Listview SelectedItem

Thanks for replying but below the textbox there is three buttons. I can add the data into the sql server through the wcf and it will display in the listview. Another two is update and delete button when i clicked on the listview it will display in the textbox where i can edit and update and delete the selected data on the listview. I did the wcf service but my textbox = listview.selecteditem still not working. Thanks.

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Smiths