The view can interact with the model through a feature called model binding. So for example, you have a view that will post back to a controller. If the view is tied to a model then the MVC Framework will loop through all of the form elements and match them up with the properties in the Model, and then pass the filled model over to the controller. I would recommend going through a few tutorials over at www.asp.net[^] so you get a better understanding from a hands on approach.

Your sample code has a perfect example. So as it is now you have a form like so

@model MyProject.Models.Product

@using (Html.BeginForm())
{

    @Html.LabelFor(m => p.Name, "Name:")
    @Html.TextBoxFor(m => p.Name)


<input type="submit" value="Create" />

}

Just by looking at this code I don't really know where the form is going to be posted to. Also your standard HTML controls are created using specific C# HTML Helpers, which can make the html a little confusing for some. Now taking a look at the code that uses Tag Helpers, the HTML is much more readable.

@model MyProject.Models.Product
@addtaghelper "Microsoft.AspNet.Mvc.TagHelpers"

<form asp-controller="Products" asp-action="Create" method="post">

    <label asp-for="Name">Name:</label>
    <input asp-for="Name" />



<input type="submit" value="Save" />

</form>

I know exactly where this form is going to post back to. And I also know where my HTML elements are and where my C# code is. For me, it makes the view a whole lot easier to read and understand.

You can use User.Identity.Name

This will help you learn about sending emails in asp.net http://asp.net-tutorials.com/misc/sending-mails/[^]

Posting your code would help. Have you walked through it to make sure the code is following the proper path?

If you have CausesValidation set to True and you are not getting a postback, then it's possible that your validation controls are firing and not being displayed. If you have validation controls set up make sure they are displayed properly to a ValidationSummary control. You could also set your CausesValidation property to False to by pass the validation and make sure it's hitting the server.

I'm not sure what your question exactly is.

if(this._Item==null)

This statement checks to see if the list has anything in it. If it doesn't then it will create a new list so you can store Cart objects in it

You have to fill the DataSet before you read from it.

adapter.Fill(ds6, "Teacher");

For your first question, you can use the onselectedindexchanged event. For your second question, if you are storing the option values in a database, you can pull the results based on the person Id and databind it to the drop down list.

Have you tried to set a break point and step through the code? In order to help you with this, we would need to see the code that is generating the error and what you were attempting to do when you received it.

You can use flash for this, and I also believe HTML 5 can handle a lot of this too. I would recommend searching first before asking for the complete source code.

I'm sure the OP is asking if a database would be a good way to store the news articles, pictures, etc.

Instead of trying to call the JavaScript function after you get the server results, you should be using AJAX to take care of everything.

I don't think you need the btnIntroductionText_Click event since the Popup Extender is already taking care of it when you set the TargetControlID.

I beleive the Validation Summary fires when a post back is attempted. Here[^] is an article that might help. To get around the page alignment issue, I put an asterisk in the RequiredField Validator text property. That way when the onblur even fires, you will have a little red star appear, which shouldn't affect your layout too much.

You will want to use Forms authentication. Here[^] is a good starting point

I agree that the OP might be able to impliment this to work with their application, but my point is still valid. As the article states "While you might like to just combine Forms and Windows authentication, its not that easy. Each ASP.NET application can only have one authentication type, so you need to pick just one."

You can choose to run this on client side, but you will always want to do it again on client side as well, just in case the user disables JavaScript or messes with the HTML of the page. There is a regular expression that you can use to validate that the credit card number is in a "valid format" and as far as the month and year, your best bet would probably use drop down boxes to restrict their input choices.

You cannot mix the two authentication methods. You can only use one authentication method per site, so you have to pick either Forms or Windows. The only thing you can do with a sub folder is change the authorization, which is something separate.

Do you mean you want authorize users that are listed in your database to access your project folders?