How to: Create a Checkbox Form Field in Rich Text Editor for WPF

• Dec 04, 2023
• 2 minutes to read

The RichEditControl allows you to view and export a document containing checkbox form fields. These form fields are interactive, so end-users can toggle their state as needed. The resulting document can be exported to PDF or HTML format.

Important

RichEditControl does not support using checkboxes in OpenDocument Text (.odt) and HTML documents.

Checkboxes in API

Use members from the table below to manage checkboxes in code.

API	Description
FormFieldCollection.InsertCheckBox	Inserts a checkbox form field to a given document position and adds the created CheckBox object to the FormFieldCollection. Note that you can only insert checkboxes in the main document body. An FormFieldIncorrectSubDocumentException occurs on attempt to insert the checkbox into a comment, header, footer or text box.
FormField.Name	Specifies a bookmark name associated with the checkbox.
CheckBox.State	Gets or sets the checkbox’s state.
CheckBox.SizeMode	Defines the checkbox’s size mode. Use the CheckBox.Size property to specify the exact size.
FormField.HelpTextType FormField.StatusTextType	Specifies the type of instructional text that accompanies the checkbox.
FormField.HelpText FormField.StatusText	Gets or sets the checkbox’s instructional text. With the …TextType property set to FormFieldTextType.Auto, make sure that the …Text property value is equal to one of the document’s AutoText gallery entries.

View Example

FormFieldsActions.cs

using DevExpress.XtraRichEdit.API.Native;
//...

DocumentPosition currentPosition = document.CaretPosition;
CheckBox checkBox = document.FormFields.InsertCheckBox(currentPosition);
checkBox.Name = "check1";
checkBox.State = CheckBoxState.Checked;
checkBox.SizeMode = CheckBoxSizeMode.Auto;
checkBox.HelpTextType = FormFieldTextType.Custom;
checkBox.HelpText = "help text";

FormFieldsActions.vb

Imports DevExpress.XtraRichEdit.API.Native
'...

Dim currentPosition As DocumentPosition = document.CaretPosition
Dim checkBox As CheckBox = document.FormFields.InsertCheckBox(currentPosition)
checkBox.Name = "check1"
checkBox.State = CheckBoxState.Checked
checkBox.SizeMode = CheckBoxSizeMode.Auto
checkBox.HelpTextType = FormFieldTextType.Custom
checkBox.HelpText = "help text"

Checkboxes in the User Interface

End-users can change the checkbox’s state by double-clicking the object. The state defined by an end-user is passed to the CheckBox.DefaultState property.

Note

RichEditControl has the following limitations when working with checkboxes in the UI:

• It does not provide user interface elements to manage checkboxes.
• It cannot display instructional text provided for the checkbox.
• It does not support macros assigned with the checkbox.