一个写的非常漂亮的数据库操作类

这段代码包含了除对视图的操作外的所有数据库操作，写的很漂亮，写在这里可以不断的欣赏 。

using System;
using System.Collections;
using System.Collections.Specialized;
using System.Runtime.Remoting.Messaging;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;

namespace DB

{
    /// <summary>
    /// ADO.NET数据库操作基础类。
    /// </summary>
    public abstract class DbManagerSQL
    {
        //数据库连接字符串
        protected static string connectionString = ConfigurationSettings.AppSettings["ConnectionString"];
        public DbManagerSQL()
        {
            //
            // TODO: 在此处添加构造函数逻辑
            //
        }

        /// 执行SQL语句，返回影响的记录数
        public static int ExecuteSql(string SQLString)
        {
            SqlConnection connection = new SqlConnection(connectionString);

            {
                SqlCommand cmd = new SqlCommand(SQLString, connection);
                {
                    try
                    {
                        connection.Open();
                        int rows = cmd.ExecuteNonQuery();
                        return rows;
                    }
                    catch (System.Data.SqlClient.SqlException E)
                    {
                        throw new Exception(E.Message);
                    }
                }
            }
        }

        /// 执行两条SQL语句，实现数据库事务。

        public static void ExecuteSqlTran(string SQLString1, string SQLString2)
        {
            SqlConnection connection = new SqlConnection(connectionString);
            {
                connection.Open();
                SqlCommand cmd = new SqlCommand();
                cmd.Connection = connection;
                SqlTransaction tx = connection.BeginTransaction();
                cmd.Transaction = tx;
                try
                {
                    cmd.CommandText = SQLString1;
                    cmd.ExecuteNonQuery();
                    cmd.CommandText = SQLString2;
                    cmd.ExecuteNonQuery();
                    tx.Commit();
                }
                catch (System.Data.SqlClient.SqlException E)
                {
                    tx.Rollback();
                    throw new Exception(E.Message);
                }
                finally
                {
                    cmd.Dispose();
                    connection.Close();
                }
            }
        }

        // 执行多条SQL语句，实现数据库事务，每条语句以“;”分割。
        public static void ExecuteSqlTran(string SQLStringList)
        {
            OdbcConnection conn = new OdbcConnection(connectionString);
            {
                conn.Open();
                OdbcCommand cmd = new OdbcCommand();
                cmd.Connection = conn;
                OdbcTransaction tx = conn.BeginTransaction();
                cmd.Transaction = tx;
                try
                {
                    string[] split = SQLStringList.Split(new Char[] { ';' });
                    foreach (string strsql in split)
                    {
                        if (strsql.Trim() != "")
                        {
                            cmd.CommandText = strsql;
                            cmd.ExecuteNonQuery();
                        }
                    }
                    tx.Commit();
                }
                catch (System.Data.Odbc.OdbcException E)
                {
                    tx.Rollback();
                    throw new Exception(E.Message);
                }
            }
        }

        // 执行带一个存储过程参数的的SQL语句。
        public static int ExecuteSql(string SQLString, string content)
        {
            SqlConnection connection = new SqlConnection(connectionString);
            {
                SqlCommand cmd = new SqlCommand(SQLString, connection);
                System.Data.SqlClient.SqlParameter myParameter = new System.Data.SqlClient.SqlParameter("@content", SqlDbType.NText);
                myParameter.Value = content;
                cmd.Parameters.Add(myParameter);
                try
                {
                    connection.Open();
                    int rows = cmd.ExecuteNonQuery();
                    return rows;
                }
                catch (System.Data.SqlClient.SqlException E)
                {
                    throw new Exception(E.Message);
                }
                finally
                {
                    cmd.Dispose();
                    connection.Close();
                }
            }
        }

        // 向数据库里插入图像格式的字段
        public static int ExecuteSqlInsertImg(string strSQL, byte[] fs)
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                SqlCommand cmd = new SqlCommand(strSQL, connection);
                System.Data.SqlClient.SqlParameter myParameter = new System.Data.SqlClient.SqlParameter("@fs", SqlDbType.Image);
                myParameter.Value = fs;
                cmd.Parameters.Add(myParameter);
                try
                {
                    connection.Open();
                    int rows = cmd.ExecuteNonQuery();
                    return rows;
                }
                catch (System.Data.SqlClient.SqlException E)
                {
                    throw new Exception(E.Message);
                }
                finally
                {
                    cmd.Dispose();
                    connection.Close();
                }
            }
        }

        // 执行一条计算查询结果语句，返回查询结果（整数）。
        public static int GetCount(string strSQL)
        {
            SqlConnection connection = new SqlConnection(connectionString);
            {
                SqlCommand cmd = new SqlCommand(strSQL, connection);
                try
                {
                    connection.Open();
                    SqlDataReader result = cmd.ExecuteReader();
                    int i = 0;
                    while (result.Read())
                    {
                        i = result.GetInt32(0);
                    }
                    result.Close();
                    return i;
                }
                catch (System.Data.SqlClient.SqlException e)
                {
                    throw new Exception(e.Message);
                }
                finally
                {
                    cmd.Dispose();
                    connection.Close();
                }
            }
        }

        /// 执行一条计算查询结果语句，返回查询结果（object）
        public static object GetSingle(string SQLString)
        {
            SqlConnection connection = new SqlConnection(connectionString);
            SqlCommand cmd = new SqlCommand(SQLString, connection);
            try
            {
                connection.Open();
                object obj = cmd.ExecuteScalar();
                if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
                {
                    return null;
                }
                else
                {
                    return obj;
                }
            }
            catch (System.Data.SqlClient.SqlException e)
            {
                throw new Exception(e.Message);
            }
            finally
            {
                cmd.Dispose();
                connection.Close();
            }
        }

        /// 执行查询语句，返回SqlDataReader
        public static SqlDataReader ExecuteReader(string strSQL)
        {
            SqlConnection connection = new SqlConnection(connectionString);

            SqlCommand cmd = new SqlCommand(strSQL, connection);
            SqlDataReader myReader;
            try
            {
                connection.Open();
                myReader = cmd.ExecuteReader();
                return myReader;
            }
            catch (System.Data.SqlClient.SqlException e)
            {
                throw new Exception(e.Message);
            }
            finally
            {
                cmd.Dispose();
                connection.Close();
            }
        }

        // 执行查询语句，返回DataSet
        public static DataSet Query(string SQLString)
        {
            SqlConnection connection = new SqlConnection(connectionString);

            DataSet ds = new DataSet();
            try
            {
                connection.Open();
                SqlDataAdapter command = new SqlDataAdapter(SQLString, connection);
                command.Fill(ds, "ds");
            }
            catch (System.Data.SqlClient.SqlException ex)
            {
                throw new Exception(ex.Message);
            }
            return ds;

        }

    }
}