Get an error after updating the core properties

Question

Hello,
I have just started using Open XML and I am trying to do something really simple to get and set the core properties of a document. I am using the following code
public static void getProps(String fileName)
WordprocessingDocument document = null;
try
document = WordprocessingDocument.Open(fileName, false);
var docProps = document.PackageProperties;
Console.WriteLine("Category " + docProps.Category);
Console.WriteLine("ContentStatus " + docProps.ContentStatus);
Console.WriteLine("ContentType " + docProps.ContentType);
Console.WriteLine("Created " + docProps.Created);
Console.WriteLine("Creator " + docProps.Creator);
Console.WriteLine("Description " + docProps.Description);
Console.WriteLine("Identifier " + docProps.Identifier);
Console.WriteLine("Keywords " + docProps.Keywords);
Console.WriteLine("Language " + docProps.Language);
Console.WriteLine("LastModifiedBy " + docProps.LastModifiedBy);
Console.WriteLine("LastPrinted " + docProps.LastPrinted);
Console.WriteLine("Modified " + docProps.Modified);
Console.WriteLine("Revision " + docProps.Revision);
Console.WriteLine("Subject " + docProps.Subject);
Console.WriteLine("Title " + docProps.Title);
Console.WriteLine("Version " + docProps.Version);
catch (Exception ex)
Console.WriteLine(ex.Message);
finally
document.Close();
and
public static void setProps(String fileName)
WordprocessingDocument document = null;
try
document = WordprocessingDocument.Open(fileName, true);
var docProps = document.PackageProperties;
docProps.Category = "test21";
docProps.ContentStatus = "test21";
docProps.ContentType = "test21";
docProps.Created = DateTime.Now;
docProps.Creator = "test21";
docProps.Description = "test21";
docProps.Identifier = "test21";
docProps.Keywords = "test21";
docProps.Language = "test21";
docProps.LastModifiedBy = "test21";
docProps.LastPrinted = DateTime.Now;
docProps.Modified = DateTime.Now;
docProps.Revision = "test21";
docProps.Subject = "test21";
docProps.Title = "test21";
docProps.Version = "test21";
catch (Exception ex)
Console.WriteLine(ex.Message);
finally
document.Close();
after I call the setProps if I try to open the word document with word I will get an error that says
file xxx.docx cannot be opened because there is a problem with the contents
and then tells me that it has found some unreadable context and if I would like restore the document.
could someone tell me what I am doing wrong? and why this is happening.
cheers,
Ehsan 

Answer 1

Hi Ehsan,
Thanks for posting in MSDN forum.
According to your description, the document couldn't be open after set the package properties for it.
After the investigation, I found that we couldn't set a string value for the
Revision package property. Here is the statement:
The Revision property indicates the number of changed saves or revisions.
The application is responsible for updating the Revision property value after each revision
After I change it to a number the code works well for me. For example:
docProps.Revision = "2";
Also here is the link for this property for your reference:
PackageProperties.Revision
Property
Regards & Fei
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