I am working on a windows forms project and i have a Person Class like this (simplified):
class Person
{ public string name;
public int age;
public Person(string nameInput,int ageInput)
{
name=nameInput;
age = ageInput;
}
}
now i wanna initiate some members of the class but i wanna use an Input as the Identifier of the member like this:
Person someTextBox.Text = new Person(name.Text,age.Text);
Because i cant know how many Persons the user wants to make and i cant know how he wants to call them i cant just do somethink like
Person p1 = new Person();
Person p2 = new Person();
Person p3 = new Person();
...
the identifier is important cause i wanna make a dropdown where the user can select his declared Persons and get the information like age shown
Problem is it doesn´t recognize "someTextBox.Text" as a variable but a string
By overriding the ToString()
on the Person
class you can return a specific attribute about the Person
in question such as full name:
public override string ToString()
{
return $"{First} {Last}";
}
So when one sets the DataSource
of the ComboBox
it uses ToString
, since we didn't directly specify a DisplayMember
to use as the viewable strings in the drop down .
Here I am loading a ComboBox
:
public List<Person> People { get; set; }
private void Form1_Load(object sender, EventArgs e)
{
People = new List<Person>()
{
new Person() {First = "Frank", Last = "Wright"},
new Person() {First = "Omega", Last = "Man"}
};
cbPeople.DataSource = people;
}
So when I launch the page I see this:
Here is my full Person
class
public class Person
{
public string First { get; set; }
public string Last { get; set; }
public override string ToString()
{
return $"{First} {Last}";
}
}
How to Retrieve Selected
Note to be clear on what the ComboBox
has as the user selected item, it stores a reference to the People
item and returns it in SelectedItem
or via a number in SelectedIndex
. So if I wanted the current selected item in the last example I would do this:
var mySelectedPerson = cbPeople.SelectedItem;
var name = mySelectedPerson.ToString(); // "Frank Wright"
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