search.aspx.cs

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using System;
using System.Web.UI.WebControls;

using AspNet.StarterKits.Classifieds.BusinessLogicLayer;
using AspNet.StarterKits.Classifieds.Web;

public partial class Search_aspx : System.Web.UI.Page
{
	// To customize the search experience so that the page 
	// will display a Category Browse view as seen on the homepage
	// instead of search results, set this to false. Setting to false
	// will only display Category Browse for top level category.
	// Note: how search behaves for an empty search string is
	// related to the behavior set here. See the GetAdsByQuery method
	// in the App_Code/BLL/Ads.cs file.
	private bool _showCategoryBrowseForTopLevel = true;
	private bool _advancedSearchInEffect;

	protected void Page_Load(object sender, EventArgs e)
	{
		_advancedSearchInEffect = Convert.ToBoolean(ViewState["advancedSearchInEffect"]);
		if (!Page.IsPostBack && Page.PreviousPage == null)
		{
			// check if the URL contains a query for ads by a given member
			string memberQs = Request.QueryString["member"];
			if (memberQs != null)
			{
				_showCategoryBrowseForTopLevel = true;
				// pass it on to the hidden AdvSearch control (its stores most search parameters)
				AdvancedSearch.SetMemberName(memberQs);
				_advancedSearchInEffect = true;
				ViewState["advancedSearchInEffect"] = true;
			}


			// check if the URL contains a query for ads in a given category
			string categoryQs = Request.QueryString["c"];
			int categoryIdQs = DefaultValues.CategoryIdMinValue;
			if (categoryQs != null)
			{
				if (Int32.TryParse(categoryQs, out categoryIdQs))
				{
					_showCategoryBrowseForTopLevel = true;
				}
			}

			// if no category was specified in the QueryString, we set it the "All Categories" id (0)
			SetCurrentCategory(categoryIdQs);
			if (_advancedSearchInEffect)
				SetSearchMessage(2);
			else
				SetSearchMessage(1);

		}

		if (Page.IsPostBack)
		{
			if (_advancedSearchInEffect)
				SetSearchMessage(2);
			else
				SetSearchMessage(1);
			UpdateUI();
		}
		if (Page.PreviousPage != null)
		{
			// we check if the request was cross-posted by AdvancedSearch.aspx (in which case we expect to find a control "AdvancedSearch")
			AdvancedSearch_ascx advParameters = Util.FindControlRecursively("AdvancedSearch", Page.PreviousPage.Controls) as AdvancedSearch_ascx;
			if (advParameters != null && advParameters.SearchingByAdvancedCriteria)
			{
				// we import its properties into the (hidden) AdvancedSearch control on this page
				AdvancedSearch.ImportProperties(advParameters);

				// copy the values which the AdSearchDataSource needs on this page (SearchTerm comes from SearchTermTextBox, Category comes from the CategoryDropDown control)
				SetCurrentCategory(AdvancedSearch.CategoryId);
				SearchTermTextBox.Text = AdvancedSearch.SearchTerm;

				SetSearchMessage(2);
				ViewState["advancedSearchInEffect"] = true;

			}
			else if (advParameters != null && !advParameters.SearchTerm.Equals(String.Empty))
			{
				// carry over just search term as regular search in category
				SearchTermTextBox.Text = advParameters.SearchTerm;
				SetCurrentCategory(AdvancedSearch.CategoryId);
				SetSearchMessage(1);
				ViewState["advancedSearchInEffect"] = false;
			}
			else
			{
				// a number of pages contain a generic search text box, which posts back to this page.
				// if found, import the search term text
				TextBox CommonSearchTextBox = Util.FindControlRecursively("CommonSearchTextBox", Page.PreviousPage.Controls) as TextBox;
				if (CommonSearchTextBox != null)
				{
					// query came from Master Page Search Box
					SearchTermTextBox.Text = Server.HtmlEncode(CommonSearchTextBox.Text);
				}

				// if a category was also specified, import it as well
				CategoryDropDown_ascx CommonCategoryDropDown = Util.FindControlRecursively("CommonCategoryDropDown", Page.PreviousPage.Controls) as CategoryDropDown_ascx;
				if (CommonCategoryDropDown != null)
				{
					SetCurrentCategory(CommonCategoryDropDown.CurrentCategoryId);
				}

				// if a "What's new within the last x days" was specified, import it
				DropDownList CommonWhatsNewRangeList = Util.FindControlRecursively("CommonWhatsNewRangeList", Page.PreviousPage.Controls) as DropDownList;
				Button CommonWhatsNewButton = Util.FindControlRecursively("CommonWhatsNewButton", Page.PreviousPage.Controls) as Button;
				if (CommonWhatsNewRangeList != null && !CommonWhatsNewButton.CommandArgument.Equals(String.Empty))
				{
					int numDays = Convert.ToInt32(CommonWhatsNewRangeList.SelectedValue);
					AdvancedSearch.DayRange = numDays;
					SetSearchMessage(2);
				}
				else
				{
					SetSearchMessage(1);
				}
			}
		}
	}

	protected void SetCurrentCategory(int categoryId)
	{
		CategoryDropDown.CurrentCategoryId = categoryId;
		CategoryPath.CurrentCategoryId = categoryId;
		AdvancedSearch.CategoryId = categoryId;
		SubcategoriesList.DataBind();
		UpdateUI();
	}

