The column name you have entered is already in use or reserved. Choose another name

I have faced very interesting issue last night.One of the users had changed / renamed the default content type “Title” to “Item Title” and when he tried to pull it back it gave an error – “The column name you have entered is already in use or reserved. Choose another name”

After modifying default name to custom name he realized that “Title” name had been changed to all over sites because on site all lists / libraries were inherited from parent content type. As a farm admin I even tried with no luck and got the same error.

I googled the issue and very quickly found resolution on - http://blog.weareon.net/fix-for-the-column-name-that-you-entered-is-already-in-use-or-reserved-choose-another-name/

There is a small JavaScript we have to run in browser which clears all the values in the forbidden column collection array and gives you a confirmation

And after running following JavaScript I got rid of that issue.

javascript:g_FieldName={};alert('Successfully cleared forbidden columns');

Rename wiki page title in MOSS 2007 / SharePoint 2010 without changing site URL

In Wiki pages if you change the page title it will also change the site URL.
So if you have put it as a reference on any site that link will be broken
Here is the method I have successfully used to change the page title without changing the site URL

• Open the SharePoint site in SharePoint Designer


• In Design mode select the page title, and rename it


• Here I have found very weird behavior that in code window <title> parameter is missing so to generate <title> parameter remove Page Title from the design view


• Page title is associated with “SharePoint:ListItemProperty”, so when we remove page title from the page this parameter will be removed in the code <SharePoint:ListItemProperty runat=”server”/>


• Now in the design window add your own title which will generate <p> your title </p> parameter in code and you can refer this parameter for any future changes.

You can hide the page (Wiki page) title by simply adding comment “<!-- <p> title </p> -->”
Feel free to reach me in case of any queries.

Add image to custom list with calculated / conditional column.

This is the method, I followed to achieve – add image to custom list with calculated / conditional column.


Following is the result list (check Status Icon column)

• Diff is a calculated column based on Col1 and Col2
• It compares values of Col1 and Col2 , if Col2 > Col1
  Diff gives us “1″ and if Col1 < Col2 then it gives us “0″

=IF(Col1<=Col2,”1″,”0″)   is the formula I have used

• My AIM is to get “Green” signal when Diff = 1 and “Red” when Diff = 0
• Here I have used KPI icon but we can use any image.
• Download following images on your desktop 

• Navigate to your site > Picture Libraries
• Select Shared Pictures > Upload > Browse
• Select icon image file and upload it to the Share Pictures library
• Click the icon image displayed in the Share Pictures library.
• Click the Preview image displayed on the next screen to view the image itself.
• Copy the Image URL
• Navigate to the List you want to have the icons displayed in.
• List Settings > Create column
• Provide Following details for the column
• Column name – Status Icon
• Column Type – Calculated (calculation based on other columns)
• The data type – Single line of text
• Add it to default view
• This is the conditional “IF” formula I have used 

After adding above formula list will look like

• And finally to convert HTML DIV tag to image we have to add following JavaScript which will call the image from the Shared Picture and display it column.
• Add following JavaScript to Content Editor Web Part after List.

Found following script from
http://blog.pathtosharepoint.com/2008/09/01/using-calculated-columns-to-write-html
to write HTML in to calculated column and convert HTML tag to IMAGE

 
Make sure to add this script in CEWP after list.
Feel free to reach me in case of any doubts.