multiply-form-field-with-javascript-action-radpdfprocessing.md

title	description	type	page_title	slug	tags	res_type
Multiplying TextBoxField Values with JavaScript Actions and RadPdfProcessing	Learn how to multiply the values of two TextBoxField values using RadPdfProcessing.	how-to	How to Multiply the TextBoxField Values with JavaScript Actions and RadPdfProcessing	multiply-form-field-with-javascript-action-radpdfprocessing	pdf, multiply, value, action, js, javascript, field, textbox	kb

Environment

Version	Product	Author
Q4 2024	RadPdfProcessing	Desislava Yordanova

Description

The following example demonstrates how to create a PDF document with three [TextBoxFields]({%slug radpdfprocessing-model-annotations-widgets%}) where the third field multiplies the values in the first two widgets.

Solution

Such functionality is achieved with the [JavaScript Actions]({%slug radpdfprocessing-model-javascript-actions%}) introduced in Q4 2024 for the RadPdfProcessing library:

   RadFixedDocument document = new RadFixedDocument();
   document.Pages.AddPage();

   TextBoxField priceField = new TextBoxField("Price");
   priceField.Value = "12";
   priceField.IsReadOnly = true;
   VariableContentWidget priceWidget = priceField.Widgets.AddWidget();
   priceWidget.Rect = new Rect(new Size(150, 30));

   TextBoxField amountField = new TextBoxField("Amount");
   VariableContentWidget amountWidget = amountField.Widgets.AddWidget();
   amountWidget.Rect = new Rect(new Point(0, 50), new Size(150, 30));

   TextBoxField totalField = new TextBoxField("Total");
   totalField.IsReadOnly = true;
   totalField.Actions.Calculate = new Telerik.Windows.Documents.Fixed.Model.Actions.JavaScriptAction
       ("AFSimple_Calculate(\"PRD\", new Array (\"Amount\", \"Price\"));");
   VariableContentWidget totalWidget = totalField.Widgets.AddWidget();
   totalWidget.Rect = new Rect(new Point(0, 100), new Size(150, 30));

   document.AcroForm.FormFields.Add(priceField);
   document.AcroForm.FormFields.Add(amountField);
   document.AcroForm.FormFields.Add(totalField);
   document.Pages[0].Annotations.Add(priceWidget);
   document.Pages[0].Annotations.Add(amountWidget);
   document.Pages[0].Annotations.Add(totalWidget);

The achieved result is illustrated below:

See Also

• [Interactive Forms]({%slug radpdfprocessing-model-interactive-forms-overview%})
• [JavaScript Actions]({%slug radpdfprocessing-model-javascript-actions%})