No Value: DropDownlist in EditItemTemplate Gridview Problem

[Guest]

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;
            }
        }
    }