อยากทราบวิธีเปลี่ยนค่า Itemdata ใน Gridview ที่มาจาก Database ครับ

Label lblUsed = (Label)(e.Row.FindControl("lblUsed"));
if (lblUsed != null)
{
	if(DataBinder.Eval(e.Row.DataItem, "Used").ToString() == "X")
	{
		lblUsed.Text = "XXXXXXXXXXXXXX";
	}
	else
	{
		lblUsed.Text = "YYYYYYYYYYYYYY";
	}
}

try {
	if (e.Row.RowType == DataControlRowType.DataRow) {
		Label P = e.Row.Cells(2).FindControl("LblPackType");

		if (P.Text == "2P") {
			e.Row.Cells(2).Text = "2 Plus";

		} else {
			e.Row.Cells(2).Text = "Not match";
		}

	}

} catch (Exception ex) {
}

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"
        BorderColor="#E7E7FF" CellPadding="3" BorderStyle="None" Width="99%" Font-Size="13px" 
        DataKeyNames="CpName" AllowPaging="True" PageSize="10" AllowSorting="True" 
        onsorting="GridView1_Sorting" onpageindexchanging="GridView1_PageIndexChanging" 
        OnRowDataBound="GridView1_RowDataBound" >
        <RowStyle BackColor="#F5F5F5" ForeColor="#4A3C8C" />
        <Columns>
            <asp:TemplateField HeaderText="บริษัท" SortExpression="CpName" >
                <ItemTemplate>
                    <asp:Label ID="LblCpName" runat="server" />
                </ItemTemplate><ItemStyle Width="50px" HorizontalAlign="Center" />
            </asp:TemplateField>
            <asp:TemplateField HeaderText="ชื่อแพ็คเกจ" >
                <ItemTemplate>
                    <asp:Label ID="LblPackName" runat="server" />
                </ItemTemplate><ItemStyle />
            </asp:TemplateField>
            <asp:TemplateField HeaderText="ประเภท" >
                <ItemTemplate>
                    <asp:Label ID="LblPackType" runat="server" />
                </ItemTemplate><ItemStyle HorizontalAlign="Center" />
            </asp:TemplateField>
            <asp:TemplateField HeaderText="ชื่อแพลน" >
                <ItemTemplate>
                    <asp:Label ID="LblPlanName" runat="server" />
                </ItemTemplate><ItemStyle />
            </asp:TemplateField>
            <asp:TemplateField HeaderText="ชื่อโปรโมชั่น" >
                <ItemTemplate>
                    <asp:Label ID="LblProName" runat="server" />
                </ItemTemplate><ItemStyle />
            </asp:TemplateField>
            <asp:TemplateField HeaderText="เบี้ยรวม" >
                <ItemTemplate>
                    <asp:Label ID="LblPackSum" runat="server" />
                </ItemTemplate><ItemStyle HorizontalAlign="Right" />
            </asp:TemplateField>
            <asp:TemplateField HeaderText="เบี้ยขาย" >
                <ItemTemplate>
                    <asp:Label ID="LblPackSale" runat="server" />
                </ItemTemplate><ItemStyle HorizontalAlign="Right" />
            </asp:TemplateField>
            <asp:TemplateField HeaderText="ยกเลิก" >
                <ItemTemplate>
                    <asp:Label ID="LblPackCancel" runat="server" ForeColor="Red" />
                </ItemTemplate><ItemStyle Width="50px" HorizontalAlign="Center" />
            </asp:TemplateField>
            <asp:TemplateField HeaderText="แก้ไข" >
                <ItemTemplate>
                    <asp:HyperLink ID="hplEdit" runat="server" Text="Edit" />
                </ItemTemplate><ItemStyle Width="50px" HorizontalAlign="Center" />
            </asp:TemplateField>
                        
        </Columns>
        <FooterStyle BackColor="#B5C7DE" ForeColor="#4A3C8C" />
        <PagerStyle BackColor="#E7E7FF" ForeColor="#4A3C8C" HorizontalAlign="Right" />
        <SelectedRowStyle BackColor="#738A9C" Font-Bold="True" ForeColor="#F7F7F7" />
        <HeaderStyle BackColor="#4A3C8C" Font-Bold="True" ForeColor="#F7F7F7" HorizontalAlign="Center" />
        <AlternatingRowStyle BackColor="#F7F7F7" />
    </asp:GridView>

    // ทำ DataBound แบบกำหนดค่าเอง
    protected void GridView1_RowDataBound(Object s, GridViewRowEventArgs e)
    {
        //บริษัท
        Label LblCpName = (Label)(e.Row.FindControl("LblCpName"));
        if (LblCpName != null)
        {
            LblCpName.Text = (string)DataBinder.Eval(e.Row.DataItem, "CpName");
        }

        //ชื่อแพ็คเกจ
        Label LblPackName = (Label)(e.Row.FindControl("LblPackName"));
        if (LblPackName != null)
        {
            LblPackName.Text = (string)DataBinder.Eval(e.Row.DataItem, "PackName");
        }

        //ประเภท
        Label LblPackType = (Label)(e.Row.FindControl("LblPackType"));
        if (LblPackType != null)
        {
            if ((string)DataBinder.Eval(e.Row.DataItem, "PackType") == "2p")
            {
                LblPackType.Text = "2 Plus";
            }
            if ((string)DataBinder.Eval(e.Row.DataItem, "PackType") == "3p")
            {
                LblPackType.Text = "3 Plus";
            }
            if ((string)DataBinder.Eval(e.Row.DataItem, "PackType") == "3")
            {
                LblPackType.Text = "ประเภท 3";
            }
        }

        //ชื่อแพลน
        Label LblPlanName = (Label)(e.Row.FindControl("LblPlanName"));
        if (LblPlanName != null)
        {
            LblPlanName.Text = (string)DataBinder.Eval(e.Row.DataItem, "PlanName");
        }

        //ชื่อโปรโมชั่น
        Label LblProName = (Label)(e.Row.FindControl("LblProName"));
        if (LblProName != null)
        {
            LblProName.Text = (string)DataBinder.Eval(e.Row.DataItem, "ProName");
        }

        //เบี้ยรวม
        Label LblPackSum = (Label)(e.Row.FindControl("LblPackSum"));
        if (LblPackSum != null)
        {
            LblPackSum.Text = Convert.ToString(DataBinder.Eval(e.Row.DataItem, "PackSum"));
        }

        //เบี้ยขาย
        Label LblPackSale = (Label)(e.Row.FindControl("LblPackSale"));
        if (LblPackSale != null)
        {
            LblPackSale.Text = Convert.ToString(DataBinder.Eval(e.Row.DataItem, "PackSale"));
        }

        //ยกเลิก
        Label LblPackCancel = (Label)(e.Row.FindControl("LblPackCancel"));
        if (LblPackCancel != null)
        {
            if (DataBinder.Eval(e.Row.DataItem, "PackCancel") is Nullable || DataBinder.Eval(e.Row.DataItem, "PackCancel") == "")
            {
                LblPackCancel.Text = "";
            }
            else
            {
                LblPackCancel.Text = Convert.ToString(DataBinder.Eval(e.Row.DataItem, "PackCancel"));
            }            
        }

        //ปุ่มแก้ไข
        HyperLink hplEdit = (HyperLink)(e.Row.FindControl("hplEdit"));
        if (hplEdit != null)
        {
            hplEdit.NavigateUrl = "PackageEdit.aspx?PackID=" + Convert.ToString(DataBinder.Eval(e.Row.DataItem, "PackID"));
        }

    }