编辑web.config文件
<connectionStrings>
<add name="ConnectionString" connectionString="data source=(localdb)\v11.0;AttachDbFilename=|DataDirectory|\ webdevelop.mdf;Integrated Security=True;Connect Timeout=30;"/>
</connectionStrings>
<system.web>
<add name="ConnectionString" connectionString="data source=(localdb)\v11.0;AttachDbFilename=|DataDirectory|\ webdevelop.mdf;Integrated Security=True;Connect Timeout=30;"/>
</connectionStrings>
<system.web>
红色字体就是自己定义的数据库的名字 采用windows 验证