.net MVC 连接数据本地数据库三种方法总结

 <appSettings>
 <add key="webpages:Version" value="2.0.0.0" />
 <add key="webpages:Enabled" value="false" />
 <add key="PreserveLoginUrl" value="true" />
 <add key="ClientValidationEnabled" value="true" />
 <add key="UnobtrusiveJavaScriptEnabled" value="true" />
 <add key="con" value="server=.\sqlexpress; user id = sa;password = a123456;database = xsgl1;max pool size=512;"/>
 </appSettings>
 <connectionStrings>
 <add name="conSql" connectionString="server=(local)\sqlexpress; User Id = sa;password = a123456;database = xsgl1;max pool size=512;"/>
 </connectionStrings> 

Configuration

 public class HomeController : Controller
 {
 //
 // GET: /Home/
 
 public ActionResult Index()
 {
 #region connect sql function one
 SqlConnectionStringBuilder one = new SqlConnectionStringBuilder();
 one.DataSource = "(local)\\sqlexpress";
 one.InitialCatalog = "xsgl1";
 one.UserID = "sa";
 one.Password = "a123456";
 one.MaxPoolSize = 512;
 SqlConnection sct = new SqlConnection(one.ConnectionString);
 #endregion
 #region connect sql function two
 //string conn = ConfigurationManager.AppSettings["con"].ToString();
 //SqlConnection sct = new SqlConnection(conn);
 #endregion
 #region connect sql function three
 //string conn = ConfigurationManager.ConnectionStrings["conSql"].ConnectionString;
 //SqlConnection sct = new SqlConnection(conn);
 #endregion
 SqlCommand scm = new SqlCommand();
 scm.Connection = sct;
 scm.CommandType = CommandType.Text;
 scm.CommandText = "select 课程名 from kc where 课程号='A001'";
 sct.Open();
 SqlDataReader sdr = scm.ExecuteReader();
 if (sdr.Read())
 {
 ViewBag.hao = sdr["课程名"];
 }
 sdr.Close();
 return View();
 }
 public ActionResult About()
 {
 return View();
 }
 }

Controller

@{
 ViewBag.Title = "Index";
 }
 @ViewBag.hao
 <h2>Index</h2>