本篇文章给大家带来的内容是介绍字符如何操作普通帮助类？字符操作普通帮助类的方法（代码示例）。有一定的参考价值，有需要的朋友可以参考一下，希望对你们有所帮助。
/// <summary>
/// 普通帮助类
/// </summary>
public class CommonHelper
{
//星期数组
private static string[] _weekdays = { "星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六" };
//空格、回车、换行符、制表符正则表达式
private static Regex _tbbrRegex = new Regex(@"\s*|\t|\r|\n", RegexOptions.IgnoreCase);
#region 时间操作
/// <summary>
/// 获得当前时间的""yyyy-MM-dd HH:mm:ss:fffffff""格式字符串
/// </summary>
public static string GetDateTimeMS()
{
return DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss:fffffff");
}
/// <summary>
/// 获得当前时间的""yyyy年MM月dd日 HH:mm:ss""格式字符串
/// </summary>
public static string GetDateTimeU()
{
return string.Format("{0:U}", DateTime.Now);
}
/// <summary>
/// 获得当前时间的""yyyy-MM-dd HH:mm:ss""格式字符串
/// </summary>
public static string GetDateTime()
{
return DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");
}
/// <summary>
/// 获得当前日期
/// </summary>
public static string GetDate()
{
return DateTime.Now.ToString("yyyy-MM-dd");
}
/// <summary>
/// 获得中文当前日期
/// </summary>
public static string GetChineseDate()
{
return DateTime.Now.ToString("yyyy月MM日dd");
}
/// <summary>
/// 获得当前时间(不含日期部分)
/// </summary>
public static string GetTime()
{
return DateTime.Now.ToString("HH:mm:ss");
}
/// <summary>
/// 获得当前小时
/// </summary>
public static string GetHour()
{
return DateTime.Now.Hour.ToString("00");
}
/// <summary>
/// 获得当前天
/// </summary>
public static string GetDay()
{
return DateTime.Now.Day.ToString("00");
}
/// <summary>
/// 获得当前月
/// </summary>
public static string GetMonth()
{
return DateTime.Now.Month.ToString("00");
}
/// <summary>
/// 获得当前年
/// </summary>
public static string GetYear()
{
return DateTime.Now.Year.ToString();
}
/// <summary>
/// 获得当前星期(数字)
/// </summary>
public static string GetDayOfWeek()
{
return ((int)DateTime.Now.DayOfWeek).ToString();
}
/// <summary>
/// 获得当前星期(汉字)
/// </summary>
public static string GetWeek()
{
return _weekdays[(int)DateTime.Now.DayOfWeek];
}
#endregion
#region 数组操作
/// <summary>
/// 获得字符串在字符串数组中的位置
/// </summary>
public static int GetIndexInArray(string s, string[] array, bool ignoreCase)
{
if (string.IsNullOrEmpty(s) || array == null || array.Length == 0)
return -1;
int index = 0;
string temp = null;
if (ignoreCase)
s = s.ToLower();
foreach (string item in array)
{
if (ignoreCase)
temp = item.ToLower();
else
temp = item;
if (s == temp)
return index;
else
index++;
}
return -1;
}
/// <summary>
/// 获得字符串在字符串数组中的位置
/// </summary>
public static int GetIndexInArray(string s, string[] array)
{
return GetIndexInArray(s, array, false);
}
/// <summary>
/// 判断字符串是否在字符串数组中
/// </summary>
public static bool IsInArray(string s, string[] array, bool ignoreCase)
{
return GetIndexInArray(s, array, ignoreCase) > -1;
}
/// <summary>
/// 判断字符串是否在字符串数组中
/// </summary>
public static bool IsInArray(string s, string[] array)
{
return IsInArray(s, array, false);
}
/// <summary>
/// 判断字符串是否在字符串中
/// </summary>
public static bool IsInArray(string s, string array, string splitStr, bool ignoreCase)
{
return IsInArray(s, StringHelper.SplitString(array, splitStr), ignoreCase);
}
/// <summary>
/// 判断字符串是否在字符串中
/// </summary>
public static bool IsInArray(string s, string array, string splitStr)
{
return IsInArray(s, StringHelper.SplitString(array, splitStr), false);
}
/// <summary>
/// 判断字符串是否在字符串中
/// </summary>
public static bool IsInArray(string s, string array)
{
return IsInArray(s, StringHelper.SplitString(array, ","), false);
}
/// <summary>
/// 将对象数组拼接成字符串
/// </summary>
public static string ObjectArrayToString(object[] array, string splitStr)
{
if (array == null || array.Length == 0)
return "";
StringBuilder result = new StringBuilder();
for (int i = 0; i < array.Length; i++)
result.AppendFormat("{0}{1}", array[i], splitStr);
return result.Remove(result.Length - splitStr.Length, splitStr.Length).ToString();
}
/// <summary>
/// 将对象数组拼接成字符串
/// </summary>
public static string ObjectArrayToString(object[] array)
{
return ObjectArrayToString(array, ",");
