Updating Page Title when SelectedIndexChanged

sully7 · November 15th, 2009, 12:18 AM

Hi all,

I'm trying to make it so that the title of my page updates when the selected choice from either the BrowseProducts or BrowseArticles page changes, and I'm having a lot of trouble figuring this out. The ddlDepartments_SelectedIndexChanged only binds data with gvw.Products.DataBind(); however I'm trying to edit the code for BrowseProducts.aspx.cs to update the title in the following way:

Code:

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using MB.TestingMachines;
using MB.TestingMachines.BLL.Store;

namespace MB.TestingMachines.UI
{
   public partial class BrowseProducts : BasePage
   {
      int _departmentID = 0;
       protected void Page_Load(object sender, EventArgs e)
      {
         if (!string.IsNullOrEmpty(this.Request.QueryString["DepID"]))
          _departmentID = int.Parse(this.Request.QueryString["DepID"]);

         if (!this.IsPostBack)
         {
             // try to load the product with the specified ID, and raise an exception if it doesn't exist
             Department department = Department.GetDepartmentByID(_departmentID);
             if (department == null)
                 this.Title = String.Format(this.Title, ("All Products"));
             else
                 this.Title = String.Format(this.Title, (department.Title));
         }
      <!-- THIS IS WHERE I'D ASSUME SOME CODE WOULD GO? -->
      }
   }
}

And the code for the ASPX page is:

Code:

<%@ Page Language="C#" MasterPageFile="~/page.master" EnableEventValidation="false" AutoEventWireup="true" CodeFile="BrowseProducts.aspx.cs" Inherits="MB.TestingMachines.UI.BrowseProducts" Title="Lako Tool | {0}" %>
<%@ MasterType VirtualPath="~/page.master" %>
<%@ Register Src="./Controls/ProductListing.ascx" TagName="ProductListing" TagPrefix="mb" %>

<asp:Content ID="Content" ContentPlaceHolderID="pagecol1" Runat="Server">
<p class="header">Product Catalog</p>
<div class="colText">

   <mb:ProductListing id="ProductListing1" runat="server" />
   
</div>
</asp:Content>

I've tried a few things so far, but nothing has worked. Any tips?

Lee Dumond · November 15th, 2009, 12:20 PM

Since you already have the department names in the ddlDepartments drop down list, probably the easiest way to do this would be to snag it from there in the ddlDepartments_SelectedIndexChanged event handler in ProductListing.ascx.cs.

Code:

protected void ddlDepartments_SelectedIndexChanged(object sender, EventArgs e)
{
   this.Page.Title += " - " + ddlDepartments.SelectedItem.Text;
   
   gvwProducts.PageIndex = 0;
   gvwProducts.DataBind();
}

sully7 · November 15th, 2009, 12:51 PM

Lee,

Thanks! This definitely worked!
For anyone that wants to know for future reference, this is the overall final code that worked for me:

BrowseProducts.aspx.cs

Code:

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using MB.TestingMachines;
using MB.TestingMachines.BLL.Store;

namespace MB.TestingMachines.UI
{
   public partial class BrowseProducts : BasePage
   {
      int _departmentID = 0;

       protected void Page_Load(object sender, EventArgs e)
      {
         if (!string.IsNullOrEmpty(this.Request.QueryString["DepID"]))
          _departmentID = int.Parse(this.Request.QueryString["DepID"]);

         if (!this.IsPostBack)
         {
             // try to load the product with the specified ID, and raise an exception if it doesn't exist
             Department department = Department.GetDepartmentByID(_departmentID);
             if (department == null)
                 this.Page.Title += "All Products";
             else
                 this.Page.Title += department.Title;
         }
      }
   }
}

BrowseProducts.aspx

Code:

<%@ Page Language="C#" MasterPageFile="~/page.master" EnableEventValidation="false" AutoEventWireup="true" CodeFile="BrowseProducts.aspx.cs" Inherits="MB.TestingMachines.UI.BrowseProducts" Title="Lako Tool |  " %>
<%@ MasterType VirtualPath="~/page.master" %>
<%@ Register Src="./Controls/ProductListing.ascx" TagName="ProductListing" TagPrefix="mb" %>

<asp:Content ID="Content" ContentPlaceHolderID="pagecol1" Runat="Server">
<p class="header">Product Catalog</p>
<div class="colText">

   <mb:ProductListing id="ProductListing1" runat="server" />
   
</div>
</asp:Content>

ProductListing.ascx.cs (for ddlDepartments_SelectedIndexChanged)

Code:

       
protected void ddlDepartments_SelectedIndexChanged(object sender, EventArgs e)
        {
            this.Page.Title += ddlDepartments.SelectedItem.Text;

            gvwProducts.PageIndex = 0;
            gvwProducts.DataBind();
        }

Lee Dumond · November 15th, 2009, 01:46 PM

You're welcome.