c 資料庫操作類

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;

namespace mysqlserver

///

/// 公開方法dbconn，返回資料庫連線

///

///

public sqlconnection dbconn()

catch (exception)

}///

/// 公開屬性errormessage，返回錯誤資訊

///

public string errormessage

}///

/// 根據查詢語句從資料庫檢索資料

///

/// 查詢語句

/// 資料庫連線

/// 有資料則返回dataset物件，否則返回null

public dataset select(string selectstring, sqlconnection sqlconn)

else

trysqldataadapter mysqldataadapter = new sqldataadapter();

sqlcommand selectcommand = new sqlcommand(selectstring, conn);

selectcommand.commandtype = commandtype.text;

mysqldataadapter.selectcommand = selectcommand;

dataset myds = new dataset();

mysqldataadapter.fill(myds);

return myds;

}catch (exception e)

finally}}

///

/// 更新資料庫

///

/// update sql語句

/// 資料庫連線

/// 更新成功返回true

public bool update(string updatestring, sqlconnection sqlconn)

///

/// 從資料庫中刪除資料

///

/// delete sql語句

/// 資料庫連線

/// 刪除成功返回true

public bool delete(string deletestring, sqlconnection sqlconn)

///

/// 把資料插入資料庫

///

/// insert sql語句

/// 資料庫連線

/// 插入成功返回true

public bool insert(string insertstring, sqlconnection sqlconn)

///

/// 根據sql語句更新資料庫

///

/// 更新語句

/// 資料庫連線

/// 更新成功則返回true

public bool udidatabase(string udistring, sqlconnection sqlconn)

else

trysqlcommand cmd = new sqlcommand(udistring, conn);

cmd.commandtype = commandtype.text;

intcount = cmd.executenonquery();

return !(intcount < 1);

}catch (exception e)

finally}}

}}-----------------------------

兩種呼叫方法

1、                    string struserpsw = userpsw.text.trim();

string userpassword = system.web.security.formsauthentication.hashpasswordforstoringinconfigfile(struserpsw, "md5");//md5加密

sqlserverdatabase obj = new sqlserverdatabase();

obj.insert("insert into asuserinfo (username,userpassword,question,answer,createtime) values('" + username.text.trim() + "','" + userpassword + "','" + question.text.trim() + "','" + answer.text.trim() + "','" + datetime.now.tostring() + "' )", null);

2、        private bool isusernameexist(string strusername)

else

return bret;

}

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