	protected void SetSearchMessage(int flag)
	{
		switch (flag)
		{
			case 1:
				NormalSearch.Visible = true;
				SearchingByAdvancedPanel.Visible = false;
				if (SearchTermTextBox.Text.Length > 0)
				{
					NormalSearchLabel.Text = "Searching with ";
					NormalSearchCriteria.Text = "search term = \"" + Server.HtmlEncode(SearchTermTextBox.Text) + "\"";
					NormalSearchCriteria.Visible = true;
					ClearSearch.Visible = true;
				}
				else
				{
					NormalSearchLabel.Text = "No search terms <br/> specified.";
					NormalSearchCriteria.Visible = false;
					ClearSearch.Visible = false;
				}
				break;
			case 2:
				NormalSearch.Visible = false;
				SearchingByAdvancedPanel.Visible = true;
				System.Text.StringBuilder sb = new System.Text.StringBuilder();
				if (AdvancedSearch.MaximumPrice != -1)
					sb.Append("max price = \"" + AdvancedSearch.MaximumPrice.ToString() + "\" <br/>");
				if (AdvancedSearch.Location.Length > 0)
					sb.Append("location = \"" + Server.HtmlEncode(AdvancedSearch.Location) + "\" <br/>");
				if (AdvancedSearch.AdType != 0)
					sb.Append("ad type = \"" + (AdType)AdvancedSearch.AdType + "\" <br/>");
				if (AdvancedSearch.MustHavePhotos)
					sb.Append("photo = \"" + AdvancedSearch.MustHavePhotos + "\" <br/>");
				if (AdvancedSearch.MemberName != String.Empty)
					sb.Append("Ads posted by <br/>\"" + AdvancedSearch.MemberName + "\"");
				if (AdvancedSearch.DayRange != -1)
				{
					int numDays = Convert.ToInt32(AdvancedSearch.DayRange);
					if (numDays == 1)
						sb.Append("Ads for the last day");
					else
						sb.Append(String.Format("Ads for the last {0} days", numDays));

				}
				AdvancedSearchCriteria.Text = sb.ToString();
				break;
			default:
				NormalSearch.Visible = false;
				SearchingByAdvancedPanel.Visible = false;
				break;
		}

	}
	protected void UpdateUI()
	{
		bool showSearchResults = false;
		if (_showCategoryBrowseForTopLevel)
			showSearchResults = true;
		else if (CategoryDropDown.CurrentCategoryId != DefaultValues.CategoryIdMinValue)
			showSearchResults = true;
		else if (!String.IsNullOrEmpty(SearchTermTextBox.Text))
			showSearchResults = true;


		if (showSearchResults)
		{
			// if search criteria were specified, show GridView with search results
			BrowsePanel.Visible = false;
			ResultsPanel.Visible = true;
			ResultsPanel.DataBind();
		}
		else
		{
			// if no search critieria were specified, show the regular browse category view (as on Default.aspx)
			BrowsePanel.Visible = true;
			ResultsPanel.Visible = false;
			BrowsePanel.DataBind();
		}
	}

	protected void CategoryPath_CategorySelectionChanged(object sender, CategorySelectionChangedEventArgs e)
	{
		ResetSearchCriteria(true, false, false);
		SetCurrentCategory(e.CategoryId);
	}

	protected void CategoryDropDown_CategorySelectionChanged(object sender, CategorySelectionChangedEventArgs e)
	{
		SetCurrentCategory(e.CategoryId);
	}

	protected void CategoryBrowse_CategorySelectionChanged(object sender, CategorySelectionChangedEventArgs e)
	{
		int categoryId = Convert.ToInt32(e.CategoryId);
		SetCurrentCategory(categoryId);
	}

	protected void SubcategoriesList_SelectedIndexChanged(object sender, EventArgs e)
	{
		if (SubcategoriesList.SelectedIndex != -1)
		{
			int categoryId = Convert.ToInt32(SubcategoriesList.SelectedValue);
			if (categoryId == -1)
			{
				ResetSearchCriteria(false, false, false);
				SetCurrentCategory(CategoryPath.CurrentParentCategoryId);
			}
			else if (categoryId > -1)
			{
				ResetSearchCriteria(false, false, false);
				SetCurrentCategory(categoryId);
			}
		}
	}

	protected void SubcategoriesList_DataBound(object sender, EventArgs e)
	{

		if (SubcategoriesList.Items.Count == 0)
		{
			SubcategoriesList.Items.Add(new ListItem("--No sub-categories. Go up one level.", "-1"));
		}
		else if (CategoryPath.CurrentCategoryId != CategoryPath.CurrentParentCategoryId)
		{
			SubcategoriesList.Items.Insert(0, new ListItem("--Go up one level.", "-1"));
		}

	}

	protected void SearchButton_Click(object sender, EventArgs e)
	{
		// when the Search button is clicked,
		// all search parameters except the current category (from dropdown)
		// and the search term are cleared
		ResetSearchCriteria(false, false, false);
		if (_advancedSearchInEffect)
			SetSearchMessage(2);
		else
			SetSearchMessage(1);

		UpdateUI();
	}

	protected void RemoveAdvancedSearch_Click(object sender, EventArgs e)
	{
		ResetSearchCriteria(false, false, true);
		SetSearchMessage(1);
	}

	protected void ClearSearch_Click(object sender, EventArgs e)
	{
		ResetSearchCriteria(true, false, true);
		SetSearchMessage(1);
	}

	protected void ResetSearchCriteria(bool resetSearchTerm, bool resetCategory, bool resetAdvancedSearch)
	{
		if (resetSearchTerm)
			SearchTermTextBox.Text = String.Empty;
		if (resetCategory)
			SetCurrentCategory(DefaultValues.CategoryIdMinValue);
		if (resetAdvancedSearch)
		{
			ViewState["advancedSearchInEffect"] = false;
			AdvancedSearch.ResetProperties(resetSearchTerm, resetCategory);
		}
	}
}