C# 消息发送

界面

frmMain

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Diagnostics;
using System.Threading;

namespace lxw_QQAutoSendMsg
{
    public partial class frmMain : Form
    {
        public frmMain()
        {
            InitializeComponent();
        }

        private List<QQChatWindows> ltQQChatWindows = new List<QQChatWindows>();

        private void btnFindQQWindow_Click(object sender, EventArgs e)
        {
            FindQQChatWindows();
        }

        private void btnSendMsg_Click(object sender, EventArgs e)
        {
            if (this.txtSendText.Text.Equals(String.Empty))
            {
                MessageBox.Show("请输入要发送的内容");
                return;
            }

            if (ltQQChatWindows.Count <= 0)
            {
                MessageBox.Show("没有可用发送的聊天窗体，请先查找对话框！");
                return;
            }

            if (this.listQQWindows.SelectedItem == null)
            {
                MessageBox.Show("请选择需要发送消息的窗体");
                return;
            }

            string qqCaption = this.listQQWindows.SelectedItem.ToString();

            QQChatWindows qqChatWindows = ltQQChatWindows.Find(o => o.Caption.Equals(qqCaption));

            if (qqChatWindows == null)
            {
                MessageBox.Show("没有找到可发送信息的QQ聊天窗体，请先查找对话框！");
            }
            else
            {

                int RepeatTime = 10;
                int SleepTime = 1000;

                if (!int.TryParse(txtRepeatTime.Text, out RepeatTime))
                {
                    RepeatTime = 10;
                }

                if (!int.TryParse(txtSleepTime.Text, out SleepTime))
                {
                    SleepTime = 1000;
                }

                string error = "";
                string time = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");
                string info = "";

                for (int i = 0; i < RepeatTime; i++)
                {
                    if (this.SendQQMsg(qqChatWindows.WindowHwnd, this.txtSendText.Text, out error))
                    {
                        info = time + " [" + qqCaption + "]-->" + "发送成功";
                    }
                    else
                    {
                        info = time + " [" + qqCaption + "]-->" + "发送失败:" + error;
                    }

                    if (info.Contains("发送失败"))
                    {
                        //高亮显示
                        rtxtInfo.SelectionStart = rtxtInfo.Text.Length;
                        rtxtInfo.SelectionLength = info.Length;
                        rtxtInfo.SelectionColor = Color.FromName("Red");
                    }

                    rtxtInfo.AppendText(info + "\r\n");

                    Thread.Sleep(SleepTime);
                }

            }
        }

        /// <summary>
        /// 查找QQ对话框
        /// </summary>
        private void FindQQChatWindows()
        {
            this.listQQWindows.Items.Clear();
            ltQQChatWindows.Clear();
            WinAPI.EnumDesktopWindows(IntPtr.Zero, new WinAPI.EnumDesktopWindowsDelegate(EnumWindowsProc), IntPtr.Zero);
        }

        private bool EnumWindowsProc(IntPtr hWnd, uint lParam)
        {
            string qqProName = this.GetProcessName(hWnd);
            StringBuilder className = new StringBuilder(255 + 1); //ClassName 最长
            WinAPI.GetClassName(hWnd, className, className.Capacity);

            if (!qqProName.Equals(String.Empty) && qqProName.Equals("QQ") && className.ToString().Equals("TXGuiFoundation"))
            {
                StringBuilder caption = new StringBuilder(WinAPI.GetWindowTextLength(hWnd) + 1);
                WinAPI.GetWindowText(hWnd, caption, caption.Capacity);
                if (!caption.ToString().Equals(String.Empty) && !caption.ToString().Equals("TXMenuWindow"))
                {
                    QQChatWindows qqchat = new QQChatWindows(hWnd, caption.ToString());
                    ltQQChatWindows.Add(qqchat);
                    this.listQQWindows.Items.Add(caption);
                }

            }
            return true;

        }

        public string GetProcessName(IntPtr hWnd)
        {
            try
            {
                string processname = String.Empty;
                int proid = 0;
                uint threadid = WinAPI.GetWindowThreadProcessId(hWnd, out proid);
                if (threadid > 0 && proid > 0)
                {
                    Process pro = Process.GetProcessById(proid);
                    processname = pro.ProcessName;
                }
                return processname;
            }
            catch
            {
                return String.Empty;
            }

        }

        /// <summary>
        /// 发送消息
        /// </summary>
        /// <param name="hWnd"></param>
        /// <param name="sendText"></param>
        /// <param name="error"></param>
        /// <returns></returns>
        private bool SendQQMsg(IntPtr hWnd, string sendText, out string error)
        {
            error = "";
            try
            {
                WinAPI.ShowWindow(hWnd, WinAPI.ShowWindowCommands.Normal);

                WinAPI.BringWindowToTop(hWnd);

                SendKeys.SendWait(sendText);

                //SendKeys.SendWait("^{ENTER}");//Ctrl+Enter
                SendKeys.Send("{ENTER}");//Enter

                return true;
            }
            catch (Exception ex)
            {
                error = ex.Message;
                return false;
            }

        }
    }
}

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