IConverter C#,wpf ,checkbox.Checked -

xaml code

<treeview.resources>   <local:booltovisibleorhidden x:key="booltovisconverter" collapse="true"/> </treeview.resources> <treeviewitem header="first child" name="_firstchild"     visibility="{binding path=visibleoncheck, mode=oneway, notifyontargetupdated=true, converter={staticresource booltovisconverter}}" />  <checkbox name="_checkboxvisible" ischecked="{binding path= visibleoncheck, mode=twoway}" content="show" checked="checkbox /> 

checkbox checked

private void checkbox(object sender, routedeventargs e) {   if (messagebox.show("", "", messageboxbutton.yesno) ==      system.windows.forms.dialogresult.yes)   {        visibleoncheck = true;   }    else   {     visibleoncheck = false;    } } 

model code

private bool __visible; public bool visibleoncheck {     { return _ visible; }     set { _visible = value; onpropertychanged("visibleoncheck "); } }  public class booltovisibleorhidden : ivalueconverter {     #region constructors      public booltovisibleorhidden() { }     #endregion      #region propertie collapse      public bool collapse { get; set; }     public bool reverse { get; set; }      #endregion      #region ivalueconverter members      public object convert(object value, type targettype, object parameter, system.globalization.cultureinfo culture)     {         bool bvalue = (bool)value;              if (bvalue != reverse)             {                 return visibility.visible;             }             else             {                 if (collapse)                     return visibility.collapsed;                 else                     return visibility.hidden;             }     }      public object convertback(object value, type targettype, object parameter,                               system.globalization.cultureinfo culture)     {         visibility visibility = (visibility) value;          if (visibility == visibility.visible)             return !reverse;         else             return reverse;     }      #endregion     } 

i want ,treeview item header should visible when messagebox .yes clicked, here visible’s messagebox , treeviewitem same time without clicking messagebox.yes, can 1 please.

you have twoway binding on checkbox visibleoncheck, if check checkbox going toggle visibility on treeviewitem.

if want handle visibleoncheck in checked event handler based on dialogresult have remove twoway binding or binding altogether.

<checkbox name="_checkboxvisible" content="show" checked="checkbox /> 

i suggest using wpf messagebox on winforms one, seems bit odd drag in framework messagebox.

private void checkbox(object sender, routedeventargs e) {    visibleoncheck = messagebox.show("","", messageboxbutton.yesno) == messageboxresult.yes; }  

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edit

since problem due both controls binding visibleoncheck bind treeviewitem visibility directly checkbox in xaml

<textblock text="treeviewitem" visibility="{binding ischecked, elementname=chkbx, converter={staticresource booleantovisibilityconverter}}" /> <checkbox x:name="chkbx" content="checkbox" checked="checked"   /> 

and in event set ischecked based on dialog result

private void checked(object sender, routedeventargs e) {      (sender checkbox).ischecked = messagebox.show("","", messageboxbutton.yesno) == messageboxresult.yes; }