How to set databinding for a usercontrol?

Question

I my project, I want to use a user control which is the combination of a textblock and a textbox. I can create some custom properties for the usercontrol like

  public string Caption
    {
        get
        {
            return this.Block.Text;
        }
        set
        {
            this.Block.Text = value;
        }
    }

    public string Value
    {
        get
        {
            return this.Box.Text;
        }
        set
        {
            this.Box.Text = value;
        }
    }

I also want to set the binding for the textblock in this usercontrol. I know that we have to use a dependency property for that like below:

  public string fieldValue
    {
        get
        {
            return (string)GetValue(fieldValueProperty);
        }
        set
        {
            SetValue(fieldValueProperty, value);
        }
    }          
    public static readonly DependencyProperty fieldValueProperty =
        DependencyProperty.Register("fieldValue", typeof(string), typeof(TextBlox), 
        new FrameworkPropertyMetadata("", FrameworkPropertyMetadataOptions.BindsTwoWayByDefault));

In my actual application:

  <my:TxtBlox HorizontalAlignment="Left" Name="txtBlox1"                      
                 fieldValue="{Binding Path=ProdCode,Mode=TwoWay}"
                 VerticalAlignment="Top" Width="228" />

I am setting the datacontext of the container of this control to a database object.

 oProd = dt.ProdInfoes.First();
        Main.DataContext = oProd;

But I cant get that to work. Any suggestions?

score 2 · Accepted Answer · edited May 23 '17 at 12:27

2

You have to create DependencyProperties Caption and Value instead of plain properties - if you want to bind to them. in your usercontrol xaml you have to set the binding to the properties with ElementName binding. see this post

edited May 23 '17 at 12:27

Community

1
1

answered Jul 20 '12 at 11:10

blindmeis

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How to set databinding for a usercontrol?

1 Answers1