c# 批量替换源码

【实例简介】

开机启动管理项程序

窗体的浮动及隐藏--示例源码下载.zip

Entity Framework 6 连接 sqlite

自动加载指定目录的图片，点击自动播放之后，开始全屏播放

实例截图： 部分源码：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 Lqarpjj.Study.Demo.ADLSTool.Class;using System.Diagnostics;using System.IO;using Microsoft.Win32;namespace Lqarpjj.Study.Demo.ADLSTool{ public partial class frmMain : Form { #region 自定义变量 /// /// 静态变量存储信息的地址文件 /// private static string ADSLPath = Application.StartupPath @"ADSL.ini"; private static string ConnectionsPath = Application.StartupPath @"create.vbs"; /// /// 定义Ini写入对象 /// private IniWrite ini = new IniWrite(ADSLPath); /// /// 判断第一登录 /// private bool IsFirst = true; /// /// /// private MD5.DES.Md5Class md5 = new MD5.DES.Md5Class(); /// /// /// public static string key = null; #endregion /// /// 构造函数 /// public frmMain() { InitializeComponent(); } #region 窗体事件 /// /// 窗体初始 /// /// /// private void frmMain_Load(object sender, EventArgs e) { SetToolTip(); IntiLoad(sender, e); } #endregion #region 控件按钮事件 /// /// 复制账号 /// /// /// private void btnCopyAccount_Click(object sender, EventArgs e) { if (this.chkSpecial.Checked)//判断特殊拨号是否勾选 { //进行加密 UsernameEncode encode = new UsernameEncode(); Clipboard.SetDataObject(encode.EncodeUsername(this.txtAccount.Text, this.txtPassword.Text)); } else { Clipboard.SetDataObject(this.txtAccount.Text); } MessageBox.Show("账号已经复制到剪贴板！", "复制成功"); } /// /// 拨号 /// /// /// private void btnDia_Click(object sender, EventArgs e) { if (this.txtAccount.Text.Trim() == "") { MessageBox.Show("账号不能为空", "输入错误"); txtAccount.Focus(); return; } if (this.txtPassword.Text.Trim() == "") { MessageBox.Show("密码不能为空", "输入错误"); txtPassword.Focus(); return; } this.NetDia(); } /// /// 找不到电话簿？ /// /// /// private void lblNotFind_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e) { this.CreateConnections(); } /// /// 记住账号联动 /// /// /// private void chkRemAccount_CheckedChanged(object sender, EventArgs e) { if (!this.chkRemAccount.Checked) { this.chkRemPassword.Checked = false; } } /// /// 记住密码联动 /// /// /// private void chkRemPassword_CheckedChanged(object sender, EventArgs e) { if (this.chkRemPassword.Checked) { this.chkRemAccount.Checked = true; } } /// /// 自动登录启动 /// /// /// private void AutoConectTimer_Tick(object sender, EventArgs e) { this.AutoConectTimer.Enabled = false; new frmLinkInfo(this).Show(); base.Hide(); } #endregion #region 自定义方法 /// /// 初始登录 /// /// /// private void IntiLoad(object sender, EventArgs e) { FileInfo info = new FileInfo(ADSLPath); try { if (info.Exists) { this.ReadConfig(); } if (this.chkAutoDia.Checked)//是否自动登录 { this.AutoConectTimer.Start(); } } catch (Exception) { File.Delete(ADSLPath); this.frmMain_Load(sender, e); } } /// ///设置控件提示 /// private void SetToolTip() { ToolTip tip = new ToolTip(); tip.BackColor = System.Drawing.Color.Transparent; tip.SetToolTip(this.btnCopyAccount, "复制账号到剪贴板。如果勾选了特殊拨号，复制的则是加密过的账号。"); tip.SetToolTip(this.btnDia, "手动进行拨号。"); tip.SetToolTip(this.chkAutoDia, "勾选后，下次启动将自动拨号。"); tip.SetToolTip(this.chkSpecial, "如果你原本使用协同拨号器拨号，请勾选此项。"); tip.SetToolTip(this.chkRemPassword, "勾选后，将会保存密码信息，同时保存账号信息。"); tip.SetToolTip(this.chkRemAccount, "勾选后，将会保存账号信息，但不会保存密码信息。"); tip.SetToolTip(this.txtPassword, "在这里输入你的密码。