/// <summary> DEMO 3: Read the resulting demo2.dat file, change the title, publisher, and add
/// a subject field and then save it again</summary>
private static void demo3()
{
Console.WriteLine("Performing demo3");
// Create the marc21 exchange reader
MARC21_Exchange_Format_Parser parser1 = new MARC21_Exchange_Format_Parser();
// Read the record
MARC_Record record = parser1.Parse("demo2.dat");
// If this is null, say so
if (record == null)
{
Console.WriteLine("Unable to read the demo2.dat in the 3rd demo portion");
return;
}
// Change the title field ( 245 )
record[245][0].Add_NonRepeatable_Subfield('a', "New Title");
// Also change the creator field (110 in this case)
record[110][0].Add_NonRepeatable_Subfield('a', "Corn Maze Production, Incorporated");
// Add a new field to record
MARC_Field newSubject = record.Add_Field(650, ' ', '0');
newSubject.Add_Subfield('a', "Soils");
newSubject.Add_Subfield('x', "Phosphorous content");
newSubject.Add_Subfield('z', "Indonesia");
// Save this as XML and also as Marc21
record.Save_MARC_XML("demo3.xml");
record.Save_MARC21("demo3.dat");
}
/// <summary> Reads the data from a XML Node Reader </summary>
/// <param name="nodeReader">XML Node Reader </param>
/// <param name="Record"> Record into which to read the contents of the MarcXML file </param>
/// <returns>TRUE if successful, otherwise FALSE </returns>
public static bool Read_MARC_Info(XmlReader nodeReader, MARC_Record Record)
{
try
{
// Move to the this node
move_to_node(nodeReader, "record");
// Get the leader information
int tag = -1;
while (nodeReader.Read())
{
if ((nodeReader.NodeType == XmlNodeType.EndElement) && (nodeReader.Name == "record"))
{
return(true);
}
if (nodeReader.NodeType == XmlNodeType.Element)
{
switch (nodeReader.Name.Trim().Replace("marc:", ""))
{
case "leader":
nodeReader.Read();
Record.Leader = nodeReader.Value;
break;
case "controlfield":
// Get the tag
if (nodeReader.MoveToAttribute("tag"))
{
// The tag should always be numeric per the schema, but just relaxing this
// for invalid MARC so the rest of the data can be successfully read.
if (Int32.TryParse(nodeReader.Value, out tag))
{
// Move to the value and then add this
nodeReader.Read();
Record.Add_Field(tag, nodeReader.Value);
}
}
break;
case "datafield":
// Set the default indicators
char ind1 = ' ';
char ind2 = ' ';
// Get the indicators if they exist
while (nodeReader.MoveToNextAttribute())
{
if (nodeReader.Name.Trim() == "ind1")
{
string temp1 = nodeReader.Value;
if (temp1.Length > 0)
{
ind1 = temp1[0];
}
}
if (nodeReader.Name.Trim() == "ind2")
{
string temp2 = nodeReader.Value;
if (temp2.Length > 0)
{
ind2 = temp2[0];
}
}
if (nodeReader.Name.Trim() == "tag")
{
tag = Convert.ToInt32(nodeReader.Value);
}
}
// Add this datafield
MARC_Field newField = Record.Add_Field(tag, ind1, ind2);
// Now, add each subfield
while (nodeReader.Read())
{
if ((nodeReader.NodeType == XmlNodeType.EndElement) && (nodeReader.Name.Replace("marc:", "") == "datafield"))
{
break;
}
if ((nodeReader.NodeType == XmlNodeType.Element) && (nodeReader.Name.Replace("marc:", "") == "subfield"))
{
// Get the code
nodeReader.MoveToFirstAttribute();
char subfield = nodeReader.Value.Length > 0 ? nodeReader.Value[0] : ' ';
// Get the value
nodeReader.Read();
string dataValue = nodeReader.Value;
// Save this subfield
newField.Add_Subfield(subfield, dataValue);
// Do some special stuff if this is the 260
if (tag == 260)
{
newField.Control_Field_Value = newField.Control_Field_Value + "|" + subfield + " " + dataValue + " ";
}
}
}
break;
}
}
}
return(true);
}
catch
{
return(false);
}
}
