protected void Button3_Click(object sender, EventArgs e)
{
EFFristModelEntities db = new EFFristModelEntities();
//var userInfoList = from u in db.UserInfo
// where u.ID == 345
// select u;
//UserInfo userInfo=userInfoList.FirstOrDefault();//返回第一个元素，如果没有的话，返回null
//if (userInfo != null)
//{
// // db.UserInfo.Remove(userInfo);
// db.Entry<UserInfo>(userInfo).State = System.Data.EntityState.Deleted;
// db.SaveChanges();
//}
//else
//{
// Response.Write("要删除的数据不存在!!");
//}
UserInfo userInfo = new UserInfo()
{
ID = 344
};
//db.UserInfo.Remove(userInfo);
db.Entry <UserInfo>(userInfo).State = System.Data.EntityState.Deleted;
db.SaveChanges();
}
protected void Button4_Click(object sender, EventArgs e)
{
EFFristModelEntities db = new EFFristModelEntities();
var userInfoList = from u in db.UserInfo
where u.ID == 343
select u;
var userInfo = userInfoList.FirstOrDefault();
userInfo.UserPass = "******";
db.Entry <UserInfo>(userInfo).State = System.Data.EntityState.Modified;
db.SaveChanges();
}
protected void Button1_Click(object sender, EventArgs e)
{
UserInfo userInfo = new UserInfo();
userInfo.Email = "*****@*****.**";
userInfo.RegTime = DateTime.Now;
userInfo.UserName = "******";
userInfo.UserPass = "******";
EFFristModelEntities db = new EFFristModelEntities();
db.UserInfo.Add(userInfo); //将数据添加到EF并且添加了添加标记。
db.SaveChanges(); //数据才会保存到数据库。,返回受影响的行数。
Response.Write(userInfo.ID);
}
