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Combobox SelectedIndex is not working
http://forum.pdfsharp.com/viewtopic.php?f=2&t=3517
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Author:  sagar.jumble [ Tue Dec 20, 2016 7:19 am ]
Post subject:  Combobox SelectedIndex is not working

I am trying to edit the a PDF But This has China as default value and when I try to set the selected index and save the file China is shown as value,
Also for a file if it doesn't have any default value it always shows empty value.
Below is my code


PdfDocument pd = PdfReader.Open(sourceFilePath, PdfDocumentOpenMode.Modify);

var pdfFields = pd.AcroForm.Fields;

((PdfComboBoxField)pdfFields[i]).SelectedIndex = 0;
//i is index generated when we iterate pdfFields.

Can anyone please try to edit some PDF using PDF sharp in Code and let me know what am I dping wrong.
I have generated editable PDF from http://www.pdfescape.com

Author:  vice [ Tue Oct 13, 2020 5:00 pm ]
Post subject:  Re: Combobox SelectedIndex is not working

Had the same issue, this ultimately worked for me:

Code:
var comboBox = field as PdfComboBoxField;
PdfArray indexElement = (PdfArray)comboBox.Elements["/I"];
indexElement.Elements[0] = new PdfInteger(4);
comboBox.Value = new PdfString("Five");


This will set the value properly for display in Acrobat itself. For some reason, just setting Value normally would work but only in less exacting viewers like Chrome or Edge.

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