public static void GetFormFieldValue(PdfFormField field)
{
Console.WriteLine("Field: " + field.GetFullName());
var field_obj = field.GetObject();
var value_obj = field_obj.Get("V");
if (value_obj == null)
{
Console.WriteLine("Value is empty");
return;
}
switch (value_obj.GetObjectType())
{
case PdfObjectType.kPdsString:
{
// single value od the form field
PdsString value_str = (PdsString)value_obj;
Console.WriteLine("Value: " + value_str.GetText());
}
break;
case PdfObjectType.kPdsArray:
{
// multiple values (e.g listbox with mutiple selection set)
PdsArray value_arr = (PdsArray)value_obj;
for (var i = 0; i < value_arr.GetNumObjects(); i++)
{
Console.WriteLine("Value" + (i + 1).ToString() + ": " + value_arr.GetText(i));
}
}
break;
}
}
///////////////////////////////////////////////////////////////////////
// ParseElement
///////////////////////////////////////////////////////////////////////
private static void ParseObject(PdsObject obj, int level)
{
if (level == 3)
{
return; // Don't go too deep, it's just a sample.
}
Action <string> dump = str =>
{
Console.WriteLine($"{str}");
};
String indent = new String('-', level);
dump(indent);
// parse element based on type;
PdfObjectType objType = obj.GetObjectType();
switch (objType)
{
case PdfObjectType.kPdsNull:
dump(indent + "null:" + ((PdsBoolean)obj).GetValue());
break;
case PdfObjectType.kPdsBoolean:
dump(indent + "boolean:" + ((PdsBoolean)obj).GetValue());
break;
case PdfObjectType.kPdsNumber:
dump(indent + "number:" + ((PdsNumber)obj).GetValue());
break;
case PdfObjectType.kPdsString:
dump(indent + "string:" + ((PdsString)obj).GetText());
break;
case PdfObjectType.kPdsStream:
dump(indent + "stream:" + ((PdsStream)obj).GetRawDataSize());
ParseObject(((PdsStream)obj).GetStreamDict(), level + 1);
break;
case PdfObjectType.kPdsArray:
{
dump("array:");
PdsArray arr = (PdsArray)obj;
for (int i = 0; i < arr.GetNumObjects(); i++)
{
dump(indent + " [" + i + "]");
ParseObject(arr.Get(i), level + 1);
}
}
break;
case PdfObjectType.kPdsDictionary:
{
dump("dictionary:");
PdsDictionary dict = (PdsDictionary)obj;
for (int i = 0; i < dict.GetNumKeys(); i++)
{
String key = dict.GetKey(i);
dump(indent + " /" + key);
ParseObject(dict.Get(key), level + 1);
}
}
break;
}
}
