library.aspx.cs

数字图书馆网站

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Configuration;

namespace DigitalLibrary
{
	/// <summary>
	/// Summary description for Library.
	/// </summary>
	public class Library : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.Label lblTitle;
		protected System.Web.UI.WebControls.LinkButton lbUploadNew;
		protected System.Data.SqlClient.SqlDataAdapter sqlDataAdapter1;
		protected System.Data.SqlClient.SqlConnection sqlConnection1;
		protected DigitalLibrary.ArticlesDS articlesDS1;
		protected System.Web.UI.WebControls.DataGrid dgArticles;
		protected System.Web.UI.WebControls.DropDownList ddlCategory;
		protected DigitalLibrary.Abstract cusAbstract;
		protected System.Web.UI.HtmlControls.HtmlInputText NoArticles;
		protected System.Data.SqlClient.SqlCommand sqlSelectCommand1;
		protected System.Data.SqlClient.SqlCommand sqlInsertCommand1;
		protected System.Data.SqlClient.SqlCommand sqlUpdateCommand1;
		protected System.Data.SqlClient.SqlCommand sqlDeleteCommand1;
		protected System.Web.UI.WebControls.Button btnBack;
		
		
		public DataView objView;
	
		private void Page_Load(object sender, System.EventArgs e)
		{
			objView = new DataView();
			if (!Page.IsPostBack)
			{
				try
				{
					SqlConnection objConnection = new SqlConnection(ConfigurationSettings.AppSettings["DatabaseConnection"]);
					SqlDataAdapter objAdapter = new SqlDataAdapter("SELECT Category,CategoryID FROM Category ORDER BY CategoryID",objConnection);
					DataSet objDataSet = new DataSet();
					objAdapter.Fill(objDataSet,"Category");
					objConnection.Close();
					this.ddlCategory.DataSource=objDataSet.Tables["Category"];
					this.ddlCategory.DataTextField="Category";
					this.ddlCategory.DataValueField="CategoryID";
					this.ddlCategory.DataBind();
					this.sqlDataAdapter1.Fill(this.articlesDS1,"Articles");
					objView = this.articlesDS1.Tables["Articles"].DefaultView;
					Session["objView"] = objView;
					objAdapter = new SqlDataAdapter("SELECT MemberId FROM Members WHERE MemberID = '"+ Convert.ToString(Session["Login"]) +"'" ,objConnection);
					objDataSet = new DataSet();
					objAdapter.Fill(objDataSet,"Members");
					if (objDataSet.Tables["Members"].Rows.Count > 0)
						this.lbUploadNew.Visible = true;
					else
						this.lbUploadNew.Visible = false;
				}
				catch(Exception ex)
				{
					Response.Write(ex.Message.ToString());
				}

			}
			else
			{
				objView = (DataView)Session["objView"];
			}
			this.dgArticles.DataSource=objView;
			this.dgArticles.DataBind();
			
			//Get total article number
			int totalArticles;
			SqlConnection objConn = new SqlConnection(ConfigurationSettings.AppSettings["DatabaseConnection"]);
			SqlCommand objCommand = new SqlCommand("Select Count(ArticleID) FROM Articles",objConn);
			objConn.Open();
			totalArticles = (int)objCommand.ExecuteScalar();
			objConn.Close();
			NoArticles.Value = totalArticles.ToString();
			this.NoArticles.Value = this.NoArticles.Value + " Articles";
		}

