postadd.cs

ASP.NET简洁论坛源代码 这是一个简单的论坛

using System;
using System.Collections.Generic;
using System.Text;
using System.ComponentModel;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using NetFocus.Web.Core;

namespace NetFocus.Web.Applications.Forum
{
    public class PostAdd : UserControl, ICallbackEventHandler
    {
        protected ValuedEditor bodyEditor;
        protected ResourceButton saveButton;
        protected HiddenField targetControlIDHidden;
        protected HiddenField dataWrapperHidden;
        private Control targetControl;
        private string redirectString = "window.location='" + SiteUrls.Instance().Login + "';";

        public string DataWrapperID
        {
            get
            {
                string s = ViewState["DataWrapperID"] as string;
                if (s == null)
                {
                    s = string.Empty;
                }
                return s;
            }
            set
            {
                ViewState["DataWrapperID"] = value;
            }
        }
        public string TargetControlID
        {
            get
            {
                string s = ViewState["TargetControlID"] as string;
                if (s == null)
                {
                    s = string.Empty;
                }
                return s;
            }
            set
            {
                ViewState["TargetControlID"] = value;
            }
        }

        protected override void OnLoad(EventArgs e)
        {
            if (!Page.IsPostBack)
            {
                this.DataWrapperID = dataWrapperHidden.Value;
                this.TargetControlID = targetControlIDHidden.Value;
                saveButton.Attributes["onclick"] = string.Format("return addPost();");
                RegisterClientScripts();
            }
            else
            {
                targetControl = Globals.FindControl(this, TargetControlID);
            }
        }

        #region ICallbackEventHandler Implementation

        public void RaiseCallbackEvent(string postContent)
        {
            if (WebContext.Current.User.IsAnonymous)
            {
                return;
            }
            CreatePost(postContent);
            ((IUpdateData)targetControl).UpdateData();
        }
        public string GetCallbackResult()
        {
            string result;
            if (WebContext.Current.User.IsAnonymous)
            {
                result = redirectString;
            }
            else
            {
                result = Globals.RenderControl(targetControl);
            }
            return result;
        }

        #endregion

        private void CreatePost(string postContent)
        {
            Thread thread = BusinessManager.GetThread(RequestBuilder.BuildThreadOnlyRequest(WebContext.Current.EntityId)) as Thread;

            if (thread != null)
            {
                Post post = new Post();

                post.SectionId = thread.SectionId;
                post.ParentId = thread.EntityId;
                post.Body = postContent;
                post.AuthorId = WebContext.Current.User.UserId;
                post.Author = WebContext.Current.User.UserName;
                post.CreateDate = DateTime.Now;

                BusinessManager.CreatePost(post);

                thread.TotalPosts++;
                thread.MostRecentReplierId = WebContext.Current.User.UserId;
                thread.MostRecentReplierName = WebContext.Current.User.UserName;
                thread.UpdateDate = DateTime.Now;
                Entities.UpdateEntity(thread);
            }
        }
        private void RegisterClientScripts()
        {
            //Important: 如果是用FCKEditor作为编辑器，则应该用这句代码
            //string addPostScript = "function addPost() { var editor = FCKeditorAPI.GetInstance('" + this.bodyEditor.EditorClientID + "'); var content = editor.GetXHTML(true); var strContent = content.toText().Trim(); if(strContent==null||strContent==\"\") { alert('内容不能为空'); return false; } CallServer(content,'" + DataWrapperID + "'); return false; }";
            
            //下面这句代码是针对tinyMCE的
            string addPostScript = "function addPost() { var content = tinyMCE.getInstanceById('" + this.bodyEditor.EditorClientID + "').getBody().innerHTML; var strContent = content.toText().Trim(); if(strContent==null||strContent==\"\") { alert('内容不能为空'); return false; } CallServer(content,'" + DataWrapperID + "'); return false; }";
            string receiveCallBackScript = "function ReceiveCallback(arg,context){ if (arg == \"" + redirectString + "\") " + redirectString + " else document.getElementById(context).innerHTML = arg; }";
            string callbackReference = Page.ClientScript.GetCallbackEventReference(this, "arg", "ReceiveCallback", "context", false);

            Page.ClientScript.RegisterClientScriptBlock(this.GetType(), this.ClientID + "AddPostScript", addPostScript, true);
            Page.ClientScript.RegisterClientScriptBlock(this.GetType(), this.ClientID + "ReceiveCallBackScript", receiveCallBackScript, true);
            Page.ClientScript.RegisterClientScriptBlock(this.GetType(), this.ClientID + "CallServer", string.Format("function CallServer(arg,context){{ {0} }}", callbackReference), true);
        }

    }
}