致力于挖掘功能强大、性能优越、创新前沿且简单易用的 C#/.NET 开源框架、项目、类库与工具。助力 .NET 开发者轻松解锁并运用这些实用的宝藏资源，提升开发效率与创新能力！
项目介绍
Common.Utility 是一个开源的、比较全面的 C#/.NET 帮助类库，旨在提供一系列常用的工具类和辅助方法，以简化 .NET 开发中的常见任务。该项目涵盖了从数据处理、文件操作、网络请求到图形处理、安全验证等多个方面，为开发者提供了一个丰富且易用的工具库。
适用场景
-
企业级应用：为企业级应用程序提供稳定、可靠的底层工具支持，如数据库操作、日志记录、缓存管理等。 -
Web 开发：辅助 Web 开发中的常见任务，如 Cookie & Session 管理、URL 操作、HTML 处理等。 -
桌面应用：支持桌面应用程序的文件操作、图形处理、注册表操作等需求。 -
移动开发：虽然主要针对 .NET Framework，但部分功能也适用于 Xamarin 或 .NET MAUI 等移动开发平台。 -
数据处理与分析：提供 CSV 文件转换、Excel 操作、JSON 处理等数据相关工具，便于数据分析和处理。
加密解密实用类
using System;
using System.Security.Cryptography;
using System.IO;
namespace Common.Utility
{
/// <summary>
/// 加密解密实用类。
/// </summary>
public class Encrypt
{
//密钥
private static byte[] arrDESKey = new byte[] {42, 16, 93, 156, 78, 4, 218, 32};
private static byte[] arrDESIV = new byte[] {55, 103, 246, 79, 36, 99, 167, 3};
/// <summary>
/// 加密。
/// </summary>
/// <param name="m_Need_Encode_String"></param>
/// <returns></returns>
public static string Encode(string m_Need_Encode_String)
{
if (m_Need_Encode_String == null)
{
throw new Exception("Error: \n源字符串为空！！");
}
DESCryptoServiceProvider objDES = new DESCryptoServiceProvider();
MemoryStream objMemoryStream = new MemoryStream();
CryptoStream objCryptoStream = new CryptoStream(objMemoryStream,objDES.CreateEncryptor(arrDESKey,arrDESIV),CryptoStreamMode.Write);
StreamWriter objStreamWriter = new StreamWriter(objCryptoStream);
objStreamWriter.Write(m_Need_Encode_String);
objStreamWriter.Flush();
objCryptoStream.FlushFinalBlock();
objMemoryStream.Flush();
return Convert.ToBase64String(objMemoryStream.GetBuffer(), 0, (int)objMemoryStream.Length);
}
/// <summary>
/// 解密。
/// </summary>
/// <param name="m_Need_Encode_String"></param>
/// <returns></returns>
public static string Decode(string m_Need_Encode_String)
{
if (m_Need_Encode_String == null)
{
throw new Exception("Error: \n源字符串为空！！");
}
DESCryptoServiceProvider objDES = new DESCryptoServiceProvider();
byte[] arrInput = Convert.FromBase64String(m_Need_Encode_String);
MemoryStream objMemoryStream = new MemoryStream(arrInput);
CryptoStream objCryptoStream = new CryptoStream(objMemoryStream,objDES.CreateDecryptor(arrDESKey,arrDESIV),CryptoStreamMode.Read);
StreamReader objStreamReader = new StreamReader(objCryptoStream);
return objStreamReader.ReadToEnd();
}
/// <summary>
/// 32位MD5加密
/// </summary>
/// <param name="strText">要加密字符串</param>
/// <param name="IsLower">是否以小写方式返回</param>
/// <returns></returns>
public static string MD5Encrypt(string strText, bool IsLower)
{
MD5 md5 = new MD5CryptoServiceProvider();
byte[] bytes = System.Text.Encoding.UTF8.GetBytes(strText);
bytes = md5.ComputeHash(bytes);
md5.Clear();
string ret = "";
for (int i = 0; i < bytes.Length; i++)
{
ret += Convert.ToString(bytes[i], 16).PadLeft(2, '0');
}
return ret.PadLeft(32, '0');
}
}
}
SQLHelper帮助类
using System;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
using System.Collections;
namespace HD.DBHelper
{
/// <summary>
/// The SqlHelper class is intended to encapsulate high performance,
/// scalable best practices for common uses of SqlClient.
