烂菜博

我的Blog重建工作今天开始，我将一步一步的贴出我Blog的所有制作工作，希望有经验的朋友来提提建议。
新建的一个Common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.Collections;

/// <summary>
/// ADO.NET数据库操作基础类。
/// </summary>
public class Common
{
    //数据库连接字符串
    protected static string connectionString = ConfigurationManager.ConnectionStrings["BlogStrings"].ConnectionString;

    public Common()
    {
        //
        // TODO: 在此处添加构造函数逻辑
        //

    }

    /// <summary>
    /// 执行SQL语句，返回影响的记录数
    /// </summary>
    /// <param name="SQLString"></param>
    /// <returns></returns>
    public static int ExecuteSql(string SQLString)
    {
        using (SqlConnection connection = new SqlConnection(connectionString))
        {
            using (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);
                }
            }
        }
    }
    /// <summary>
    /// 执行两条SQL语句，实现数据库事务。
    /// </summary>
    /// <param name="SQLString1"></param>
    /// <param name="SQLString2"></param>
    public static void ExecuteSqlTran(string SQLString1, string SQLString2)
    {
        using (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();
            }
        }
    }
    /// <summary>
    /// 执行多条SQL语句，实现数据库事务，每条语句以“;”分割。
    /// </summary>
    /// <param name="SQLStringList"></param>
    public static void ExecuteSqlTran(string SQLStringList)
    {
        using (SqlConnection conn = new SqlConnection(connectionString))
        {
            conn.Open();
            SqlCommand cmd = new SqlCommand();
            cmd.Connection = conn;
            SqlTransaction 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.SqlClient.SqlException E)
            {
                tx.Rollback();
                throw new Exception(E.Message);
            }
        }
    }
    /// <summary>
    /// 执行带一个存储过程参数的的SQL语句。
    /// </summary>
    /// <param name="SQLString"></param>
    /// <param name="content"></param>
    /// <returns></returns>
    public static int ExecuteSql(string SQLString, string content)
    {
        using (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();
            }
        }
    }
    /// <summary>
    /// 向数据库里插入图像格式的字段
    /// </summary>
    /// <param name="strSQL"></param>
    /// <param name="fs"></param>
    /// <returns></returns>
    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();
            }

        }
    }
    /// <summary>
    /// 执行一条计算查询结果语句，返回查询结果（整数）。
    /// </summary>
    /// <param name="strSQL"></param>
    /// <returns></returns>
    public static int GetCount(string strSQL)
    {
        using (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();
            }
        }
    }
    /// <summary>
    /// 执行一条计算查询结果语句，返回查询结果（object）。
    /// </summary>
    /// <param name="SQLString"></param>
    /// <returns></returns>
    public static object GetSingle(string SQLString)
    {
        using (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();
            }
        }
    }
    /// <summary>
    /// 执行查询语句，返回SqlDataReader
    /// </summary>
    /// <param name="strSQL"></param>
    /// <returns></returns>
    public static SqlDataReader ExecuteReader(string strSQL)
    {
        using (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();
            }
        }
    }
    /// <summary>
    /// 执行查询语句，返回DataSet
    /// </summary>
    /// <param name="SQLString"></param>
    /// <returns></returns>
    public static DataSet Query(string SQLString)
    {
        using (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;
        }

    }