MailDefinition.cs source code in C# .NET

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Code:

                         / DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / UI / WebControls / MailDefinition.cs / 1 / MailDefinition.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Web.UI.WebControls { 
 
    using System.Security.Permissions;
    using System.Net.Mail; 
    using System.Net.Mime;
    using System.Collections;
    using System.ComponentModel;
    using System.IO; 
    using System.Drawing.Design;
    using System.Text.RegularExpressions; 
    using System.Web; 
    using System.Web.Util;
    using System.Text; 
    using System.Web.Configuration;
    using System.Configuration;

    ///  
    /// Defines an email message.  Smaller object model than System.Net.Mail.MailMessage.  Creates a MailMessage
    /// from a string or a file containing the message body.  Can perform textual substitutions in the message body 
    /// when given a dictionary mapping strings to their replacements. 
    /// 
    [ 
    Bindable(false),
    TypeConverterAttribute(typeof(EmptyStringExpandableObjectConverter)),
    ParseChildren(true, "")
    ] 
    [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)]
    public sealed class MailDefinition : IStateManager { 
        private bool _isTrackingViewState; 
        private StateBag _viewState;
        private EmbeddedMailObjectsCollection _embeddedObjects; 
        private string _bodyFileName;

        /// 
        /// The file that contains the body of the e-mail message. 
        /// 
        [ 
        WebCategory("Behavior"), 
        DefaultValue(""),
        WebSysDescription(SR.MailDefinition_BodyFileName), 
        Editor("System.Web.UI.Design.WebControls.MailDefinitionBodyFileNameEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)),
        UrlProperty("*.*"),
        NotifyParentProperty(true)
        ] 
        public string BodyFileName {
            get { 
                return (_bodyFileName == null) ? String.Empty : _bodyFileName; 
            }
            set { 
                _bodyFileName = value;
            }
        }
 

        ///  
        /// A semicolon-delimited list of e-mail addresses that receive a carbon copy (CC) of the e-mail message. 
        /// 
        [ 
        WebCategory("Behavior"),
        DefaultValue(""),
        WebSysDescription(SR.MailDefinition_CC),
        NotifyParentProperty(true) 
        ]
        public string CC { 
            get { 
                object obj = ViewState["CC"];
                return (obj == null) ? String.Empty : (string)obj; 
            }
            set {
                ViewState["CC"] = value;
            } 
        }
 
        //  
        /// 
        /// The sender's e-mail address. 
        /// 
        [
        WebCategory("Behavior"),
        DefaultValue(""), 
        WebSysDescription(SR.MailDefinition_From),
        NotifyParentProperty(true) 
        ] 
        public string From {
            get { 
                object obj = ViewState["From"];
                return (obj == null) ? String.Empty : (string)obj;
            }
            set { 
                ViewState["From"] = value;
            } 
        } 

 
        /// 
        /// Embedded mail objects
        /// 
        [ 
        DefaultValue(null),
        NotifyParentProperty(true), 
        PersistenceMode(PersistenceMode.InnerProperty), 
        WebCategory("Behavior"),
        WebSysDescription(SR.MailDefinition_EmbeddedObjects), 
        ]
        public EmbeddedMailObjectsCollection EmbeddedObjects {
            get {
                if (_embeddedObjects == null) { 
                    _embeddedObjects = new EmbeddedMailObjectsCollection();
                } 
                return _embeddedObjects; 
            }
        } 

        [
        WebCategory("Behavior"),
        DefaultValue(false), 
        WebSysDescription(SR.MailDefinition_IsBodyHtml),
        NotifyParentProperty(true) 
        ] 
        public bool IsBodyHtml {
            get { 
                object obj = ViewState["IsBodyHtml"];
                return (obj == null) ? false : (bool)obj;
            }
            set { 
                ViewState["IsBodyHtml"] = value;
            } 
        } 

        [ 
        WebCategory("Behavior"),
        DefaultValue(MailPriority.Normal),
        WebSysDescription(SR.MailDefinition_Priority),
        NotifyParentProperty(true) 
        ]
        public MailPriority Priority { 
            get { 
                object obj = ViewState["Priority"];
                return (obj == null) ? MailPriority.Normal : (MailPriority) obj; 
            }
            set {
                if (value < MailPriority.Normal || value > MailPriority.High) {
                    throw new ArgumentOutOfRangeException("value"); 
                }
                ViewState["Priority"] = value; 
            } 
        }
 

        /// 
        /// The subject line of the e-mail message.
        ///  
        [
        WebCategory("Behavior"), 
        DefaultValue(""), 
        WebSysDescription(SR.MailDefinition_Subject),
        NotifyParentProperty(true) 
        ]
        public string Subject {
            get {
                object obj = ViewState["Subject"]; 
                return (obj == null) ? String.Empty : (string)obj;
            } 
            set { 
                ViewState["Subject"] = value;
            } 
        }

        //
        internal string SubjectInternal { 
            get {
                return (string)ViewState["Subject"]; 
            } 
        }
 
        /// 
        /// Manages the viewstate for this class, since we don't extend Control.
        /// 
        [ 
        Browsable(false),
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden) 
        ] 
        private StateBag ViewState {
            get { 
                if (_viewState == null) {
                    _viewState = new StateBag(false);
                    if (_isTrackingViewState) {
                        ((IStateManager)_viewState).TrackViewState(); 
                    }
                } 
                return _viewState; 
            }
        } 


