Eight Different Ways to Transfer Data from One Page to Another Page

1. Use the querystring:

protected void QueryStringButton_Click(object sender, EventArgs e)
         {
             Response.Redirect("QueryStringPage.aspx?Data=" + Server.UrlEncode(DataToSendTextBox.Text));
        }

2. Use HTTP POST:

<asp:Button ID="HttpPostButton" runat="server" Text="Use HttpPost"
             PostBackUrl="~/HttpPostPage.aspx" onclick="HttpPostButton_Click"/>

protected void HttpPostButton_Click(object sender, EventArgs e)
        {
     // The PostBackUrl property of the Button takes care of where to send it!
        }

  3. Use Session State:

   protected void SessionStateButton_Click(object sender, EventArgs e)
         {
             Session["Data"] = DataToSendTextBox.Text;
             Response.Redirect("SessionStatePage.aspx");
        }

  4.  Use public properties:

   public string DataToSend
        {
            get
            {
                 return DataToSendTextBox.Text;
             }
        }

        protected void PublicPropertiesButton_Click(object sender, EventArgs e)
         {
             Server.Transfer("PublicPropertiesPage.aspx");
        }

5. Use PreviousPage Control Info:

protected void ControlInfoButton_Click(object sender, EventArgs e)
         {
             Server.Transfer("ControlInfoPage.aspx");
        }

  // target page:
protected void Page_Load(object sender, EventArgs e)
        {
            var textbox = PreviousPage.FindControl("DataToSendTextbox") as TextBox;
             if (textbox != null)
            {
                DataReceivedLabel.Text = textbox.Text;
            }
        }

6. Use HttpContext Items Collection:

  protected void HttpContextButton_Click(object sender, EventArgs e)
         {
             HttpContext.Current.Items["data"] = DataToSendTextBox.Text;
             Server.Transfer("HttpContextItemsPage.aspx");
        }

// target page:
protected void Page_Load(object sender, EventArgs e)
         {
             this.DataReceivedLabel.Text =(String) HttpContext.Current.Items["data"];
        }

7. Use Cookies:

protected void CookiesButton_Click(object sender, EventArgs e)
        {
            HttpCookie cook =  new HttpCookie("data");
            cook.Expires = DateTime.Now.AddDays(1);
            cook.Value = DataToSendTextBox.Text;
             Response.Cookies.Add(cook);
             Response.Redirect("HttpCookiePage.aspx");
        }

// target page:
protected void Page_Load(object sender, EventArgs e)
        {
            DataReceivedLabel.Text = Request.Cookies["data"].Value;
        }

8. Use Cache:

protected void CacheButton_Click(object sender, EventArgs e)
         {
             Cache["data"] = DataToSendTextBox.Text;
             Server.Transfer("CachePage.aspx");
        }
   // target page:
    protected void Page_Load(object sender, EventArgs e)
         {
             this.DataReceivedLabel.Text = (string) Cache["data"];
        }

Querying from Dataset

  var qry = from packing in sp_ds.Tables[8].AsEnumerable()
                          where packing.Field<string>("pack_id") == global.prod_mastList[0].Last_pack_id.Trim()
                          select packing;
                if (qry.Count() >= 1)
                {
                    DataTable dt = qry.CopyToDataTable();
                    txtlast_Packing.Text = dt.Rows[0][2].ToString();
                }              

sending TAB key in WPF

 public static void Enter_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.Key == Key.Enter)
            {
                e.Handled = true;
                KeyEventArgs eInsertBack = new KeyEventArgs(Keyboard.PrimaryDevice, Keyboard.PrimaryDevice.ActiveSource, 0, Key.Tab);
                eInsertBack.RoutedEvent = UIElement.KeyDownEvent;
                InputManager.Current.ProcessInput(eInsertBack);
            }
        }