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2008-12-04 22:15 459 查看

Calculated
Columns - Displaying Images

by oscar 12/1/2007
12:51:00 PM

Recently, I was working on a project that required the creation of an IT
Project Management Site Template. I thought, hmm, pretty straight forward, but
wait, I ran into an issue that I am positive, could have been solved in other
ways (List Event Handler)

The requirement was to display an image based on a certain condition, and
this condition had to do with lookup of other List Column values.

If
you want to display images for a calculated column here are the steps you need
to take:

Modify the FLDTYPES.XML file(or make a copy of it!)

Search for the field definition "Calculated"

On the default rendering pattern, paste the following

<Switch>
<Expr>

<GetFileExtension><Column/></GetFileExtension>

</Expr>
<Case Value="giF">

<HTML><![CDATA[<IMG SRC="]]></HTML><Column
HTMLEncode="TRUE"/><HTML>"</HTML>
</Case>

<Default>
<Column HTMLEncode="TRUE" AutoHyperLink="TRUE"

AutoNewLine="TRUE"/>
</Default>
</Switch>
Create a new Column of type Calculated - put some logic in it like so

=IF(AND(Impact="3",Probability="1"),"/_layouts/images/KPIDefault-1.giF",

IF(AND(Impact="3",Probability="2"),"/_layouts/images/KPIDefault-2.giF",

IF(AND(Impact="3",Probability="3"),"/_layouts/images/KPIDefault-2.giF",

IF(AND(Impact="2",Probability="1"),"/_layouts/images/KPIDefault-1.giF",

IF(AND(Impact="2",Probability="2"),"/_layouts/images/KPIDefault-1.giF",

IF(AND(Impact="2",Probability="3"),"/_layouts/images/KPIDefault-2.giF",

IF(AND(Impact="1",Probability="1"),"/_layouts/images/KPIDefault-0.giF",

IF(AND(Impact="1",Probability="2"),"/_layouts/images/KPIDefault-0.giF",

IF(AND(Impact="1",Probability="3"),"/_layouts/images/KPIDefault-1.giF","other")))))))))

NOTE: The Impact and Probability are columns in the
SharePoint List. Based on this logic, I am re-using the images from the KPIs in
MOSS and simply pointing to them.

And that's it! You now can output
images for your List. Here is how it looks

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Tags: wss 3.0,moss 2007,calculated
Fields,caml
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