        /// 
        /// Creates a MailMessage using the BodyFileName property. 
        /// 
        public MailMessage CreateMailMessage(string recipients, IDictionary replacements, Control owner) { 
            if (owner == null) { 
                throw new ArgumentNullException("owner");
            } 

            string body = String.Empty;
            string bodyFileName = BodyFileName;
            if (!String.IsNullOrEmpty(bodyFileName)) { 
                string path = bodyFileName;
                if (!UrlPath.IsAbsolutePhysicalPath(path)) { 
                    // Relative so we need to add the template source directory to the path 
                    path = UrlPath.Combine(owner.AppRelativeTemplateSourceDirectory, path);
                } 

                TextReader reader = new StreamReader(owner.OpenFile(path));
                try {
                    body = reader.ReadToEnd(); 
                }
                finally { 
                    reader.Close(); 
                }
            } 
            return CreateMailMessage(recipients, replacements, body, owner);
        }

 
        /// 
        /// Creates a MailMessage using the body parameter. 
        ///  
        public MailMessage CreateMailMessage(string recipients, IDictionary replacements, string body, Control owner) {
            if (owner == null) { 
                throw new ArgumentNullException("owner");
            }

            string from = From; 
            if (String.IsNullOrEmpty(from)) {
                System.Net.Configuration.SmtpSection smtpSection = RuntimeConfig.GetConfig().Smtp; 
                if (smtpSection == null || smtpSection.Network == null || String.IsNullOrEmpty(smtpSection.From)) { 
                    throw new HttpException(SR.GetString(SR.MailDefinition_NoFromAddressSpecified));
                } 
                else {
                    from = smtpSection.From;
                }
            } 

            MailMessage message = null; 
            try { 
                message = new MailMessage(from, recipients);
                if (!String.IsNullOrEmpty(CC)) { 
                    message.CC.Add(CC);
                }
                if (!String.IsNullOrEmpty(Subject)) {
                    message.Subject = Subject; 
                }
 
                message.Priority = Priority; 

                if (replacements != null && !String.IsNullOrEmpty(body)) { 
                    foreach (object key in replacements.Keys) {
                        string fromString = key as string;
                        string toString = replacements[key] as string;
 
                        if ((fromString == null) || (toString == null)) {
                            throw new ArgumentException(SR.GetString(SR.MailDefinition_InvalidReplacements)); 
                        } 
                        body = Regex.Replace(body, fromString, toString, RegexOptions.IgnoreCase);
                    } 
                }
                // If there are any embedded objects, we need to construct an alternate view with text/html
                // And add all of the embedded objects as linked resouces
                if (EmbeddedObjects.Count > 0) { 
                    string viewContentType = (IsBodyHtml ? MediaTypeNames.Text.Html : MediaTypeNames.Text.Plain);
                    AlternateView view = AlternateView.CreateAlternateViewFromString(body, null, viewContentType); 
                    foreach (EmbeddedMailObject part in EmbeddedObjects) { 
                        string path = part.Path;
                        if (String.IsNullOrEmpty(path)) { 
                            throw ExceptionUtil.PropertyNullOrEmpty("EmbeddedMailObject.Path");
                        }
                        if (!UrlPath.IsAbsolutePhysicalPath(path)) {
                            VirtualPath virtualPath = VirtualPath.Combine(owner.TemplateControlVirtualDirectory, 
                                VirtualPath.Create(path));
                            path = virtualPath.AppRelativeVirtualPathString; 
                        } 

                        // The FileStream will be closed by MailMessage.Dispose() 
                        LinkedResource lr = null;
                        try {
                            Stream stream = null;
                            try { 
                                stream = owner.OpenFile(path);
                                lr = new LinkedResource(stream); 
                            } 
                            catch {
                                if (stream != null) { 
                                    ((IDisposable)stream).Dispose();
                                }
                                throw;
                            } 
                            lr.ContentId = part.Name;
                            lr.ContentType.Name = UrlPath.GetFileName(path); 
                            view.LinkedResources.Add(lr); 
                        }
                        catch { 
                            if (lr != null) {
                                lr.Dispose();
                            }
                            throw; 
                        }
                    } 
                    message.AlternateViews.Add(view); 
                }
                else if (!String.IsNullOrEmpty(body)) { 
                    message.Body = body;
                }

                message.IsBodyHtml = IsBodyHtml; 
                return message;
            } 
            catch { 
                if (message != null) {
                    message.Dispose(); 
                }
                throw;
            }
        } 

        #region IStateManager implementation 
        ///  
        bool IStateManager.IsTrackingViewState {
            get { 
                return _isTrackingViewState;
            }
        }
 
        /// 
        void IStateManager.LoadViewState(object savedState) { 
            if (savedState != null) { 
                ((IStateManager)ViewState).LoadViewState(savedState);
            } 
        }

        /// 
        object IStateManager.SaveViewState() { 
            if (_viewState != null) {
                return ((IStateManager)_viewState).SaveViewState(); 
            } 
            return null;
        } 

        /// 
        void IStateManager.TrackViewState() {
            _isTrackingViewState = true; 
            if (_viewState != null) {
                ((IStateManager)_viewState).TrackViewState(); 
            } 
        }
        #endregion 
    }
}

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