SetFormFieldCheckBoxStyle(Int32,PdfCheckBoxStyle) Method

In This Topic

Sets the graphical style of a checkmark used to represent the checked state of a required form field, hereabout a check box or a radio button group. The form field is specified by its unique form field's identifier and it is related to the currently loaded PDF document. As said, this method is only applicable to check boxes and radio buttons.

The checkmark is a shape, that appears in the corresponding form field, here a check box or a radio button group, when it is checked/selected. This method doesn't alter the form field's visual appearance in any way.

Syntax

Visual Basic
C#
Delphi
JScript
Managed Extensions for C++
C++/CLI

'Declaration
 
Public Overloads Function SetFormFieldCheckBoxStyle( _
   ByVal FieldId As Integer, _
   ByVal CheckStyle As PdfCheckBoxStyle _
) As GdPictureStatus

public GdPictureStatus SetFormFieldCheckBoxStyle( 
   int FieldId,
   PdfCheckBoxStyle CheckStyle
)

public function SetFormFieldCheckBoxStyle( 
    FieldId: Integer;
    CheckStyle: PdfCheckBoxStyle
): GdPictureStatus;

public function SetFormFieldCheckBoxStyle( 
   FieldId : int,
   CheckStyle : PdfCheckBoxStyle
) : GdPictureStatus;

public: GdPictureStatus SetFormFieldCheckBoxStyle( 
   int FieldId,
   PdfCheckBoxStyle CheckStyle
)

public:
GdPictureStatus SetFormFieldCheckBoxStyle( 
   int FieldId,
   PdfCheckBoxStyle CheckStyle
)

Parameters

FieldId: A unique form field identifier specifying a required form field object. You can obtain this identifier using methods like GetFormFieldId, GetFormFieldChildID or methods intended to add form fields.
CheckStyle: A member of the PdfCheckBoxStyle enumeration. A graphical style of a checkmark to be used when checking/selecting the required form field.

Return Value

A member of the GdPictureStatus enumeration. If the method has been successfully followed, then the return value is GdPictureStatus.OK.

We strongly recommend always checking this status first.

Remarks

This method is only allowed for use with non-encrypted documents.

Just to remind you that this method is only meaningful for check boxes and radio buttons, otherwise it will fail.

Example

How to change the circle checkmark to the cross checkmark for all check boxes in the current document.

VB.NET
C#

Dim caption As String = "Example: SetFormFieldCheckBoxStyle"
Dim gdpicturePDF As GdPicturePDF = New GdPicturePDF()
If gdpicturePDF.LoadFromFile("forms.pdf", False) = GdPictureStatus.OK Then
    Dim count As Integer = gdpicturePDF.GetFormFieldsCount()
    If gdpicturePDF.GetStat() = GdPictureStatus.OK Then
        Dim formID As Integer = 0
        Dim type As PdfFormFieldType = PdfFormFieldType.PdfFormFieldTypeUnknown
        Dim style As PdfCheckBoxStyle = PdfCheckBoxStyle.PdfCheckBoxStyleCheck
        For i As Integer = 0 To count - 1
            formID = gdpicturePDF.GetFormFieldId(i)
            If gdpicturePDF.GetStat() = GdPictureStatus.OK Then
                type = gdpicturePDF.GetFormFieldType(formID)
                If gdpicturePDF.GetStat() = GdPictureStatus.OK Then
                    If type = PdfFormFieldType.PdfFormFieldTypeCheckBoxButton Then
                        style = gdpicturePDF.GetFormFieldCheckBoxStyle(formID)
                        If gdpicturePDF.GetStat() = GdPictureStatus.OK Then
                            If style = PdfCheckBoxStyle.PdfCheckBoxStyleCircle Then
                                If gdpicturePDF.SetFormFieldCheckBoxStyle(formID, PdfCheckBoxStyle.PdfCheckBoxStyleCross) <> GdPictureStatus.OK Then
                                    MessageBox.Show("The SetFormFieldCheckBoxStyle() method has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption)
                                    Exit For
                                End If
                            End If
                        Else
                            MessageBox.Show("The GetFormFieldCheckBoxStyle() method has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption)
                            Exit For
                        End If
                    End If
                Else
                    MessageBox.Show("The GetFormFieldType() method has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption)
                    Exit For
                End If
            Else
                MessageBox.Show("The GetFormFieldId() method has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption)
                Exit For
            End If
        Next
        If count = 0 Then
            MessageBox.Show("This file doesn't include forms.", caption)
        Else
            If gdpicturePDF.GetStat() = GdPictureStatus.OK Then
                If gdpicturePDF.SaveToFile("forms_updated.pdf") = GdPictureStatus.OK Then
                    MessageBox.Show("The example has been followed successfully and the file has been saved.", caption)
                Else
                    MessageBox.Show("The example has been followed successfully, but the file can't be saved. Status: " + gdpicturePDF.GetStat().ToString(), caption)
                End If
            End If
        End If
    Else
        MessageBox.Show("The GetFormFieldsCount() method has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption)
    End If
Else
    MessageBox.Show("The file can't be loaded.", caption)
End If
gdpicturePDF.Dispose()

