WPF Bind ItemSource to Property of Instance in Array

Question

Let's say I have a class Organisation:

public class Organisation(){
   public string Name{
      get;
      set;
   }
   public string Code{
      get;
      set;
   }
}

Then I create an array of Organisation:

public Organisation[] Organisations;

The organisation information is stored in an xml and are filled into the array, which works great.

My problem is, that I'd like to bind the ItemSource of the Combobox to the Name property of my Organisations.

It would be very easy if I just have an array of strings which represent the names:

public string[] OrgansationNames = new string[]{"Organ1", "Organ2" /**/};

I could then easily bind like this:

ItemSource="{Binding Path=OrganisationNames}"

Obviously it is a little more complex and I need something like this:

ItemSource="{Binding Path=Organisations[].Name}"

It is not clear to me how I should specify the Path in this case...

Farhad Jabiyev · Accepted Answer · 2015-03-11 09:41:54Z

3

You can use DisplayMemberPath property:

<ComboBox ...
          ItemSource="{Binding Path=OrganisationNames}"
          DisplayMemberPath="Name" />

Additionally, you can use SelectedValuePath property, which will specifiy the path to the property that is used to determine the value of the SelectedValue property.

<ComboBox ...
          ItemSource="{Binding Path=OrganisationNames}"
          DisplayMemberPath="Name" 
          SelectedValuePath="ID"/>

If you have not any Id, then you can set SelectedValuePath to Name also.

edited Mar 11, 2015 at 9:41

answered Mar 11, 2015 at 9:36

Farhad Jabiyev

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4 Comments

Noël Widmer Over a year ago

I tested it and it works (!) without specifying a SelectedValuePath. What is it supposed to solve?

Farhad Jabiyev Over a year ago

You can remove it, The SelectedValuePath property specifies the path to the property that is used to determine the value of the SelectedValue property.

Noël Widmer Over a year ago

This is absoluty amazing! I didn't know about SVP. OMG thank you so much. This will save me some calls :) Will accept in 7 min...

Liero Over a year ago

@Farhad Jabiyev: just to complete the answer. if you needed to display something more that just a single property in each item, e.g. FirstName and LastName and Photo, you can use ItemTemplate istead of DisplayMemberPath: msdn.microsoft.com/en-us/library/ms742521(v=vs.110).aspx

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