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.
Set this parameter to true, if you want to enable the Required flag, otherwise set it to false to disable it.
Example





In This Topic
GdPicture14 Namespace / GdPicturePDF Class / SetFormFieldRequired Method

SetFormFieldRequired Method (GdPicturePDF)

In This Topic
Sets the Required flag of a required form field, that is specified by its unique form field's identifier and it is related to the currently loaded PDF document.

If this flag is set, then the field must have a value at the time it is exported by a submit-form action. Unfortunately the GdPicturePDF doesn't support this feature yet.

Syntax
'Declaration

 


Public Function SetFormFieldRequired( _

   ByVal FieldId As Integer, _

   ByVal Required As Boolean _

) As GdPictureStatus
public GdPictureStatus SetFormFieldRequired( 

   int FieldId,

   bool Required

)
public function SetFormFieldRequired( 

    FieldId: Integer;

    Required: Boolean

): GdPictureStatus; 
public function SetFormFieldRequired( 

   FieldId : int,

   Required : boolean

) : GdPictureStatus;
public: GdPictureStatus SetFormFieldRequired( 

   int FieldId,

   bool Required

) 
public:

GdPictureStatus SetFormFieldRequired( 

   int FieldId,

   bool Required

)

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.
Required
Set this parameter to true, if you want to enable the Required flag, otherwise set it to false to disable it.

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.

Likewise, be aware that the GdPicturePDF doesn't support the submit-form action yet.

Example
How to utilize the Required flag for the newly added text field. 
Dim caption As String = "Example: SetFormFieldRequired"

Dim gdpicturePDF As GdPicturePDF = New GdPicturePDF()

If (gdpicturePDF.NewPDF() = GdPictureStatus.OK) AndAlso

   (gdpicturePDF.NewPage(PdfPageSizes.PdfPageSizeA4) = GdPictureStatus.OK) Then

    gdpicturePDF.SetOrigin(PdfOrigin.PdfOriginTopLeft)

    gdpicturePDF.SetMeasurementUnit(PdfMeasurementUnit.PdfMeasurementUnitCentimeter)

    'Please always select the required page before adding a form field.

    If gdpicturePDF.SelectPage(1) = GdPictureStatus.OK Then

        Dim fontResName As String = gdpicturePDF.AddStandardFont(PdfStandardFont.PdfStandardFontHelvetica)

        If gdpicturePDF.GetStat() = GdPictureStatus.OK Then

            If (gdpicturePDF.SetTextSize(20) = GdPictureStatus.OK) AndAlso

               (gdpicturePDF.DrawText(fontResName, 1, 2, "GER") = GdPictureStatus.OK) AndAlso

               (gdpicturePDF.DrawText(fontResName, 1, 4, "FRA") = GdPictureStatus.OK) Then

                Dim formID As Integer = gdpicturePDF.AddTextFormField(3, 1, 3, 1, "GER-PostalCode", "12345", False, fontResName, 20, 165, 42, 42)

                If gdpicturePDF.GetStat() = GdPictureStatus.OK Then

                    If (gdpicturePDF.SetFormFieldBackgroundColor(formID, 255, 228, 196) <> GdPictureStatus.OK) OrElse

                       (gdpicturePDF.SetFormFieldBorderColor(formID, 255, 69, 0) <> GdPictureStatus.OK) OrElse

                       (gdpicturePDF.SetFormFieldMaxLen(formID, 5) <> GdPictureStatus.OK) OrElse

                       (gdpicturePDF.SetFormFieldComb(formID, True) <> GdPictureStatus.OK) OrElse

                       (gdpicturePDF.SetFormFieldRequired(formID, true) <> GdPictureStatus.OK) OrElse

                       (gdpicturePDF.SetFormFieldDefaultValue(formID, "00000") <> GdPictureStatus.OK) Then

                        MessageBox.Show("Setting properties has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption)

                    End If

                Else

                    MessageBox.Show("The AddTextFormField() method has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption)

                End If

                If gdpicturePDF.GetStat() = GdPictureStatus.OK Then

                    formID = gdpicturePDF.AddTextFormField(3, 3, 3, 1, "FRA-PostalCode", "1234", False, fontResName, 20, 165, 42, 42)

                    If gdpicturePDF.GetStat() = GdPictureStatus.OK Then

                        If (gdpicturePDF.SetFormFieldBackgroundColor(formID, 255, 228, 196) <> GdPictureStatus.OK) OrElse

