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ASP.NET

i have created entity data model in DAL. In DAL i have created class Department
as shown in below code.

namespace DAL
{
    [MetadataType(typeof(DepartmentMetaData))]
    public partial class Department
    {
    }

    public class DepartmentMetaData
    {
        [DataType(DataType.Currency)]
        [Range(0, 1000000, ErrorMessage = "Budget must be less than $1,000,000.00")]
        public Decimal Budget { get; set; }

        [DisplayFormat(DataFormatString = "{0:d}", ApplyFormatInEditMode = true)]
        public DateTime StartDate { get; set; }

    }
}

in presentation layer i binded to gridview like this shown below:

<asp:ObjectDataSource ID="obj" runat="server" TypeName="DAL.SchoolRepository"
        DataObjectTypeName="DAL.Department" SelectMethod="GetDepartments">
   </asp:ObjectDataSource>
   <asp:GridView ID="gv" runat="server" DataSourceID="obj" AutoGenerateColumns="False">
       <Columns>
           <asp:BoundField DataField="DepartmentID" HeaderText="DepartmentID" SortExpression="DepartmentID" Visible="false">
           </asp:BoundField>
           <asp:BoundField DataField="Name" HeaderText="Name" SortExpression="Name"></asp:BoundField>
           <asp:BoundField DataField="Budget" HeaderText="Budget" SortExpression="Budget"></asp:BoundField>
           <asp:BoundField DataField="StartDate" HeaderText="StartDate" SortExpression="StartDate">
           </asp:BoundField>
           <asp:TemplateField HeaderText="Administrator">
               <ItemTemplate>
                   <asp:Label ID="lblLastName" runat="server" Text='<%# Eval("Person.LastName") %>' />
                   <asp:Label ID="lblFirstName" runat="server" Text='<%# Eval("Person.FirstName") %>' />
               </ItemTemplate>
           </asp:TemplateField>
       </Columns>
   </asp:GridView>

in that aspx.cs
i wrote page_init event like this.

protected void Page_Init(object sender, EventArgs e)
       {
           gv.EnableDynamicData(typeof(Department));
       }
   }

here in budget it should show dollar currency symbol and start date format like wrote in DAL department.cs

please help me thank you.