//---------------------------------------------------
//日期: 2002.1.10
//作者: raxzhang
//版权: raxzhang
//环境: Microsoft Visual Studio.Net 7.0
//语言: Visual C#
//类型: 类文件,编译后为.dll文件
//描述: 这是作为对数据操作的最常用的属性和方法类。
// 是一个基础类。可以被继承和扩展。
//注意: 使用这个类的条件是-1.dbo用户。2.存储过程的
// 参数名与表的字段名相差一个@
//---------------------------------------------------
using System;
using System.Collections;
using System.Data;
using System.Data.SqlClient;
namespace zyq.DBMapping
{
///
/// 对SQL server进行操作
///
public class DataAccessSQL
{
#region class variables
private String connectionString;
private int _tablecount=-1;
private int _stroeprocedurecount=-1;
private SqlConnection conn=null;
#endregion
#region properties of class
///
/// 属性:数据库存储过程的个数(stat>0)
///
public int StroeProcedureCount
{
get
{
if (this._stroeprocedurecount !=-1)
{
return this._stroeprocedurecount;
}
else
{
return this.GetStroeProcedures().Count;
}
}
}
///
/// 属性:数据库用户表的个数
///
public int TablesCount
{
get
{
if(this._tablecount !=-1)
{
return this._tablecolscount;
}
else
{
return this.GetTables().Count;
}
}
}
#endregion
#region structure of class
///
/// 构造函数
///
///
数据库连接字符串,string
public DataAccessSQL(string ConnectionString)
{
this.connectionString=ConnectionString;
this.conn =new SqlConnection(this.connectionString);
}
#endregion
#region Methods of class
///
/// 获得数据库的所有表对象
///
///
System.Data.SqlClient.SqlDataReader
public Hashtable GetTables()
{
try
{
Hashtable sptable=new Hashtable();
//验证连接
if(conn!=null && conn.State!=ConnectionState.Open)
{
conn.Open();
}
else
{
conn= new SqlConnection(this.connectionString);
conn.Open();
}
string Query = " select name, Id from sysobjects where (type='U') and (name <> 'dtproperties') order by name ";
//获得指定数据库中的所有用户表的名称和ID
SqlCommand comm= new SqlCommand(Query,conn);
SqlDataReader reader=comm.ExecuteReader(CommandBehavior.CloseConnection);
//录制Hashtable
while(reader.Read())
{
sptable.Add(reader.GetInt32(1),reader.GetString(0));
}
this._tablecount =sptable.Count;
return sptable;
}
catch(SqlException se)
{
throw(se);
}
}
///
/// 获得数据库的存储过程的名称及ID列表
///
///
HasTable
public Hashtable GetStroeProcedures()
{
try
{
//验证连接
if(conn!=null && conn.State!=ConnectionState.Closed)
{
conn.Open();
}
else
{
conn= new SqlConnection(this.connectionString);
conn.Open();
}
Hashtable sptable=new Hashtable();
string Query = " SELECT name, id FROM sysobjects WHERE (type = 'p') AND (status > 0) ";
//获得指定数据库中的所有用户存储过程的名称和ID
SqlCommand comm= new SqlCommand(Query,conn);
SqlDataReader reader=comm.ExecuteReader(CommandBehavior.CloseConnection);
//录制Hashtable
while(reader.Read())
{
sptable.Add(reader.GetInt32(1),reader.GetString(0));
}
this._stroeprocedurecount =sptable.Count;
return sptable;
}
catch(SqlException se)
{
throw(se);
}
catch(Exception e)
{
throw(e);
}
finally
{
if(conn.State==ConnectionState.Open )
conn.Close();
}
}
///
///获得数据库的指定表的列对象定义
///
///
表名称
///
DataSet
public DataSet getTableColumns(string spname)
{
try
{
Int32 spid=-1; //指定表的ID号初始
//验证连接
if(conn!=null && conn.State!=ConnectionState.Closed)
{
conn.Open();
}
else
{
conn= new SqlConnection(this.connectionString);
conn.Open();
}
//获取指定表名的ID号
SqlCommand comm= new SqlCommand("SELECT id FROM dbo.sysobjects WHERE name = '"+spname,conn);
SqlDataReader reader=comm.ExecuteReader(CommandBehavior.CloseConnection);
while(reader.Read())
{
spid = reader.GetInt32(0);
}
reader.Close();
//验证ID
if(spid==0 ||spid==-1)
throw new Exception ("StroedProcedure is not existed!");
//获得表的列定义
return getTableColumns(spid);
}
catch(SqlException se)
{
throw(se);
}
finally
{
if(conn.State ==ConnectionState.Open)
conn.Close();
}
}
///
/// 获得数据库的指定表的列对象定义的列数组
///
///
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