                           (gdpicturePDF.SetFormFieldBorderColor(formID, 255, 69, 0) <> GdPictureStatus.OK) OrElse

                           (gdpicturePDF.SetFormFieldMaxLen(formID, 4) <> GdPictureStatus.OK) OrElse

                           (gdpicturePDF.SetFormFieldComb(formID, True) <> GdPictureStatus.OK) OrElse

                           (gdpicturePDF.SetFormFieldRequired(formID, true) <> GdPictureStatus.OK) OrElse

                           (gdpicturePDF.SetFormFieldDefaultValue(formID, "0000") <> GdPictureStatus.OK) Then

                            MessageBox.Show("Setting properties has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption)

                        End If

                    Else

                        MessageBox.Show("The AddTextFormField() method has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption)

                    End If

                End If

                If gdpicturePDF.GetStat() = GdPictureStatus.OK Then

                    If gdpicturePDF.SaveToFile("forms_textfield.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

            Else

                MessageBox.Show("Drawing text has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption)

            End If

        Else

            MessageBox.Show("The AddStandardFont() method has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption)

        End If

    Else

        MessageBox.Show("The SelectPage() method has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption)

    End If

Else

    MessageBox.Show("The file can't be created.", caption)

End If

gdpicturePDF.Dispose()
string caption = "Example: SetFormFieldRequired";

GdPicturePDF gdpicturePDF = new GdPicturePDF();

if ((gdpicturePDF.NewPDF() == GdPictureStatus.OK) &&

    (gdpicturePDF.NewPage(PdfPageSizes.PdfPageSizeA4) == GdPictureStatus.OK))

{

    gdpicturePDF.SetOrigin(PdfOrigin.PdfOriginTopLeft);

    gdpicturePDF.SetMeasurementUnit(PdfMeasurementUnit.PdfMeasurementUnitCentimeter);

    //Please always select the required page before adding a form field.

    if (gdpicturePDF.SelectPage(1) == GdPictureStatus.OK)

    {

        string fontResName = gdpicturePDF.AddStandardFont(PdfStandardFont.PdfStandardFontHelvetica);

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

        {

            if ((gdpicturePDF.SetTextSize(20) == GdPictureStatus.OK) &&

                (gdpicturePDF.DrawText(fontResName, 1, 2, "GER") == GdPictureStatus.OK) &&

                (gdpicturePDF.DrawText(fontResName, 1, 4, "FRA") == GdPictureStatus.OK))

            {

                int formID = gdpicturePDF.AddTextFormField(3, 1, 3, 1, "GER-PostalCode", "12345", false, fontResName, 20, 165, 42, 42);

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

                {

                    if ((gdpicturePDF.SetFormFieldBackgroundColor(formID, 255, 228, 196) != GdPictureStatus.OK) ||

                        (gdpicturePDF.SetFormFieldBorderColor(formID, 255, 69, 0) != GdPictureStatus.OK) ||

                        (gdpicturePDF.SetFormFieldMaxLen(formID, 5) != GdPictureStatus.OK) ||

                        (gdpicturePDF.SetFormFieldComb(formID, true) != GdPictureStatus.OK) ||

                        (gdpicturePDF.SetFormFieldRequired(formID, true) != GdPictureStatus.OK) ||

                        (gdpicturePDF.SetFormFieldDefaultValue(formID, "00000") != GdPictureStatus.OK))

                    {

                        MessageBox.Show("Setting properties has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption);

                    }

                }

                else

                    MessageBox.Show("The AddTextFormField() method has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption);

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

                {

                    formID = gdpicturePDF.AddTextFormField(3, 3, 3, 1, "FRA-PostalCode", "1234", false, fontResName, 20, 165, 42, 42);

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

                    {

                        if ((gdpicturePDF.SetFormFieldBackgroundColor(formID, 255, 228, 196) != GdPictureStatus.OK) ||

                            (gdpicturePDF.SetFormFieldBorderColor(formID, 255, 69, 0) != GdPictureStatus.OK) ||

                            (gdpicturePDF.SetFormFieldMaxLen(formID, 4) != GdPictureStatus.OK) ||

                            (gdpicturePDF.SetFormFieldComb(formID, true) != GdPictureStatus.OK) ||

                            (gdpicturePDF.SetFormFieldRequired(formID, true) != GdPictureStatus.OK) ||

                            (gdpicturePDF.SetFormFieldDefaultValue(formID, "0000") != GdPictureStatus.OK))

