取连接字符串
string connString = System.Web.Configuration.WebConfigurationManager.ConnectionStrings["SqlConnStr"].ConnectionString;
web.config文件:
<connectionStrings>
<remove name="LocalSqlServer" />
<add name="SqlConnStr" connectionString="user id=sa;password=sa;initial catalog=YktSms;data source=bing\sql2000" />
</connectionStrings>
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