I have two TextBoxes. One is txtIssueDate and other is txtExpiryDate. txtIssueDate is used with CalendarExtender and a button to popup the calender to select IssueDate for txtIssueDate.Text. I want that when user select the IssueDate from calender, txtExpiryDate.Text automatically set to IssueDate + 3 years. To achieve this task I used the TextChange Event of txtIssueDate but It doesn't work. There is also an event with the name "OnClientDateSelectionChanged" for CalendarExtender, but I have no idea how to use it to achieve this task. Is there anyway to get expiry date automatically in this scenario?
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