getting value of a column in RowUpdate event of gridview

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C#

ASP.NET

Gridview

Dear Friends, I'm facing problem in a very basic area of gridview. I'm using a Gridview to display records and then have Edit option for each row. I'm not using any control inside gridview, directly values are there.

Now, when user clicks update button in edit mode, not getting updated value from any columns of gridview. Gridview structure is like:

<asp:GridView ID="gvTime" runat="server" AutoGenerateEditButton="True" 
                    AutoGenerateColumns="True" CellPadding="1" CellSpacing="1" 
                    onrowcancelingedit="gvTime_RowCancelingEdit" onrowediting="gvTime_RowEditing" 
                    onrowupdating="gvTime_RowUpdating">
                    <RowStyle HorizontalAlign="Center" />
                    <HeaderStyle HorizontalAlign="Center" />
                    <EditRowStyle BackColor="#CCFFCC" ForeColor="Maroon" HorizontalAlign="Center" />
                </asp:GridView>

Now, in Rowupdating event, it's like :

<pre lang="c#">
 protected void gvTime_RowUpdating(object sender, GridViewUpdateEventArgs e)
        {
int index = int.Parse(Session["Index"].ToString())+1;
GridViewRow row = gvTime.Rows[index];
string overtime = e.NewValues[0].ToString();
gvTime.EditIndex = -1;
BindData();

Here string overtime is always showing olddata, never can pull new data entered by user. I want to manually call SQLCommand to update database based on this updated value from the above function. Please give me some solution.