With the above changes in place, let's modify the Add view to display the error messages if they occur: Let's see what happens when we attempt to submit an invalid POST that is missing the email address.
When we get to the POST action while debugging, we have the following values in our Model State Dictionary: Note that the Model State instance for the email address now has an error in the Errors collection.
The Save Data() action does the job of reading the uploaded file, instantiating a model object, setting model properties and then displaying Upload Result view with a success or error message.
Now the error will be displayed on the page: The Model State represents the submitted values and errors in said values during a POST.The validation process respects the attributes like Required and Email Address, and we can add custom errors to the validation if we so desire.In simple scenarios, this is all we need, and all of it is happening behind the scenes!But what if we needed to perform more complex validation than what is provided by attributes?The Read() method reads the content in a byte array.
This byte array is converted into a string using Get String() method of the ASCIIEncoding class.
Validation Summary and Validation Message For read directly from Model State to display errors to the user. NET MVC 5, specifically Chapter 6, which details validation methods using the Model State.
I've also got a very simple sample project on Github that demonstrates how the Model State works and provides all the code and markup in this post.
Below are listed the steps for you to follow when using the Kendo UI Validator with the Editable widgets, such as the Kendo UI Grid and List View, initialize the Validator internally so that to specify custom rules, you should extend the Kendo UI Validator built-in validation rules.
You can also use this approach to define rules after the Kendo UI scripts are included and to use them in all views. Step 2 Include them in the view in which you want to validate the user input or in the layout.
This article describes how to use client-side validation with Telerik UI for ASP. It also provides hints on how to use the Kendo UI Validator and the MVC default j Query validation.