请高手为C#写的数据库访问类(只针对SQLSERVER)加以详细的注释，拜托了
这是一个C#写的数据库访问类(只针对SQLSERVER) 我从网络上找到的，没能都读明白
尤其是作者的编写想法
如果您有时间请帮忙加以详细解释，代码不短，请帮帮忙
如果您忙，您就主要说说作者的编写想法，我感到很混乱
using System;
using
using System.Collections;
using System.Diagnostics;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
namespace
{
/// <summary>
/// Database 的摘要说明。
/// </summary>
public class Database : IDisposable
{
// 连接数据源
private SqlConnection con;
public Database()
{ }
/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="procName">存储过程的名称</param>
/// <returns>返回存储过程返回值</returns>
public int RunProc(string procName)
{
//SqlTransaction tran;
SqlCommand cmd = CreateCommand(procName, null);
cmd.ExecuteNonQuery();
this.Close();
return (int)cmd.Parameters["ReturnValue"].Value;
}
/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="procName">存储过程名称</param>
/// <param name="prams">存储过程所需参数</param>
/// <returns>返回存储过程返回值</returns>
public int RunProc(string procName, SqlParameter[] prams)
{
SqlCommand cmd = CreateCommand(procName, prams);
cmd.ExecuteNonQuery();
this.Close();
return (int)cmd.Parameters["ReturnValue"].Value;
}
/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="procName">存储过程名称</param>
/// <param name="prams">存储过程所需参数</param>
/// <returns>返回存储过程返回值</returns>
public string RunStrProc(string procName, SqlParameter[] prams)
{
SqlCommand cmd = CreatestrCommand(procName, prams);
cmd.ExecuteNonQuery();
this.Close();
return cmd.Parameters["ReturnValue"].Value.ToString();
}
/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="procName">存储过程的名称</param>
/// <param name="dataReader">返回存储过程返回值</param>
public void RunProc(string procName, out SqlDataReader dataReader)
{
SqlCommand cmd = CreateCommand(procName, null);
dataReader = cmd.ExecuteReader(System.);
}
/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="procName">存储过程的名称</param>
/// <param name="prams">存储过程所需参数</param>
/// <param name="dataReader">存储过程所需参数</param>
public void RunProc(string procName, SqlParameter[] prams, out SqlDataReader dataReader)
{
SqlCommand cmd = CreateCommand(procName, prams);
dataReader = cmd.ExecuteReader(System.);
//return (int)cmd.Parameters["ReturnValue"].Value;
}
/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="procName">存储过程的名称</param>
/// <param name="prams">存储过程所需参数</param>
/// <param name="ds">存储过程所需参数</param>
public void RunProc(string procName, ref DataSet ds)
{
SqlCommand cmd = CreateCommand(procName,null);
SqlDataAdapter sda = new SqlDataAdapter(cmd);
sda.Fill(ds);
this.Close();
}
/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="procName">存储过程的名称</param>
/// <param name="prams">存储过程所需参数</param>
/// <param name="ds">存储过程所需参数</param>
/// <param name="ds">存储过程所需参数</param>
public void RunProc(string procName, ref DataSet ds,string tablename)
{
SqlCommand cmd = CreateCommand(procName, null);
SqlDataAdapter sda = new SqlDataAdapter(cmd);
sda.Fill(ds,tablename);
this.Close();
}
/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="procName">存储过程的名称</param>
/// <param name="prams">存储过程所需参数</param>
/// <param name="ds">存储过程所需参数</param>
public void RunProc(string procName, SqlParameter[] prams, ref DataSet ds)
{
SqlCommand cmd = CreateCommand(procName, prams);
SqlDataAdapter sda = new SqlDataAdapter(cmd);
sda.Fill(ds);
this.Close();
}
/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="procName">存储过程的名称</param>
/// <param name="prams">存储过程所需参数</param>
/// <param name="ds">存储过程所需参数</param>
/// <param name="ds">存储过程所需参数</param>
