Mvc3 self validating models

Step 8 − Now open the Turn Windows Feature on or off and Expand Internet Information Services → World Wide Web Services → Application Development Features.Step 9 − Check the checkboxes as shown in the above screenshot and click Ok.Let’s take a look at a simple example of self-hosting. NET MVC application is completed and you want to use selfhosting, right-click on the Project in the solution explorer. Step 2 − Click the ‘Custom’ option, which will display the New Custom Profile dialog. Step 4 − Select the File System from the Publish method dropdown list and also specify the target location. Step 7 − Click ‘Publish’ button, it will publish the files at the desired location. Step 6 − Check the ‘Delete all existing files prior to publish’ and ‘Precompile during publishing’ checkboxes and click ‘Next’ to continue.You will see all the files and folders in the target location on your system.It will have all the files required to get deployed on the localhost.This week’s MSDN Flash feature article is all about enhancing the validation support in ASP.

If any errors are found, they are added to the Errors collection in the property's Model State. That's because an error exists; Is Valid is false if any of the properties submitted have any error messages attached to them.

One of the main issues is that validation can only be done on a model property in isolation.

Often we will want to validate a property based on the current value of some other property: for instance we may want our confirm password field value to be the same as the password box.

Ever wondered just what the Model State was that keeps popping up in your ASP. Model State is a property of a Controller, and can be accessed from those classes that inherit from System. Despite its name, it doesn't actually know anything about any model classes, it only has names, values, and errors. First, we have the Add User VM view model: tags are submitted to the server as key-value pairs. MVC creates all of these instances automatically for us when we submit a POST with data, and the POST action has inputs that map to the submitted values.

Let's break down what the Model State is and why we use it. It also contains a collection of error messages for each value submitted. Here's what those values look like, from the same debugger session: Each of the properties has an instance of Value Provider Result that contains the actual values submitted to the server.

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