Claudiu on SharePoint

Scenario:
On your host-named site collection you are trying to reference an XSLT file hosted in a SharePoint Library.
Assuming you have already checked that the xslt file is where it is expected to be.

Your code could look like this:

XmlUrlResolver resolver = new XmlUrlResolver();
resolver.Credentials = CredentialCache.DefaultCredentials;

XmlTextReader stylesheet = new XmlTextReader(xslLink);
stylesheet.XmlResolver = resolver;

XslCompiledTransform transform = new XslCompiledTransform();
transform.Load(stylesheet);

On the last line you are getting this error:
XSLT compile error.
   at System.Xml.Xsl.Xslt.XsltLoader.LoadStylesheet(XmlReader reader, Boolean include)
   at System.Xml.Xsl.Xslt.XsltLoader.Load(Compiler compiler, Object stylesheet, XmlResolver xmlResolver)
   at System.Xml.Xsl.Xslt.Compiler.Compile(Object stylesheet, XmlResolver xmlResolver, QilExpression& qil)
   at System.Xml.Xsl.XslCompiledTransform.CompileXsltToQil(Object stylesheet, XsltSettings settings, XmlResolver stylesheetResolver)
   at System.Xml.Xsl.XslCompiledTransform.LoadInternal(Object stylesheet, XsltSettings settings, XmlResolver stylesheetResolver)
   at System.Xml.Xsl.XslCompiledTransform.Load(XmlReader stylesheet)

Fix:
On the SharePoint server, add the host-name and IP in the "hosts" file (%systemroot%\system32\drivers\etc\hosts). Your new entry should look like:

10.10.10.190 SharePointTest.microsoft.com 

10.10.10.190 is the server's public IP address
SharePointTest.microsoft.com is your site collection host-name

Cause:
SharePoint is trying to access the XSLT file using a URL like:

http://SharePointTest.microsoft.com/Styles/MyStyleFile.XSLT

and it cannot reach the named address http://SharePointTest.microsoft.com

Note: The change will not take effect immediately. You can wait a few minutes or try this command:

ipconfig /flushdns

Scenario:
You have a custom (helper) DLL that you need to include in your deployment. As this is not a SharePoint solution you cannot deploy the same way you would to with a webpart for example.

Solution:
In Visual Studio, open your solution package:

Select the Advanced tab:

Add your DLL in the dialog:

Scenario:
You want to show a brief status message to the user. The notification will slide in and the out to the right side of the window.

Java Script:

SP.UI.Notify.addNotification('<img src="/_layouts/images/loadingcirclests16.gif" style="vertical-align: top;"/>Loading ...', false);

If you want your notification to stay on the screen until the process finishes you can use a couple of functions like:

function AddNotification() {
  notifyId = SP.UI.Notify.addNotification("Loading ...", true);
}

function RemoveNotification() {
  SP.UI.Notify.removeNotification(notifyId);
  notifyId  = '';
}

More about it on MSDN:
http://msdn.microsoft.com/en-us/library/ee658473(v=office.14).aspx

Scenario:
One or more list fields appear twice on the forms associated to a list (new, edit and view). There are no duplication in the list columns. The list is using a custom content type.

For example the Answer field shows twice on the New FAQ form:

Things to look for:
Check that the field/column is not declared twice in the list settings page.

Cause:
I have seen this happening in 2 cases:
1. when changing and re-deploying the underlying content type
2. when migrating lists from one site to the other (using PowerShell in my case)

Fix:
Browse to the list settings page (on the List Tools - List ribbon click on the List Settings icon)

In the Content Types section click on the content type link

Remove the duplicated column

Scenario:
Your attempt to remote using PowerShell fails with this message:
Cannot access the local farm. Verify that the local farm is properly configured, currently available, and that you have the appropriate permissions to access the database before trying again.

Fix:
1. On the remote machine run the following PowerShell script:

#Enable Windows PowerShell Remoting 
Enable-PSRemoting -Force 
#Enable CredSSP support 
Enable-WSManCredSSP -Role Server -Force 
#Increase memory limit for remote shell 
Set-Item WSMan:\localhost\Shell\MaxMemoryPerShellMB 1000

2. On the client machine run the following PowerShell script:

#enable CredSSP on the client:  
Enable-WSManCredSSP -Role Client -DelegateComputer * -Force   
Set-ItemProperty HKLM:\SYSTEM\CurrentControlSet\Control\Lsa\Credssp\PolicyDefaults\AllowFreshCredentials -Name WSMan -Value WSMAN/*   
Set-ItemProperty HKLM:\SYSTEM\CurrentControlSet\Control\Lsa\Credssp\PolicyDefaults\AllowFreshCredentialsDomain -Name WSMan -Value WSMAN/*

Props:
Josh Gavant: PowerShell Remoting for SharePoint