What does InitializeComponent do and how does it work in WPF

Question

What does InitializeComponent   do  and how does it work in WPF   In general first  but I would especially be interested to know the gory details of order of construction  and what happens when there are Attached Properties

User · Answer

Looking at the code always helps too  That is  you can actually take a look at the generated partial class  that calls LoadComponent  by doing the following    Go to the Solution Explorer pane in the Visual Studio solution that you are interested in  There is a button in the tool bar of the Solution Explorer titled  Show All Files   Toggle that button  Now  expand the obj folder and then the Debug or Release folder  or whatever configuration you are building  and you will see a file titled YourClass g cs    The YourClass g cs     is the code for generated partial class  Again  if you open that up you can see the InitializeComponent method and how it calls LoadComponent     and much more

User · Answer

The call to InitializeComponent    which is usually called in the default constructor of at least Window and UserControl  is actually a method call to the partial class of the control  rather than a call up the object hierarchy as I first expected    This method locates a URI to the XAML for the Window UserControl that is loading  and passes it to the System Windows Application LoadComponent   static method  LoadComponent   loads the XAML file that is located at the passed in URI  and converts it to an instance of the object that is specified by the root element of the XAML file   In more detail  LoadComponent creates an instance of the XamlParser  and builds a tree of the XAML  Each node is parsed by the XamlParser ProcessXamlNode    This gets passed to the BamlRecordWriter class  Some time after this I get a bit lost in how the BAML is converted to objects  but this may be enough to help you on the path to enlightenment   Note  Interestingly  the InitializeComponent is a method on the System Windows Markup IComponentConnector interface  of which Window UserControl implement in the partial generated class   Hope this helps

User · Answer

Looking at the code always helps too  That is  you can actually take a look at the generated partial class  that calls LoadComponent  by doing the following    Go to the Solution Explorer pane in the Visual Studio solution that you are interested in  There is a button in the tool bar of the Solution Explorer titled  Show All Files   Toggle that button  Now  expand the obj folder and then the Debug or Release folder  or whatever configuration you are building  and you will see a file titled YourClass g cs    The YourClass g cs     is the code for generated partial class  Again  if you open that up you can see the InitializeComponent method and how it calls LoadComponent     and much more

User · Answer

The call to InitializeComponent    which is usually called in the default constructor of at least Window and UserControl  is actually a method call to the partial class of the control  rather than a call up the object hierarchy as I first expected    This method locates a URI to the XAML for the Window UserControl that is loading  and passes it to the System Windows Application LoadComponent   static method  LoadComponent   loads the XAML file that is located at the passed in URI  and converts it to an instance of the object that is specified by the root element of the XAML file   In more detail  LoadComponent creates an instance of the XamlParser  and builds a tree of the XAML  Each node is parsed by the XamlParser ProcessXamlNode    This gets passed to the BamlRecordWriter class  Some time after this I get a bit lost in how the BAML is converted to objects  but this may be enough to help you on the path to enlightenment   Note  Interestingly  the InitializeComponent is a method on the System Windows Markup IComponentConnector interface  of which Window UserControl implement in the partial generated class   Hope this helps

User · Answer

The call to InitializeComponent    which is usually called in the default constructor of at least Window and UserControl  is actually a method call to the partial class of the control  rather than a call up the object hierarchy as I first expected    This method locates a URI to the XAML for the Window UserControl that is loading  and passes it to the System Windows Application LoadComponent   static method  LoadComponent   loads the XAML file that is located at the passed in URI  and converts it to an instance of the object that is specified by the root element of the XAML file   In more detail  LoadComponent creates an instance of the XamlParser  and builds a tree of the XAML  Each node is parsed by the XamlParser ProcessXamlNode    This gets passed to the BamlRecordWriter class  Some time after this I get a bit lost in how the BAML is converted to objects  but this may be enough to help you on the path to enlightenment   Note  Interestingly  the InitializeComponent is a method on the System Windows Markup IComponentConnector interface  of which Window UserControl implement in the partial generated class   Hope this helps

User · Answer

The call to InitializeComponent    which is usually called in the default constructor of at least Window and UserControl  is actually a method call to the partial class of the control  rather than a call up the object hierarchy as I first expected    This method locates a URI to the XAML for the Window UserControl that is loading  and passes it to the System Windows Application LoadComponent   static method  LoadComponent   loads the XAML file that is located at the passed in URI  and converts it to an instance of the object that is specified by the root element of the XAML file   In more detail  LoadComponent creates an instance of the XamlParser  and builds a tree of the XAML  Each node is parsed by the XamlParser ProcessXamlNode    This gets passed to the BamlRecordWriter class  Some time after this I get a bit lost in how the BAML is converted to objects  but this may be enough to help you on the path to enlightenment   Note  Interestingly  the InitializeComponent is a method on the System Windows Markup IComponentConnector interface  of which Window UserControl implement in the partial generated class   Hope this helps

User · Answer

Looking at the code always helps too  That is  you can actually take a look at the generated partial class  that calls LoadComponent  by doing the following    Go to the Solution Explorer pane in the Visual Studio solution that you are interested in  There is a button in the tool bar of the Solution Explorer titled  Show All Files   Toggle that button  Now  expand the obj folder and then the Debug or Release folder  or whatever configuration you are building  and you will see a file titled YourClass g cs    The YourClass g cs     is the code for generated partial class  Again  if you open that up you can see the InitializeComponent method and how it calls LoadComponent     and much more

User · Answer

Looking at the code always helps too  That is  you can actually take a look at the generated partial class  that calls LoadComponent  by doing the following    Go to the Solution Explorer pane in the Visual Studio solution that you are interested in  There is a button in the tool bar of the Solution Explorer titled  Show All Files   Toggle that button  Now  expand the obj folder and then the Debug or Release folder  or whatever configuration you are building  and you will see a file titled YourClass g cs    The YourClass g cs     is the code for generated partial class  Again  if you open that up you can see the InitializeComponent method and how it calls LoadComponent     and much more

[c#] What does InitializeComponent() do, and how does it work in WPF?

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