How to use two ngFor in html Angular 4?

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In my angular 4 project in response of a request from server I get two different arrays and in template I want to use both of them. the controller code is:

this.contractService.getOwnerContract()
  .subscribe(
    res => {
     this.contracts = res.contracts;
     this.users= res.users;
  })

and in html I want to use two ngFor to use contract and users properties:

<div class="col-md-12 property-list-box" *ngFor="let contct of contracts ; let usr of users">
  <div>{{contct.id}}</div>
  <div>{{usr.id}}</div>
</div>

but this html code that I wrote doesn't work. What is the best solution? Thanks for helping in advanced.

Do these two arrays always have the same number of elements? If so you can iterate over one of them, and keep track of index

<div class="col-md-12 property-list-box" *ngFor="let contract of contracts ; let i = index">
  <div>{{contracts[i].id}}</div>
  <div>{{users[i].id}}</div>
</div>

If they don't always have the same number of elements you'll need 2 ngFor directives

*ngFor - Loop two arrays in the same level, arrays angular ngfor use let obj of results[i] for this. Instead of trying to loop through two separate arrays, I would suggest creating a single array HTML <​tbody *ngIf="feedbacks.length"> <ng-container *ngFor="let item of  NgFor is a structural directive, meaning that it changes the structure of the DOM. It’s point is to repeat a given HTML template once for each value in an array, each time passing it the array value as context for string interpolation or binding. This directive is the successor of Angular 1s ng-repeat directive. Let’s take a look at an example:

You need to merge both the arrays and store in a variable and use the variable in your ngFor on the template.

Or you could a pipe to "merge" your two arrays into a single array and then you can iterate over it Here is a sample:

@Pipe({
  name: 'concat'
})
export class ConcatPipe {
  transform(arr1, arr2) {
    var arr = [];
    arr1.forEach((elt, i) => {
      arr.push({ state: elt, name: arr2[i] });
    });
  }
}

And use it this way:

<div class="col-md-12 property-list-box"*ngFor="let contract of contracts | merge:users"  >
  {{contract.id}} 
</div>

Angular ngFor, To use ngFor , let's create a component so that we can have a working HTML template: This template will generate the HTML table that we showed just above. Just like the even and odd functionality, there are also two other Angular Router - How To Build a Navigation Menu with Bootstrap 4 and  The core directive ngFor allows us to build data presentation lists and tables in our HTML templates. Let's take for example the following data: Let's take for example the following data: With ngFor we can print this data to the screen under the form of a data table, by generating HTML similar to this:

use index for next array.

<div class="col-md-12 property-list-box" *ngFor="let contct of contracts; index as i">
  <div>{{contct.id}}</div>
  <div>{{users[i].id}}</div>
</div>

See more : https://angular.io/api/common/NgForOf#local-variables

NgFor • Angular, We use the NgFor directive to loop over an array of items and create multiple elements It Duration: 6:42 Posted: Oct 6, 2016 Displaying multiple elements with ngFor. The so-called ngFor directive is a core directive, that comes with the angular framework itself. We can use this directive, if we want to display a dynamic list, for example, an array of elements on the screen.

If your both arrays have equal size then you can simple use any one of the Array and use the index for another. For example:

{{user.name}} {{ contacts[i].your_another_array_key}}

If array is not equal in size then you have to manipulate in some other fashion so it can be iterable in a single list like custom array.

Angular NgFor: Everything you need to know, Displaying multiple elements with ngFor To display that array, we need to use the ngFor directive in our components' The ngFor directive does create the HTML-Element it is placed in as many Shalini Bunga4 months. Angular [2020] - Simple Way To Use *ngfor In HTML This Page Contains information about Angular [2020] - Simple Way To Use *ngfor In HTML By angular2020 in category Angular with 0 Replies. [4809], Last Updated: Sat May 02, 2020

Displaying data in views, Angular defines a template language that expands HTML notation with syntax that allows The template displays the two component properties using double curly brace interpolation: The *ngFor directive (predefined by Angular) lets you loop through data. Because the array has four items, the message should appear. ngFor is a core Angular directive that can be used as a part if Angular template syntax to entend HTML with an easy way to itertave over lists of data right inside the component's template. You can use `ngFor lists and tables in HTML templates.

Angular 9/8 ngFor Directive: Render Arrays with ngFor by Example , Check out How to repeat an HTML element or component multiple times in Angular You can use `ngFor lists and tables in HTML templates. If we use the normal *ngFor directive without using the trackBy function, the Angular application will remove all the DOM elements and will recreate them again in the DOM tree, even if the same

ngFor with Angular 2 and TypeScript, In the code snippet below we use the ngFor directive to iterate over the people array and store each item in a template variable called person . This variable is  In the above code snippet, we are iterating users array using NgFor. In angular 1.x, we iterate using ng-repeat. In angular 2 NgFor is the replacement of it. NgFor with component element is used as follows. In the above code snippet, component property binding is taking place for each element in iteration.