![]() Public static Color FromName(string name)įoreach (PropertyInfo property in typeof(Colors). You could fairly easily fetch the property names and values from once into a map: private static readonly Dictionary KnownColors = FetchColors() If you want to avoid boxing, build a dictionary up to start with for the standard names (still using ColorConverter) and then use the dictionary for subsequent lookups. Call ColorConverter.ConvertFromString and cast the result. Here is a simple example with IValueConverter. Of course, ColorConverter is the way to go. With WPF, its pretty easy to create a converter to display the color of a text depending on an Enum value. Wpf – How do I convert a string like Red to a ? var result = ColorConverter.ConvertFromString(Red) as Color See the following XAML code example.Wpf – How do I convert a string like Red to a ? var color = (Color)ColorConverter.ConvertFromString(Red) After declaring the resource it is necessary to use it with binding. There are two ways to convert Brush to Color: (1) First convert Brush to string, and then to Color. Brush brush new SolidColorBrush (color)) 4. To use a converter you need to implement the interface of the converter class in the XAML page of WPF, you need to declare the resource. Using WPF 4. BrushConverter brushConverter new BrushConverter () Brush brush (Brush)brushConverter.ConvertFromString ( string ) 3. In the preceding scenario the convert back function takes the text of both the first name TextBox and the last name TextBox and concatenates the text with a space between the two texts and returns that to the third TextBox.Īgain, when you fill in the data in the third TextBox, the convert back function takes the text and splits it into an array string using a space and returns that to the source textboxes (first name TextBox and last name TextBox). As mentioned, a WPF value converter needs to implement the IValueConverter interface, or alternatively, the IMultiValueConverter interface (more about that. The convert back function splits the concatenated string with a space to an array of strings and returns the items of the array to the corresponding source. ![]() The convert function in the preceding code concatenates the two data items coming from the two sources with a space between them and returns the concatenated data to the target. return values = value.ToString().Split( ' ' ) If you have developed apps for Universal Windows Platform there must be situations where you had to convert Hex-code to Color.public class FullNameConverter : IMultiValueConverter.In the following code example of the fullnameconverter class I have used both the convert and convert back functions to do it.Ĭode Example-2 declaring fullnameconverter class In this case the convert back function of IMultiValueConverter interface must be usde. Let's say you have three textboxes, the first TextBox is for taking the first name of a person, the second is for taking the last name and the third one is for displaying the text of the preceding two textboxs jointly with a space between them and vice-versa. ![]() ![]() I have another example for the convert back function. ![]() In this example if the text of the two texboxs is found to be empty then the convert function will return false otherwise true. In the preceding code, the convert function checks all the bound data, if any of them are null or empty then it will return false to disable the button control otherwise it will return true to enable the button control. public object ConvertBack( object value, Type targetTypes, object parameter, culture).IsNullOrEmpty(values.ToString()) || string. public object Convert( object values, Type targetType, object parameter, culture).public class MultivalueConverter:IMultiValueConverter. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |