How to connect to SQL Server - sql-server

Question

I am trying to connect to my database, I am beginner to the repository, dependency injection. I couldn't connect to the database.
How can I resolve this issue?
This is my code:
Controller:
public ActionResult Create(FormCollection collection)
{
try
{
return RedirectToAction("Index");
}
catch
{
return View();
}
}
Repository:
public UserMaster Add(UserMaster item)
{
using (SqlConnection sqlCon = new SqlConnection(connectionstring))
{
sqlCon.Open();
string query = "INSERT INTO Employee
VALUES (#ID, #Name, #City, #Address)";
for (int i = 0; i <= 100; i++)
{
SqlCommand sqlcmd = new SqlCommand(query, sqlCon);
sqlcmd.Parameters.AddWithValue(ID = i, Name = "newride", City = "newride", Address = "USA");
}
}
return item;
}

Answer 1

The connection is made using the connection string and the SqlConnection class - that seems to be fine in your code.
BUT: the way you're trying to insert values is all wrong - you need to use something like this:
using (SqlConnection sqlCon = new SqlConnection(connectionstring))
{
sqlCon.Open();
// SPECIFY the column you insert into!
// Without the # "query" is not recognized as a multiline string... that's why the PO is getting that VALUES does not exists in the current context...
string query = #"INSERT INTO Employee (ID, Name, City, Address)
VALUES (#ID, #Name, #City, #Address)";
for (int i = 0; i <= 100; i++)
{
SqlCommand sqlcmd = new SqlCommand(query, sqlCon);
// set the individual parameters, and AVOID "AddWithValue"
sqlcmd.Parameters.Add("#ID", SqlDbType.Int).Value = i;
sqlcmd.Parameters.Add("#Name", SqlDbType.VarChar, 100).Value = "newride";
sqlcmd.Parameters.Add("#City", SqlDbType.VarChar, 100).Value = "newride";
sqlcmd.Parameters.Add("#Address", SqlDbType.VarChar, 100).Value = "USA";
// and then *EXECUTE* the SqlCommand to actually RUN the INSERT
sqlcmd.ExecuteNonQuery();
}
}