A unique form field identifier specifying a required form field object. You can obtain this identifier using these methods: AddTextFormField(Single,Single,Single,Single,String,String,Boolean,String,Single,Color) , GetFormFieldId or GetFormFieldChildID.
The new value of the maximum length of the field's text, in characters, that is user allowed to enter.
Example





In This Topic
GdPicture14 Namespace / GdPicturePDF Class / SetFormFieldMaxLen Method

SetFormFieldMaxLen Method (GdPicturePDF)

In This Topic
Sets the maximum length of the text, in characters, allowed to enter into a required form field, here a text field, that is specified by its unique form field's identifier and it is related to the currently loaded PDF document. As stated, this flag is only specific to text fields, so this method is explicitly applicable to text form field objects.
Syntax
'Declaration

 

Public Function SetFormFieldMaxLen( _

   ByVal FieldId As Integer, _

   ByVal MaxLen As Integer _

) As GdPictureStatus
public GdPictureStatus SetFormFieldMaxLen( 

   int FieldId,

   int MaxLen

)
public function SetFormFieldMaxLen( 

    FieldId: Integer;

    MaxLen: Integer

): GdPictureStatus; 
public function SetFormFieldMaxLen( 

   FieldId : int,

   MaxLen : int

) : GdPictureStatus;
public: GdPictureStatus SetFormFieldMaxLen( 

   int FieldId,

   int MaxLen

) 
public:

GdPictureStatus SetFormFieldMaxLen( 

   int FieldId,

   int MaxLen

) 

Parameters

FieldId
A unique form field identifier specifying a required form field object. You can obtain this identifier using these methods: AddTextFormField(Single,Single,Single,Single,String,String,Boolean,String,Single,Color) , GetFormFieldId or GetFormFieldChildID.
MaxLen
The new value of the maximum length of the field's text, in characters, that is user allowed to enter.

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 text fields, otherwise it will fail.

Example
How to specify the maximum length of the inserted text for the newly added text form fields.
Dim caption As String = "Example: SetFormFieldMaxLen"

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", "", 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.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", "", 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.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: SetFormFieldMaxLen";

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", "", 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.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", "", 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.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