c# - Access selected item from drop down from two different forms

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I have one drop down list:

@Html.DropDownListFor(m => m.SelectedPassType, Model.PassTypeList)

And two buttons which post back to action methods:

The clear button:

@using (Html.BeginForm("ClearData", "MemberPass", FormMethod.Post))
 
 <div>
 @foreach (var property in ViewData.ModelMetadata.Properties)
 
 <input type="hidden" value="@property.Model" name="@property.PropertyName" />
 
 </div>
 <button>Clear</button>

The submit button:

@using (Html.BeginForm("Submit", "MemberPass", FormMethod.Post))
 
 <div>
 @foreach (var property in ViewData.ModelMetadata.Properties)
 
 <input type="hidden" value="@property.Model" name="@property.PropertyName" />
 
 </div>
 <button>Submit</button>

I'd like to make sure all the model's properties are sent to the action method which is why I'm using the @foreach loop.
However of course this won't work for the drop down because the page's HTML is generated before the user selects the drop down menu item.

How can I get the value of the currently selected item in the drop down and make sure it's posted back to the two form's action methods?

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