MVC alert message from controller using JavaScript alert message from controller using JavaScript, someone asked me to explain?

In this article I will show to show JavaScript alert message in from mvc Controller. The message from the controller displayed as alert message using ViewBag. It will simply return alert on pageload.

Step 1Create an mvc project and right click on the controller folder and create a new controller and name it as HomeController. Inside the HomeController copy and paste the following code.

public ActionResult Index()
            return View();

        public ActionResult Index(string name)
            ViewBag.Message = String.Format("Hello{0}.\\ncurrent Date and time:{1}", name, DateTime.Now.ToString());
            return View();

Step 2: Right click on the Share folder and create a razor view named as index. Copy and paste the following code.

<div style="border: 1px solid gray; height: 310px; width: 450px">
    <h2>Alert Message From Controller</h2>
    @using (Html.BeginForm("Index", "Alert", FormMethod.Post))
        <input type="text" id="txtName" name="name" /> 
        <input type="submit" id="btnSubmit" value="Get Current Time" /> 
    @if (ViewBag.Message != null)
        <script type="text/javascript">
            window.onload = function () {
                document.getElementById("txtName").value= "@ViewBag.Message";

asp net alert message from controller using viewbag


Here I am displaying current server datetime in the JavaScript alert messge using ViewBag object from the mvc controller action method.

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