How to make particular cell in datagrid readonly

Should be: protected override void Paint(Graphics gr,Rectangle bnd,CurrencyManager src,int row,Brush bb,Brush fb,bool algn) { ea=new CancelEventArgs(ReadOnly); if(Activation!=null) Activation(this,ea); if(!ea.Cancel) { bb=new SolidBrush(...); fb=new SolidBrush(...); } base.Paint(gr,bnd,src,row,bb,fb,algn); }

Create classes inherited from DataGridColumnStyle(s): DataGridBoolColumn DataGridTextBoxColumn and override some code ... 1. Add event to check if the cell is readolnly or no like Validating or something like it - with row number in EventArgs for instance public event CancelEventHandler Activation; 2. Override Edit() method using this event. protected override void Edit(CurrencyManager Source,int Rownum,Rectangle Bounds,bool ReadOnly,string InstantText,bool CellIsVisible) { ea=new CancelEventArgs(ReadOnly); if(Activation!=null) Activation(this,ea); if(ea.Cancel) base.Edit(Source,Rownum,Bounds,ReadOnly,InstantText,CellIsVisible); } 3. Override Paint() method to change unreadable cell colors etc. protected override void Paint(Graphics gr,Rectangle bnd,CurrencyManager src,int row,Brush bb,Brush fb,bool algn) { ea=new CancelEventArgs(ReadOnly); if(Activation!=null) Activation(this,ea); if(!ea.Cancel) { bb=new SolidBrush(...); fb=new SolidBrush(...); } } 4. Use Your column classes with DataGrid and specify which cells would be readonly in Acitation() event handler. 5. Not tested. Similar solutions works at me. -or- try to inherit from DataGrid (may be it will be simpler, but I don't know how to do it). May be override ColumnStartedEditing() method