The CryptoAPI 2.0 Diagnostics is a feature available on Windows Server 2008+ that supports the trouble shooting of issues concerned with, for example: Certificate Chain Validation Certificate Store Operations Signature Verification This article describes how to enable the CAPI2 Diagnostic, but for an in depth review of the capability, check here. Enable CAPI2 logging by […]
Read More →Troubleshooting badly behaving IIS application pools
There are many reasons why an application pools’ worker process (W3WP.exe) could be behaving badly. The best approach is to capture some memory dumps during the problem situation and then analyze them. The problem with that is the root cause is not always obvious, even after many hours of analysis and investigation. An alternative to […]
Read More →Using the ListCollectionView Filter method in WPF with C#
NOTE: This solution does not implement paging and requires the retrieval of the entire result set. If your dataset is huge, I wouldn’t go this route. Other options, LIKE %text%, FULL-TEXT search, Lucene.Net…and many others… Check out another of my blogs where I defer the retrieval using a Delayed Action. Again, if you look hard […]
Read More →Using the ListCollectionView with a deferred Filter method in WPF with C#
In another blog I covered how to perform filtering using the ListCollectionView class on a datagrid. What I noticed on the implementation on a larger result set was a little lag in the response when characters were being entered into the filter textbox. The way it was implemented was for each character entered; perform a […]
Read More →TextChanged vs. SelectionChange events in WPF
I made the mistake of using the SelectionChange event on a textbox while implementing some filtering on a DataGrid. What happened, when using SelectionChanged, was that each time the textbox received focus I was executing the filter. Even initially when there was nothing to filter. My logic was checking if the contents of the textbox […]
Read More →Using ODP.Net with NHibernate and System.Decimal
A few months ago I wrote a question asking for solutions to this error. There were some good answers but none of them provided me with a work around that was database independent. At least something that would work with both Oracle and SQL Server. I was implementing some calculated fields in NHibernate and I […]
Read More →How to add a watermark to a textbox using WPF
Some time ago I had to implement a search box which filtered a result set in a DataGrid. It was a pretty straight forward exercise. However, it took some time to find a good example and change it into what I needed. Basically, what needs to be done is to add a TextBlock and a […]
Read More →Adding images to a Tree View in WPF using C#
Like I’ve said before, once you find what your looking for, it is wasy to find examples about how to use and implement it. I had this again while trying to add images to a treeview. The term I was looking for, while trying to find a solution was ValueConverter. In this solution I will […]
Read More →WPF DataGrid rendering is very slow
I was developing a WPF application that contained a DataGrid like so many times in the past. However, this time it was taking 20-30 seconds for the DataGrid to render. I checked the query execution speed. I was building the DataTable dynamically, but I checked the speed of that too and it was fast as […]
Read More →NHibernate MappingException association references unmapped class
During the mapping process you may encounter this error. In my situation the case was that I had the wrong namespace identified within the class attribute within a bag element containing a one-to-many element, like the below. <bag name=”Customer”> <key column=”CUST_ID” /> <one-to-many class=”CompanyName.SysName.Nhibernate.Common.Customer” /> </bag> Instead of Common I had another directory […]
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