[c#]常用工具类收集
1. 数字金额转中文
/// <summary>
/// 单个数字对应的中文
/// </summary>
/// <param name="n">单个数字</param>
/// <returns>中文数字</returns>
public static char GetUpperDigit(char n)
{
if (false==char.IsDigit(n))
{
return n;
}
switch (n)
{
case '1':
return '壹';
case '2':
return '贰';
case '3':
return '叁';
case '4':
return '肆';
case '5':
return '伍';
case '6':
return '陆';
case '7':
return '柒';
case '8':
return '捌';
case '9':
return '玖';
default:
return '零';
}
}
/// <summary>
/// 获取中文数字
/// </summary>
/// <param name="digits">数字串（整数，亿以内）</param>
/// <returns></returns>
public static string GetUpperDigits(string digits)
{
var sb = new StringBuilder();
for (int i = 0; i < digits.Length; i++)
{
char digitChar = digits[i];
if (digitChar != '0'
|| digits.Length == 1
|| (i - 1 >= 0 && digits[i - 1] != '0' && i + 1 < digits.Length && digits[i + 1] != '0'))
{
sb.Append(GetUpperDigit(digitChar));
}
if (digitChar == '0')
{
continue;
}
switch ((digits.Length - i - 1) % 6)
{
case 1:
sb.Append("拾");
break;
case 2:
sb.Append("佰");
break;
case 3:
sb.Append("仟");
break;
case 4:
sb.Append("万");
break;
case 5:
sb.Append("亿");
break;
}
}
return sb.ToString();
}2. FTP下载文件
public static void Download(string sourceFilePath, string desFilePath, string fileName,string ftpUser,string ftpPwd)
{
FtpWebRequest reqFTP;
FileStream outputStream = null;
try
{
if (!Directory.Exists(desFilePath))
{
Directory.CreateDirectory(desFilePath);
}
reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(sourceFilePath + "/" + fileName));
reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;
reqFTP.UseBinary = true;
reqFTP.Credentials = new NetworkCredential(ftpUser, ftpPwd);
reqFTP.Timeout = 40000;
FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
Stream ftpStream = response.GetResponseStream();
long cl = response.ContentLength;
int bufferSize = 2048;
int readCount;
byte[] buffer = new byte[bufferSize];
outputStream = new FileStream(desFilePath + "\\" + fileName, FileMode.Create);
readCount = ftpStream.Read(buffer, 0, bufferSize);
while (readCount > 0)
{
outputStream.Write(buffer, 0, readCount);
readCount = ftpStream.Read(buffer, 0, bufferSize);
}
ftpStream.Close();
outputStream.Close();
response.Close();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
if (outputStream != null)
{
outputStream.Close();
}
}
}3. 压缩及解压
// 读入大小
const int SIZE = 10240;
/// <summary>
/// 编码方式
/// </summary>
public readonly static Encoding GZipEncoding = Encoding.UTF8;
/// <summary>
/// 解压缩
/// </summary>
/// <param name="content"></param>
/// <returns></returns>
public static string Decompress(byte[] compressBuffer)
{
using (MemoryStream msDecompress = new MemoryStream())
{
var gzip = new GZipStream(new MemoryStream(compressBuffer), CompressionMode.Decompress);
int len = 0;
byte[] buffer = new byte[SIZE];
while ((len = gzip.Read(buffer, 0, buffer.Length)) != 0)
{
msDecompress.Write(buffer, 0, len);
}
gzip.Close();
return GZipEncoding.GetString(msDecompress.ToArray());
}
}
/// <summary>
/// 压缩
/// </summary>
/// <param name="buffer">要压缩的字节</param>
/// <returns></returns>
public static MemoryStream Compress(byte[] buffer)
{
var ms = new MemoryStream();
var compressedzipStream = new GZipStream(ms, CompressionMode.Compress, true);
compressedzipStream.Write(buffer, 0, buffer.Length);
compressedzipStream.Close();
return ms;
} 4. 取文件MD5值
/// <summary>
/// 计算指定文件的MD5值
/// </summary>
/// <param name="fileName">指定文件的完全限定名称</param>
/// <returns>返回值的字符串形式</returns>
public static String ComputeMD5(String fileName)
{
String hashMD5 = String.Empty;
//检查文件是否存在，如果文件存在则进行计算，否则返回空值
if (File.Exists(fileName))
{
using (FileStream fs = new FileStream(fileName, FileMode.Open, FileAccess.Read))
{
//计算文件的MD5值
System.Security.Cryptography.MD5 calculator = System.Security.Cryptography.MD5.Create();
Byte[] buffer = calculator.ComputeHash(fs);
calculator.Clear();
//将字节数组转换成十六进制的字符串形式
StringBuilder stringBuilder = new StringBuilder();
