Change Boolean values to text in angular 2 client side

I would suggest a pipe that returns either active or blocked according to the boolean.

import {Pipe, PipeTransform} from '@angular/core';

@Pipe({name: 'activeBlocked'})
export class ActiveBlockedPipe implements PipeTransform {
    transform(value) {
        return value ? 'Active' : 'Blocked';
    }
}

Then you can use it like this in you components template:

{{value | activeBlocked}}

In my opinion this is the easiest to reuse.

How can I able to achieve this in angular 2

Just use javascript/typescript:

const valueFromServer = false; // Assuming
const toShow = valueFromServer ? 'Active' : 'Blocked';

You could do it directly in the view:

<td>{{user.IsActive && 'Active' || 'Block'}}</td>