一、删除
string constr = "server=.;database=test;uid=sa;pwd=sa";
SqlConnection myconnection = new SqlConnection(constr);
myconnection.Open();
string sql = "delete from students where ID=5";
SqlCommand sc = new SqlCommand(sql,myconnection);
sc.ExecuteNonQuery();
SqlDataAdapter sda = new SqlDataAdapter("select * from students",myconnection);
System.Data.DataSet dr = new System.Data.DataSet();
sda.Fill(dr,"students");
sda.Update(dr,"students");
ViewBag.students = dr.Tables[0];
return View();
二、插入
string constr = "server=.;database=test;uid=sa;pwd=sa";
SqlConnection myconnection = new SqlConnection(constr);
myconnection.Open();
string sql1 = "insert into students(sno,name,sex,age) values(‘101411‘,‘历历‘,‘男‘,‘18‘)";
SqlCommand sc = new SqlCommand(sql1, myconnection);
sc.ExecuteNonQuery();
string sql = "select * from students";
SqlDataAdapter sda = new SqlDataAdapter(sql,myconnection);
System.Data.DataSet ds = new System.Data.DataSet();
sda.Fill(ds,"students");
ViewBag.students = ds.Tables[0];
return View();
三、更新
string constr = "server=.;database=test;uid=sa;pwd=sa";
SqlConnection myconnection = new SqlConnection(constr);
myconnection.Open();
string sql1 = "update students set sno=‘1‘,name=‘华华‘ where ID=2";
SqlCommand sc = new SqlCommand(sql1, myconnection);
sc.ExecuteNonQuery();
string sql = "select * from students";
SqlDataAdapter sda = new SqlDataAdapter(sql, myconnection);
System.Data.DataSet ds = new System.Data.DataSet();
sda.Fill(ds, "students");
ViewBag.students = ds.Tables[0];
return View();
原文：http://www.cnblogs.com/dingfangbo/p/5769495.html