string caption = "Example: SetFormFieldCheckBoxStyle";
GdPicturePDF gdpicturePDF = new GdPicturePDF();
if (gdpicturePDF.LoadFromFile("forms.pdf", false) == GdPictureStatus.OK)
{
    int count = gdpicturePDF.GetFormFieldsCount();
    if (gdpicturePDF.GetStat() == GdPictureStatus.OK)
    {
        int formID = 0;
        PdfFormFieldType type = PdfFormFieldType.PdfFormFieldTypeUnknown;
        PdfCheckBoxStyle style = PdfCheckBoxStyle.PdfCheckBoxStyleCheck;
        for (int i = 0; i < count; i++)
        {
            formID = gdpicturePDF.GetFormFieldId(i);
            if (gdpicturePDF.GetStat() == GdPictureStatus.OK)
            {
                type = gdpicturePDF.GetFormFieldType(formID);
                if (gdpicturePDF.GetStat() == GdPictureStatus.OK)
                {
                    if (type == PdfFormFieldType.PdfFormFieldTypeCheckBoxButton)
                    {
                        style = gdpicturePDF.GetFormFieldCheckBoxStyle(formID);
                        if (gdpicturePDF.GetStat() == GdPictureStatus.OK)
                        {
                            if (style == PdfCheckBoxStyle.PdfCheckBoxStyleCircle)
                            {
                                if (gdpicturePDF.SetFormFieldCheckBoxStyle(formID, PdfCheckBoxStyle.PdfCheckBoxStyleCross) != GdPictureStatus.OK)
                                {
                                    MessageBox.Show("The SetFormFieldCheckBoxStyle() method has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption);
                                    break;
                                }
                            }
                        }
                        else
                        {
                            MessageBox.Show("The GetFormFieldCheckBoxStyle() method has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption);
                            break;
                        }
                    }
                }
                else
                {
                    MessageBox.Show("The GetFormFieldType() method has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption);
                    break;
                }
            }
            else
            {
                MessageBox.Show("The GetFormFieldId() method has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption);
                break;
            }
        }
        if (count == 0)
            MessageBox.Show("This file doesn't include forms.", caption);
        else
        {
            if (gdpicturePDF.GetStat() == GdPictureStatus.OK)
            {
                if (gdpicturePDF.SaveToFile("forms_updated.pdf") == GdPictureStatus.OK)
                    MessageBox.Show("The example has been followed successfully and the file has been saved.", caption);
                else
                    MessageBox.Show("The example has been followed successfully, but the file can't be saved. Status: " + gdpicturePDF.GetStat().ToString(), caption);
            }
        }
    }
    else
        MessageBox.Show("The GetFormFieldsCount() method has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption);
}
else
    MessageBox.Show("The file can't be loaded.", caption);
gdpicturePDF.Dispose();

Reference

GdPicturePDF Class
GdPicturePDF Members
Overload List
GetFormFieldCheckBoxStyle(Int32) Method
GetFormFieldsCount Method
GetFormFieldId Method
GetFormFieldChildID Method
GetFormFieldType Method
AddCheckBoxFormField(Single,Single,Single,Single,String,PdfCheckBoxStyle,Boolean,Color) Method
AddRadioButtonFormField(Single,Single,Single,Single,String,String,PdfCheckBoxStyle,Color) Method