BasedOn="{StaticResource {x:Type TextBox}}" in Code Behind for Style

How can you set the following in code behind?

<Style TargetType="{x:Type TextBox}" BasedOn="{StaticResource {x:Type TextBox}}">

I'm using a Theme merged in App.xaml. It works great for all Controls but when I define a Style for something, e.g. TextBox, the Theme Style doesn't get picked up unless I use BasedOn like above, instead it gets the default TextBox Style.

Now I'm creating a DataGridTextColumn in code behind and I can't get the BasedOn pa开发者_JS百科rt to work for the EditingElementStyle

Style editingStyle = new Style(typeof(TextBox));
editingStyle.BasedOn = ...?;

Any suggestions? Also, is there any way to get the Theme Style instead of the default Style applied without using BasedOn?

Thanks

Try this:

editingStyle.BasedOn = (Style) FindResource(typeof (TextBox))

And I don't know any way how you can make it apply the Theme style without specifying BasedOn. If there is such a way, I would like to know it too...

This should work:

Style baseStyle = new Style(typeof(TextBox));
Style editingStyle = new Style(typeof(TextBox));
editingStyle.BasedOn = baseStyle;

You can also do it in the constructor:

Style editingStyle = new Style(typeof(TextBox), baseStyle);

I like the answer of Pavlo Glazkov, but it does not compile.

FindResource is (non-static) member of FrameworkElement. It is required to identify the context of the search request.

So I recommend this:

style.BasedOn = (Style)frameworkElement.FindResource(typeof(TextBox));

Here's a post that occurred a few years after this question and provides a functional way to reference theme from XAML. Per https://stackoverflow.com/a/24286059/5104896

First - Define the XAML resource dictionary with an x:class identifier along with an x:Key of your resource

ResourceDictionary x:Class="YourNameSpaceHere.DataGridCellTemplates"

<Style x:Key="ValidationError_TextBox" TargetType="{x:Type TextBox}">
    <Setter Property="Validation.ErrorTemplate" Value="{StaticResource ValidationErrorTempate}" />
</Style>

Second - Create a .cs file that will initialize the resource class.

using System.Windows;

namespace YourNameSpaceHere
{
    public partial class DataGridCellTemplates : ResourceDictionary
    {
        public DataGridCellTemplates()
        {
            InitializeComponent();
        }
    }
}

Lastly - Reference from you code

using YourNameSpaceHere;
....
var res = new DataGridCellTemplates();
Style test = res["ValidationError_TextBox"] as Style;