Here Mudassar Ahmed Khan has explained with an example, how to display message from Controller in View using JavaScript Alert MessageBox in ASP.Net MVC Core.

The message sent from Controller to View will be displayed in JavaScript Alert MessageBox using ViewBag object in ASP.Net MVC Core.

Here Mudassar Ahmed Khan has explained with an example, how to convert (export) JSON string as PDF using JavaScript.

The JSON string will be converted into a JSON object. The data from the JSON object will be used to populate an HTML Table and later the HTML Table will be downloaded (exported) as PDF file using the pdfmake plugin in JavaScript.

Here Mudassar Ahmed Khan has explained with an example, how to use ViewState variable inside JavaScript in ASP.Net with C# and VB.Net.

ViewState is a Server Side class object which though stores the data on Client Side but it is in Encrypted Form (Hashed format) and hence cannot be read by Plain JavaScript.

Thus the ViewState variable is accessed inside JavaScript code with the help of Server Side Code Blocks in ASP.Net with C# and VB.Net.

Here Mudassar Ahmed Khan has explained with an example, how to use Page_ClientValidate function with JavaScript in ASP.Net.

Page_ClientValidate is an ASP.Net JavaScript function in-built which is used to perform ASP.Net validation explicitly i.e. invoking the ASP.Net Validators using JavaScript.

For example, in order to make the RequiredFieldValidator work with OnClientClick we need to make use of Page_ClientValidate JavaScript function in ASP.Net.