Write to form fields in PDF

[Boris Oprit]

I am trying to write to a formfield in an exisiting PDF

Added a folder to the Solution with the name Document and in the folder the pdf with the name Boord.pdf

Want to write to a formfield and open the pdf

When starting the debug nothing is happening when i make some text in Entry and push the button , no error nothing.

What am i missing . Think the problem is place of the document maybe ?

 BackgroundColor="LightGray">

    <ContentPage.Content>

        <AbsoluteLayout>

            <button:SfButton x:Name="Bekijken" Text="PDF"  AbsoluteLayout.LayoutBounds=".90,.49,.30,.08" AbsoluteLayout.LayoutFlags="All" FontSize="Medium" TextColor="White" BackgroundColor="Gray" BackgroundImage="Assortiment" HorizontalTextAlignment="Center" Clicked="OnBekijkenButtonClicked"  />

            <Entry x:Name="Plaats"

                   AbsoluteLayout.LayoutBounds=".100,.49,.35,.08" AbsoluteLayout.LayoutFlags="All"

    Placeholder="" />

         

        </AbsoluteLayout>

    </ContentPage.Content>

</ContentPage>

  void OnBekijkenButtonClicked(object sender, EventArgs args)

        {

            Stream docStream = typeof(App).GetTypeInfo().Assembly.GetManifestResourceStream("Document.Boord.pdf");

            PdfLoadedDocument loadedDocument = new PdfLoadedDocument(docStream);

            //Loads the form

            PdfLoadedForm form = loadedDocument.Form;

            //Fills the textbox field by using index

            

            (form.Fields["f1_01(0)"] as PdfLoadedTextBoxField).Text = Plaats.Text;

           

            //Save the PDF document to stream.

            MemoryStream stream = new MemoryStream();

            loadedDocument.Save(stream);

            //Close the document.

            loadedDocument.Close(false);

        }

[Sowmiya Loganathan]

Hi Boris, 

Thank you for contacting Syncfusion support.  

We have create the sample to fill form fields in an existing PDF document in Xamarin Forms platform. Please find the downloaded link from below, 

Sample link: https://www.syncfusion.com/downloads/support/forum/149508/ze/GettingStarted-571694046  

Please try the above sample in your end and let us know if you need any further assistance on this.  

Regards, 

Sowmiya Loganathan 

[Boris Oprit]

Thanks for the reply and sample .

But it is not working correct , on the pdf is the word Name and a Formfield.

When printing it is only showing the word Name and nothing else , no text in Fromfield.

[Boris Oprit]

Well , 

Seams to work but only in Android and not in the IOS simulator.

Don't know why

[Boris Oprit]

Jep is working now .

Found this here on the forum , added and works

            loadedDocument.Form.Flatten = true;

            //Flattens the first field //form.Fields[0].Flatten = true;

            //Add the form field to the document

            loadedDocument.Form.Fields.Add(loadedTextBoxField);

[Boris Oprit]

Other question,

Why can't i use another pdf ?

When i change the pdf with form fields it is giving an error when i want to write to it.

The pdf is named Boord 

The error is

System.ArgumentNullException

  Message=Value cannot be null.

Parameter name: file

and the button click

  void OnButtonClicked(object sender, EventArgs args)

        {

            //Load PDF 

            Stream docStream = typeof(App).GetTypeInfo().Assembly.GetManifestResourceStream("GettingStarted.Assets.Boord.pdf");

            PdfLoadedDocument loadedDocument = new PdfLoadedDocument(docStream);

            //Get the loaded form

            PdfLoadedForm loadedForm = loadedDocument.Form;

            //Get the loaded text box field and fill it

            PdfLoadedTextBoxField loadedTextBoxField = loadedForm.Fields[0] as PdfLoadedTextBoxField;

            loadedTextBoxField.Text = "First Name";

            loadedDocument.Form.Flatten = true;

            //Flattens the first field //form.Fields[0].Flatten = true;

            //Add the form field to the document

            loadedDocument.Form.Fields.Add(loadedTextBoxField);

            //Save the document to the stream

            MemoryStream stream = new MemoryStream();

            loadedDocument.Save(stream);

            //Close the document

            loadedDocument.Close(true);

            //Save the stream as a file in the device and invoke it for viewing

            Xamarin.Forms.DependencyService.Get<ISave>().SaveAndView("Output.pdf", "application/pdf", stream);

        }

[Sowmiya Loganathan]

Hi Boris, 

 

Why can't i use another pdf ?    When i change the pdf with form fields it is giving an error when i want to write to it.    The pdf is named Boord     The error is    System.ArgumentNullException    Message=Value cannot be null.  Parameter name: file

We suspect that the issue occurs due to loading of PDF in incorrect format. While loading the PDF as stream, it should be in Assets folder and be set as “Embedded Resources”.     Please try the below solution to overcome this issue.     Right click on the PDF file in Assets folder > Properties > Set Embedded Resources for Build Action.         Please try the above solution in your end and let us know the result.

 

Regards, 

Sowmiya Loganathan 

[Boris Oprit]

Thanks ,

Is working now .

[Boris Oprit]

Hello ,

It is working and showing the document , but i have an error when the Entry name Plaats is empty.

System.ArgumentNullException

  Message=Value cannot be null.

Parameter name: text

How do i change it so it can be empty

 void OnBekijkenButtonClicked(object sender, EventArgs args)

        {

            Stream docStream = typeof(App).GetTypeInfo().Assembly.GetManifestResourceStream("Document.Boord.pdf");

            PdfLoadedDocument loadedDocument = new PdfLoadedDocument(docStream);

            //Loads the form

            PdfLoadedForm form = loadedDocument.Form;

            //Fills the textbox field by using index

            

            (form.Fields["f1_01(0)"] as PdfLoadedTextBoxField).Text = Plaats.Text;

           

            //Save the PDF document to stream.

            MemoryStream stream = new MemoryStream();

            loadedDocument.Save(stream);

            //Close the document.

            loadedDocument.Close(false);

        }

[Sowmiya Loganathan]

Hi Boris, 

We have analyzed your requirement. If you want to fill the form fields in PDF document without entering the text in Entry (name - Plaats), kindly use the below code snippet in XAML page to overcome the reported issue “Argument null exception”.   

Code snippet (MainPage.xaml):  

 

<AbsoluteLayout> 

     

    <Button x:Name="Bekijken" Text="Generate Document" Clicked="OnButtonClicked" VerticalOptions="Center" HorizontalOptions="Center"/> 

     

    <Entry x:Name="Plaats" AbsoluteLayout.LayoutBounds=".100,.49,.35,.08" AbsoluteLayout.LayoutFlags="All" Placeholder="" Text=""/> 

 

</AbsoluteLayout> 

Please try the above solution in your end and let us know the result.  

Regards, 

Sowmiya Loganathan