/// </summary>
public abstract class SqlHelper
{
//Database connection strings
public static readonly string ConnectionStringLocalTransaction = ConfigurationManager.AppSettings["SQLConnString1"];
public static readonly string ConnectionStringInventoryDistributedTransaction = ConfigurationManager.AppSettings["SQLConnString2"];
public static readonly string ConnectionStringOrderDistributedTransaction = ConfigurationManager.AppSettings["SQLConnString3"];
public static readonly string ConnectionStringProfile = ConfigurationManager.AppSettings["SQLProfileConnString"];
// Hashtable to store cached parameters
private static Hashtable parmCache = Hashtable.Synchronized(new Hashtable());
/// <summary>
/// Execute a SqlCommand (that returns no resultset) against the database specified in the connection string
/// using the provided parameters.
/// </summary>
/// <remarks>
/// e.g.:
/// int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="connectionString">a valid connection string for a SqlConnection</param>
/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
/// <param name="commandText">the stored procedure name or T-SQL command</param>
/// <param name="commandParameters">an array of SqlParamters used to execute the command</param>
/// <returns>an int representing the number of rows affected by the command</returns>
public static int ExecuteNonQuery(string connectionString, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
{
SqlCommand cmd = new SqlCommand();
using (SqlConnection conn = new SqlConnection(connectionString))
{
PrepareCommand(cmd, conn, null, cmdType, cmdText, commandParameters);
int val = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return val;
}
}
/// <summary>
/// Execute a SqlCommand (that returns no resultset) against an existing database connection
/// using the provided parameters.
/// </summary>
/// <remarks>
/// e.g.:
/// int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="conn">an existing database connection</param>
/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
/// <param name="commandText">the stored procedure name or T-SQL command</param>
/// <param name="commandParameters">an array of SqlParamters used to execute the command</param>
/// <returns>an int representing the number of rows affected by the command</returns>
public static int ExecuteNonQuery(SqlConnection connection, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
{
SqlCommand cmd = new SqlCommand();
PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters);
int val = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return val;
}
/// <summary>
/// Execute a SqlCommand (that returns no resultset) using an existing SQL Transaction
/// using the provided parameters.
/// </summary>
/// <remarks>
/// e.g.:
/// int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="trans">an existing sql transaction</param>
/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
/// <param name="commandText">the stored procedure name or T-SQL command</param>
/// <param name="commandParameters">an array of SqlParamters used to execute the command</param>
/// <returns>an int representing the number of rows affected by the command</returns>
public static int ExecuteNonQuery(SqlTransaction trans, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
{
SqlCommand cmd = new SqlCommand();
PrepareCommand(cmd, trans.Connection, trans, cmdType, cmdText, commandParameters);
int val = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return val;
}
/// <summary>
/// Execute a SqlCommand that returns a resultset against the database specified in the connection string
/// using the provided parameters.
/// </summary>
/// <remarks>
/// e.g.:
/// SqlDataReader r = ExecuteReader(connString, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="connectionString">a valid connection string for a SqlConnection</param>
/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
/// <param name="commandText">the stored procedure name or T-SQL command</param>
/// <param name="commandParameters">an array of SqlParamters used to execute the command</param>
/// <returns>A SqlDataReader containing the results</returns>
public static SqlDataReader ExecuteReader(string connectionString, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
{
SqlCommand cmd = new SqlCommand();
SqlConnection conn = new SqlConnection(connectionString);
// we use a try/catch here because if the method throws an exception we want to
// close the connection throw code, because no datareader will exist, hence the
// commandBehaviour.CloseConnection will not work
try
{
PrepareCommand(cmd, conn, null, cmdType, cmdText, commandParameters);
SqlDataReader rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
cmd.Parameters.Clear();
return rdr;
}
catch
{
conn.Close();
throw;
}
}
/// <summary>
/// Execute a SqlCommand that returns the first column of the first record against the database specified in the connection string
/// using the provided parameters.
