1）根据名称查找
PrintPreview fe = new PrintPreview(new Summary()); string strResourceHeader = "headerStyle" + styleSize.ToString(); HeaderStyle = (Style)fe.FindResource(strResourceHeader);
2）根据名称直接获取
Style baseStyle = this.Resources["gridRowStyle"] as Style;
原文：http://www.cnblogs.com/quietwalk/p/3531619.html