Retrieve the file from the input field

Question

Retrieve the file from the input field

I have a requirement to retrieve an xls file and convert its content into json format. Currently, I am able to achieve this by specifying the file path directly in my code like below:

    var url = "D:/ionic/Docs/Test.xlsx";

However, I now need to allow users to select the file using an HTML input tag and then assign the selected file path to the var url. How can this be accomplished?

Home.html

<input type="file" accept="all/*" [(ngModel)]="getfile" (change)="onFileSelected($event)" id="fileInput"/>

Home.ts code:

onFileSelected()
  {
    var url = //what do I do here ;

angular typescript ionic-framework ionic2 ionic3

Answer 1

Answer №1

Due to security measures, web browsers are unable to access the File System.

Therefore, it is not recommended to spend time attempting to do so.

However, you can still retrieve file data using the following method:

HTML

<input type="file" (change)="onFileSelected($event)" accept="all/*"/>

TS

    onFileSelected(event) {

        let file = event.target.files[0];  

        let reader = new FileReader();

        reader.onload = (e: any) => {
           let fileData = e.target.result;
           console.log(fileData);
        };
       reader.readAsDataURL(file);
}

View a working example here

Answer 2

Due to security measures, web browsers are unable to access the File System.

Therefore, it is not recommended to spend time attempting to do so.

However, you can still retrieve file data using the following method:

HTML

<input type="file" (change)="onFileSelected($event)" accept="all/*"/>

TS

    onFileSelected(event) {

        let file = event.target.files[0];  

        let reader = new FileReader();

        reader.onload = (e: any) => {
           let fileData = e.target.result;
           console.log(fileData);
        };
       reader.readAsDataURL(file);
}

View a working example here

Answer 3

Answer №2

const selectedFileName: string = '' ;
onSelectFile(event){
  let chosenFile = event.target.files[0];        
  this.selectedFileName= chosenFile.name;
}

The file you select will be stored in the selectedFileName variable.

Answer 4

const selectedFileName: string = '' ;
onSelectFile(event){
  let chosenFile = event.target.files[0];        
  this.selectedFileName= chosenFile.name;
}

The file you select will be stored in the selectedFileName variable.

Retrieve the file from the input field

Answer №1

Answer №2

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