NazemMahmud

#include<cstdio>
#include<cstdlib>
#include<cmath>
#include<algorithm>
#include<iostream>
#include<string>
#include<cstring>
#define nl printf("\n")
#define sl strlen
#define f0(i,a) for(__typeof(a)i=0;i<a;i++)

NazemMahmud

#include<cstdio>
#include<cstdlib>
#include<cmath>
#include<algorithm>
#include<iostream>
#include<string>
#include<cstring>
#define LLI long long int
#define LL long long
#define pf printf

NazemMahmud

#include<cstdio>
#include<sstream>
#include<cstdlib>
#include<cmath>
#include<algorithm>
#include<iostream>
#include<string>
#include<vector>
#include<cstring>
using namespace std;

NazemMahmud

#include<cstdio>
#include<sstream>
#include<cstdlib>
#include<cmath>
#include<algorithm>
#include<iostream>
#include<string>
#include<vector>
#include<cstring>
#define LLI long long int

NazemMahmud

#include<cstdio>
#include<sstream>
#include<cstdlib>
#include<cmath>
#include<algorithm>
#include<iostream>
#include<string>
#include<cstring>
#define LLI long long int
#define LL long long

NazemMahmud

#include<cstdio>
#include<sstream>
#include<cstdlib>
#include<cmath>
#include<algorithm>
#include<iostream>
#include<string>
#include<vector>
#include<cstring>
#include<map>

NazemMahmud

#include<cstdio>
#include<sstream>
#include<cstdlib>
#include<cmath>
#include<algorithm>
#include<iostream>
#include<string>
#include<vector>
#include<cstring>
#include<map>

NazemMahmud

<form class="form-group" [formGroup]="formGroup">
        <div mat-dialog-content>
            <!--  Name    -->
            <mat-form-field>
                <input matInput formControlName="first_name" placeholder="Name…" >
                <mat-error *ngIf="!formGroup.controls.first_name.invalid">
                    Filed is required...
                </mat-error>
            </mat-form-field>

NazemMahmud

import {Component, OnInit} from '@angular/core';
import {FormBuilder, FormGroup, Validators} from '@angular/forms';
import {Subject} from 'rxjs';
import {takeUntil} from 'rxjs/operators';

// your extra code if you needed…

export class FileUploadComponent implements OnInit, OnDestroy {
    formGroup: FormGroup;
    disabled = true;

NazemMahmud

import {CommonModule} from '@angular/common';
import {NgModule} from '@angular/core';

import {DataService} from '../../shared/services/data.service';
import {FileUploadService} from './services/file-upload.service';

import {FlexModule} from '@angular/flex-layout';
import {RouterModule} from "@angular/router";
import {
    MatFormFieldModule, MatIconModule, MatInputModule, MatSnackBarModule,