c# - Resizeable grid columns -

i have 4 panels arranged 1 column after another. each panel fixed except 3rd one, should big possible.

i want able toggle visibility of 1st, 2nd, , 4th panels.

i tried using grid , toggling different columns:

<grid grid.row="1" name="resizablepanels">     <grid.columndefinitions>         <columndefinition width="40" name="gridcoltools"/>         <columndefinition width="100" name="gridcolstamps"/>         <columndefinition width="*" name="gridcolcanvas"/>         <columndefinition width="256" name="gridcolpropertiesandlayers"/>     </grid.columndefinitions>     ... <grid> 

but hides panels without repositioning , resizing 3rd panel.

i tried wrappanel, couldnt work because 3rd panel's size unknown.

how can toggle visibility of columns , resize appropriately?

you need make width of hideable columns "auto", , set widths (40, 100, 256) on controls contained in each grid column.

right specifying columns take size - if set them auto, third column (with width *) soak space provide when hide them.

as @blam noted, need use visibility.collapsed work - hidden won't cut here, since hidden controls still take space.