QQ项目之六聊天窗口
【摘要】
using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;using Syste...
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using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Data;
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using System.Drawing;
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using System.Text;
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using System.Windows.Forms;
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using System.Data.SqlClient;
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using System.Threading;
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using System.IO;
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namespace MYQQ
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{
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/// <summary>
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/// 聊天窗体:2015.12.23； 聊天窗体第一个图片；
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/// </summary>
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public partial class ChatForm : Form
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{
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//0 设置成员变量，4个
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public int friendId; // 当前聊天的好友号码
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public string nickName; // 当前聊天的好友昵称
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public int faceId; // 当前聊天的好友头像Id
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public string myName; //自己的昵称;
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//****************************以下构造函数不要动
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public ChatForm()
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{
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InitializeComponent();
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}
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//**************************不要动
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//第1步:窗体加载时的动作
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private void ChatForm_Load(object sender, EventArgs e)
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{
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// 设置窗体标题
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this.Text = string.Format("与{0}聊天中",nickName);
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// 设置窗体顶部显示的好友信息
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picFace.Image = ilFaces.Images[faceId];
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lblFriend.Text = string.Format("{0}({1})",nickName,friendId);
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ShowMessage(); // 读取所有的未读消息，显示在窗体中
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}
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// 关闭窗体
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private void btnClose_Click(object sender, EventArgs e)
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{
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this.Close();
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}
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/// <summary>
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/// 将单引号'转换为双引号"
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/// //Sql参数化实现，避免sql单引号问题,但是没有学，所以没有研究!
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/// </summary>
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/// <param name="str"></param>
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/// <returns></returns>
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private string CheckString(string str)
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{
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string returnStr = "";
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if (str.IndexOf("'") != -1) //判断字符串是否含有单引号
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{
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returnStr = str.Replace("'", "''");
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str = returnStr;
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}
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return str;
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}
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//4 发送消息
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private void btnSend_Click(object sender, EventArgs e)
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{
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if (txtChat.Text.Trim() == "") // 不能发送空消息
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{
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MessageBox.Show("不能发送空消息！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
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return;
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}
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else if (txtChat.Text.Trim().Length > 50)
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{
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MessageBox.Show("消息内容过长，请分为几条发送！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
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return;
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}
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else // 发送消息，写入数据库
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{// MessageTypeId:1-表示聊天消息，为简化操作没有读取数据表，到S2可以用常量或者枚举实现
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lblMessages.AppendText("\r\n"+myName+":\r\n\t"+txtChat.Text);
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int result = -1; // 表示操作数据库的结果
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string sql = string.Format(
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@"INSERT Messages(FromUserId, ToUserId, Message, MessageTypeId, MessageState) VALUES ({0},{1},'{2}',{3},{4})",
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UserHelper.loginId, friendId, CheckString(txtChat.Text.Trim()), 1, 0);
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try
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{
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// 执行命令
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SqlCommand command = new SqlCommand(sql, DBHelper.conn);
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DBHelper.conn.Open();
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result = command.ExecuteNonQuery();
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}
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catch (Exception ex)
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{
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MessageBox.Show(ex.Message);
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}
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finally
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{
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DBHelper.conn.Close();
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}
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if (result != 1)
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{
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MessageBox.Show("服务器出现意外错误！", "抱歉", MessageBoxButtons.OK, MessageBoxIcon.Error);
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}
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txtChat.Text = ""; // 输入消息清空
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}
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}
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//********************************************************************发送消息结束!!!!!!!!!!
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/// <summary>
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///第2步：读取所有的未读消息，显示在窗体中
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/// </summary>
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private void ShowMessage()
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{
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string messageIdsString = ""; // 消息的Id组成的字符串;可以用ids代替这么长的变量;
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string message; // 消息内容
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string messageTime; // 消息发出的时间
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string sql = string.Format(
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"SELECT Id, Message,MessageTime From Messages WHERE FromUserId={0} AND ToUserId={1} AND MessageTypeId=1 AND MessageState=0",
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friendId, UserHelper.loginId); // 读取消息的SQL语句;消息类型为 1：普通聊天消息；0:消息状态:未读
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try
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{
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SqlCommand command = new SqlCommand(sql, DBHelper.conn);
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DBHelper.conn.Open();
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SqlDataReader reader = command.ExecuteReader(); //读到一个临时表;
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while (reader.Read()) // 循环将消息添加到窗体上
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{
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messageIdsString += Convert.ToString(reader["Id"]) + ","; //46,47,147,157,159,
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message = Convert.ToString(reader["Message"]);
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messageTime = Convert.ToDateTime(reader["MessageTime"]).ToString(); // 转换为日期类型，告诉学员
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//lblMessages:上面的文本框；消息太多了，需要回车换行
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lblMessages.Text += string.Format("\r\n{0} {1}\r\n {2}",nickName,messageTime,message);
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}
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reader.Close();
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}
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catch (Exception ex)
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{
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MessageBox.Show(ex.Message);
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}
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finally
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{
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DBHelper.conn.Close();
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}
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//2.2 把显示出的消息置为已读；我登陆了，点过头像闪烁，就表示已读!