public void RunProc(string procName, SqlParameter[] prams, ref DataSet ds,string tablename)
{
SqlCommand cmd = CreateCommand(procName, prams);
SqlDataAdapter sda = new SqlDataAdapter(cmd);
sda.Fill(ds,tablename);
this.Close();
}
/// <summary>
/// 创建一个SqlCommand对象以此来执行存储过程
/// </summary>
/// <param name="procName">存储过程的名称</param>
/// <param name="prams">存储过程所需参数</param>
/// <returns>返回SqlCommand对象</returns>
private SqlCommand CreateCommand(string procName, SqlParameter[] prams)
{
// 确认打开连接
Open();
SqlCommand cmd = new SqlCommand(procName, con);
= CommandType.StoredProcedure;
// 依次把参数传入存储过程
if (prams != null)
{
foreach (SqlParameter parameter in prams)
cmd.Parameters.Add(parameter);
}
// 加入返回参数
cmd.Parameters.Add(
new SqlParameter("ReturnValue", SqlDbType.Int, 4,
ParameterDirection.ReturnValue, false, 0, 0,
string.Empty, DataRowVersion.Default, null));
return cmd;
}
private SqlCommand CreatestrCommand(string procName, SqlParameter[] prams)
{
// 确认打开连接
Open();
SqlCommand cmd = new SqlCommand(procName, con);
= CommandType.StoredProcedure;
// 依次把参数传入存储过程
if (prams != null)
{
foreach (SqlParameter parameter in prams)
cmd.Parameters.Add(parameter);
}
// 加入返回参数
cmd.Parameters.Add(
new SqlParameter("ReturnValue",SqlDbType.VarChar, 50,
ParameterDirection.ReturnValue,false, 0, 0,
string.Empty, DataRowVersion.Default,DBNull.Value));
return cmd;
}
/// <summary>
/// 打开数据库连接.
/// </summary>
private void Open()
{
// 打开数据库连接
if (con == null)
{
con = new SqlConnection(ConfigurationManager.ConnectionStrings["MIConnectionString"].ToString());
}
if(con.State ==System.Data.ConnectionState.Closed)
con.Open();
}
/// <summary>
/// 关闭数据库连接
/// </summary>
public void Close()
{
if (con != null)
con.Close();
}
/// <summary>
/// 释放资源
/// </summary>
public void Dispose()
{
// 确认连接是否已经关闭
if (con != null)
{
con.Dispose();
con = null;
}
}
/// <summary>
/// 传入输入参数
/// </summary>
/// <param name="ParamName">存储过程名称</param>
/// <param name="DbType">参数类型</param></param>
/// <param name="Size">参数大小</param>
/// <param name="Value">参数值</param>
/// <returns>新的 parameter 对象</returns>
public SqlParameter MakeInParam(string ParamName, SqlDbType DbType, int Size, object Value)
{
return MakeParam(ParamName, DbType, Size, ParameterDirection.Input, Value);
}
/// <summary>
/// 传入返回值参数
/// </summary>
/// <param name="ParamName">存储过程名称</param>
/// <param name="DbType">参数类型</param>
/// <param name="Size">参数大小</param>
/// <returns>新的 parameter 对象</returns>
public SqlParameter MakeOutParam(string ParamName, SqlDbType DbType, int Size)
{
return MakeParam(ParamName, DbType, Size, ParameterDirection.Output, null);
}
/// <summary>
/// 传入返回值参数
/// </summary>
/// <param name="ParamName">存储过程名称</param>
/// <param name="DbType">参数类型</param>
/// <param name="Size">参数大小</param>
/// <returns>新的 parameter 对象</returns>
public SqlParameter MakeReturnParam(string ParamName, SqlDbType DbType, int Size)
{
return MakeParam(ParamName, DbType, Size, ParameterDirection.ReturnValue, null);
}
/// <summary>
/// 生成存储过程参数
/// </summary>
/// <param name="ParamName">存储过程名称</param>
/// <param name="DbType">参数类型</param>
/// <param name="Size">参数大小</param>
/// <param name="Direction">参数方向</param>
/// <param name="Value">参数值</param>
/// <returns>新的 parameter 对象</returns>
public SqlParameter MakeParam(string ParamName, SqlDbType DbType, int 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))
param.Value = Value;
return param;
}
}
}
[[it] 本帖最后由 ilovetea 于 2008-11-2 21:36 编辑 [/it]]
