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Tasks illustrated in this walkthrough include the following: Although this walkthrough shows how to display a drop-down list populated with values from the same column as the one bound to the control, there are many alternate methods for populating a drop-down list.

Drop Down List is an list web server control that allow us to select a single item from a drop-down-list at a time. the following c# example code demonstrate us how can we validate a dropdownlist control in a web form.

I have a requiredfieldvalidator for my dropdownlist. User choses some options(somewhere else) and according to that I fill the dropdown list and make it visible. Add(new List Item("John Player", "JP")); ddl_season. This can be beneficial to other community members reading the thread.

Even when I add items to my dropdownlist, the requiredfieldvalidator doesn't seem to acknowledge it. Now I want to use a required field validator on the dropdown list to make sure that the dropdownlist is not empty. Add(new List Item("--Select one--", "")); ddl_season.

tells "Can't convert [value] to Select List Item" or some of a kind.

I figured out there is no straight-forward mapping for drop down selected value (looks like I'll have to read value from Form value collection), but how can I ignore binding and validation for List property? Is Valid attribute to be true if all the other fields are populated properly.

asp net validating drop down lists-87

It is tricky and avoids the use of Java Script function to validate List Box and Drop Down List. For validating Drop Down List, make sure you have "--Select--" option value 0 other wise validation on it will not work.when users submit a form without changing selection of a dropdownlist items, then the first item is post to server as selected item if there is no initial selected item.normally web developers put an instruction only item at dropdownlist items top such as an item with text 'select an item' etc.In this article I try to explain how to validate Drop Down List and List Box using Required Field Validator.I hope after reading this article you will be able to use this trick in your code.For Adding the salary (Create operation), i have to select the month type from the Drop Down List, if the month is not selected the program should not have to redirect to create action.