GetCustomPDFInformation Method (GdPicturePDF)

In This Topic

Returns a string containing the value of the specified custom information key (the custom metadata field) in the currently loaded PDF document.

Syntax

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

'Declaration
 
Public Function GetCustomPDFInformation( _
   ByVal Key As String _
) As String

public string GetCustomPDFInformation( 
   string Key
)

public function GetCustomPDFInformation( 
    Key: String
): String;

public function GetCustomPDFInformation( 
   Key : String
) : String;

public: string* GetCustomPDFInformation( 
   string* Key
)

public:
String^ GetCustomPDFInformation( 
   String^ Key
)

Parameters

Key: The name of the required custom information key.

Return Value

The value of the specified custom information key as a string. The 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 GetStat method to identify the specific reason for the method's failure, if any.

Example

How to find out the names of the custom metadata fields and their values if they are specified in the PDF document.

VB.NET
C#

Dim gdpicturePDF As New GdPicturePDF()
Dim status As GdPictureStatus = gdpicturePDF.LoadFromFile("test.pdf", False)
If status = GdPictureStatus.OK Then
    Dim keys As String = gdpicturePDF.GetCustomPDFInformationKeys(vbCrLf)
    status = gdpicturePDF.GetStat()
    If status = GdPictureStatus.OK Then
        If keys.Equals("") Then
            MessageBox.Show("Your PDF document does not contain any custom keys.", "Example: GetCustomPDFInformation")
        Else
            MessageBox.Show("All custom keys are:" + vbCrLf + keys, "Example: GetCustomPDFInformation")
            Dim value As String = ""
            Dim outPut As String = ""
            Dim keyTable As String() = Split(keys, vbCrLf)
            For x As Integer = 0 To keyTable.Length - 1
                value = gdpicturePDF.GetCustomPDFInformation(keyTable(x))
                status = gdpicturePDF.GetStat()
                If status = GdPictureStatus.OK Then
                    outPut = outPut + keyTable(x) + " = " + value + vbCrLf
                Else
                    MessageBox.Show("The GetCustomPDFInformation() method has failed with the status: " + status.ToString(), "Example: GetCustomPDFInformation")
                End If
            Next
            MessageBox.Show("Custom keys and values are:" + vbCrLf + outPut, "Example: GetCustomPDFInformation")
        End If
    Else
        MessageBox.Show("The GetCustomPDFInformationKeys() method has failed with the status: " + status.ToString(), "Example: GetCustomPDFInformation")
    End If
Else
    MessageBox.Show("The file can't be loaded.", "Example: GetCustomPDFInformation")
End If
gdpicturePDF.Dispose()

GdPicturePDF gdpicturePDF = new GdPicturePDF();
GdPictureStatus status = gdpicturePDF.LoadFromFile("test.pdf", false);
if (status == GdPictureStatus.OK)
{
    string keys = gdpicturePDF.GetCustomPDFInformationKeys("\n");
    status = gdpicturePDF.GetStat();
    if (status == GdPictureStatus.OK)
    {
        if (keys.Equals(""))
        {
            MessageBox.Show("Your PDF document does not contain any custom keys.", "Example: GetCustomPDFInformation");
        }
        else
        {
            MessageBox.Show("All custom keys are:\n" + keys, "Example: GetCustomPDFInformation");
            string[] names = keys.Split('\n');
            string value = "";
            string output = "";
            foreach (var name in names)
            {
                value = gdpicturePDF.GetCustomPDFInformation(name);
                status = gdpicturePDF.GetStat();
                if (status == GdPictureStatus.OK)
                {
                    output = output + name + " = " + value + "\n";
                }
                else
                {
                    MessageBox.Show("The GetCustomPDFInformation() method has failed with the status: " + status.ToString(), "Example: GetCustomPDFInformation");
                }
            }
            MessageBox.Show("Custom keys and values are:\n" + output, "Example: GetCustomPDFInformation");
        }
    }
    else
    {
        MessageBox.Show("The GetCustomPDFInformationKeys() method has failed with the status: " + status.ToString(), "Example: GetCustomPDFInformation");
    }
}
else
{
    MessageBox.Show("The file can't be loaded.", "Example: GetCustomPDFInformation");
}
gdpicturePDF.Dispose();

Reference

GdPicturePDF Class
GdPicturePDF Members
LoadFromFile Method
GetCustomPDFInformationKeys Method
SetCustomPDFInformation Method
DeleteCustomPDFInformation Method