Select and Upload multiple pdf files

Question

Hi..



Requirement -

Option - 1
Take FileUpload control.
Click on "Browse" button.
User should be able to select only pdf files and not any other extension.
Eg - If the file on which the pointer(mouse) is there, is pdf file, it should be selectable.
Else, that file should not be selectable.
Drag and Drop selected multiple pdf files.
Upload them.

Option - 2

Take FileUpload control.
Click on "Browse" button.
User should be able to select only pdf files and not any other extension.
Eg - If the file on which the pointer(mouse) is there, is pdf file, it should be selectable.
Else, that file should not be selectable.
Upload these selected pdf files.
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I tried but failed.... PLEASE HELP !!! Its really urgent and important...
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