how to show limited text in grid view cell

<asp:GridView ID="GridView1" Width="100%" AllowSorting="true" CssClass="table-bordered" runat="server" AutoGenerateColumns="False" OnRowUpdating="GridView1_RowUpdating" OnPageIndexChanging="GridView1_PageIndexChanging" AllowPaging="True"
     BackColor="White" DataKeyNames="id" BorderColor="#3366CC" BorderStyle="None" BorderWidth="1px" CellPadding="4">
    <Columns>
        <asp:BoundField ItemStyle-Width="150px" ItemStyle-Height="10px" DataField="page" HeaderText="Page" >
        </asp:BoundField>
        <asp:BoundField ItemStyle-Width="150px" ItemStyle-Height="10px" DataField="title" HeaderText="Title" >
        </asp:BoundField>
        <asp:BoundField ItemStyle-Width="150px" ItemStyle-Height="10px" DataField="keyword" HeaderText="Keyword" >
        </asp:BoundField>
        <asp:BoundField ItemStyle-Width="150px" ItemStyle-Height="10px" DataField="discription" HeaderText="Discription" >
        </asp:BoundField>
        <asp:BoundField ItemStyle-Width="150px" ItemStyle-Height="10px" DataField="date" HeaderText="Date" >
        </asp:BoundField>
       
        <asp:ButtonField ItemStyle-Width="50px" Text="Update" CommandName="update" >
        </asp:ButtonField>
    </Columns>
    <EmptyDataTemplate>
        <strong style="color:red">No Data Found.</strong>
    </EmptyDataTemplate>
</asp:GridView>

in discription column i have 500 charecter but a want to show only 100 charecter