getting all rows from db mvc asp.net - asp.net-mvc

Question

var listdata = db.UserDetails.Select(m => new SelectListItem
{
Value = m.userid.ToString(),
Text = string.Format("{0}{1}{2}{3}",m.bankname,m.userid,m.gender,m.name)
});
Here UserDetails is the table that is present in the database and this is the way i am trying to display every entry of the table.
Controller
[HttpGet]
public ActionResult getAll()
{
var listdata = db.UserDetails.Select(m => new SelectListItem
{
Value = m.userid.ToString(),
Text = string.Format("{0}{1}{2}{3}",m.bankname,m.userid,m.gender,m.name)
});
return View("getAll", listdata);
}
View
#model UserApp.Models.UserDetails
#{
ViewBag.Title = "getAll";
}
<h2>getAll</h2>
#foreach (var item in Model)
{
<tr>
<td>
#Html.DisplayFor(modelItem => item.name)
</td>
<td>
#Html.DisplayFor(modelItem => item.gender)
</td>
</tr>
}
Model
namespace UserApp.Models
{
public class UserModel : IEnumerable<UserModel>
{
public int userid {get; set;}
public string name{get; set;}
public IList<SelectListItem> bankname { get; set; }
public string gender{get; set;}
}
}
How do i get the elements and display them properly on the view?
I can't seem to get a proper solution.
Stuck on this thing for hours.
P.s: new to it, any help will be appreciated.

Answer 1

First, add ToList() for your listdata to make it list, currently it is still IQueryable , second your view accepts model, you are passing list of model, I guess you want that to be list not model, something like this
#model List<UserApp.Models.UserDetails>
Third, you are selecting SelectListItem but you are using UserApp.Models.UserDetails, I think you should be doing something like this
var listdata = db.UserDetails.ToList().Select(x => new UserApp.Models.UserDetails {
userid = x.userid, (repeat the same for all)
}).ToList();
because looking at your code you don't need selectListItem, you need UserApp.Models.UserDetails.
That should fix all your problems, I hope I didn't miss any.

Answer 2

My approach may not be the best approach but it seems to work for me.
I usually have my model for the item :
model :
namespace UserApp.Models
{
public class UserModel
{
public int userid {get; set;}
public string name{get; set;}
public IList<SelectListItem> bankname { get; set; }
public string gender{get; set;}
}
}
Then I have in my database class ( a class that calls the database and populates the queries etc: Call it CodeDB() for this example)
DB getter :
public List<UserModel> getUsers(){
{
List<UserModel> myUsers = new List<userModel>();
// however you are accessing your db do it here
string sql = "select * ...";
//access DB
//open connection
//run query command usually for me it is rdr = cmd.ExecuteReader();
while(rdr.Read()){
UserModel retrievedUser = new UserModel();
retrievedUser.userid = (int)rdr[0];
retrievedUser.name = rdr[1].ToString();
... add the other fields
myUsers.Add(retrievedUser);
}
//close db connection
return myUsers
}
In my Controller
//call my database class
CodeDB() DB = new CodeDB()
[HttpGet]
public ActionResult getAll()
{
List<UserModel> viewUsers = DB.getUsers();
ViewBag.users = viewUsers
return View();
}
in the view
#{
if(Viewbag.users != null)
{
foreach(UserApp.Models.UserModel u in ViewBag.users)
{
#Html.Raw( " userID : " + u.userid +" Gender : " + u.gender)
}
}
}

Answer 3

I think you could do. MVC Scaffolding of Crud with there Views Auto Generated
When you make your controller There's an option "MVC Controller with Views"
Then it will ask For your Model that you want to use for scaffolding which will be
"UserModel" Then just give your Controller a Name.
Now if you look at the Index View of your Controller it will have all the attributes you want and don't want.But of course, you can remove the unnecessary attributes
Hope this helps!