Change color of particular cell in datagrid based on requirement

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ASP.NET

Hi,

I'm using .net with sharepoint site .

now i'm using DataGrid , what is my requirement is in my DataGrid i'm displaying the Drawing's related information when it's created and when it's released & upload ..... now my req is

1) if the Drawing is newly created and file cann't be upload i want to display upload in red color.

2) if the drawing is newly created give some color for upload.

3) if the drawing is created more than 15 days back and no file can be uploaded give the some different color.



file upload is stored in sharepoint site itself , it's not stored in DataBase side.

How to do this can any one help me to solve this issue
.