlDbType.VarChar,8000)
            //                            };
            //parameters[0].Value = tablename;
            //parameters[1].Value = pid;
            //parameters[2].Value = order;
            //parameters[3].Value = current;
            //parameters[4].Value = pagesize;
            //parameters[5].Value = columns;
            //parameters[6].Value = where;
            //parameters[7].Value = "";
            //DataSet ds = DbHelperSQL.RunProcedure("Pages", parameters, "data");

            //return ds.Tables["data"];//
            //return GetProcTable("Pages", pas);
            //current = current - 1 >= 0 ? (current - 1) : (0);
            //string sql = string.Format("select top {0} {1} from {2} where 1=1 and {3} not in(select top {4}{3} from {2} where 1=1{5}  order by {6}){5} order by {6}", pagesize, columns, tablename, pid, current * pagesize, where, order);
            //return GetTable(sql);
        }
        /// <summary>
        /// 分页存储过程的调用
        /// </summary>
        /// <param name="current"></param>
        /// <param name="pagesize"></param>
        /// <param name="columns"></param>
        /// <param name="tablename"></param>
        /// <param name="pid"></param>
        /// <param name="where"></param>
        /// <param name="order"></param>
        /// <returns></returns>
        public DataTable GetProcAdminData(int current, int pagesize, string columns, string tablename, string pid, string where, string order,string resultCount, string distinct)
        {
            SqlParameter[] pas = { new SqlParameter("@TableNames", SqlDbType.NVarChar, 200), new SqlParameter("@PrimaryKey", SqlDbType.NVarChar, 100), new SqlParameter("@Order", SqlDbType.NVarChar, 200), new SqlParameter("@CurrentPage", SqlDbType.Int), new SqlParameter("@PageSize", SqlDbType.Int), new SqlParameter("@Fields", SqlDbType.NVarChar, 800), new SqlParameter("@Filter", SqlDbType.NVarChar, 200), new SqlParameter("@ResultCount", SqlDbType.NVarChar, 24), new SqlParameter("@Distinct", SqlDbType.NVarChar, 12) };
            pas[0].Value = tablename;
            pas[1].Value = pid;
            pas[2].Value = order;
            pas[3].Value = current;
            pas[4].Value = pagesize;
            pas[5].Value = columns;
            pas[6].Value = where;
            pas[7].Value = resultCount;
            pas[8].Value = distinct;
            return this.GetProcTable("Pages", pas);
    
        }
        /// <summary>
        /// 打开连接
        /// </summary>
        public void OpenConn()
        {
            if (conn.State != ConnectionState.Open)
            {
                try
                {
                    conn.Open();
                }
                catch (Exception ex)
                {

                    this.ShowError(ex.Message);
                    return;
                }
            }
        }
        /// <summary>
        /// 关闭连接
        /// </summary>
        public void CloseConn()
        {
            if (conn.State != ConnectionState.Closed)
            {
                try
                {
                    conn.Close();
                
                }
                catch (Exception ex)
                {

                    this.ShowError(ex.Message);
                    return;
                }
            }
        }
        public void DisposeConn()
        {
            try
            {
                if (conn.State != ConnectionState.Closed)
                {
                    try
                    {
                        conn.Close();

                    }
                    catch (Exception ex)
                    {

                        this.ShowError(ex.Message);
                        return;
                    }
                }
            }
            catch
            {
 
            }
        }
    
        /// <summary>
        /// 弹出错误的信息
        /// </summary>
        /// <param name="err"></param>
        public void ShowError(string err)
        {
          //  System.Web..Current.Response.Write(Script(err, ""));
        }
        /// <summary>
        /// 显示信息
        /// </summary>
        /// <param name="err"></param>
        public void ShowMessage(string mes, string loc)
        {
           // System.Web.HttpContext.Current.Response.Write(Script(mes, loc));
        }
        /// <summary>
        /// javascript脚本
        /// </summary>
        /// <param name="mess"></param>
        /// <param name="loc"></param>
        /// <returns></returns>
        public string Script(string mess, string loc)
        {
            StringBuilder sb = new StringBuilder();
            sb.Append("<script language='javascript'>");
            sb.Append("alert('");
            sb.Append(mess);
            sb.Append("');");
            sb.Append(loc);
            sb.Append("</script>");
            return sb.ToString();

        }
        /// <summary>
        /// 弹出错误的信息
        /// </summary>
        /// <param name="err"></param>
        public static void ShowErrorstatic(string err)
        {
           // System.Web.HttpContext.Current.Response.Write(DbAccess.Scriptstatic(err, ""));
        }
        /// <summary>
        /// 显示信息
        /// </summary>
        /// <param name="err"></param>
        public static void ShowMessagestatic(string mes, string loc)
        {
            //System.Web.HttpContext.Current.Response.Write(DbAccess.Scriptstatic(mes, loc));
        }
         //<summary>
         //javascript脚本
         //</summary>
         //<param name="mess"></param>
         //<param name="loc"></param>
         //<returns></returns>
        public static string Scriptstatic(string mess, string loc)
        {
            StringBuilder sb = new StringBuilder();
            sb.Append("<script language='javascript'>");
            sb.Append("alert('");
            sb.Append(mess);
            sb.Append("');");
            sb.Append(loc);
            sb.Append("</script>");
            return sb.ToString();

        }
        public SqlParameter[] MakeParameters(params string[] pas)
        {
            SqlParameter[] tempPas = new SqlParameter[pas.Length / 2];
            if (pas.Length % 2 == 0)
            {
                for (int i = 0; i < pas.Length / 2; i++)
                {
                    tempPas[i] = new SqlParameter(pas[i * 2], pas[i * 2 + 1]);
                }
            }
            return tempPas;

        }
 
    }
    public class SqlTranModel
    {
        private string _sql;
        public string Sql
        {
            set { this._sql = value; }
            get { return this._sql; }
        }
        private SqlParameter[] _pas;
        public SqlParameter[] Pas
        {
            set { this._pas = value; }
            get { return this._pas; }
        }
    }
}