                        {

                            MessageBox.Show("Setting properties has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption);

                        }

                    }

                    else

                        MessageBox.Show("The AddTextFormField() method has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption);

                }

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

                {

                    if (gdpicturePDF.SaveToFile("forms_textfield.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("Drawing text has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption);

        }

        else

            MessageBox.Show("The AddStandardFont() method has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption);

    }

    else

        MessageBox.Show("The SelectPage() method has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption);

}

else

    MessageBox.Show("The file can't be created.", caption);

gdpicturePDF.Dispose();
Example
How to utilize the Required flag for the newly added text field. Dim caption As String = "Example: SetFormFieldRequired" Dim gdpicturePDF As GdPicturePDF = New GdPicturePDF() If (gdpicturePDF.NewPDF() = GdPictureStatus.OK) AndAlso (gdpicturePDF.NewPage(PdfPageSizes.PdfPageSizeA4) = GdPictureStatus.OK) Then gdpicturePDF.SetOrigin(PdfOrigin.PdfOriginTopLeft) gdpicturePDF.SetMeasurementUnit(PdfMeasurementUnit.PdfMeasurementUnitCentimeter) 'Please always select the required page before adding a form field. If gdpicturePDF.SelectPage(1) = GdPictureStatus.OK Then Dim fontResName As String = gdpicturePDF.AddStandardFont(PdfStandardFont.PdfStandardFontHelvetica) If gdpicturePDF.GetStat() = GdPictureStatus.OK Then If (gdpicturePDF.SetTextSize(20) = GdPictureStatus.OK) AndAlso (gdpicturePDF.DrawText(fontResName, 1, 2, "GER") = GdPictureStatus.OK) AndAlso (gdpicturePDF.DrawText(fontResName, 1, 4, "FRA") = GdPictureStatus.OK) Then Dim formID As Integer = gdpicturePDF.AddTextFormField(3, 1, 3, 1, "GER-PostalCode", "12345", False, fontResName, 20, 165, 42, 42) If gdpicturePDF.GetStat() = GdPictureStatus.OK Then If (gdpicturePDF.SetFormFieldBackgroundColor(formID, 255, 228, 196) <> GdPictureStatus.OK) OrElse (gdpicturePDF.SetFormFieldBorderColor(formID, 255, 69, 0) <> GdPictureStatus.OK) OrElse (gdpicturePDF.SetFormFieldMaxLen(formID, 5) <> GdPictureStatus.OK) OrElse (gdpicturePDF.SetFormFieldComb(formID, True) <> GdPictureStatus.OK) OrElse (gdpicturePDF.SetFormFieldRequired(formID, true) <> GdPictureStatus.OK) OrElse (gdpicturePDF.SetFormFieldDefaultValue(formID, "00000") <> GdPictureStatus.OK) Then MessageBox.Show("Setting properties has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption) End If Else MessageBox.Show("The AddTextFormField() method has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption) End If If gdpicturePDF.GetStat() = GdPictureStatus.OK Then formID = gdpicturePDF.AddTextFormField(3, 3, 3, 1, "FRA-PostalCode", "1234", False, fontResName, 20, 165, 42, 42) If gdpicturePDF.GetStat() = GdPictureStatus.OK Then If (gdpicturePDF.SetFormFieldBackgroundColor(formID, 255, 228, 196) <> GdPictureStatus.OK) OrElse (gdpicturePDF.SetFormFieldBorderColor(formID, 255, 69, 0) <> GdPictureStatus.OK) OrElse (gdpicturePDF.SetFormFieldMaxLen(formID, 4) <> GdPictureStatus.OK) OrElse (gdpicturePDF.SetFormFieldComb(formID, True) <> GdPictureStatus.OK) OrElse (gdpicturePDF.SetFormFieldRequired(formID, true) <> GdPictureStatus.OK) OrElse (gdpicturePDF.SetFormFieldDefaultValue(formID, "0000") <> GdPictureStatus.OK) Then MessageBox.Show("Setting properties has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption) End If Else MessageBox.Show("The AddTextFormField() method has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption) End If End If If gdpicturePDF.GetStat() = GdPictureStatus.OK Then If gdpicturePDF.SaveToFile("forms_textfield.