已完成聊天交流平台的服务端消息缓存，测试缓存200条。

软件系统客户端模版/FormMainWindow.Designer.cs

@@ -43,6 +43,7 @@
             this.账户管理ToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
             this.远程更新ToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
             this.注册账号ToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
+            this.消息发送ToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
             this.设置ToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
             this.修改密码ToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
             this.留言板ToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
@@ -75,7 +76,6 @@
             this.panel_left = new System.Windows.Forms.Panel();
             this.label10 = new System.Windows.Forms.Label();
             this.panel_main = new System.Windows.Forms.Panel();
-            this.消息发送ToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
             this.statusStrip1.SuspendLayout();
             this.menuStrip1.SuspendLayout();
             this.panel_right.SuspendLayout();
@@ -206,6 +206,13 @@
             this.注册账号ToolStripMenuItem.Text = "注册账号";
             this.注册账号ToolStripMenuItem.Click += new System.EventHandler(this.注册账号ToolStripMenuItem_Click);
             // 
+            // 消息发送ToolStripMenuItem
+            // 
+            this.消息发送ToolStripMenuItem.Name = "消息发送ToolStripMenuItem";
+            this.消息发送ToolStripMenuItem.Size = new System.Drawing.Size(164, 32);
+            this.消息发送ToolStripMenuItem.Text = "消息发送";
+            this.消息发送ToolStripMenuItem.Click += new System.EventHandler(this.消息发送ToolStripMenuItem_Click);
+            // 
             // 设置ToolStripMenuItem
             // 
             this.设置ToolStripMenuItem.DropDownItems.AddRange(new System.Windows.Forms.ToolStripItem[] {
@@ -519,13 +526,6 @@
             this.panel_main.Size = new System.Drawing.Size(557, 419);
             this.panel_main.TabIndex = 5;
             // 
-            // 消息发送ToolStripMenuItem
-            // 
-            this.消息发送ToolStripMenuItem.Name = "消息发送ToolStripMenuItem";
-            this.消息发送ToolStripMenuItem.Size = new System.Drawing.Size(164, 32);
-            this.消息发送ToolStripMenuItem.Text = "消息发送";
-            this.消息发送ToolStripMenuItem.Click += new System.EventHandler(this.消息发送ToolStripMenuItem_Click);
-            // 
             // FormMainWindow
             // 
             this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);

软件系统客户端模版/FormMainWindow.cs

@@ -331,10 +331,14 @@ namespace 软件系统客户端模版
                 //收到服务器的数据
                 JObject json = JObject.Parse(data);
                 UserClient.DateTimeServer = json["Time"].ToObject<DateTime>();
+                List<string> chats = JArray.Parse(json["chats"].ToString()).ToObject<List<string>>();
+                StringBuilder sb = new StringBuilder();
+                chats.ForEach(m => { sb.Append(m + Environment.NewLine); });
                 if (IsHandleCreated) Invoke(new Action(() =>
                 {
                     toolStripStatusLabel_time.Text = UserClient.DateTimeServer.ToString("yyyy-MM-dd HH:mm");
                     label_file_count.Text = json["FileCount"].ToObject<int>().ToString();
+                    UIControls_Chat.AddChatsHistory(sb.ToString());
                 }));
             }
             else if (customer == CommonHeadCode.MultiNetHeadCode.文件总数量)

软件系统客户端模版/UIControls/OnlineChatRender.cs

@@ -41,6 +41,14 @@ namespace 软件系统客户端模版.UIControls
         {
            richTextBox1.AppendText(str + Environment.NewLine);
         }
+        /// <summary>
+        /// 新增聊天的历史记录
+        /// </summary>
+        /// <param name="str"></param>
+        public void AddChatsHistory(string str)
+        {
+            richTextBox1.Text = str;
+        }
 