}
/// <summary>
/// 将字符串数组拼接成字符串
/// </summary>
public static string StringArrayToString(string[] array, string splitStr)
{
return ObjectArrayToString(array, splitStr);
}
/// <summary>
/// 将字符串数组拼接成字符串
/// </summary>
public static string StringArrayToString(string[] array)
{
return StringArrayToString(array, ",");
}
/// <summary>
/// 将整数数组拼接成字符串
/// </summary>
public static string IntArrayToString(int[] array, string splitStr)
{
if (array == null || array.Length == 0)
return "";
StringBuilder result = new StringBuilder();
for (int i = 0; i < array.Length; i++)
result.AppendFormat("{0}{1}", array[i], splitStr);
return result.Remove(result.Length - splitStr.Length, splitStr.Length).ToString();
}
/// <summary>
/// 将整数数组拼接成字符串
/// </summary>
public static string IntArrayToString(int[] array)
{
return IntArrayToString(array, ",");
}
/// <summary>
/// 移除数组中的指定项
/// </summary>
/// <param name="array">源数组</param>
/// <param name="removeItem">要移除的项</param>
/// <param name="removeBackspace">是否移除空格</param>
/// <param name="ignoreCase">是否忽略大小写</param>
/// <returns></returns>
public static string[] RemoveArrayItem(string[] array, string removeItem, bool removeBackspace, bool ignoreCase)
{
if (array != null && array.Length > 0)
{
StringBuilder arrayStr = new StringBuilder();
if (ignoreCase)
removeItem = removeItem.ToLower();
string temp = "";
foreach (string item in array)
{
if (ignoreCase)
temp = item.ToLower();
else
temp = item;
if (temp != removeItem)
arrayStr.AppendFormat("{0}_", removeBackspace ? item.Trim() : item);
}
return StringHelper.SplitString(arrayStr.Remove(arrayStr.Length - 1, 1).ToString(), "_");
}
return array;
}
/// <summary>
/// 移除数组中的指定项
/// </summary>
/// <param name="array">源数组</param>
/// <returns></returns>
public static string[] RemoveArrayItem(string[] array)
{
return RemoveArrayItem(array, "", true, false);
}
/// <summary>
/// 移除字符串中的指定项
/// </summary>
/// <param name="s">源字符串</param>
/// <param name="splitStr">分割字符串</param>
/// <returns></returns>
public static string[] RemoveStringItem(string s, string splitStr)
{
return RemoveArrayItem(StringHelper.SplitString(s, splitStr), "", true, false);
}
/// <summary>
/// 移除字符串中的指定项
/// </summary>
/// <param name="s">源字符串</param>
/// <returns></returns>
public static string[] RemoveStringItem(string s)
{
return RemoveArrayItem(StringHelper.SplitString(s), "", true, false);
}
/// <summary>
/// 移除数组中的重复项
/// </summary>
/// <returns></returns>
public static int[] RemoveRepeaterItem(int[] array)
{
if (array == null || array.Length < 2)
return array;
Array.Sort(array);
int length = 1;
for (int i = 1; i < array.Length; i++)
{
if (array[i] != array[i - 1])
length++;
}
int[] uniqueArray = new int[length];
uniqueArray[0] = array[0];
int j = 1;
for (int i = 1; i < array.Length; i++)
if (array[i] != array[i - 1])
uniqueArray[j++] = array[i];
return uniqueArray;
}
/// <summary>
/// 移除数组中的重复项
/// </summary>
/// <returns></returns>
public static string[] RemoveRepeaterItem(string[] array)
{
if (array == null || array.Length < 2)
return array;
Array.Sort(array);
int length = 1;
for (int i = 1; i < array.Length; i++)
{
if (array[i] != array[i - 1])
length++;
}
string[] uniqueArray = new string[length];
uniqueArray[0] = array[0];
int j = 1;
for (int i = 1; i < array.Length; i++)
if (array[i] != array[i - 1])
uniqueArray[j++] = array[i];
return uniqueArray;
}
/// <summary>
/// 去除字符串中的重复元素
/// </summary>
/// <returns></returns>
public static string GetUniqueString(string s)
{
return GetUniqueString(s, ",");
}
/// <summary>
/// 去除字符串中的重复元素
/// </summary>
/// <returns></returns>
public static string GetUniqueString(string s, string splitStr)
{
return ObjectArrayToString(RemoveRepeaterItem(StringHelper.SplitString(s, splitStr)), splitStr);
}
#endregion
/// <summary>
/// 去除字符串首尾处的空格、回车、换行符、制表符
/// </summary>
public static string TBBRTrim(string str)
{
if (!string.IsNullOrEmpty(str))
return str.Trim().Trim('\r').Trim('\n').Trim('\t');
return string.Empty;
}
/// <summary>
