c# - Changing data when itemsource is specified for a datagrid in wpf -

i have datagrid binding observablecollection of custom type. type has boolean property, "iscopying". "binding" done specifying itemsource property of grid observablecollection.

i want change data before bound grid. grid needs read-only view of data. have changed column header using autogeneratingcolumn event:

if (e.column.header.tostring() == "iscopying") {    datagridtextcolumn t = new datagridtextcolumn();    t.header = "status";    e.column = t; } 

...which works fine. want same thing during binding of individual property cell, of each row. thing work like:

//not real code!!!!!!! private void dgitem_cellbinding(object sender, datagridcellbindingeventargs e) {    mycustomtype theitem = e.(mycustomtype)objectgettingbound;    if (theitem.iscopying == true)    {       e.typegettingbound= datagridcelltype.text //or works;       e.datatobind = "working...";     }else{       e.typegettingbound = datagridcelltype.text;       e.datatobind = "waiting command...";    } } 

hopefully above makes sense. can not find event when individual cell binding , how intercept it. sure common i'm new , can't find on addresses particular issue. maybe i'm going wrong way?

does custom type implement inotifypropertychange?

can add public property custom type raises propertychange event , exposes text hat need?

public class mycustomtype: inotifypropertychanged {         public event propertychangedeventhandler propertychanged;          protected void onpropertychanged(string name)         {             propertychangedeventhandler handler = propertychanged;             if (handler != null)             {                 handler(this, new propertychangedeventargs(name));             }         }          private bool _iscopying;          public bool iscopying         {             { return _iscopying; }             set             {                 _iscopying = value;                 onpropertychanged("iscopyingtext");             }         }          public string iscopyingtext         {                         {                 if(iscopying) return "working...";                 else return "waiting command...";             }         } } 

then bind column iscopyingtext property, , if don't want iscopying column show, set cancel property true in autogeneratingcolumn event (http://msdn.microsoft.com/en-us/library/cc903950(v=vs.95).aspx)

to make grid readonly: http://msdn.microsoft.com/en-us/library/system.windows.controls.datagrid.isreadonly.aspx

another way use ivalueconverter, here:

wpf datagrid - column binding related other columns