c# - How to change background on DataGridCell depending on bound complex object value -


this want accomplish: bound collection on datagridd contain instances of rowmodel, illustrated below (minimalized simplicity), , rowmodel can contain instances of validationclass.

public class rowmodel {     public int rowid { get; set; }     public string column1 { get; set; }     public string column2 { get; set; }     public string column3 { get; set; }     public icollection<validationclass> validations { get; set; } }  public class validationclass {     public string tag { get; set; }     public string sourcecolumn { get; set; }     public string errortext { get; set; } }

the validationclass.sourcecolumns references columns in rowmodel has error. tag property of validationclass can either "critical" or "warning".

the validations grabbed database populated external validator. , if validation error has occured 1 or more of columns collection filled 1 validationclass per error.

now, if want set red background color on cell has critical error , yellow background on cell has warning, how can that?

datatriggers or converters, or else? need point me in right direction.

edit: clearify, i'm using c# .net4 wpf datagrid this.

triggers , converters both equaly valid problem. here solution trigger:

<datagrid.resources>     <style targettype="{x:type datagridcell}">         <style.triggers>             <datatrigger binding="{binding path=tag}" value="critical">                 <setter property="background" value="red"/>             </datatrigger>             <datatrigger binding="{binding path=tag}" value="warning">                 <setter property="background" value="yellow"/>             </datatrigger>

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