In this article I will explain with an example, how to truncate table using Entity Framework in ASP.Net MVC.
Note: For beginners in ASP.Net MVC and Entity Framework, please refer my article ASP.Net MVC: Simple Entity Framework Tutorial with example. It covers all the information needed for connecting and configuring Entity Framework.
 
 

Database

I have made use of the following table Customers with the schema as follow.
ASP.Net MVC: Truncate Table using Entity Framework
 
I have already inserted few records in the table.
ASP.Net MVC: Truncate Table using Entity Framework
 
Note: You can download the database table SQL by clicking the download link below.
            Download SQL file
 
 

Entity Framework Model

Once the Entity Framework is configured and connected to the database table, the Model will look as shown below.
ASP.Net MVC: Truncate Table using Entity Framework
 
 

Controller

The Controller consists of following Action methods.

Action method for handling GET operation

Inside this Action method, simply the View is returned.
 

Action method for handling POST operation

Inside the Action Method, all the records are removed from the table using ExecuteSqlCommand function of Entity Framework which accepts the following parameters.
SQL Query - SQL Query to be executed.
Then, a success message is set to a TempData object named “Message”.
Finally, the page is redirected to Index Action method.
public class HomeController : Controller
{
    // GET: Home
    public ActionResult Index()
    {
        return View();
    }
 
    [HttpPost]
    public ActionResult Truncate()
    {
        AjaxSamplesEntities entities = new AjaxSamplesEntities();
        // Truncate Table to delete all records.
        entities.Database.ExecuteSqlCommand("TRUNCATE TABLE Customers");
        entities.SaveChanges();
        TempData["Message"] = "Customers Table has been truncated.";
        return RedirectToAction("Index");
    }
}
 
 

View

HTML Markup

The View consists of HTML Form which has been created using the Html.BeginForm method with the following parameters.
asp-action – Name of the Action. In this case the name is Truncate.
asp-controller – Name of the Controller. In this case the name is Home.
method – It specifies the Form Method i.e. GET or POST. In this case it will be set to POST.
The form consists of submit button.
The TempData object named Message is checked for NULL and if it is not NULL then the value of the object is displayed using JavaScript Alert MessageBox.
@{
     Layout = null;
}
 
<!DOCTYPE html>
 
<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>Index</title>
</head>
<body>
    @using (Html.BeginForm("Truncate", "Home", FormMethod.Post))
    {
        <input type="submit" id="btnSubmit" value="Truncate" />
    }
    @if (TempData["Message"] !=  null)
    {
        <script type="text/javascript">
            window.onload = function () {
                alert('@TempData["Message"]');
            };
        </script>
    }
</body>
</html>
 
 

Screenshot

ASP.Net MVC: Truncate Table using Entity Framework
 
 

Downloads

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