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private void txtUserId_KeyPress(object sender, KeyPressEventArgs e){ //如果输入的不是数字键，也不是回车键、Backspace键，则取消该输入 if (!(Char.IsNumber(e.KeyChar)) && e.KeyChar!=(char)13 && e.KeyChar!=(char)8) { e.Handled = true; } } 阅读全文
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public static class DbOperation { private static string connStr = "Data Source=127.0.0.1;Initial Catalog=wk;Persist Security Info=True;User ID=sa;Password=123"; public static string DbQueryCount(string cmdStr) { string result = ""; SqlConnection conn = n... 阅读全文
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public class FtpOperation { public static void UploadFile(FileInfo fileinfo, string targetDir, string hostname, string username, string password, string reName) { //1. check target string target; if (targetDir.Trim() == "") { ... 阅读全文
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public static string GetMD5HashFromFile(string fileName) { try { FileStream file = new FileStream(fileName, FileMode.Open); System.Security.Cryptography.MD5 md5 = new System.Security.Cryptography.MD5CryptoServiceProvider(); b... 阅读全文
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private string GetMD5str(string oldStr) { //将输入转换为ASCII 字符编码 ASCIIEncoding enc = new ASCIIEncoding(); //将字符串转换为字节数组 byte[] buffer = enc.GetBytes(oldStr); //创建MD5实例 MD5 md5 = new MD5CryptoServiceProvider(); //进行MD5加密 ... 阅读全文
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using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Security.Cryptography;using System.IO;using System.Data;using System.Data.SQLite;using System.Web;using System.Runtime.InteropServices;namespace AiXinTang.User{ public static class DbSafe { pu... 阅读全文
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1.怎样通过位运算处理权限的问题 阅读全文
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1.怎样让一个弹出不关闭的情况下他的上一个不能操作？2.SQLITE配置前台界面的方便性？2.函数的摘要注释？3.GUID的作用？怎样生成？4.panel的自动排列控件？用FlowLayOUTpANLE5.C#读取文字后转化为语音？6.查看图片的二进制代码？7.datagridview分页和自动加长？ 阅读全文