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 Else MessageBox.Show("Drawing text has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption) End If Else MessageBox.Show("The AddStandardFont() method has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption) End If Else MessageBox.Show("The SelectPage() method has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption) End If Else MessageBox.Show("The file can't be created.", caption) End If gdpicturePDF.Dispose() string caption = "Example: SetFormFieldRequired"; GdPicturePDF gdpicturePDF = new GdPicturePDF(); if ((gdpicturePDF.NewPDF() == GdPictureStatus.OK) && (gdpicturePDF.NewPage(PdfPageSizes.PdfPageSizeA4) == GdPictureStatus.OK)) { gdpicturePDF.SetOrigin(PdfOrigin.PdfOriginTopLeft); gdpicturePDF.SetMeasurementUnit(PdfMeasurementUnit.PdfMeasurementUnitCentimeter); //Please always select the required page before adding a form field. if (gdpicturePDF.SelectPage(1) == GdPictureStatus.OK) { string fontResName = gdpicturePDF.AddStandardFont(PdfStandardFont.PdfStandardFontHelvetica); if (gdpicturePDF.GetStat() == GdPictureStatus.OK) { if ((gdpicturePDF.SetTextSize(20) == GdPictureStatus.OK) && (gdpicturePDF.DrawText(fontResName, 1, 2, "GER") == GdPictureStatus.OK) && (gdpicturePDF.DrawText(fontResName, 1, 4, "FRA") == GdPictureStatus.OK)) { int formID = gdpicturePDF.AddTextFormField(3, 1, 3, 1, "GER-PostalCode", "12345", false, fontResName, 20, 165, 42, 42); if (gdpicturePDF.GetStat() == GdPictureStatus.OK) { if ((gdpicturePDF.SetFormFieldBackgroundColor(formID, 255, 228, 196) != GdPictureStatus.OK) || (gdpicturePDF.SetFormFieldBorderColor(formID, 255, 69, 0) != GdPictureStatus.OK) || (gdpicturePDF.SetFormFieldMaxLen(formID, 5) != GdPictureStatus.OK) || (gdpicturePDF.SetFormFieldComb(formID, true) != GdPictureStatus.OK) || (gdpicturePDF.SetFormFieldRequired(formID, true) != GdPictureStatus.OK) || (gdpicturePDF.SetFormFieldDefaultValue(formID, "00000") != GdPictureStatus.OK)) { MessageBox.Show("Setting properties has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption); } } else MessageBox.Show("The AddTextFormField() method has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption); if (gdpicturePDF.GetStat() == GdPictureStatus.OK) { formID = gdpicturePDF.AddTextFormField(3, 3, 3, 1, "FRA-PostalCode", "1234", false, fontResName, 20, 165, 42, 42); if (gdpicturePDF.GetStat() == GdPictureStatus.OK) { if ((gdpicturePDF.SetFormFieldBackgroundColor(formID, 255, 228, 196) != GdPictureStatus.OK) || (gdpicturePDF.SetFormFieldBorderColor(formID, 255, 69, 0) != GdPictureStatus.OK) || (gdpicturePDF.SetFormFieldMaxLen(formID, 4) != GdPictureStatus.OK) || (gdpicturePDF.SetFormFieldComb(formID, true) != GdPictureStatus.OK) || (gdpicturePDF.SetFormFieldRequired(formID, true) != GdPictureStatus.OK) || (gdpicturePDF.SetFormFieldDefaultValue(formID, "0000") != GdPictureStatus.OK)) { MessageBox.Show("Setting properties has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption); } } else MessageBox.Show("The AddTextFormField() method has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption); } if (gdpicturePDF.GetStat() == GdPictureStatus.OK) { if (gdpicturePDF.SaveToFile("forms_textfield.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("Drawing text has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption); } else MessageBox.Show("The AddStandardFont() method has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption); } else MessageBox.Show("The SelectPage() method has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption); } else MessageBox.Show("The file can't be created.", caption); gdpicturePDF.Dispose();
See Also

Reference

GdPicturePDF Class
GdPicturePDF Members
GetFormFieldId Method
GetFormFieldChildID Method
GetFormFieldRequired Method
GetFormFieldsCount Method
GetFormFieldId Method
GetFormFieldChildID Method
GetFormFieldType Method
SetFormFieldValue(Int32,String) Method
SetFormFieldDefaultValue Method