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//Á¬½Ó×Ö·û´®
private static string connString = "Provider=Microsoft.Jet.OLEDB.4.0;;Data Source=DataBase.mdb";//DataBase.mdbÊý¾Ý¿âÎļþÃû
http://www.connectionstrings.com
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<add name="connectionString" connectionString="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|web.mdb;Persist Security Info=True" providerName="System.Data.OleDb"/>
Provider=Microsoft.ACE.OLEDB.12.0;Data Source=|DataDirectory|*.mdb;
¡°*¡±ÊÇÄãÊý¾Ý¿âµÄÃüÃû£¬°ÑÕâ¾ä»°·ÅÔÚWeb.configµÄ<appSettings>ÀïÃæ
<appSettings>
<add key="conn" value="Provider=Microsoft.ACE.OLEDB.12.0;Data Source=|DataDirectory|*.mdb;">
</appSettings>
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select * from (select * row_number() over ( partition by ÁªÏµºÅÂë order by ÒµÎñºÅÂë ) rn from ºÅÂë²éѯ) where rn<2
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ÏÂÃæÊÇ´úÂ룺string sql = "";
Óû§ user = new Óû§();
user.Name = textBox1.Text;
......