In one project function for create pdf and download not work in another place. Why?

Ionic Framework ionic-v3
1

Dear Friends,

in one of my sample code the function works for creation and download of PDF as follows

createPdf(epayTransID,status,ReceiptDate,TaxPeriod,TotAmount,BankRefNo) {

   var docDefinition = {
     content: [
       { text: 'Payment Receipt', style: 'header' },
       { text: new Date().toTimeString(), alignment: 'right' },

       { text: 'Transaction ID', style: 'subheader' },
       { text: epayTransID },

       { text: 'Status', style: 'subheader' },
       { text: status },


       { text: 'Receipt Date', style: 'subheader'},
       { text: ReceiptDate },

       { text: 'Tax Period', style: 'subheader'},
       { text: TaxPeriod },

       { text: 'Total Amount', style: 'subheader'},
       { text: TotAmount},

       { text: 'Bank Reference no', style: 'subheader'},
       { text: BankRefNo},
       
     ],
     styles: {
       header: {
         fontSize: 18,
         bold: true,
       },
       subheader: {
         fontSize: 14,
         bold: true,
         margin: [0, 15, 0, 0]
       },
       story: {
         italic: true,
         alignment: 'center',
         width: '50%',
       }
     }
   }
   this.pdfObj = pdfMake.createPdf(docDefinition).getBlob(buffer => {
   console.log("step 1 : " + this.file.externalRootDirectory);    
this.file.resolveDirectoryUrl(this.file.externalRootDirectory)
      .then(dirEntry => {
       console.log("step 2 : " + dirEntry);  
        this.file.getFile(dirEntry, 'paymentreceipt.pdf', { create: true })
          .then(fileEntry => {
           console.log("step 3 : " + fileEntry);  
            fileEntry.createWriter(writer => {
              writer.onwrite = () => {
                console.log("step 4 : " + fileEntry.toURL());
                this.fileOpener.open(fileEntry.toURL(), 'application/pdf')
                  .then(res => {
                   console.log("step 5 :  completed : " + res);
                   })
                  .catch(err => {
                  console.log("step 6 : error : " + err);
                   });
              }
              writer.write(buffer);
               console.log("step 7 : writing : " + buffer);
            })
          })
          .catch(err => {
            const alert = this.alertCtrl.create({ message: err, buttons: ['Ok'] });
            alert.present();
          });
      })
      .catch(err => {
        const alert = this.alertCtrl.create({ message: err, buttons: ['Ok'] });
        alert.present();
      });

  });
 }

the Console result is shown as in chromium

step 1 : file:///storage/emulated/0/

step 2 : {"isFile":false,"isDirectory":true,"name":"","fullPath":"/","filesystem":"<FileSystem: sdcard>","nativeURL":"file:///storage/emulated/0/"}

step 3 : {"isFile":true,"isDirectory":false,"name":"paymentreceipt.pdf","fullPath":"/paymentreceipt.pdf","filesystem":"<FileSystem: sdcard>","nativeURL":"file:///storage/emulated/0/paymentreceipt.pdf"}

step 7 : writing : {}

In working code the console output is

step 1 : file:///storage/emulated/0/
step 2 : {"isFile":false,"isDirectory":true,"name":"","fullPath":"/","filesystem":"<FileSystem: sdcard>","nativeURL":"file:///storage/emulated/0/"}

step 3 : {"isFile":true,"isDirectory":false,"name":"paymentreceipt.pdf","fullPath":"/paymentreceipt.pdf","filesystem":"<FileSystem: sdcard>","nativeURL":"file:///storage/emulated/0/paymentreceipt.pdf"}
step 7 : writing : {}
step 4 : file:///storage/emulated/0/paymentreceipt.pdf
step 5 :  completed : "OK"

Here the Step 4 and Step 5 not working (in first case)

But in another project place it will not work without any error and open a functional PDF…
please any body help … I am looking this for 3 days :d

Thanks

Anes

2

what type of project created “super” or “blank” ?

3

Sorry I used already existing code . So don’t know the project is ‘super’ or ‘blank’

5

I can see my problem is no “paymentreceipt.pdf” file generated at all . It’s working on another demo project in my phone itself

Pls advise