Wpf cannot find resource named converter

I've installed Synfusion components and new Package sources have been added. Changing from "All" to "nuget. Using this pre-release there is no more the problem "Cannot find resource named MaterialDesignComboBox". I am getting same error again in MaterialDesignThemes v3. XamlParseException: ''Provide value on 'System.

StaticResourceExtension' threw an exception. Resource names are case sensitive. Skip to content. Star New issue. Jump to bottom. Cannot find resource named 'MaterialDesignComboBox'. Copy link. Where is this error coming from? I copied your App. And my Title error Error appears Have you any Idea? Thx a lot The text was updated successfully, but these errors were encountered:.

Thats my App. The other is the WPF application. Resource names are case sensitive. Stack Overflow for Teams — Collaborate and share knowledge with a private group.

Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Cannot find converter resource Ask Question. Asked 9 years, 8 months ago. Active 9 years, 8 months ago. Viewed 3k times. However, if no user preferences exist yet, you can define that same key string for a ResourceDictionary resource in the initial MergedDictionaries file, and it can serve as the fallback value.

Remember that any value you provide in a primary resource dictionary is always checked before the merged dictionaries are checked, so if you want to use the fallback technique, don't define that resource in a primary resource dictionary. A ThemeResource is similar to a StaticResource , but the resource lookup is reevaluated when the theme changes. In this example, you set the foreground of a TextBlock to a value from the current theme. A theme dictionary is a special type of merged dictionary that holds the resources that vary with the theme a user is currently using on his or her device.

For example, the "light" theme might use a white color brush whereas the "dark" theme might use a dark color brush. The brush changes the resource that it resolves to, but otherwise the composition of a control that uses the brush as a resource could be the same.

To reproduce the theme-switching behavior in your own templates and styles, instead of using MergedDictionaries as the property to merge items into the main dictionaries, use the ThemeDictionaries property.

The value is a string that names the relevant theme—for example, "Default", "Dark", "Light", or "HighContrast". Typically, Dictionary1 and Dictionary2 will define resources that have the same names but different values. For theme dictionaries, the active dictionary to be used for resource lookup changes dynamically, whenever ThemeResource markup extension is used to make the reference and the system detects a theme change.

The lookup behavior that is done by the system is based on mapping the active theme to the x:Key of a specific theme dictionary. It can be useful to examine the way that the theme dictionaries are structured in the default XAML design resources, which parallel the templates that the Windows Runtime uses by default for its controls.

Note how the theme dictionaries are defined first in generic. Each such key is then referenced by elements of composition in the various keyed elements that are outside the theme dictionaries and defined later in the XAML. There's also a separate themeresources. The theme areas are duplicates of what you'd see in generic. When you use XAML design tools to edit copies of styles and templates, the design tools extract sections from the XAML design resource dictionaries and place them as local copies of XAML dictionary elements that are part of your app and project.

For more info and for a list of the theme-specific and system resources that are available to your app, see XAML theme resources. First, the resources system has predictable behavior for where it will check for the existence of a resource based on scope.

If a resource isn't found in the initial scope, the scope expands. The lookup behavior continues on throughout the locations and scopes that a XAML resource could possibly be defined by an app or by the system.

If all possible resource lookup attempts fail, an error often results. It's usually possible to eliminate these errors during the development process. The lookup behavior for XAML resource references starts with the object where the actual usage is applied and its own Resources property.

If a ResourceDictionary exists there, that ResourceDictionary is checked for an item that has the requested key. This first level of lookup is rarely relevant because you usually do not define and then reference a resource on the same object. In fact, a Resources property often doesn't exist here.

The lookup sequence then checks the next parent object in the runtime object tree of the app. If a FrameworkElement. Resources exists and holds a ResourceDictionary , the dictionary item with the specified key string is requested. If the resource is found, the lookup sequence stops and the object is provided to the location where the reference was made.

Otherwise, the lookup behavior advances to the next parent level towards the object tree root. The search continues recursively upwards until the root element of the XAML is reached, exhausting the search of all possible immediate resource locations. Note It is a common practice to define all the immediate resources at the root level of a page, both to take advantage of this resource-lookup behavior and also as a convention of XAML markup style.

If the requested resource is not found in the immediate resources, the next lookup step is to check the Application. Resources property. Resources is the best place to put any app-specific resources that are referenced by multiple pages in your app's navigation structure.

Control templates have another possible location in the reference lookup: theme dictionaries. The theme dictionary might be a merged dictionary from Application.

The theme dictionary might also be the control-specific theme dictionary for a templated custom control. Finally, there is a resource lookup against platform resources.

Platform resources include the control templates that are defined for each of the system UI themes, and which define the default appearance of all the controls that you use for UI in a Windows Runtime app. Platform resources also include a set of named resources that relate to system-wide appearance and themes. These resources are technically a MergedDictionaries item, and thus are available for lookup from XAML or code once the app has loaded.

For example, the system theme resources include a resource named "SystemColorWindowTextColor" that provides a Color definition to match app text color to a system window's text color that comes from the operating system and user preferences.

Other XAML styles for your app can refer to this style, or your code can get a resource lookup value and cast it to Color in the example case. Because of the tiered lookup behavior for resource dictionaries, you can deliberately define multiple resource items that each have the same string value as the key, as long as each resource is defined at a different level.

In other words, although keys must be unique within any given ResourceDictionary , the uniqueness requirement does not extend to the lookup behavior sequence as a whole. During lookup, only the first such object that's successfully retrieved is used for the XAML resource reference, and then the lookup stops.