<asp:TemplateField HeaderText="اليوم">
<ItemTemplate>
<asp:Label ID="Label4" runat="server" Text=`<%#ConvertArDay(Eval("myday").ToString()) %>`></asp:Label>
</ItemTemplate>
<ItemStyle HorizontalAlign="Center" VerticalAlign="Middle" Width="10px" />
</asp:TemplateField>
///////////////////////////////////
protected string ConvertArDay(string dev)
{ //sunday saturday monday tuesday wednesday thursday friday
switch (dev.Trim())
{
case "Sunday": return "الاحد";//1
case "Monday": return "الاثنين"; //2
case "Tuesday": return "الثلاثاء";//3
case "Wednesday": return "الاربعاء";//4
case "Thursday": return "الخميس";//5
default: return "";
}
}