WPF DateTime Formatting -

i need format date, used below:

        <xcdg:column title="registratiedatum" fieldname="registratiedatum" width="1*">         <xcdg:column.cellcontenttemplate>             <datatemplate>                    <textblock text="{binding stringformat='{}{0:dd/mm/yyyy hh:mm:ss }', targetnullvalue={x:static system:string.empty}}" />                 </datatemplate>         </xcdg:column.cellcontenttemplate>         </xcdg:column> 

however, of date null, fields remain empty, guess due formatting appears this:

01/01/0001 00:00:00

any idea how restrict format "not null" values? sorry, if might basic question, still @ beginning stage of learning.

a struct being value type, can never null.

however, there several ways can fix issue:

1. the cleanest , logical, in opinion, change datetime nullable<datetime>

   private datetime? mydate; public datetime? mydate {           {         return this.mydate;      }      set      {         this.mydate = value;      } } 

2. if not option, converter trick:

   .xaml code:

   <usercontrol.resources>    <local:dateconverter x:key="dateconverter"/> </usercontrol.resources>           <textblock text="{binding mydate, converter={staticresource dateconverter}}" /> 

   .cs code

   public class dateconverter: ivalueconverter {   public object convert(object value, type targettype, object parameter, cultureinfo culture)   {      if (value != null)      {         datetime mydate = (datetime)value;         if (mydate != datetime.minvalue)         {            return mydate.tostring("dd/mm/yyyy hh:mm:ss");         }      }       return string.empty;   }    public object convertback(object value, type targettype, object parameter, cultureinfo culture)   {      throw new notimplementedexception();   } } 

3. finally, datatrigger directly in xaml code allows hide/collapse control when date null. key, in converter check when date equal datetime.minvalue.

   <usercontrol x:class="wpfapplicationtest.myusercontrol"      xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"      xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"       xmlns:d="http://schemas.microsoft.com/expression/blend/2008"       xmlns:sys="clr-namespace:system;assembly=mscorlib"      xmlns:local="clr-namespace:wpfapplicationtest"      mc:ignorable="d"       d:designheight="300" d:designwidth="300">       <textblock text="{binding mydate, stringformat='{}{0:dd/mm/yyyy hh:mm:ss }'}" >         <textblock.style>            <style targettype="textblock">                  <style.triggers>                     <datatrigger binding="{binding mydate}" value="{x:static sys:datetime.minvalue}">                        <setter property="visibility" value="collapsed"></setter>                     </datatrigger>                  </style.triggers>               </style>            </textblock.style>      </textblock>