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Data Driven Menu Control

Posted on 2006-06-14
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Last Modified: 2012-06-21
Does anyone have a good example of Data driven menu control.. The menu items should be loaded from the values in the database.. The example should include source code and should have been developed using C# and ASP.NET 2005

Thanks in Advance
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Question by:Collindsouza
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REA_ANDREW earned 375 total points
ID: 16900864
I have created one recently. You use A DataSet (In which you can define relationships for foreign keys). I made two functions which makes it real easy to now contruct any menu, with however many Children Etc... Here is the full source code, with two functions and One Call in the Page Load.


//The below goes in the Page Load Event

        if (!IsPostBack)
        {
            PopulateMenu();
        }

//My function here gets the data from the DataBase and returns a DataSet to be used with the final function I will show further down

private DataSet GetDataSetForMenu()
{
  SqlDataAdapter adCat = new SqlDataAdapter("SELECT cat_id, cat_name, link_field, prod_counter FROM menu_creator ORDER BY cat_menu_order", Connection);
  SqlDataAdapter adProd = new SqlDataAdapter("SELECT cat_id, prod_count, prod_name, cat_name FROM start_menu_setup ORDER BY prod_name", Connection);

  DataSet ds = new DataSet();
  adCat.Fill(ds, "menu_creator");
  adProd.Fill(ds, "start_menu_setup");
  ds.Relations.Add("Children",
     ds.Tables["menu_creator"].Columns["cat_id"],
     ds.Tables["start_menu_setup"].Columns["cat_id"]);
  return ds;
}

//Finally this function populates the ASP.NET Menu.


  private void PopulateMenu()
  {

  DataSet ds = GetDataSetForMenu();

  foreach (DataRow parentItem in ds.Tables["menu_creator"].Rows)
  {
      if (Convert.ToInt32(parentItem["prod_counter"]) == 1)
      {
          MenuItem categoryItem = new MenuItem((string)parentItem["cat_name"]);
          categoryItem.NavigateUrl = "productdetail.aspx?prod_id=" + Convert.ToInt32(parentItem["link_field"]);
          Menu1.FindItem("Products").ChildItems.Add(categoryItem);
      }
      else
      {
          MenuItem categoryItem = new MenuItem((string)parentItem["cat_name"]);
          Menu1.FindItem("Products").ChildItems.Add(categoryItem);

          foreach (DataRow childItem in parentItem.GetChildRows("Children"))
          {
              MenuItem childrenItem = new MenuItem((string)childItem["prod_name"]);
              childrenItem.NavigateUrl = "productdetail.aspx?prod_id=" + Convert.ToInt32(childItem["prod_count"]);
              categoryItem.ChildItems.Add(childrenItem);
          }
      }
  }
}
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