一个有关问题

请教大家一个问题！
为什么数据库中更新不了！

  string   mytitle   =   title.Text;
                string   mycontent   =   content.Value;
                string   ConnectionString   =   "Provider=Microsoft.Jet.OLEDB.4.0;Data   Source= "   +   Server.MapPath( "..//bbs//netdatamdb//netrencaiwang.mdb ");

                OleDbConnection   myconn   =   new   OleDbConnection(ConnectionString);
                myconn.Open();
                string   cmdText   =   @ "update   peixun   set   ptitle= ' "+mytitle+ " ',pcontent= ' "+mycontent+
                        @ " '     where   id= "+Session[ "newsid "];
                OleDbCommand   mycommand   =   new   OleDbCommand();
                mycommand.Connection   =   myconn;
                mycommand.CommandText   =   cmdText;
                mycommand.ExecuteNonQuery();
                myconn.Close();
                Response.Write( " <script> alert( '更新成功！ ') </script> ");

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调试到string cmdText = @ "update peixun set ptitle= ' "+mytitle+ " ',pcontent= ' "+mycontent+ @ " ' where id= "+Session[ "newsid "];
看看cmdText是什么内容。会不会是Session[ "newsid "]没内容？
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调试到string cmdText = @ "update peixun set ptitle= ' "+mytitle+ " ',pcontent= ' "+mycontent+ @ " ' where id= "+Session[ "newsid "];
看看cmdText是什么内容。会不会是Session[ "newsid "]没内容？

------解决方案--------------------------------------------------------
程序错了,怎么每一句后面有分号啊,
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string cmdText = "update peixun set ptitle= ' " + mytitle + " ',pcontent= ' " + mycontent + " ' where id = " + Session[ "newsid "].ToString();

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如果你的id是字符类型的，那就像amandag(高歌)说的那样，判断id的时候用Session[ "newid "].ToString();
Session[ "newid "]是object类型，要转成string类型才能比较！
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如果数据库里 id是整数类型
string cmdText = "update peixun set ptitle= ' " + mytitle + " ',pcontent= ' " + mycontent + " ' where id = " + Convert.ToInt32(Session[ "newsid "]);

如果数据库里 id是字符类型
string cmdText = "update peixun set ptitle= ' " + mytitle + " ',pcontent= ' " + mycontent + " ' where id = ' " + Convert.ToString(Session[ "newsid "]) + " ' ";


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用断点跟踪看cmdText的数据是否正确..
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