Working with List Item

Add List Item in an Existing PDF File

AddListItem method allows you to add an item in a ListBox field. The first argument is the field name and second argument in the field item. You can either pass a single field item or you can pass an array of string contains a list of items. This method is provided by FormEditor class. The following code snippet shows you how to add list items in a PDF file.

 // For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
 private static void AddListItem()
 {
     // The path to the documents directory
     var dataDir = RunExamples.GetDataDir_AsposePdf();

     // Create an instance of FormEditor to manipulate form fields
     using (var formEditor = new Aspose.Pdf.Facades.FormEditor())
     {
         // Bind PDF document
         formEditor.BindPdf(dataDir + "Sample-Form-01.pdf");

         // Add a ListBox field for selecting country, placed at the specified coordinates on page 1
         formEditor.AddField(Aspose.Pdf.Facades.FieldType.ListBox, "Country", 1, 232.56f, 476.75f, 352.28f,
             514.03f);

         // Add list items to the 'Country' ListBox field
         formEditor.AddListItem("Country", "USA");
         formEditor.AddListItem("Country", "Canada");
         formEditor.AddListItem("Country", "France");
         formEditor.AddListItem("Country", "Spain");

         // Save PDF document
         formEditor.Save(dataDir + "Sample-Form-01-mod.pdf");
     }
 }

Delete List Item from an Existing PDF File

DelListItem method allows you to delete a particular item from the ListBox. The first parameter is the field name while second parameter is the item which you want to delete from the list. This method is provided by FormEditor class. The following code snippet shows you how to delete a list item from the PDF file.

 // For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
 private static void DelListItem()
 {
     // The path to the documents directory
     var dataDir = RunExamples.GetDataDir_AsposePdf();

     // Create an instance of FormEditor to manipulate form fields
     using (var formEditor = new Aspose.Pdf.Facades.FormEditor())
     {
         // Bind PDF document
         formEditor.BindPdf(dataDir + "Sample-Form-04.pdf");

         // Delete the list item "France" from the 'Country' ListBox field
         formEditor.DelListItem("Country", "France");

         // Save PDF document
         formEditor.Save(dataDir + "Sample-Form-04-mod.pdf");
     }
 }