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if (messageIdsString.Length > 1)
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{
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//SetMessageRead(messageIdsString, ','); //读过之后，需要设置状态为1
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SetMessageRead2(messageIdsString.Remove(messageIdsString.Length - 1)); //Remove()：消除一个长度的逗号;去掉最后面的那个,
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}
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}
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/// <summary>
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/// 使用新方法，来更新数据库，把获取的IdString作为参数;
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/// </summary>
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/// <param name="messageIdsString"></param>
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private void SetMessageRead2(string messageIdsString) //46,47,147,157,159
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{
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string sql = string.Format("Update Messages SET MessageState=1 WHERE Id in ({0})", messageIdsString); ; // 更新状态的SQL语句的固定部分
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try
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{
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SqlCommand command = new SqlCommand(); // 创建Command对象
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command.Connection = DBHelper.conn; // 指定数据库连接
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DBHelper.conn.Open(); // 打开数据库连接
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command.CommandText = sql; // 指定要执行的SQL语句
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int result = command.ExecuteNonQuery(); // 执行命令
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}
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catch (Exception ex)
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{
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MessageBox.Show(ex.Message);
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}
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finally
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{
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DBHelper.conn.Close();
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}
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}
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//**************************************************************读取消息方法结束!
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/// <summary>
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///3 把显示出的消息置为已读
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/// </summary>
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private void SetMessageRead(string messageIdsString, char separator) //151,152,153,154; 分隔符,
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{
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string[] messageIds = messageIdsString.Split(separator); // 分割出每个消息Id,Split,按照某个字符进行分割成数组151 152 153 154
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string sql = "Update Messages SET MessageState=1 WHERE Id="; // 更新状态的SQL语句的固定部分
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string updateSql; // 执行的SQL语句
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try
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{
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SqlCommand command = new SqlCommand(); // 创建Command对象
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command.Connection = DBHelper.conn; // 指定数据库连接
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DBHelper.conn.Open(); // 打开数据库连接
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foreach (string id in messageIds) //逐个从数组取数据151 152 153 154
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{
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if (id != "")
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{
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updateSql = sql + id; // 补充完整的SQL语句
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command.CommandText = updateSql; // 指定要执行的SQL语句
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int result = command.ExecuteNonQuery(); // 执行命令
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}
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}
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}
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catch (Exception ex)
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{
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MessageBox.Show(ex.Message);
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}
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finally
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{
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DBHelper.conn.Close();
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}
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}
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//**********************************************************设置消息已读结束!!!!!
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private void timer1_Tick(object sender, EventArgs e)
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{
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ShowMessage(); //每隔3秒读下消息！
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}
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private void toolStripButton3_Click(object sender, EventArgs e)
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{
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Vibration();
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//可以向数据库插入一个震动标志指令，对方收到这个指令，则本矿口震动！
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}
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//震动方法
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private void Vibration()
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{
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Point pOld = this.Location;//原来的位置
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int radius = 3;//半径
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for (int n = 0; n < 3; n++) //旋转圈数
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{
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//右半圆逆时针
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for (int i = -radius; i <= radius; i++)
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{
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int x = Convert.ToInt32(Math.Sqrt(radius * radius - i * i));
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int y = -i;
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this.Location = new Point(pOld.X + x, pOld.Y + y);
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Thread.Sleep(10);
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}
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//左半圆逆时针
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for (int j = radius; j >= -radius; j--)
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{
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int x = -Convert.ToInt32(Math.Sqrt(radius * radius - j * j));
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int y = -j;
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this.Location = new Point(pOld.X + x, pOld.Y + y);
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Thread.Sleep(10);
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}
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}
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//抖动完成，恢复原来位置
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this.Location = pOld;
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}
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//字体代码
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private void toolStripButton1_Click(object sender, EventArgs e)
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{
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fontDialog1.ShowDialog();
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lblMessages.Font = fontDialog1.Font;
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}
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//颜色代码
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private void toolStripDropDownButton2_Click(object sender, EventArgs e)
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{
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colorDialog1.ShowDialog();
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lblMessages.ForeColor = colorDialog1.Color;
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}
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//发图片
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private void toolStripButton4_Click(object sender, EventArgs e)
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{
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FileSend("PNG文件|*.png|GIF文件|*.gif|BMP文件|*.bmp|JPG文件|*.jpg|所有文件(*.*)|*.*");
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}
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public string Cuser = string.Empty;
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public string CuserIP = string.Empty;
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#region 文件传送,待完善
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private void FileSend(string Filter)
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{
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try
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{
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OpenFileDialog Dlg = new OpenFileDialog();
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FileInfo FI;
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Dlg.Filter = Filter;
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Dlg.CheckFileExists = true;
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Dlg.InitialDirectory = "C:\\Documents and Settings\\" + System.Environment.UserName + "\\桌面\\";
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if (Dlg.ShowDialog() == DialogResult.OK)
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{
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FI = new FileInfo(Dlg.FileName);
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string sendMsg = ":DATA:" + Cuser + "|" + System.Environment.UserName + "|" +
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CuserIP + "|" + Dlg.FileName + "|" + FI.Length + "|";
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byte[] buff = Encoding.Default.GetBytes(sendMsg);
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this.lblMessages.SelectionColor = Color.Red;
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this.lblMessages.AppendText("【发送文件】" + Dlg.FileName + "\r\n");
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this.lblMessages.ForeColor = Color.Black;
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this.lblMessages.ScrollToCaret();
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}
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}
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catch
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{
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MessageBox.Show("文件发送失败！" + "\r\n");
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}
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}
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#endregion
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private void button1_Click(object sender, EventArgs e)
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{
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if (btnZd.Text.Equals(">>"))
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{
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btnZd.Text = "<<";
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this.Width = 400;
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}
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else {
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btnZd.Text = ">>";
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this.Width = 610;
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}
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}
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private void toolStripButton2_Click(object sender, EventArgs e)
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{
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}
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}
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}
文章来源: aaaedu.blog.csdn.net，作者：tea_year，版权归原作者所有，如需转载，请联系作者。
原文链接：aaaedu.blog.csdn.net/article/details/50486833
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