DataBase类

using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Data.SqlClient
using System.Configuration;
using System.Collections;


namespace Utility
{
    //数据库连接类
    public class DataBase
    {
        protected SqlConnection Connection;
        protected string ConnectionString;
        //构造函数
        public DataBase()
        {
            ConnectionString = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
        }

        //打开数据库连接
        protected void Open()
        {
            if(Connection == null)
            {
                Connection = new SqlConnection(ConnectionString);
                Connection.Open();
            }
            else
            {
                if(Connection.State.Equals(ConnectionState.Closed))
                    Connection.Open();
            }
        }

        //关闭数据库连接
        public void Close()
        {
            if(Connection.State.Equals(ConnectionState.Open))
                Connection.Close();
        }

        //析构函数,释放非托管资源
        ~DataBase()
        {
            try 
            {            
                if(Connection != null)
                    Connection.Close();
            }
            catch{}
            try{
                Dispose();
            }
            catch{}
        }
        //释放资源
        public void Dispose()
        {
            if(Connection != null)
            {
                Connection.Dispose();
                Connection = null;
            }
        }

        //是否查询到记录
        public bool GetRecord(string strSQL)
        {
            Open();
            SqlDataAdapter adapter = new SqlDataAdapter(strSQL,Connection);
            DataSet ds = new DataSet();
            adapter.Fill(ds);
            Close();

            if(ds.Tables[0].Rows.Count>0)
                return true;
            else
                return false;
        }

        //返回获得的数据值 
        //strSQL格式: select count(*) from XXX where ...
        public int GetRecordCount(string strSQL)
        {
            string count;
            Open();
            SqlCommand cmd = new SqlCommand(strSQL,Connection);
            count = cmd.ExecuteScalar().ToString().Trim();
            if(count == "")
                count="0";
            Close();
            return Convert.ToInt32(count);
        }

        //实现高级查询
        //tableName:表名,ht键:字段名,值:字段值
        public DataSet AdvancedSearch(string tableName, Hashtable ht)
        {
            int count = 0;
            string field = "";
            foreach (DictionaryEntry item in ht)
            {
                if(count != 0)
                {
                    field += " and ";
                }
                field += item.Key.ToString();
                field += " like '%";
                field += item.Value.ToString();
                field += "%'";
                count++;
            }
            field += " ";
            string strSQL = "select * from " +tableName + " where " + field;
            Open();
            SqlDataAdapter adapter = new SqlDataAdapter(strSQL,Connection);
            DataSet ds = new DataSet();
            adapter.Fill(ds);
            Close();
            return ds;
        }

        //创建带有存储过程的SqlCommand
        private SqlCommand CreateCommand(string procName,SqlParameter[] Params)
        {
            Open();
            SqlCommand cmd = new SqlCommand(procName,Connection);
            cmd.CommandType = CommandType.StoredProcedure;

            if(Params != null)
            {
                foreach (SqlParameter Parameter in Params)
                {
                     cmd.Parameters.Add(Parameter);
                }
            }
            return cmd;
        }

        //创建存储过程参数
        //参数名称,参数类型,参数大小,传递方向.
        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(value != null)
                Param.Value = value;

            return Param;
        }

        public SqlParameter MakeInParam(string ParamName, SqlParameter DbType, Int32 Size, object value)
        {
            MakeParam(ParamName,DbType,Size,ParameterDirection.Input,value);
        }

        //调用存储过程 返回影响行数(update insert delete)
        public int RunProc(string ProcName)
        {
            int count = -1;
            SqlCommand cmd = CreateCommand(ProcName,null);
            count = cmd.ExecuteNonQuery().ToString().Trim();
            Close();
            return count;
        }
        //以SqlDataReader返回
        public SqlDataReader RunProcGetReader(string ProcName)
        {
            SqlCommand cmd = CreateCommand(ProcName);
            return cmd.ExecuteReader(CommandBehavior.CloseConnection);
        }

        public SqlDataReader RunProcGetReader(string ProcName, SqlParameter[] Params)
        {
            SqlCommand cmd = CreateCommand(ProcName,Params);
            return cmd.ExecuteReader(CommandBehavior.CloseConnection);
        }

        public int RunProcGetCount(string ProcName, SqlParameter[] Params)
        {
            SqlCommand cmd = CreateCommand(ProcName,Params);
            string count= cmd.ExecuteScalar().ToString().Trim();
            if(count == "")
                count="0";
            return Convert.ToInt32(count);
        }