for (int i = 0; i < buffer.Length; i++)
{
stringBuilder.Append(buffer[i].ToString("x2"));
}
hashMD5 = stringBuilder.ToString();
}//关闭文件流
}//结束计算
return hashMD5;
}5. 简单的HTTP下载
/// <summary>
/// http下载
/// </summary>
/// <param name="url"></param>
/// <param name="encoding">字符编码</param>
/// <returns></returns>
public static string GetContent(string url,int timeout = 60000)
{
string content = string.Empty;
try
{
var request = HttpWebRequest.Create(url) as HttpWebRequest;
request.Timeout = timeout;
request.Method = "GET";
request.Headers = headers;
var response = request.GetResponse() as HttpWebResponse;
using (var sr = new StreamReader(response.GetResponseStream(), httpEncoding))
{
content = sr.ReadToEnd();
}
}
catch (Exception ex)
{
throw new Exception(string.Format("{0} {1}", ex.Message, url));
}
return content;
}6. 以http方式调用对方接口(post+json)
/// <summary>
/// 创建POST方式的HTTP请求
/// </summary>
public static string PostHttpResponse(string url, string jsonStr)
{
byte[] data = Encoding.UTF8.GetBytes(jsonStr);
//设置https验证方式
if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase))
{
ServicePointManager.ServerCertificateValidationCallback =
new RemoteCertificateValidationCallback(CheckValidationResult);
}
HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
request.Method = "POST";
request.ContentLength = data.Length;
request.ContentType = "application/x-www-form-urlencoded";
//发送POST数据
using (Stream stream = request.GetRequestStream())
{
stream.Write(data, 0, data.Length);
}
return GetResponseString(request.GetResponse() as HttpWebResponse);
}
/// <summary>
/// 获取请求的数据
/// </summary>
private static string GetResponseString(HttpWebResponse webresponse)
{
using (Stream s = webresponse.GetResponseStream())
{
StreamReader reader = new StreamReader(s, Encoding.UTF8);
return reader.ReadToEnd();
}
}
public static bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)
{
//直接确认，否则打不开
return true;
}7. 导出list对象到Excel(com方法调用,导大数据量时会很慢)
/// <summary>
/// 导出list对象到excel
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="list"></param>
/// <param name="subPathName"></param>
/// <param name="msg"></param>
/// <returns></returns>
public static bool SaveToExcel<T>(List<T> list,string subPathName, out string msg)
{
msg = "";
object misValue = System.Reflection.Missing.Value;
Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application();
Workbook xlWorkBook = xlApp.Workbooks.Add(misValue);
int iSheet = 1;
Worksheet xlWorkSheet = (Worksheet)xlWorkBook.Worksheets.get_Item(iSheet);
string filePath = Path.Combine(Directory.GetCurrentDirectory(), string.Format("excel\\{0}\\{1}.xls", subPathName, DateTime.Now.ToString("yyyyMMddHHssmm")));
if (!Directory.Exists(Path.GetDirectoryName(filePath)))
{
Directory.CreateDirectory(Path.GetDirectoryName(filePath));
}
bool isSuceess = true;
PropertyInfo[] props = typeof(T).GetProperties();
for (int j = 0; j < list.Count; j++)
{
for (int i = 0; i < props.Length; i++)
{
if (0 == j)
{
//如果属性有描述,则取描述为标题
if (props[i].IsDefined(typeof(DescriptionAttribute), true))
{
object[] descObjs = props[i].GetCustomAttributes(typeof(DescriptionAttribute), true);
xlWorkSheet.Cells[1, i + 1] = ((DescriptionAttribute)descObjs[0]).Description;
}
else
{
xlWorkSheet.Cells[1, i + 1] = props[i].Name;
}
}
object value = props[i].GetValue(list[j], null) ?? string.Empty;
xlWorkSheet.Cells[j + 2, i + 1] = value;
}
if (j > 0 && 0 == j % 60000)//office2003 一个Sheet不能超过65535行
{
xlWorkSheet = (Worksheet)xlWorkBook.Worksheets.get_Item(++iSheet);
}
}
try
{
xlWorkBook.SaveAs(Filename: filePath, FileFormat: XlFileFormat.xlWorkbookNormal);
xlWorkBook.Close(true, misValue, misValue);
xlWorkBook = null;
xlApp.Quit();
xlApp = null;
msg = filePath;
}
catch (Exception ex)
{
msg = ex.Message;
xlWorkBook.Close(true, misValue, misValue);
xlApp.Quit();
isSuceess = false;
}
finally
{
GC.Collect();//垃圾回收
GC.WaitForPendingFinalizers();
}
return isSuceess;
}