		#region Web Form Designer generated code
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: This call is required by the ASP.NET Web Form Designer.
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{    
			this.sqlDataAdapter1 = new System.Data.SqlClient.SqlDataAdapter();
			this.sqlDeleteCommand1 = new System.Data.SqlClient.SqlCommand();
			this.sqlConnection1 = new System.Data.SqlClient.SqlConnection();
			this.sqlInsertCommand1 = new System.Data.SqlClient.SqlCommand();
			this.sqlSelectCommand1 = new System.Data.SqlClient.SqlCommand();
			this.sqlUpdateCommand1 = new System.Data.SqlClient.SqlCommand();
			this.articlesDS1 = new DigitalLibrary.ArticlesDS();
			((System.ComponentModel.ISupportInitialize)(this.articlesDS1)).BeginInit();
			this.btnBack.Click += new System.EventHandler(this.btnBack_Click);
			this.ddlCategory.SelectedIndexChanged += new System.EventHandler(this.ddlCategory_SelectedIndexChanged);
			this.lbUploadNew.Click += new System.EventHandler(this.UploadNew_Click);
			this.dgArticles.PageIndexChanged += new System.Web.UI.WebControls.DataGridPageChangedEventHandler(this.dgArticles_PageIndexChanged);
			this.dgArticles.ItemDataBound += new System.Web.UI.WebControls.DataGridItemEventHandler(this.dgArticles_ItemDataBound);
			// 
			// sqlDataAdapter1
			// 
			this.sqlDataAdapter1.DeleteCommand = this.sqlDeleteCommand1;
			this.sqlDataAdapter1.InsertCommand = this.sqlInsertCommand1;
			this.sqlDataAdapter1.SelectCommand = this.sqlSelectCommand1;
			this.sqlDataAdapter1.TableMappings.AddRange(new System.Data.Common.DataTableMapping[] {
																									  new System.Data.Common.DataTableMapping("Table", "Articles", new System.Data.Common.DataColumnMapping[] {
																																																				  new System.Data.Common.DataColumnMapping("ArticleID", "ArticleID"),
																																																				  new System.Data.Common.DataColumnMapping("Category", "Category"),
																																																				  new System.Data.Common.DataColumnMapping("FileName", "FileName"),
																																																				  new System.Data.Common.DataColumnMapping("Rating", "Rating"),
																																																				  new System.Data.Common.DataColumnMapping("Status", "Status"),
																																																				  new System.Data.Common.DataColumnMapping("PostedBy", "PostedBy"),
																																																				  new System.Data.Common.DataColumnMapping("Abstract", "Abstract"),
																																																				  new System.Data.Common.DataColumnMapping("Comments", "Comments")})});
			this.sqlDataAdapter1.UpdateCommand = this.sqlUpdateCommand1;
			// 
			// sqlDeleteCommand1
			// 
			this.sqlDeleteCommand1.CommandText = "DELETE FROM Articles WHERE (ArticleID = @Original_ArticleID)";
			this.sqlDeleteCommand1.Connection = this.sqlConnection1;
			this.sqlDeleteCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@Original_ArticleID", System.Data.SqlDbType.Int, 4, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "ArticleID", System.Data.DataRowVersion.Original, null));
			// 
			// sqlConnection1
			// 
			this.sqlConnection1.ConnectionString =ConfigurationSettings.AppSettings["DatabaseConnection"];
			// 
			// sqlInsertCommand1
			// 
			this.sqlInsertCommand1.CommandText = "INSERT INTO Articles(ArticleID, FileName, PostedBy) VALUES (@ArticleID, @FileName" +
				", @PostedBy)";
			this.sqlInsertCommand1.Connection = this.sqlConnection1;
			this.sqlInsertCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@ArticleID", System.Data.SqlDbType.Int, 4, "ArticleID"));
			this.sqlInsertCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@FileName", System.Data.SqlDbType.VarChar, 50, "FileName"));
			this.sqlInsertCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@PostedBy", System.Data.SqlDbType.VarChar, 30, "PostedBy"));
			// 
			// sqlSelectCommand1
			// 
			this.sqlSelectCommand1.CommandText = @"SELECT Articles.ArticleID, ISNULL(Category.Category, 'NULL') AS Category, Articles.FileName, ISNULL(Articles.Rating, 'Not Yet Assigned') AS Rating, ISNULL(Articles.Status, 'Null') AS Status, Articles.PostedBy, 'Abstract' AS Abstract, 'Post/Read' AS Comments FROM Articles LEFT OUTER JOIN Category ON Articles.CategoryID = Category.CategoryID";
			this.sqlSelectCommand1.Connection = this.sqlConnection1;
			// 
			// sqlUpdateCommand1
			// 
			this.sqlUpdateCommand1.CommandText = "UPDATE Articles SET ArticleID = @ArticleID, FileName = @FileName, PostedBy = @Pos" +
				"tedBy WHERE (ArticleID = @Original_ArticleID)";
			this.sqlUpdateCommand1.Connection = this.sqlConnection1;
			this.sqlUpdateCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@ArticleID", System.Data.SqlDbType.Int, 4, "ArticleID"));
			this.sqlUpdateCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@FileName", System.Data.SqlDbType.VarChar, 50, "FileName"));
			this.sqlUpdateCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@PostedBy", System.Data.SqlDbType.VarChar, 30, "PostedBy"));
			this.sqlUpdateCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@Original_ArticleID", System.Data.SqlDbType.Int, 4, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "ArticleID", System.Data.DataRowVersion.Original, null));
			// 
			// articlesDS1
			// 
			this.articlesDS1.DataSetName = "ArticlesDS";
			this.articlesDS1.Locale = new System.Globalization.CultureInfo("en-US");
			this.Load += new System.EventHandler(this.Page_Load);
			((System.ComponentModel.ISupportInitialize)(this.articlesDS1)).EndInit();