/// </summary>
/// <remarks>
/// e.g.:
/// Object obj = ExecuteScalar(connString, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="connectionString">a valid connection string for a SqlConnection</param>
/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
/// <param name="commandText">the stored procedure name or T-SQL command</param>
/// <param name="commandParameters">an array of SqlParamters used to execute the command</param>
/// <returns>An object that should be converted to the expected type using Convert.To{Type}</returns>
public static object ExecuteScalar(string connectionString, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
{
SqlCommand cmd = new SqlCommand();
using (SqlConnection connection = new SqlConnection(connectionString))
{
PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters);
object val = cmd.ExecuteScalar();
cmd.Parameters.Clear();
return val;
}
}
/// <summary>
/// Execute a SqlCommand that returns the first column of the first record against an existing database connection
/// using the provided parameters.
/// </summary>
/// <remarks>
/// e.g.:
/// Object obj = ExecuteScalar(connString, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="conn">an existing database connection</param>
/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
/// <param name="commandText">the stored procedure name or T-SQL command</param>
/// <param name="commandParameters">an array of SqlParamters used to execute the command</param>
/// <returns>An object that should be converted to the expected type using Convert.To{Type}</returns>
public static object ExecuteScalar(SqlConnection connection, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
{
SqlCommand cmd = new SqlCommand();
PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters);
object val = cmd.ExecuteScalar();
cmd.Parameters.Clear();
return val;
}
/// <summary>
/// add parameter array to the cache
/// </summary>
/// <param name="cacheKey">Key to the parameter cache</param>
/// <param name="cmdParms">an array of SqlParamters to be cached</param>
public static void CacheParameters(string cacheKey, params SqlParameter[] commandParameters)
{
parmCache[cacheKey] = commandParameters;
}
/// <summary>
/// Retrieve cached parameters
/// </summary>
/// <param name="cacheKey">key used to lookup parameters</param>
/// <returns>Cached SqlParamters array</returns>
public static SqlParameter[] GetCachedParameters(string cacheKey)
{
SqlParameter[] cachedParms = (SqlParameter[])parmCache[cacheKey];
if (cachedParms == null)
return null;
SqlParameter[] clonedParms = new SqlParameter[cachedParms.Length];
for (int i = 0, j = cachedParms.Length; i < j; i++)
clonedParms[i] = (SqlParameter)((ICloneable)cachedParms[i]).Clone();
return clonedParms;
}
/// <summary>
/// Prepare a commandfor execution
/// </summary>
/// <param name="cmd">SqlCommand object</param>
/// <param name="conn">SqlConnection object</param>
/// <param name="trans">SqlTransaction object</param>
/// <param name="cmdType">Cmd type e.g. stored procedure or text</param>
/// <param name="cmdText">Command text, e.g. Select * from Products</param>
/// <param name="cmdParms">SqlParameters to use in the command</param>
private static void PrepareCommand(SqlCommand cmd, SqlConnection conn, SqlTransaction trans, CommandType cmdType, string cmdText, SqlParameter[] cmdParms)
{
if (conn.State != ConnectionState.Open)
conn.Open();
cmd.Connection = conn;
cmd.CommandText = cmdText;
if (trans != null)
cmd.Transaction = trans;
cmd.CommandType = cmdType;
if (cmdParms != null)
{
foreach (SqlParameter parm in cmdParms)
cmd.Parameters.Add(parm);
}
}
}
}
开源地址
https://github.com/laochiangx/Common.Utility
