组合框更改显示的项目c＃

Question

I have a combobox and a Dictionary as Binding Source from wich i can choose an item and equip an instance with the selected item

comboBoxNutzungsart.DataSource = new BindingSource(Zordnung.dieListe, 
comboBoxNutzungsart.DisplayMember = "Key";
comboBoxNutzungsart.ValueMember = "Value";

lets assume I chose the same instance which I already gave a value, now I want the combobox to show me the item.

Example of what I mean: Person has the atrribute colour and the combobox contains the items "green, yellow, red, blue" at first the attribute for colour is for every person null. (up untill here there is no problem)

I chose for Person 1 the colour red. when I choose Person 1 again I want the combobox to show me the colour red.

I think there might be problem becaus of the BindingSource.

for better a better understanding:

....
public class person 
   public int personNumber
   public double personColourValue
   public string personColour

....
public static Dictionary<string, double>ListColourValue = new Dictionary<string, double> {
{"green", 50},
{"red",  60},
{"yellow", 70}
};

....
cmb.DataSource = new BindingSource(ListColourValue,mull)
cmb.DisplayMember = "Key";
cmb.ValueMember="Value";

....

for personColour= null and person p1

private void cmb_SelectedIndesChandes (object sender, EventArgs e]
{
var selectedItem = (KeyValuePair<string, double> cmb.SelectedItem;
string colour = selectedItem.Key;
double cvalue = selectedItem.Value;
p1.personColourValue = cvalue;
p1.personColour = colour;
}
......

Answer 1

为此，您需要将人的颜色值存储在某个变量中，然后将其与组合框绑定。它将解决您的问题。

Answer 2

Add Color property to Person. Every time color is selected, add to Color property of current Person.

Every time Person changed, set color of combobox with color of selected Person.

Of course, Person List should be stored in somewhere in DB or others else.