pulling a numerical value out of a dropdown box html

Question

User-1694438709 posted

Looking for some help on how to pull out a numerical value from a drop down box back into an if statement in a  controller:

Dropdown box:

 <div class="form-group">
            <select class="form-control" name="Role">
                <option value="">Select your accout type</option>
                <option value="0">optionOne</option>
                <option value="1">otionTwo</option>
            </select>
        </div>

     
 if (optionOne is chosen)
 {
       set a database field to 2                
 }

 if(optionTwo is chosen)                
 { 
       set a database field to 3
 }

I'm looking at inserting two different integers  into a database depending on which option is selected from the dropdown box.

Answer 1

User475983607 posted

Honestly, this is a very basic question that indicates you need to go through beginning level MVC tutorials before moving forward.  

[HttpPost]
public IActionResult Index(int? Role)
{
    if (Role.HasValue)
    {
        User.Role = Role;
    }
            
    return View();
}

@{
    ViewData["Title"] = "Home Page";
}

<h1>Post Select Example</h1>

<form method="post">
    <select class="form-control" name="Role">
        <option value="">Select your accout type</option>
        <option value="0">optionOne</option>
        <option value="1">otionTwo</option>
    </select>
    <inpu

https://docs.microsoft.com/en-us/aspnet/core/tutorials/first-mvc-app/start-mvc?view=aspnetcore-3.1&tabs=visual-studio

Answer 2

User711641945 posted

Hi binaary,

It seems you want to know how to pass selected item's value to the controller,right?

Here is a working demo:

View:

<form asp-action="Create">
    <div class="form-group">
        <select class="form-control" name="Role">
            <option value="">Select your accout type</option>
            <option value="0">optionOne</option>
            <option value="1">otionTwo</option>
        </select>
    </div>
    <div>
        <input type="submit" value="create" />
    </div>
</form>

Controller:

[HttpPost]
public void  Create(int Role)
{
    var test = new Test();
    if(Role==0)  //optionOne's value
    {
       test.RoleId =2;
       //do your stuff...      
    }
    if(Role==1) //optionTwo's value
    {
       test.RoleId =3;
       //do your stuff...
    }
}

Result:

Best Regards,

Rena

Answer 3

User-1694438709 posted

Hey, thanks for the reply! I got waylay-ed with other stuff I'll take a look at it now!

Cheers