gridview 绑定某字段的函数

有时候，我们要对某字段进行处理后再绑定到gridview 

<asp:TemplateField HeaderText="体检类型">                              
                                <ItemTemplate>
                                    <%# GetcardType((string)Eval("standby1"))%>
                                </ItemTemplate>
                            </asp:TemplateField>

.cs 函数

       //绑定后半段
        public string GetcardType(string card)
        {
            if(!string.IsNullOrEmpty(card))
           // return card.Substring(0, card.IndexOf("|"));
                return card.Substring((card.IndexOf("|")+1));
            return "未知卡类型";
        }