SharePoint IRM Protectors implemented in managed code

Can SharePoint IRM (Information Rights Management) Protectors be implemented in managed code (C#)?  – was the question I asked when I had a customer who implemented an IRM protector in C# and was running into a problem in registering it with SharePoint. Technically, SharePoint IRM Protector is a COM interface and their internal implementation should…

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Working with SharePoint 2010 Client Object Model on an SSL enabled site

When working SharePoint 2010 Client Object Model on an SSL enabled SharePoint 2010 site, we also need to pass in the certificate and validate it for the client object model calls to work. Below is a sample. 1: private void button1_Click(object sender, EventArgs e) 2: { 3: ClientContext context = new ClientContext("https://[sharepointserver]"); 4: ServicePointManager.ServerCertificateValidationCallback =…

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Uploading files using Client Object Model in SharePoint 2010

There are 2 ways to upload files to SharePoint 2010 document libraries using managed client object model. The first method uses a client library batch mechanism.  It will encode the binary using BASE64 encoding, which could increase the message size by one third.  There might be problems if this isn’t configured correctly.  An example of…

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LINQ to SharePoint 2010

Wow! LINQ to SharePoint 2010 is awesome! You have to work with it to see how it simplifies development tasks.  I especially love the ability to see what underlying CAML that’s generated on the fly and passed to the server for execution.  With LINQ to SharePoint, I believe, we need to have our business logic…

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HowTo: Create a quizzing application with SharePoint 2007

With SharePoint 2007 “Survey” list template, I recently created a quizzing application.  The thing with survey list is that it stack ranks the questions taking into account how many of the respondents favored each options within that question.  But for a quizzing application, we need to be able to stack rank the respondents on how…

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How do I use SecureString type in SharePoint 2007?

SecureString is the type that’s used for passwords in SharePoint 2007.  You might find its use when you are automating some “higher level” administration operation (like creating a web application for example).  How do you use it is shown below: 1: private static SecureString ConvertString(string strPwd) 2: { 3: if (strPwd == null) 4: return…

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Using Post Caching Substitution in SharePoint 2007 Web Parts

There are good number of articles that explains the different caching option Microsoft Office SharePoint Server 2007 provides and ways to leverage them to achieve better site performance.  However, there are scenarios where you might want to implement output caching on your site/page, but have some controls (Web Parts, User Control) excluded from caching so…

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Wildcard Search in SharePoint

Being able to perform wildcard search is probably an area that’s missing in out of the box search in SharePoint.  Here’s a small web part sample you can use to perform wildcard search in MOSS 2007 (and it can be engineered backward to fit into SharePoint Portal Server 2003 as well). The code in it…

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"Failed to verify user permissions" error when using DspSts.asmx web service

I recently handled a case where the customer sees a “Failed to verify user permissions” error when accessing the DspSts.asmx web service in SharePoint 2007.  Below is the code similar to what they were using to invoke the Query method of DspSts.asmx web service.  It’s also very similar to the same provided in SharePoint SDK. …

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The buzz with "UrlQueryString" in SharePoint navigation

SharePoint’s navigation APIs have a property exposed that allows us to set query string properties for a URL.  Sadly, but not surprisingly, this only works when root site collection has publishing feature enabled.  Reason is simple… One a WSS only OR on a site where publishing feature is not enabled, the property “UrlQueryString” is not…

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