C#

cmd.CommandText = "DELETE FROM Coupon_Info WHERE RecievingDate='" + GridView1.DataKeys[e.RowIndex].Values[0].ToString() + "'";

protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
    {
    cmd.Connection = cnx;
    cmd.CommandText = "DELETE FROM Coupon_Info WHERE RecievingDate='";
    DataKeyArray dk = GridView1.DataKeys;
    IOrderedDictionary iod = dk[e.RowIndex].Values;
    cmd.CommandText += iod[0].ToString();
    cmd.CommandText += "'";
    cnx.Open();
    cmd.ExecuteNonQuery();
    cnx.Close();
    FillVendorGrid();
    }

creend wrote:

It's my mistake,Sorry!

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\ComDlg32\PlacesBar

0 Desktop 
1 Internet Explorer 
2 Start Menu\Programs 
3 My Computer\Control Panel 
4 My Computer\Printers 
5 My Documents 
6 <user name>\Favorites 
7 Start Menu\Programs\Startup 
8 <user name>\Recent 
9 <user name>\SendTo 
a <desktop>\Recycle Bin 
b <user name>\Start Menu 
c logical "My Documents" desktop icon 
d "My Music" folder 
e "My Videos" folder 
10 <user name>\Desktop 
11 My Computer 
12 Network Neighborhood (My Network Places) 
13 <user name>\nethood 
14 Windows\Fonts 
16 All Users\Start Menu 
17 All Users\Start Menu\Programs 
18 All Users\Startup 
19 All Users\Desktop 
1a <user name>\Application Data 
1b <user name>\PrintHood 
1c <user name>\Local Settings\Applicaiton Data (nonroaming)0x001d // nonlocalized startup 
1e Nonlocalized common startup 
1f Common favorites 
20 Internet Cache 
21 Cookies 
22 History 
23 All Users\Application Data 
24 GetWindowsDirectory() 
25 GetSystemDirectory() 
26 C:\Program Files 
27 C:\Program Files\My Pictures 
28 USERPROFILE 
29 x86 system directory on RISC 
2a x86 C:\Program Files on RISC 
2b C:\Program Files\Common 
2c x86 Program Files\Common on RISC 
2d All Users\Templates 
2e All Users\Documents 
2f All Users\Start Menu\Programs\Administrative Tools 
30 <user name>\Start Menu\Programs\Administrative Tools 
31 Network and Dial-up Connections 
35 All Users\My Music 
36 All Users\My Pictures 
37 All Users\My Video 
38 Resource Directory 
39 Localized Resource Directory 
3a Links to All Users OEM specific apps 

RegistryKey regKey = Registry.CurrentUser.CreateSubKey(@"Software\Microsoft\Windows\CurrentVersion\Policies\ComDlg32\PlacesBar");
try
    {
    regKey.SetValue("Place0", 6, RegistryValueKind.DWord);
    regKey.SetValue("Place1", @"E:\Correspondance", RegistryValueKind.String);
    }
catch (Exception ex)
    {
    Console.WriteLine(ex.Message);
    }
finally
    {
    regKey.Close();
    }