A unique form field identifier specifying a required form field object. You can obtain this identifier using methods like GdPicturePDF.GetFormFieldId, GdPicturePDF.GetFormFieldChildID or methods intended to add form fields.
Example





In This Topic
GdPicture14 Namespace / GdPicturePDF Class / GetFormFieldRotation Method

GetFormFieldRotation Method (GdPicturePDF)

In This Topic
Returns the counterclockwise rotation, in degrees, of a specified form field, relative to the page, where the form field is located. The required form field is specified by its unique form field's identifier and it is related to the currently loaded PDF document. The resulting value is always a multiple of 90.
Syntax
'Declaration

 

Public Function GetFormFieldRotation( _

   ByVal FieldId As Integer _

) As Integer
public int GetFormFieldRotation( 

   int FieldId

)
public function GetFormFieldRotation( 

    FieldId: Integer

): Integer; 
public function GetFormFieldRotation( 

   FieldId : int

) : int;
public: int GetFormFieldRotation( 

   int FieldId

) 
public:

int GetFormFieldRotation( 

   int FieldId

) 

Parameters

FieldId
A unique form field identifier specifying a required form field object. You can obtain this identifier using methods like GdPicturePDF.GetFormFieldId, GdPicturePDF.GetFormFieldChildID or methods intended to add form fields.

Return Value

The number of degrees by which the specified form field is rotated counterclockwise relative to the page. The default value is 0. The GdPicturePDF.GetStat method can be subsequently used to determine if this method has been successful.
Remarks
This method is only allowed for use with non-encrypted documents.

It is recommend to use the GdPicturePDF.GetStat method to identify the specific reason for the method's failure, if any.

Example
How to rotate each check box in the current document upside down.
Dim caption As String = "Example: GetFormFieldRotation"

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 message As String = ""

        If count = 0 Then

            message = "This document does not contain any forms."

        Else

            Dim formID As Integer = 0, rotation As Integer = 0

            Dim type As PdfFormFieldType = PdfFormFieldType.PdfFormFieldTypeUnknown

            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

                            rotation = gdpicturePDF.GetFormFieldRotation(formID)

                            If gdpicturePDF.GetStat() = GdPictureStatus.OK Then

                                If gdpicturePDF.SetFormFieldRotation(formID, rotation + 180) <> GdPictureStatus.OK Then

                                    message = message + i.ToString() + ": The SetFormFieldRotation() method has failed with the status: " + gdpicturePDF.GetStat().ToString() + vbCrLf

                                End If

                            Else

                                message = message + i.ToString() + ": The GetFormFieldRotation() method has failed with the status: " + gdpicturePDF.GetStat().ToString() + vbCrLf

                            End If

                        End If

                    Else

                        message = message + i.ToString() + ": The GetFormFieldType() method has failed with the status: " + gdpicturePDF.GetStat().ToString() + vbCrLf

                    End If

                Else

                    message = message + i.ToString() + ": The GetFormFieldId() method has failed with the status: " + gdpicturePDF.GetStat().ToString() + vbCrLf

                End If

            Next

        End If

        If message.Equals("") Then message = "The example has been followed successfully." + vbCrLf

        If gdpicturePDF.SaveToFile("forms_updated.pdf") = GdPictureStatus.OK Then

            message = message + "The file has been saved."

        Else

            message = message + "The file can't be saved. Status: " + gdpicturePDF.GetStat().ToString()

        End If

        MessageBox.Show(message, caption)

    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: GetFormFieldRotation";

GdPicturePDF gdpicturePDF = new GdPicturePDF();

if (gdpicturePDF.LoadFromFile("forms.pdf", false) == GdPictureStatus.OK)

{

    int count = gdpicturePDF.GetFormFieldsCount();

    if (gdpicturePDF.GetStat() == GdPictureStatus.OK)

    {

        string message = "";

        if (count == 0)

            message = "This document does not contain any forms.";

        else

        {

            int formID = 0, rotation = 0;

            PdfFormFieldType type = PdfFormFieldType.PdfFormFieldTypeUnknown;

            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)

                        {

                            rotation = gdpicturePDF.GetFormFieldRotation(formID);

                            if (gdpicturePDF.GetStat() == GdPictureStatus.OK)

                            {

                                if (gdpicturePDF.SetFormFieldRotation(formID, rotation + 180) != GdPictureStatus.OK)

                                    message = message + i.ToString() + ": The SetFormFieldRotation() method has failed with the status: " + gdpicturePDF.GetStat().ToString() + "\n";

                            }

                            else

                                message = message + i.ToString() + ": The GetFormFieldRotation() method has failed with the status: " + gdpicturePDF.GetStat().ToString() + "\n";

                        }

                    }

                    else

                        message = message + i.ToString() + ": The GetFormFieldType() method has failed with the status: " + gdpicturePDF.GetStat().ToString() + "\n";

                }

                else

                    message = message + i.ToString() + ": The GetFormFieldId() method has failed with the status: " + gdpicturePDF.GetStat().ToString() + "\n";

            }

            if (message.Equals("")) message = "The example has been followed successfully.\n";

            if (gdpicturePDF.SaveToFile("forms_updated.pdf") == GdPictureStatus.OK)

                message = message + "The file has been saved.";

            else

                message = message + "The file can't be saved. Status: " + gdpicturePDF.GetStat().ToString();

        }

        MessageBox.Show(message, 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();
See Also