wpf - How can I make a formatted TextBlock width data binding localizable? -

in wpf application, display looks this:

user bob has logged off @ 22:17.

where "bob" , "22:17" data-bound values.

the obvious way use stackpanel multiple textblock children, of them data bound:

<stackpanel orientation="horizontal">    <textblock text="the user"/>    <textblock text="{binding path=username}" textblock.fontweight="bold" />    <textblock text="has logged off at"/>    <textblock text="{binding path=logofftime}" textblock.fontweight="bold" /> </stackpanel/> 

this works, it's ugly. program supposed localized different languages, , having separate strings "the user" , "has logged off at" recipie localization disaster.

ideally, this:

<textblock>      <textblock.text>          <multibinding stringformat="{}the user <bold>{0}</bold> has logged off @ <bold>{1}</bold>">              <binding path="username" />              <binding path="logofftime" />          </multibinding> </textblock> 

so translator see complete sentence the user <bold>{0}</bold> has logged off @ <bold>{1}</bold>. doesn't work, of course.

this has common problem, what's right solution this?

i've never tried before, if had try , use converter takes multibinding , breaks , returns stackpanel of pieces

for example, binding like:

<label>      <label.content>              <multibinding converter={staticresource textwithboldparametersconverter}>                  <binding source="the user {0} has logged off @ {1}" />                  <binding path="username" />                  <binding path="logofftime" />              </multibinding>     </label.content> </label> 

and converter like

public class textwithboldparametersconverter: imultivalueconverter {     public object convert(object[] values, type targettype, object parameter, cultureinfo culture)     {         // create stackpanel hold content         // set stackpanel's orientation horizontal           // take values[0] , split {x} tags          // go through array of values parts , create textblock object each part             // if part {x} piece, use values[x+1] text , make textblock bold             // add textblock stackpanel          // return stackpanel     } }