mvvm - Get data from a user control in wpf to an user control? -

basically i'm new wpf. have user control - a. inside a, have user control b. when button on b pressed, value passed a. i`m trying wpf mvvm. kindly me.

//-------------------mainwindow------------------// public partial class mainwindow : window {     public delegate void valuepassdelegate(int valuetoget);     public event valuepassdelegate valuepassevent;      public usercontrol1 usercontrol1obj = new usercontrol1();     public usercontrol2 usercontrol2obj = new usercontrol2();          public mainwindow()     {         initializecomponent();         valuepassevent += new valuepassdelegate(method1);         usercontrol1obj.del = valuepassevent;     }     public void method1(int valuetoget)     {         usercontrol2obj.txtname.text = valuetoget.tostring();     } }  //---------------------usercontrol1------------------// public partial class usercontrol1 : usercontrol {     public delegate del;     public int valuetopass = 0;     public usercontrol1()     {         initializecomponent();     }     public void method1()     {         del.dynamicinvoke(valuetopass);     }     private void button_click(object sender, routedeventargs e)     {         method1();     } }  //-----------------usercontrol2--------------------//  public partial class usercontrol2 : usercontrol {     public int valuetoget;     public usercontrol2()     {         initializecomponent();      } } 

these codes of usercontrol1, usercontrol2, , mainwindow. kindly let me know error in this

mainwindow.xaml

<window x:class="testmultipleusercontrol.mainwindow"         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"         xmlns:controls="clr-namespace:testmultipleusercontrol"          title="mainwindow" height="350" width="525">     <grid>         <controls:usercontrol1 name="usercontrol1obj" margin="10,-5,38,148"/>         <controls:usercontrol2 name="usercontrol2obj" margin="153,171,38,10"/>     </grid> </window> 

mainwindow.xaml.cs

public partial class mainwindow : window {     public delegate void valuepassdelegate(int valuetoget);     public event valuepassdelegate valuepassevent;      public mainwindow()     {         initializecomponent();         valuepassevent += new valuepassdelegate(method1);         usercontrol1obj.del = valuepassevent;     }     public void method1(int valuetoget)     {         usercontrol2obj.txtname.text = valuetoget.tostring();     } } 

usercontrol1.xaml

<usercontrol x:class="testmultipleusercontrol.usercontrol1"              xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"               xmlns:d="http://schemas.microsoft.com/expression/blend/2008"               mc:ignorable="d"               d:designheight="300" d:designwidth="300">     <grid>         <button content="button" horizontalalignment="left" margin="77,121,0,0" verticalalignment="top" width="166" height="44" click="button_click"/>      </grid> </usercontrol> 

usercontrol1.xaml.cs

public partial class usercontrol1 : usercontrol {     public delegate del;     public int valuetopass = 0;     public usercontrol1()     {         initializecomponent();     }     public void method1()     {         del.dynamicinvoke(valuetopass);     }     private void button_click(object sender, routedeventargs e)     {         method1();     } } 

usercontrol2.xaml

<usercontrol x:class="testmultipleusercontrol.usercontrol2"              xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"               xmlns:d="http://schemas.microsoft.com/expression/blend/2008"               mc:ignorable="d" d:designwidth="300" height="174.286">     <grid>         <textbox x:name="txtname" horizontalalignment="left" height="46" margin="51,55,0,0" textwrapping="wrap" text="" verticalalignment="top" width="211"/>      </grid> </usercontrol> 

usercontrol2.xaml.cs

public partial class usercontrol2 : usercontrol {         public usercontrol2()     {         initializecomponent();         } } 

it work perfect !!!