sendnewsletter.aspx.cs

wrox c#高级编程

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
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.Web.Mail;
using Wrox.WebModules.Accounts.Business;


namespace Wrox.WebModules.MailingLists.Web
{
	/// <summary>
	/// Summary description for SendNewsletter.
	/// </summary>
	public class SendNewsletter : Wrox.ThePhile.Web.PhilePage
	{
		protected System.Web.UI.WebControls.Button Send;
		protected System.Web.UI.WebControls.Button Preview;
		protected System.Web.UI.WebControls.Table TableMailBody;
		protected System.Web.UI.WebControls.Table TableMailSettings;
		protected System.Web.UI.WebControls.TextBox Subject;
		protected System.Web.UI.WebControls.DropDownList PriorityDropDown;
		protected System.Web.UI.WebControls.DropDownList FormatDropDown;
		protected System.Web.UI.WebControls.TextBox Body;
		protected System.Web.UI.WebControls.DropDownList ListsDropDown;
		protected System.Web.UI.WebControls.CheckBox ArchiveNewsletter;
		protected System.Web.UI.WebControls.Label MsgPreview;
			
		protected void Page_Load(object sender, EventArgs e)
		{		
			// check if the current user is allowed to send out a newsletter
			if (!Context.User.Identity.IsAuthenticated || 
				!((SitePrincipal)Context.User).HasPermission((int)MailingListsPermissions.SendNewsletter))
			{
				// if not, redirect to the Login page
				Response.Redirect("/ThePhile/Modules/Users/Login.aspx?ShowError=true", true);
			}

			// get the ListID param from QueryString
			string listID = Request.Params["ListID"];
			
			if (!Page.IsPostBack)
			{
				// load all the lists name in the DropDown control
				ListsDropDown.DataSource = Business.List.GetLists().Tables[0].DefaultView;

				// retrieve the subject and signature settings, and set as values for the textboxes
				Configuration.ModuleSettings settings = Configuration.ModuleConfig.GetSettings();
				Subject.Text = settings.NewsSubject;
				Body.Text = settings.Signature;
				Page.DataBind();

				// select the DropDown element according to the ListID value in the QueryString
				if (listID!=null)
				{
					ListsDropDown.SelectedIndex = ListsDropDown.Items.IndexOf(
						ListsDropDown.Items.FindByValue(listID));
				}
			}

		}


		protected void Preview_Click(object sender, EventArgs e)
		{
			string msgText = Body.Text;
			int listID = int.Parse(ListsDropDown.SelectedItem.Value);
			
			// replace the list's and settings special tags with their values
			msgText = Business.Helper.ProcessListTags(msgText, listID); 
			msgText = Business.Helper.ProcessSettingsTags(msgText);
        	
			// encode the body if the format is not HTML
			if (FormatDropDown.SelectedIndex==0)
			{
				msgText = HttpUtility.HtmlEncode(msgText);
				// replace the new lines with <br>, to show the new lines in the Label
				msgText = msgText.Replace("\n", "<br>");
				// remove carriage returns
				msgText = msgText.Replace("\r", "");
			}
        	
			// show the body in the preview label
			MsgPreview.Text = msgText;
			MsgPreview.Visible = true;
		}


		protected void Send_Click(object sender, EventArgs e)
		{
			Server.ScriptTimeout = 3600; 
					
			// send the newsletter and eventually save it to the DB
			int numSent;
			Business.List list = new Business.List(int.Parse(ListsDropDown.SelectedItem.Value));
			list.SendNewsletter(Subject.Text, Body.Text, (FormatDropDown.SelectedIndex==1), 
					(MailPriority)PriorityDropDown.SelectedIndex, ArchiveNewsletter.Checked, out numSent);

			// show the number of sent mails
			MsgPreview.Text = string.Format("<b>{0} mail(s) have been sent</b>", numSent);
			// if the newsletter has been archived, say this
			if (ArchiveNewsletter.Checked)
				MsgPreview.Text += "<br><b>The newsletter has been archived</b>";
			MsgPreview.Visible = true;
		}

	
		#region Web Form Designer generated code
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: This call is required by the ASP.NET Web Form Designer.
			//
			base.OnInit(e);
			InitializeComponent();
			
		}
		
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{    
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion
	}
}