"data trigger using converter not working" Code Answer

<textblock 
        grid.column="1" 
        grid.row="1" 
        text="{binding path=gl, stringformat={}{0:n0}}" 
        horizontalalignment="left" 
        fontfamily="verdana"
        fontweight="bold"             
        verticalalignment="center"
        margin="5,2,5,0"
        fontsize="18"
        >
        <textblock.resources>
            <converters:colorconverter x:key="coconverter"></converters:colorconverter>
        </textblock.resources>
      <textblock.style>
          <style>
              <setter property="textblock.foreground" value="tomato" />
              <style.triggers>
                  <datatrigger binding="{binding relativesource={relativesource self}, path=text, converter={staticresource resourcekey=coconverter}}" value="true">
                  <setter property="textblock.foreground" value="limegreen" />
                      </datatrigger>
              </style.triggers>
          </style>
      </textblock.style>

you need to set the foreground property in your style to change it dynamically at runtime.

By Roy Miloh on October 10 2022