/// 去除字符串中的空格、回车、换行符、制表符
/// </summary>
public static string ClearTBBR(string str)
{
if (!string.IsNullOrEmpty(str))
return _tbbrRegex.Replace(str, "");
return string.Empty;
}
/// <summary>
/// 删除字符串中的空行
/// </summary>
/// <returns></returns>
public static string DeleteNullOrSpaceRow(string s)
{
if (string.IsNullOrEmpty(s))
return "";
string[] tempArray = StringHelper.SplitString(s, "\r\n");
StringBuilder result = new StringBuilder();
foreach (string item in tempArray)
{
if (!string.IsNullOrWhiteSpace(item))
result.AppendFormat("{0}\r\n", item);
}
if (result.Length > 0)
result.Remove(result.Length - 2, 2);
return result.ToString();
}
/// <summary>
/// 获得指定数量的html空格
/// </summary>
/// <returns></returns>
public static string GetHtmlBS(int count)
{
if (count == 1)
return " ";
else if (count == 2)
return " ";
else if (count == 3)
return " ";
else
{
StringBuilder result = new StringBuilder();
for (int i = 0; i < count; i++)
result.Append(" ");
return result.ToString();
}
}
/// <summary>
/// 获得指定数量的htmlSpan元素
/// </summary>
/// <returns></returns>
public static string GetHtmlSpan(int count)
{
if (count <= 0)
return "";
if (count == 1)
return "<span></span>";
else if (count == 2)
return "<span></span><span></span>";
else if (count == 3)
return "<span></span><span></span><span></span>";
else
{
StringBuilder result = new StringBuilder();
for (int i = 0; i < count; i++)
result.Append("<span></span>");
return result.ToString();
}
}
/// <summary>
///获得邮箱提供者
/// </summary>
/// <param name="email">邮箱</param>
/// <returns></returns>
public static string GetEmailProvider(string email)
{
int index = email.LastIndexOf('@');
if (index > 0)
return email.Substring(index + 1);
return string.Empty;
}
/// <summary>
/// 转义正则表达式
/// </summary>
public static string EscapeRegex(string s)
{
string[] oList = { "\\", ".", "+", "*", "?", "{", "}", "[", "^", "]", "$", "(", ")", "=", "!", "<", ">", "|", ":" };
string[] eList = { "\\\\", "\\.", "\\+", "\\*", "\\?", "\\{", "\\}", "\\[", "\\^", "\\]", "\\$", "\\(", "\\)", "\\=", "\\!", "\\<", "\\>", "\\|", "\\:" };
for (int i = 0; i < oList.Length; i++)
s = s.Replace(oList[i], eList[i]);
return s;
}
/// <summary>
/// 将ip地址转换成long类型
/// </summary>
/// <param name="ip">ip</param>
/// <returns></returns>
public static long ConvertIPToLong(string ip)
{
string[] ips = ip.Split('.');
long number = 16777216L * long.Parse(ips[0]) + 65536L * long.Parse(ips[1]) + 256 * long.Parse(ips[2]) + long.Parse(ips[3]);
return number;
}
/// <summary>
/// 隐藏邮箱
/// </summary>
public static string HideEmail(string email)
{
int index = email.LastIndexOf('@');
if (index == 1)
return "*" + email.Substring(index);
if (index == 2)
return email[0] + "*" + email.Substring(index);
StringBuilder sb = new StringBuilder();
sb.Append(email.Substring(0, 2));
int count = index - 2;
while (count > 0)
{
sb.Append("*");
count--;
}
sb.Append(email.Substring(index));
return sb.ToString();
}
/// <summary>
/// 隐藏手机
/// </summary>
public static string HideMobile(string mobile)
{
if (mobile != null && mobile.Length > 10)
return mobile.Substring(0, 3) + "*****" + mobile.Substring(8);
return string.Empty;
}
/// <summary>
/// 数据转换为列表
/// </summary>
/// <param name="array">数组</param>
/// <returns></returns>
public static List<T> ArrayToList<T>(T[] array)
{
List<T> list = new List<T>(array.Length);
foreach (T item in array)
list.Add(item);
return list;
}
/// <summary>
/// DataTable转化为List
/// </summary>
/// <param name="dt">DataTable</param>
/// <returns></returns>
public static List<Dictionary<string, object>> DataTableToList(DataTable dt)
{
int columnCount = dt.Columns.Count;
List<Dictionary<string, object>> list = new List<Dictionary<string, object>>(dt.Rows.Count);
foreach (DataRow dr in dt.Rows)
{
Dictionary<string, object> item = new Dictionary<string, object>(columnCount);
for (int i = 0; i < columnCount; i++)
{
item.Add(dt.Columns[i].ColumnName, dr[i]);
}
list.Add(item);
}
return list;
}
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