c# - Show alternating images for changing ViewModel states -


for different user interfaces want show image depending on state of viewmodel object.

for example:

i have database connection, if connected, want show green database image, if not connected want display red database image.

in viewmodel there bool represents state.

possibilities are:

  • having 2 images in view (with converter inversebooleantovisibilityconverter red image), @ same place, showing 1 of them.

  • binding image source (but not want set in viewmodel)

  • some sort of selector?

this state depending image can more of use, e.g. in treeview itemimage.

is there more clever way accomplish that?

i use valueconverter so:

public class booltoimageconverter: dependencyobject, ivalueconverter {      public bitmapimage trueimage     {         { return (bitmapimage)getvalue(trueimageproperty); }         set { setvalue(trueimageproperty, value); }     }     public static dependencyproperty trueimageproperty = dependencyproperty.register("trueimage", typeof(bitmapimage), typeof(booltoimageconverter), null);       public bitmapimage falseimage     {         { return (bitmapimage)getvalue(falseimageproperty); }         set { setvalue(falseimageproperty, value); }     }     public static dependencyproperty falseimageproperty = dependencyproperty.register("falseimage", typeof(bitmapimage), typeof(booltoimageconverter), null);      public object convert(object value, type targettype, object parameter, system.globalization.cultureinfo culture)     {         return (bool)value ? trueimage : falseimage;     }      public object convertback(object value, type targettype, object parameter, system.globalization.cultureinfo culture)     {         var img = (bitmapimage)value;         return img.urisource.absoluteuri == trueimage.urisource.absoluteuri;     }  }

and in xaml

<my:booltoimageconverter x:key="convertername" falseimage="{staticresource falseimage}" trueimage="{staticresource trueimage}"/>

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