November 2006 Entries

Update appSettings in App.Config for executable.

I wanted programmatically (for administrator) to update configuration settings for .Net 2.0 executable. The new in VS 2005 Properties.Settings class saves only user-scope settings, not application scope, which is inconvinient. I've decided to use The easiest way to read/write AppSettings from the very good article Read/Write App.config with .NET 2.0/Enterprise Library However I noticed two issues: config.AppSettings.Settings (KeyValueConfigurationColle... class) has Add and Remove methods, but ......

Link to Russian Bard Club in Melbourne.

It's my second personal/social post in this technical blog. I am participationg in Russian Bard Club "Southern Cross" . I've recently noticed that the club's web site is not shown in Google. Even if it is out-of-date and not complete, it's better to have it searchable, because at least some info can be interesting. I hope that this link will help Google to crawl it ......

Dataset.Merge should invoke virtual Table.Clone for copied tables.

In my previous post I described a problem when Typed Dataset merged into un-typed dataset.I've reviewed the code of Dataset.Merge using Reflector and found, that if table doesn't exist in the current dataset, Table.Clone is called(in internal private DataTable Merger.MergeSchema function) to add a new table to the dataset.Unfortunately,they do not call virtual Table.Clone() method, that is overridden by the derived typed dataset, but use internal DataTable Clone(DataSet cloneDS),which can't be overridden ......

After Merge of Typed Dataset access to row fields causes System.ArgumentException

I am using typed dataset(generated by VS 2005) that I merged to empty dataset (actually to class, derived from dataset). When I am accessed a particular row and tried to read value of the row field, I've got System.ArgumentException: Column <ColumnName> does not belong to table <TableName>. at System.Data.DataRow.CheckCo... column) After debugging and digging into Designer generated code, I found that the cause is that the generated typed-safe columns have property Table as ......

Different MarcXml to DC XSLT stylesheets.

I've compared a few available XSLT stylesheets from standards/marcxml/xslt .As it noted in A Repository of Metadata Crosswalks, the transformation from MARC XML to Unqualified Dublin Core 1.1 is realized in three encodings, requiring three separate XSLT scripts: as OAI DC(MARC21slim2OAIDC.xsl) , as SRW DC(MARC21slim2SRWDC.xsl ) , and as RDF DC(MARC21slim2RDFDC.xsl).I've noted that YAZ Proxy download has slightly different (and seems older) versions of the similar stylesheets. The most notable difference ......

Multiple SCOPE folders in WEBDAV folder queries.

I am using WebDAV queries against Exchange Public queries. Because MAPI folders do not support deep traverse, I've used Multiple Folders as it is shown in MSDN : SELECT "DAV:displayname"FROM SCOPE('shallow traversal of "http://myserver/public"', 'shallow traversal of "http://myserver/public/use... 'shallow traversal of "http://myserver/public/use... And I beleive that it worked against Exchange 2000 (I couldn't confirm it, because I have now only Excahge 2003 available). But ......