html.validation asp.net razor - asp.net-mvc

Question

How can I add a simple validation in my code? If value = 0 I don't want the controller to process the form. If anything else is selected except 0, I want the controller to process the form.
#using (Html.BeginForm("GenerateReport", "Admin", FormMethod.Get))
{
<select id="reportId" name="reportId" class="form-control">
<option value="0">Select</option>
<option value="1">Religion</option>
<option value="2">Address</option>
<option value="3">Job</option>
<option value="4">Degree</option>
<option value="7">Age</option>
</select>
<input type="submit" value="Print" id="rlist_type" />
}

Answer 1

This article provides basic information on ASP.NET MVC 5 validation
http://www.asp.net/mvc/overview/getting-started/introduction/adding-validation
I would leave the value for the first option empty then add a [Required] attribute on the object that I was using to capture the form post.
public class AdminScreenFormPost
{
[Required]
public int reportId { get; set; }
}
Inside the controller add
if (!ModelState.IsValid)
{
return View();
}
In the razor view add this so it will displays the validation results
#Html.ValidationSummary(true)
I would also look into ModelState.AddModelError
ModelState.AddModelError("MyDropDownListKey", "Please Select");