How do you convert a List query result to view model?
Question
I have an MVC controller method List<DataRow> GetUserCriteria() which runs a standard SQL Query, no EF or automapper. After running the query it does:
DataTable dt = new DataTable();
SqlDataAdapter sdp = new SqlDataAdapter(objCommand)
conn.Open();
sdp.Fill(dt)
list = dt.AsEnumerable().ToList();
return list;
Question is in my ActionResultMethod which returns the relevant view, how can I convert that list to the right type for the view model to consume and use in the view?
public ActionResult ClientProfile() {
var rawData = GetUserCriteria();
//Convert to type for view model here and pass into the view below.
return View()
}
2 answers
solution1
1 ACCPTED 2017-05-08 23:37:25
You can avoid converting, and make it simple:
public class aDataTableView
{
public DataTable aTable { get; set; }
}
public class HomeController : Controller
{
//use any action or code that goes here
public ActionResult Index63()
{
DataTable dt = new DataTable();
SqlConnection conn = new SqlConnection(@"data source=.\sqlexpress;initial catalog=Breaz;integrated security=True");
//conn.Open();
SqlCommand objCommand = new SqlCommand("Select * from dbo.Example", conn);
SqlDataAdapter sdp = new SqlDataAdapter(objCommand);
sdp.Fill(dt);
//you are not explicitely disposing of dt
//dt.Dispose();
aDataTableView dtw = new aDataTableView { aTable = dt };
objCommand.Dispose();
sdp.Dispose();
conn.Close();
conn.Dispose();
return View(dtw);
}
@model Testy20161006.Controllers.aDataTableView
@{
Layout = null;
}
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title>Index63</title>
</head>
<body>
@using (Html.BeginForm())
{
<table border="1">
<thead>
<tr>
@foreach (System.Data.DataColumn col in Model.aTable.Columns) {
<th>@col.Caption</th>
}
</tr>
</thead>
<tbody>
@foreach(System.Data.DataRow row in Model.aTable.Rows) {
<tr>
@foreach (var cell in row.ItemArray) {
<td>@cell.ToString() </td>
}
</tr>
}
</tbody>
</table>
<input type="submit" value="click" />
}
</body>
</html>
solution2
0 2017-05-09 16:05:52
The above answer worked for the data part. I will just add that in the case of what I am doing, I was able to achieve it by doing the following in my controller:
public ActionResult Index63() {
DataTable dt = new DataTable();
SqlConnection conn = new SqlConnection(@"data source=.\sqlexpress;initial catalog=Breaz;integrated security=True");
//conn.Open();
SqlCommand objCommand = new SqlCommand("Select * from dbo.Example", conn);
SqlDataAdapter sdp = new SqlDataAdapter(objCommand);
sdp.Fill(dt);
aDataTableView dtw = new aDataTableView { aTable = dt };
//Cast Each Row Element to an object
object FirstNameField = dt.Row[0][3]
//Map user values to model backing view
Index63ViewModel userViewModel = new Index63ViewModel();
userViewModel.FirstName = FirstNameField.ToString();
return(userViewModel)
}
This approach works for passing a single user profile data to the view which is what I needed in this case. Credit is also given to the above link as well. Thank you!
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