No Value: DropDownlist in EditItemTemplate Gridview Problem

[den 2005]

Hi everybody,

I created a Gridview with a TemplateField and there is Label control in
ItemTemplate and a DropdownList control in EditItemTemplate, I was to
displayed them ok when I click the Edit Command button. But when I about to
get the value of this template field I get an empty string value. I check the
following the local dtFiles has data and the cells are visible at stage right
before foreach GridViewRow gr in gdvFiles.Rows) loop. Can anyone tell what is
missing or I went wrong? Thanks

<asp:GridView ID="gdvFiles" runat="server"
AutoGenerateColumns="False" ShowHeader="False" Width="649px"
OnRowEditing="gdvFiles_RowEditing" OnRowUpdating="gdvFiles_RowUpdating">
.....
<asp:TemplateField HeaderText="FileType"
ShowHeader="False" Visible="False">
<HeaderStyle Width="30px"
HorizontalAlign="Center" VerticalAlign="Middle" />
<ItemStyle Width="30px" HorizontalAlign="Center"
VerticalAlign="Middle" />
<ItemTemplate>

<asp:Label ID="lblFileType" runat="server"
Text='<%# Eval("FileType") %>'></asp:Label>
</ItemTemplate>
<EditItemTemplate>
<asp:DropDownList ID="ddlType"
runat="server" DataSource='<%# LoadFileTypes() %>'
DataTextField="FileTypeCode" DataValueField="FileTypeCode"
OnSelectedIndexChanged="ddlType_SelectedIndexChanged"></asp:DropDownList>
</EditItemTemplate>
</asp:TemplateField>
.....
</asp:GridView>


I need to process the values of this Gridview cells inside in this method:
private void UpdateRelatedFiles(Int32 ideaId, Int32 userId, Int32 langId)
{
....
RetrieveTempData();
LoadFileGrid(true);

foreach (GridViewRow gr in gdvFiles.Rows)
{
id = ((HtmlInputCheckBox)gr.Cells[0].Controls[1]).Value;
fileId = Convert.ToInt32(id);
fname = gr.Cells[1].Text;
ftype = gr.Cells[2].Text;<<<--- STRING VALUE IS EMPTY
fsize = gr.Cells[3].Text;
fpath = gr.Cells[4].Text;
....
}
....
}

private void RetrieveTempData()
{
....
dtFiles = GetTempData("Files");
....
}

private DataTable GetTempData(string choice)
{
try
{
if (...)
....
else if (choice == "Files")
return (DataTable) Session["dtFiles"];
}
catch
{
return null;
}
return null;
}

private void LoadFileGrid(bool colVisible)
{
if (dtFiles != null)
{
DataTable dtLocal = GetTempData("Files");
if (dtLocal != null)
gridview1.DataSource = dtLocal;
else
gridview1.DataSource = dtFiles;
ChangeGridviewColumnVisibility(colVisible, gridview1, "Files",
true);
gridview1.DataBind();
}
}

private void ChangeGridviewColumnVisibility(bool visible, GridView
gdvLocal, string section, bool isUpdate)
{

for (int x = 0; x < gdvLocal.Columns.Count; x++)
{
if (visible)
{
if (gdvLocal.Columns[x].HeaderText == "DocumentID" &&
isUpdate)
gdvLocal.Columns[x].Visible = visible;
else
gdvLocal.Columns[x].Visible = visible;
}
else if (!visible)
{
if (x > 1 && x < gdvLocal.Columns.Count - 1)
gdvLocal.Columns[x].Visible = visible;
}
}
}