c# - Databinding a Datagrid -

after being unsuccessful in databinding observable collection datagrid (another question in same forum), tried reduce scope. project has 1 datagrid, 1 observablecolection , 1 class. still databinding failing.. please help..

using system.collections.objectmodel; using system.windows;  namespace testdatagrid {     /// <summary>     /// interaction logic mainwindow.xaml     /// </summary>     public partial class mainwindow : window     {         public mainwindow()         {             initializecomponent();         }     }      public class mainviewmodel     {         public observablecollection<optionstrike> oos = new observablecollection<optionstrike>(new optionstrike[]             {                 new optionstrike("put", 7500.00, 12345),                 new optionstrike("call", 7500.00, 123),                 new optionstrike("put", 8000.00, 23645),                 new optionstrike("call", 8000.00,99999)             });     }      public class optionstrike     {         public optionstrike(string p1, double p2, int p3)         {             // todo: complete member initialization             this.type = p1;             this.strike = p2;             this.volume = p3;         }          public string type { get; set; }         public double strike { get; set; }         public double volume { get; set; }     } } 

this xaml..

<window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:testdatagrid" x:class="testdatagrid.mainwindow" title="mainwindow" height="350" width="525">    <window.datacontext>      <local:mainviewmodel/>    </window.datacontext>    <grid>      <stackpanel>        <datagrid itemssource="{binding oos}" autogeneratecolumns="true" />      </stackpanel>    </grid>  </window>

you need expose observablecollection property, not field.

public class mainviewmodel {     public observablecollection<optionstrike> oos { get; set; }      public mainviewmodel()     {         oos = new observablecollection<optionstrike>(new optionstrike[]         {             new optionstrike("put", 7500.00, 12345),             new optionstrike("call", 7500.00, 123),             new optionstrike("put", 8000.00, 23645),             new optionstrike("call", 8000.00,99999)         });     } } 

you cannot bind fields, see here more information on subject.