Asp.net mvc javascript add new textbox and post

A classic scenario!

To add a new textbox dynamically using JavaScript in an ASP.NET MVC application and then post the data to the server, you'll need to follow these steps:

Step 1: Create a partial view for the new textbox

Create a new partial view (e.g., _NewTextBox.cshtml) in the Views/Shared folder:

@model string

<div>
    <input type="text" id="newTextBox" name="newTextBox" />
</div>

This partial view will render a new textbox with the name newTextBox.

Step 2: Add a JavaScript function to add the new textbox

In your main view (e.g., Index.cshtml), add a JavaScript function that will add the new textbox dynamically:

<script>
    function addNewTextBox() {
        var newTextBox = $('<div>').append($('<input>').attr({
            type: 'text',
            id: 'newTextBox',
            name: 'newTextBox'
        }));
        $('#textBoxContainer').append(newTextBox);
    }
</script>

This function creates a new div element, appends a new input element to it, and then appends the div element to a container element with the ID textBoxContainer.

Step 3: Add a container element for the new textbox

In your main view (e.g., Index.cshtml), add a container element (e.g., a div) where the new textbox will be appended:

<div id="textBoxContainer"></div>

Step 4: Call the JavaScript function to add the new textbox

In your main view (e.g., Index.cshtml), add a button or link that will trigger the JavaScript function to add the new textbox:

<button onclick="addNewTextBox()">Add New TextBox</button>

Step 5: Post the data to the server

When the user clicks the "Add New TextBox" button, the JavaScript function will add the new textbox dynamically. When the user submits the form, the data will be posted to the server.

To post the data to the server, you'll need to modify your controller action to accept the new textbox data. For example:

[HttpPost]
public ActionResult Index(FormCollection collection)
{
    // Get the new textbox value
    string newTextBoxValue = collection["newTextBox"];

    // Process the data
    //...

    return RedirectToAction("Index");
}

In this example, the Index action method accepts a FormCollection object, which contains the data from the form, including the new textbox value.

That's it! With these steps, you should be able to add a new textbox dynamically using JavaScript in an ASP.NET MVC application and then post the data to the server.