Avoiding “Target type 'type name' is not convertible to base type System.String”

问题

I am using ReSharper 6.1.1 and having the solution wide analysis enabled in my project shows up with an error:

Target type 'CustomControls.XSButton' is not convertible to base type System.String

The code compiles and runs fine since a built in TypeConverter in WPF takes care of this, shortly described in a ReSharper bug report.

Note that the XSButton is declared in an assembly in my solution - It's not a WPF built in type.

This is the xaml code that causes this error at the <Style> tag.

<CustomControls:XSButton
        Content="i" Grid.Column="2" Command="ApplicationCommands.Help"
        Grid.Row="0" Grid.RowSpan="2" ToolTip="Show Help" Visibility="Collapsed">
    <CustomControls:XSButton.Style>
         <Style TargetType="{x:Type CustomControls:XSButton}">
             <Setter Property="Height" Value="26"/>
             <Setter Property="Width" Value="26"/>
             <Setter Property="CornerRadius" Value="13"/>
         </Style>
   </CustomControls:XSButton.Style>
</CustomControls:XSButton>

Is there any way to avoid this:

The attribute expects a System.String so what string literal should I replace the type instance with?
Is there any way to ignore this ReSharper error?
Is thare any way to rearange the xaml to avoid this error? E.g. se attributes directl rather than using setters?

EDIT

The problem only appears when the style tag is inside a tag of the same type, in this case "foo:Bar". Note that I'm open o avoiding this error any way possible? Perhaps completely rearrange the xaml code.

回答1:

Unfortunately, it's a bug in R# 6.1.1. Issue is already fixed and a fix will be available in a next major R# version. Sorry for the inconvenience.

You can really simply workaround it like this:

<foo:Bar Command="ApplicationCommands.Help">
  <!-- just use the separate resource for base style: -->
  <foo:Bar.Resources>
    <Style x:Key="baseStyle" TargetType="{x:Type foo:Bar}">
    </Style>
  </foo:Bar.Resources>

    <foo:Bar.Style>
        <Style TargetType="{x:Type foo:Bar}"
               BasedOn="{StaticResource baseStyle}">
            <Setter Property="VerticalAlignment" Value="Top"/>
        </Style>
    </foo:Bar.Style>
</foo:Bar>

Just put the BasedOn style declaration into separate resource.

回答2:

To just hide the error for ReSharper's solution wide analyzation you can set your error to be ignored.
Open Soultion Errors Window by ReSharper->Windows->Soultion Errors Window.
Right-click annoying error and select Ignore Error.

Here is a screenshot with another error as an example:

If you want to enable the error again you can revert the error ignoring:

来源：https://stackoverflow.com/questions/9432174/avoiding-target-type-type-name-is-not-convertible-to-base-type-system-string

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xml

xaml

resharper