        //执行存储过程
        public DataSet GetDataSet(string ProcName)
        {
            Open();
            SqlDataAdapter adapter = new SqlDataAdapter(ProcName,Connection);
            DataSet ds = new DataSet();
            adapter.Fill(ds);
            Close();
            return ds;
        }
        //执行带参数的存储过程
        public DataSet GetDataSet(string ProcName, SqlParameter[] Params)
        {
            Open();
            SqlCommand cmd = CreateCommand(ProcName,Params);
            SqlDataAdapter adapter = new SqlDataAdapter(cmd);
            DataSet ds = new DataSet();
            adapter.Fill(ds);
            Close();
            return ds;
        }

        //执行SQL
        public DataSet GetDataSetSql(string strSQL)
        {
            Open();
            SqlDataAdapter adapter = new SqlDataAdapter(strSQL,Connection);
            DataSet ds = new DataSet();
            adapter.Fill(ds);
            Close();
            return ds;
        }

        //插入数据
        public int Insert(string strSQL)
        {
            int count = -1;
            Open();
            SqlCommand cmd = new SqlCommand(strSQL,Connection);
            count = cmd.ExecuteNonQuery();
            Close();
            return count;
        }

        public int GetIDInsert(string strSQL)
        {
             int count = -1;
             Open();
             SqlCommand cmd = new SqlCommand(strSQL,Connection);
             count = Convert.ToInt32(cmd.ExecuteScalar().ToString().Trim());
             Close();
             return count;
        }

        //返回DataRow
        public DataRow GetDataRow(string strSQL)
        {
            DataSet ds = GetDataSet(strSQL);
            ds.CaseSensitive = false;
            if(ds.Tables[0].Rows.Count> 0)
            {
                return ds.Tables[0].Rows[0];
            }
            else
            {
                return null;
            }
        }

        //更新数据表
        public bool Update(string tableName, Hashtable ht, string where)
        {
            int count = 0;
            if(ht.Count<=0)
                return true;
            string field ="";
            foreach(DictionaryEntry item in ht)
            {
                if(count != 0)
                    field += ", ";
                field += "[" + item.Key.ToString() + "]";
                field += "=";
                field += item.Value.ToString();
                count++;
            }
            field +=" ";

            string strSQL = "Update " +tableName + " Set "+ field + where;
            string[] sqls = {strSQL};
            return ExecuteSQL(sqls);
        }

        public bool ExecuteSQL(string[] strSQL)
        {
            bool success = true;
            Open();
            SqlCommand cmd = new SqlCommand();
            SqlTransaction trans = Connection.BeginTransaction();
            cmd.Connection = Connection;
            cmd.Transaction = trans;
            int i=0;
            try
            {
                foreach(string str in strSQL)
                {
                    cmd.CommandText = str;
                    cmd.ExecuteNonQuery();
                    i++;
                }
                trans.Commit();
            }
            catch{
                success = false;
                Close();
                trans.Rollback();
            }
            finally
            {
                Close();
            }
            return success;
        }

        public DataTable GetDataTable(string strSQL)
        {
            DataSet ds = GetDataSet(strSQL);
            ds.CaseSensitive = false;
            return ds.Tables[0];
        }

    }
}

<?xml version="1.0" encoding="utf-8"?>

<configuration>
 
    <appSettings/>
  <connectionStrings>
    <add name="ConnectionString" connectionString="Data Source=(local); Initial Catalog=数据库名; User ID=sa;Password=" providerName="System.Data.SqlClient"/>
  </connectionStrings>
 
    <system.web>
        <!--
            设置 compilation debug="true" 将调试符号插入
            已编译的页面中。但由于这会
            影响性能，因此只在开发过程中将此值
            设置为 true。
        -->
        <compilation debug="true" />
        <!--
            通过 <authentication> 节可以配置 ASP.NET 使用的
            安全身份验证模式，
            以标识传入的用户。
        -->
        <authentication mode="Windows" />
        <!--
            如果在执行请求的过程中出现未处理的错误，
            则通过 <customErrors> 节可以配置相应的处理步骤。具体说来，
            开发人员通过该节可以配置
            要显示的 html 错误页
            以代替错误堆栈跟踪。

        <customErrors mode="RemoteOnly" defaultRedirect="GenericErrorPage.htm">
            <error statusCode="403" redirect="NoAccess.htm" />
            <error statusCode="404" redirect="FileNotFound.htm" />
        </customErrors>
        -->
    </system.web>
</configuration>