如果有字母，有大小写之分。"); tip.SetToolTip(this.lblNotFind, "如果拨号时提示找不到电话簿，请点击这里。"); tip.SetToolTip(this.txtAccount, "在这里输入你的用户名，如果是特殊拨号不分大小写。"); tip.SetToolTip(this.chkAutoClo, "勾选后拨号成功将自动关闭程序，如果拨号失败，则不会自动关闭。"); } /// /// 写入配置信息 /// private void WriteConfig() { this.ini.Writue("用户设置", "记住账号", this.chkRemAccount.Checked.ToString()); this.ini.Writue("用户设置", "记住密码", this.chkRemPassword.Checked.ToString()); this.ini.Writue("用户设置", "特殊拨号", this.chkSpecial.Checked.ToString()); this.ini.Writue("用户设置", "自动连接", this.chkAutoDia.Checked.ToString()); this.ini.Writue("用户设置", "自动关闭", this.chkAutoClo.Checked.ToString()); this.ini.Writue("用户设置", "首次使用", this.IsFirst.ToString()); if (this.chkRemAccount.Checked) { this.ini.Writue("用户信息", "账号", this.md5.Encryption(this.txtAccount.Text)); this.ini.Writue("加密密钥", "账号", key); } if (this.chkRemPassword.Checked) { this.ini.Writue("用户信息", "密码", this.md5.Encryption(this.txtPassword.Text)); this.ini.Writue("加密密钥", "密码", key); } } /// /// 读取配置信息 /// private void ReadConfig() { this.chkRemAccount.Checked = bool.Parse(this.ini.ReadValue("用户设置", "记住账号")); this.chkRemPassword.Checked = bool.Parse(this.ini.ReadValue("用户设置", "记住密码")); this.chkSpecial.Checked = bool.Parse(this.ini.ReadValue("用户设置", "特殊拨号")); this.chkAutoDia.Checked = bool.Parse(this.ini.ReadValue("用户设置", "自动连接")); this.chkAutoClo.Checked = bool.Parse(this.ini.ReadValue("用户设置", "自动关闭")); this.IsFirst = bool.Parse(this.ini.ReadValue("用户设置", "首次使用")); if (this.chkRemAccount.Checked) { this.txtAccount.Text = this.md5.Decryption(this.ini.ReadValue("加密密钥", "账号"), this.ini.ReadValue("用户信息", "账号")); if (this.txtAccount.Text.Trim() == "") { this.txtAccount.Text = null; } } if (this.chkRemPassword.Checked) { this.txtPassword.Text = this.md5.Decryption(this.ini.ReadValue("加密密钥", "密码"), this.ini.ReadValue("用户信息", "密码")); if (this.txtPassword.Text.Trim() == "") { this.txtPassword.Text = null; } } } /// /// 判断是否是第一次使用本软件 /// private void IsFirstUse() { if (this.IsFirst) { if (MessageBox.Show("检测到您是初次使用本软件，是否自动创建一个名为【宽带连接】的连接？如果已经存在，请选否。", "初次使用", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes) { this.CreateConnections(); } this.IsFirst = false; this.WriteConfig(); } } /// /// 连接宽带 /// private void NetDia() { this.IsFirstUse(); new frmLinkInfo(this).Show(); base.Hide(); } /// /// 电话簿 /// private void CreateConnections() { Process[] processArray; StreamWriter writer = new StreamWriter(ConnectionsPath, false, Encoding.Default); writer.Write(this.GetVersion()); writer.Close(); Process process = new Process(); process.StartInfo.FileName = ConnectionsPath; process.StartInfo.CreateNoWindow = true; base.Hide(); process.Start(); process.WaitForExit(); File.Delete(ConnectionsPath); Label_006A: processArray = Process.GetProcesses(); foreach (Process process2 in processArray) { if (process2.ProcessName.ToString() == "rasphone") { goto Label_006A; } } base.Show(); } /// /// 获取版本？ /// /// private string GetVersion() { StringBuilder str = new StringBuilder(); str.Append(""); str.Append("set ws=createobject("wscript.shell") "); str.Append(" ws.run "rasphone -a 宽带连接" "); str.Append(" wscript.sleep 200 "); str.Append(" ws.sendkeys "{t}" "); str.Append(" wscript.sleep 200 "); str.Append(" ws.sendkeys "{n}" "); str.Append(" wscript.sleep 200 "); str.Append(" ws.sendkeys "{enter}" "); str.Append(" wscript.sleep 200 "); str.Append(" ws.sendkeys "{enter}" "); if (Registry.LocalMachine.OpenSubKey(@"SoftwareMicrosoftWindows NTCurrentVersion").GetValue("ProductName").ToString() == "Windows 7 Ultimate") { str.Append(""); str.Append("set ws=createobject("wscript.shell")"); str.Append(" ws.run "rasphone -a 宽带连接""); str.Append(" wscript.sleep 200"); str.Append(" ws.sendkeys "{enter}""); str.Append(" wscript.sleep 200"); str.Append(" ws.sendkeys "{enter}""); } return str.ToString(); } #endregion }}

C# web QQ登陆示例

itextsharp.dll 的使用 包括了简单3个实例

超赞的BBS论坛

这是一个物联网设备通讯协议实现客户端，将包括主流PLC通信读取、ModBus协议、Bacnet协议等常用工业通讯协议。 - 本组件基于.NET Standard 2.0，可用于.Net的跨平台开发，如Windows、Linux甚至可运行于树莓派上。 - 本组件终身开源免费，采用最宽松MIT协议，您也可以随意修改和商业使用（商业使用请做好评估和测试）。   - 开发工具：Visual Studio 2019  - QQ交流群：[995475200](https://jq.qq.com/?_wv=1027&k=5bz0ne5)   - IoTClient Tool [下载1](https://github.com/zhaopeiym/IoTClient/releases) [下载2](https://files-cdn.cnblogs.com/files/zhaopei/IoTClient.rar)