Understanding Validation In MVC - Part 1

Types of Validation:

1. Client Side Validation: Performed at client side no post back.
2. Server side Validation: Performed at server side post back.

Now let’s see Client side Validation:

1. Specify Required Field Validation: It is commonly used validation. When we want to specify particular field is compulsory in UI we can use this validation. Simply we need to just apply [Required] attribute to the Property. We can give custom error message. The following image show how to use it.
   
   
   
   
2. Specify Range Validation: When field value is between particular range we can use range validation and can be used in the following way.
   
   
   
3. Specify Max length: When user want max length of property, it should be between specified limit and we can specify length to the String as in the following,
   
   
   
   
4. Specify compare Validation: We can compare two properties using this validation. Just need to specify which property must be matched using the following way,
   
   
   
   
5. Specify Regular expression for validation: We can specify regular expression for validation in the following way,
   
   
   
   
6. Custom Validation: We will see this in next validation article.

Let’s see how to implement validation in your project

Now to implement validation in your project you have to follow these steps:

Step 1: Enable client side validation in web config through the following way. It is true by default.



Step 2: Include scripts files in the page. Do not change sequence.