Question

I have code, which returns me a row out of a database,

            con = new System.Data.SqlClient.SqlConnection();
            dsl = new DataSet();
            con.ConnectionString = "Data Source=.\\SQLEXPRESS;AttachDbFilename=C:\\tbl.mdf;Integrated Security=True;Connect Timeout=30;User Instance=True";

            con.Open();

            string sql = "SELECT * From tbl_fb";
            da = new System.Data.SqlClient.SqlDataAdapter(sql, con);
            da.Fill(dsl, "fb");
            DataRow dRow = dsl.Tables["fb"].Rows[0];
            ViewData["a"] = dRow.ItemArray.GetValue(1).ToString();

            ViewData["b"] = "afagjma";
            con.Close();

Is there a way, that I could use a loop to get all rows from table. The number of rows are unknown.
I know I can do it with a loop, by using the variable (i) instead of numbers. But then I would need to use the ViewData array, which is problem for me.

Example: ViewData[“a”][i];

Answer 1

You should set up a class that defines what data you’re returning from your database.

For instance:

public class Customer  
{
   public int Id { get; set;} 
   public string Name { get; set;} 
} 

And then you would create a List<Customer>(), and set this as the Model for your MVC Page.

For instance:

var data = new new List<Customer>();    
ViewData.Model = data; 

And load your data into your list:

foreach(var row in dsl.Tables["fb"].Rows)
{
   var customer = new Customer(); 
   customer.Id = row.Field<int?>("Id"); 
   customer.Name = row.Field<string>("Name");
   data.Add(customer);
}

And then, on your MVC Page, set the <%@ Page %> header to have the Inherits attribute like so:

<%@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage<IEnumerable<Customer>>" %>

Now finally you can bind directly to the Model within the page:

<% foreach (var item in Model) { %>
  Customer Id: <%: item.Id %>
  Name: <%: item.Name %>
<% } %>