Validating drop down list in asp c sharp

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Data-val ="true" and data-val-required="The Select Tea Type field is required." are coming because By default MVC adds [Required] attribute to non-nullable value types. You have noticed that 2 extra attributes are added in the html output: data-val and data-val-required. Example: operation with complete programming example. Here I am adding some more programming examples on Drop Down List, you must check and learn them for better understanding. Add model name in the top of the view as follows: select List: It is the list of items. string option Label is the optional informative string like please choose item, select item, select value etc. object Html Attributes adds extra features to dropdownlist. It allows us to select an option from the dropdown list. NET provides a tag to create Drop Down List for web application. We are creating Drop Down List by using Visual Studio 2017. We have added more items to it and now, it looks like the following. Now, we will add a new Drop Down List by dragging it from the toolbox. Now, to add items to the list, visual studio provides Items property where we can add items. Click on the items (collection) and it will pop up a new window as given below. It provides add button to add new items to the list.To do that within Excel, just go to the Data ribbon, and the Data Validation button displays a dialog like the one below. Turns out it’s not very complicated, as I just found out.

validating drop down list in asp c sharp-17

Both of these fields are required – this way we can test rendering of selected dropdown list value on the postback.

You'll see this behavior because Drop Down List For will peek in Model State to see the last value for Selected Flavor Id, and build the drop down list with the last selected flavor marked as selected.

It's the same magic Web Form programmers see with View State.

Before using this method, you must bind views with a model.

To fix it, add the following line into Application_Start method in file. Drop Down List For is strongly bounded with model properties and checks for all errors at compile time.

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