Validating list View

[srinivas]

Hi Everyone,

I am having a list view with a
1.Input box(name)
2.File button for searching file in the computer and
3.Button to save the data

If i enter any name in the text box it will have to search the name in the data base whether the name exists or not and
if any name exists it should show an error already a name exists please enter another and
If i have include any file it should display 1 else 0
when i click the save button when success it has to save the data to database otherwise it has to show an error 


Thanks,
Srinivas