C#•4y ago•

13 replies

WPF custom property not recognized by the compiler

I have defined a custom property like below, it's in the namespace

CarApp

CarApp

. It is supposed to represent the binding source that I would "pass" to a control template, defined as a static resource, by it grabbing it from the parent.

public static class TemplateBinding
{
    public static readonly DependencyProperty Property = DependencyProperty.RegisterAttached(
        typeof(TemplateBinding).Name, ownerType: typeof(DataGridColumn), propertyType: typeof(string));

    public static string Get(DataGridColumn target)
    {
        return (string) target.GetValue(Property);
    }

    public static void Set(DataGridColumn target, string value)
    {
        target.SetValue(Property, value);
    }
}

public static class TemplateBinding
{
    public static readonly DependencyProperty Property = DependencyProperty.RegisterAttached(
        typeof(TemplateBinding).Name, ownerType: typeof(DataGridColumn), propertyType: typeof(string));

    public static string Get(DataGridColumn target)
    {
        return (string) target.GetValue(Property);
    }

    public static void Set(DataGridColumn target, string value)
    {
        target.SetValue(Property, value);
    }
}

Then, at the top of my xaml component file, I define a local namescope like this

xmlns:local="clr-namespace:CarApp"

xmlns:local="clr-namespace:CarApp"

. Then, further on, I define my control template, and then my

DataGridTemplateColumn

DataGridTemplateColumn

like this:

<Grid.Resources>
    <DataTemplate x:Key="datePicker">
        <DatePicker SelectedDate="{Binding RelativeSource={RelativeSource TemplatedParent},
                Path=(local:TemplateBinding.Property)}"/>
    </DataTemplate>
</Grid.Resources>

<!-- ... -->

<DataGrid.Columns>
    <DataGridTemplateColumn
        Header="ManufacturedOn"
        CellTemplate="{StaticResource datePicker}"
        local:TemplateBinding.Property="ManufacturedDate" />
</DataGrid.Columns>

<Grid.Resources>
    <DataTemplate x:Key="datePicker">
        <DatePicker SelectedDate="{Binding RelativeSource={RelativeSource TemplatedParent},
                Path=(local:TemplateBinding.Property)}"/>
    </DataTemplate>
</Grid.Resources>

<!-- ... -->

<DataGrid.Columns>
    <DataGridTemplateColumn
        Header="ManufacturedOn"
        CellTemplate="{StaticResource datePicker}"
        local:TemplateBinding.Property="ManufacturedDate" />
</DataGrid.Columns>

When I try to compile the app, there's an error:

error MC3072: The property 'TemplateBinding.Property' does not exist in XML namespace 'clr-namespace:CarApp'. Line 59 Position 21.

error MC3072: The property 'TemplateBinding.Property' does not exist in XML namespace 'clr-namespace:CarApp'. Line 59 Position 21.

Which points to the line where I apply the property.
Clearing the temp files (obj) does not help. What's weird tho, is that removing the

App.xaml

App.xaml

(the entry point) and then compiling doesn't compain about that, it now says that there's no entry point, and the IDE doesn't show me an error in the

xaml

xaml

file, so I guess it compiled, but there might be error order at play too.

WPF custom property not recognized by the compiler

I have defined a custom property like below, it's in the namespace

CarApp

CarApp

. It is supposed to represent the binding source that I would "pass" to a control template, defined as a static resource, by it grabbing it from the parent.

public static class TemplateBinding
{
    public static readonly DependencyProperty Property = DependencyProperty.RegisterAttached(
        typeof(TemplateBinding).Name, ownerType: typeof(DataGridColumn), propertyType: typeof(string));

    public static string Get(DataGridColumn target)
    {
        return (string) target.GetValue(Property);
    }

    public static void Set(DataGridColumn target, string value)
    {
        target.SetValue(Property, value);
    }
}

public static class TemplateBinding
{
    public static readonly DependencyProperty Property = DependencyProperty.RegisterAttached(
        typeof(TemplateBinding).Name, ownerType: typeof(DataGridColumn), propertyType: typeof(string));

    public static string Get(DataGridColumn target)
    {
        return (string) target.GetValue(Property);
    }

    public static void Set(DataGridColumn target, string value)
    {
        target.SetValue(Property, value);
    }
}

Then, at the top of my xaml component file, I define a local namescope like this

xmlns:local="clr-namespace:CarApp"

xmlns:local="clr-namespace:CarApp"

. Then, further on, I define my control template, and then my

DataGridTemplateColumn

DataGridTemplateColumn

like this:

<Grid.Resources>
    <DataTemplate x:Key="datePicker">
        <DatePicker SelectedDate="{Binding RelativeSource={RelativeSource TemplatedParent},
                Path=(local:TemplateBinding.Property)}"/>
    </DataTemplate>
</Grid.Resources>

<!-- ... -->

<DataGrid.Columns>
    <DataGridTemplateColumn
        Header="ManufacturedOn"
        CellTemplate="{StaticResource datePicker}"
        local:TemplateBinding.Property="ManufacturedDate" />
</DataGrid.Columns>

<Grid.Resources>
    <DataTemplate x:Key="datePicker">
        <DatePicker SelectedDate="{Binding RelativeSource={RelativeSource TemplatedParent},
                Path=(local:TemplateBinding.Property)}"/>
    </DataTemplate>
</Grid.Resources>

<!-- ... -->

<DataGrid.Columns>
    <DataGridTemplateColumn
        Header="ManufacturedOn"
        CellTemplate="{StaticResource datePicker}"
        local:TemplateBinding.Property="ManufacturedDate" />
</DataGrid.Columns>

When I try to compile the app, there's an error:

error MC3072: The property 'TemplateBinding.Property' does not exist in XML namespace 'clr-namespace:CarApp'. Line 59 Position 21.

error MC3072: The property 'TemplateBinding.Property' does not exist in XML namespace 'clr-namespace:CarApp'. Line 59 Position 21.

Which points to the line where I apply the property.
Clearing the temp files (obj) does not help. What's weird tho, is that removing the

App.xaml

App.xaml

(the entry point) and then compiling doesn't compain about that, it now says that there's no entry point, and the IDE doesn't show me an error in the

xaml

xaml

file, so I guess it compiled, but there might be error order at play too.

WPF custom property not recognized by the compiler

WPF custom property not recognized by the compiler

Similar Threads

Similar Threads

Similar Threads