         public void InputFocus()
         {

软件系统服务端模版/FormServerWindow.Designer.cs

@@ -16,6 +16,7 @@
             //紧急存储数据
             UserServer.ServerSettings.SaveToFile();
             UserServer.ServerAccounts.SaveToFile();
+            Chats_Managment.SaveToFile();
 
             if (disposing && (components != null))
             {

软件系统服务端模版/FormServerWindow.cs

@@ -98,6 +98,8 @@ namespace 软件系统服务端模版
             UserServer.ServerAccounts.FileSavePath = Application.StartupPath + @"\accounts.txt";
             UserServer.ServerAccounts.LoadByFile();
             UserServer.ServerAccounts.LogHelper = RuntimeLogHelper;
+            //初始化聊天信息
+            ChatInitialization();
         }
         private void Form1_FormClosing(object sender, FormClosingEventArgs e)
         {
@@ -385,8 +387,10 @@ namespace 软件系统服务端模版
             }
             else if (customer == CommonHeadCode.SimplifyHeadCode.参数下载)
             {
-                Newtonsoft.Json.Linq.JObject json = new Newtonsoft.Json.Linq.JObject();
+                JObject json = new JObject
-                json.Add(nameof(UserServer.ServerSettings.Announcement), new Newtonsoft.Json.Linq.JValue(UserServer.ServerSettings.Announcement));
+                {
+                    { nameof(UserServer.ServerSettings.Announcement), new JValue(UserServer.ServerSettings.Announcement) }
+                };
                 net_simplify_server.SendMessage(state, customer, json.ToString());
             }
             else if (customer == CommonHeadCode.SimplifyHeadCode.账户检查)
@@ -636,9 +640,7 @@ namespace 软件系统服务端模版
         {
             if (customer == CommonHeadCode.MultiNetHeadCode.留言版消息)
             {
-                string content = state.LoginAlias + DateTime.Now.ToString(" yyyy-MM-dd HH:mm:ss") + Environment.NewLine + data;
+                ChatAddMessage(state.LoginAlias, data);
-                //转发所有的客户端，包括发送者
-                net_socket_server.SendAllClients(customer, content);
             }
         }
 
@@ -672,13 +674,15 @@ namespace 软件系统服务端模版
             JObject json = new JObject
             {
                 { "Time", new JValue(DateTime.Now) },
-                { "FileCount", new JValue(net_simple_file_server.File_Count()) }
+                { "FileCount", new JValue(net_simple_file_server.File_Count()) },
+                { "chats", new JValue(Chats_Managment.ToSaveString())}
             };
             //发送客户端的初始化数据
             net_socket_server.Send(object1, CommonHeadCode.MultiNetHeadCode.初始化数据,  json.ToString());
             //触发上下线功能
             Net_socket_clients_change(DateTime.Now.ToString("MM-dd HH:mm:ss ") + object1._IpEnd_Point.Address.ToString() + "：" +
                         object1.LoginAlias + " 上线");
+            ChatAddMessage(object1.LoginAlias + " 上线");
         }
 
 
@@ -982,6 +986,25 @@ namespace 软件系统服务端模版
             Chats_Managment.LoadByFile();//加载以前的数据
         }
 
+        private void ChatAddMessage(string user,string message)
+        {
+            string content = "\u0002" + user + DateTime.Now.ToString(" yyyy-MM-dd HH:mm:ss") + Environment.NewLine + " " + message;
+            //转发所有的客户端，包括发送者
+            net_socket_server.SendAllClients(CommonHeadCode.MultiNetHeadCode.留言版消息, content);
+            //添加缓存
+            Chats_Managment.AddNewItem(content);
+        }
+
+
+        /// <summary>
+        /// 如果需要发送一些系统自己的消息，请调用这个方法。
+        /// 一般来说将系统消息和用户聊天消息进行区分
+        /// </summary>
+        /// <param name="message">消息</param>
+        private void ChatAddMessage(string message)
+        {
+            ChatAddMessage("[系统]", message);
+        }
 
         #endregion