binding question

Question

How to bind the replace the following binding syntax with code behind.

  <Grid DataContext="{Binding ElementName=ProductDDS, Path=Data}" HorizontalAlignment="Left" Margin="258,116,0,0" Name="grid1" VerticalAlignment="Top">

 

I tried to amend this, but it did not work.

  <Grid DataContext="{Binding}" HorizontalAlignment="Left" Margin="258,116,0,0" Name="grid1" VerticalAlignment="Top">

 code behide.

mycontext ctx = new mycontext();

ctx.load(GetProductsQuery());

grid1.datacontext=ctx.products

 

 Thanks in advance.

 

 

 

 

 

Answer 1

Hi,

   You are using the DomainDataSource XAML Element, and so there is no direct replacement in Code-Behind, but what it does is the following:

   MyContext ctx = new MyContext();

   ctx.Load(ctx.GetProductQuery);

   Binding productBinding = new Binding();

   productBinding.Source = cts.Products;

   productBinding.Mode = BindingMode.TwoWay;

   grid1.SetBinding(Grid.DataContextProperty, productBinding);

   In XAML you only need to have the following:

    <Grid HorizontalAlignment="Left" Margin="258,116,0,0" Name="grid1" VerticalAlignment="Top">

This should do the trick, since you don't need to do anything in the XAML or else your binding using the code-behing will be overriden.

Hope this solves your problem.

Answer 2

http://forums.silverlight.net/forums/p/149373/333746.aspx

Answer 3

Thanks for your information, but it generated the error message regarding the path propery if i set the binding mode in code-behide.

 

 

Answer 4

Hi,

What's the error message saying? You can set the path property when you initialize a binding object, like this:

Binding productBinding = new Binding("Data");

Answer 5

Hi,

   Sorry, the problem happens because you need to set the Path property of the Binding needs to be set, and in my sample I forgot that.

  So in order to do what you need you should do the following:

   MyContext ctx = new MyContext();

   ctx.Load(ctx.GetProductQuery);

   Binding productBinding = new Binding();

   productBinding.Source = ctx;

   productBinding.Path = new PropertyPath("Products");

   productBinding.Mode = BindingMode.TwoWay;

   grid1.SetBinding(Grid.DataContextProperty, productBinding);

Now it works.