		}
		#endregion


		private void UploadNew_Click(object sender, System.EventArgs e)
		{
			Response.Redirect("Upload.aspx");
		}

		private void dgArticles_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
		{
			if (e.Item.ItemType == System.Web.UI.WebControls.ListItemType.Item || e.Item.ItemType == System.Web.UI.WebControls.ListItemType.AlternatingItem)
			{
				if (e.Item.Cells[1].Text == "NULL")
				{
					e.Item.Cells[1].Text = "Not Yet Categorized";
					e.Item.Cells[1].Font.Size = 7;
					e.Item.Cells[1].ForeColor = System.Drawing.Color.Green;
				}
				if (e.Item.Cells[3].Text == "Not Y")
				{
					e.Item.Cells[3].Text = "Not Yet Assigned";
					e.Item.Cells[3].Font.Size = 7;
					e.Item.Cells[3].ForeColor = System.Drawing.Color.Green;
				}
				if (e.Item.Cells[4].Text.ToUpper() == "NULL")
				{
					e.Item.Cells[4].Text = "尚未指定";
					e.Item.Cells[4].Font.Size = 7;
					e.Item.Cells[4].ForeColor = System.Drawing.Color.Green;
				}
				TableCell FileName = (TableCell) e.Item.Cells[2];
				HyperLink FileNameHL = new HyperLink();
				FileNameHL.Text = FileName.Text;
				if (e.Item.Cells[4].Text.ToLower() == "免费" || e.Item.Cells[4].Text == "尚未指定")
				{
					FileNameHL.NavigateUrl = ConfigurationSettings.AppSettings["AttachmentsURL"]+FileName.Text;
					FileNameHL.Target = "_blank";
				}
				else
				{
					SqlConnection objConnection = new SqlConnection(ConfigurationSettings.AppSettings["DatabaseConnection"]);
					
					SqlDataAdapter objAdapter = new SqlDataAdapter("SELECT ArticleID FROM ArticlesPurchased WHERE ArticleID = "+e.Item.Cells[0].Text+" AND LoginID = '"+Convert.ToString(Session["Login"])+"'",objConnection);
					DataSet objDataSet = new DataSet();
					objAdapter.Fill(objDataSet,"ArticleCheck");
					if (objDataSet.Tables["ArticleCheck"].Rows.Count>0)
					{
						FileNameHL.NavigateUrl = ConfigurationSettings.AppSettings["AttachmentsURL"]+FileName.Text;
						FileNameHL.Target = "_blank";
					}
					else
					{
						FileNameHL.NavigateUrl =ConfigurationSettings.AppSettings["ApplicationRoot"]+"Pay.aspx?ArticleID="+e.Item.Cells[0].Text + "&Login="+Convert.ToString(Session["Login"]);
					}
				}
				FileName.Controls.Add(FileNameHL);
				TableCell Comments = (TableCell)e.Item.Cells[7];
				HyperLink hlComments = new HyperLink();
				hlComments.Text=Comments.Text;
				hlComments.NavigateUrl=ConfigurationSettings.AppSettings["ApplicationRoot"]+"Comments.aspx?ArticleID="+e.Item.Cells[0].Text+"&LoginID="+Convert.ToString(Session["Login"]);
				Comments.Controls.Add(hlComments);
				TableCell Abstract = (TableCell) e.Item.Cells[6];
				LinkButton AbstractLB = new LinkButton();
				AbstractLB.Text = "Abstract";
				AbstractLB.ID=((TableCell)e.Item.Controls[0]).Text;
				AbstractLB.Click += new System.EventHandler(this.AbstractClick);
				Abstract.Controls.Add(AbstractLB);
			}
		}

		private void ddlCategory_SelectedIndexChanged(object sender, System.EventArgs e)
		{
			objView = new DataView();
			if (this.ddlCategory.SelectedItem.Text!="<Choose a Category>")
			{				
				objView = (DataView)Session["objView"];
				objView.RowFilter= "Category = '"+this.ddlCategory.SelectedItem.Text+"'";
			}
			else
			{
				sqlDataAdapter1.Fill(this.articlesDS1,"Articles");
				objView = this.articlesDS1.Tables["Articles"].DefaultView;
			}
			dgArticles.DataSource=objView;
			dgArticles.DataBind();
			Session["objView"]=objView;
		}

		private void dgArticles_PageIndexChanged(object source, System.Web.UI.WebControls.DataGridPageChangedEventArgs e)
		{
			this.dgArticles.CurrentPageIndex=e.NewPageIndex;
			this.dgArticles.DataBind();
		}

		public void AbstractClick(object sender, System.EventArgs e)
		{
			int AbstractID = Convert.ToInt32(sender.GetType().GetProperty("ID").GetValue(sender,null));
			SqlConnection objConnection = new SqlConnection(ConfigurationSettings.AppSettings["DatabaseConnection"]);
			SqlDataAdapter objAdapter = new SqlDataAdapter("SELECT Abstract FROM Articles WHERE ArticleID = "+AbstractID,objConnection);
			DataSet objDataSet = new DataSet();
			objAdapter.Fill(objDataSet,"Abstract");
			objConnection.Close();
			this.cusAbstract.AbstractText = objDataSet.Tables["Abstract"].Rows[0][0].ToString();
			this.cusAbstract.Visible=true;
		}

		private void btnBack_Click(object sender, System.EventArgs e)
		{
			Response.Redirect("Home.aspx");
		}


	}
}