Here Mudassar Ahmed Khan has explained with an example, how to use ModelState.IsValid property in ASP.Net MVC Razor.

ModelState.IsValid property is an inbuilt property of ASP.Net MVC which verifies two things:
1. Whether the Form values are bound to the Model.
2. All the validations specified inside Model class using Data annotations have been passed.

ModelState.IsValid property can be used to perform some logical operations based on the values submitted by the User.

Here Mudassar Ahmed Khan has explained with an example, how to use ModelState in View for accessing the ModelState.IsValid property in ASP.Net MVC Razor.

The ModelState can be accessed in View using the ViewData object in ASP.Net MVC Razor

Here Mudassar Ahmed Khan has explained with an example, how to implement Server Side TextBox Validation using Model in ASP.Net MVC Razor.

The Server Side validations will be performed using Model class and Data Annotation attributes in ASP.Net MVC Razor.

Here Mudassar Ahmed Khan has explained with an example, how to perform Validation inside Controller i.e. Server Side validation in ASP.Net MVC Razor.

Validations in ASP.Net MVC Razor can be performed on Client Side as well as Server Side using Data Annotation attributes.