/// <summary>
/// 删除首尾无意义的字符，比如空格和制表符等
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
public static string TrimMeaninglessChars(string str)
{
str = ConvertHelper.GetString(str);
if (str.Length <= 0)
{
return(str);
}
var trim = new string[] { "\n", "\t", ' '.ToString() };
while (true)
{
var len = str.Length;
foreach (var t in trim)
{
str = StringHelper.Trim(str, t, ignoreCase: true);
}
//break if trim end
var not_trimed = str.Length == len;
if (not_trimed)
{
break;
}
}
return(str);
}
/// <summary>
/// 通过给定参数生成分页html
/// </summary>
/// <param name="url"></param>
/// <param name="pageKey"></param>
/// <param name="urlParams"></param>
/// <param name="itemCount"></param>
/// <param name="page"></param>
/// <param name="pageSize"></param>
/// <returns></returns>
public static string GetPagerHtmlByData(
string url, string pageKey,
Dictionary <string, string> urlParams,
int itemCount, int page, int pageSize)
{
url = ConvertHelper.GetString(url).Trim();
if (!url.EndsWith("?"))
{
url += "?";
}
if (!ValidateHelper.IsPlumpString(pageKey))
{
pageKey = "page";
}
url += Com.DictToUrlParams(urlParams);
if (ValidateHelper.IsPlumpDict(urlParams))
{
url += "&";
}
url += pageKey + "={0}";
int pageCount = GetPageCount(itemCount, pageSize);
return(GetPagerHtml(page, pageCount, url));
}
/// <summary>
/// 比较两个json结构是否相同
/// </summary>
/// <param name="json_1"></param>
/// <param name="json_2"></param>
/// <returns></returns>
public static bool HasSameStructure(string json_1, string json_2)
{
var path_list = new List <string>();
void FindJsonNode(JToken token)
{
if (token == null)
{
return;
}
if (token.Type == JTokenType.Property)
{
path_list.Add(token.Path);
}
//find next node
var children = token.Children();
foreach (var child in children)
{
FindJsonNode(child);
}
}
FindJsonNode(JToken.Parse(json_1));
FindJsonNode(JToken.Parse(json_2));
path_list = path_list.Select(x => ConvertHelper.GetString(x).Trim()).ToList();
//这里其实有bug
//如果一个json是空，另一个是两个a.b.c(虽然不可能出现)
//就会导致两个不一样的json被判断为一样
//介于不太可能发生，就不想改了,什么时候c#内置函数支持ref再改（强迫症=.=）
return(path_list.Count == path_list.Distinct().Count() * 2);
}
/*
* string username = "******";
* byte[] buffer = System.Text.Encoding.UTF8.GetBytes(username); //这是把字符串转成字节数组
* Console.WriteLine(System.Text.Encoding.UTF8.GetString(buffer)); //这是把字节数组再转回到字符串
*
* Console.WriteLine(BitConverter.ToString(buffer)); // 这是把字节数组当作字符串输出（长度较长）
* Console.WriteLine(Convert.ToBase64String(buffer)); //这是把字节数组当作一种所谓的Base64的字符串格式输出
*/
public string GetByteString(string str, Encoding encode = null)
{
if (encode == null)
{
encode = Encoding.UTF8;
}
byte[] b = encode.GetBytes(ConvertHelper.GetString(str));
return(BitConverter.ToString(b));
}
/// <summary>
/// 截取字符串
/// </summary>
public static string SubString(string str, int startIndex, int length)
{
str = ConvertHelper.GetString(str);
if (str.Length > (startIndex + length))
{
return(str.Substring(startIndex, length));
}
return(str);
}
/// <summary>
/// 字典变url格式(a=1&b=3)
/// </summary>
public static string DictToUrlParams(IDictionary <string, string> data)
{
if (!ValidateHelper.IsPlumpDict(data))
{
return(string.Empty);
}
var arr = data.Keys.Select(x => $"{x}={ConvertHelper.GetString(data[x])}");
return(string.Join("&", arr));
}
/// <summary>
/// 提取文本中@对象 @用户
/// http://blog.csdn.net/hfut_jf/article/details/49745701
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
public static List <string> FindAtFromStr(string str)
{
var matchs = RegexHelper.FindMatchs(ConvertHelper.GetString(str), "@[\u4e00-\u9fa5a-zA-Z0-9_-]{2,30}");
var list = matchs?.Where(x => x.Success).Select(x => x.Value).Distinct().ToList();
if (list == null)
{
list = new List <string>();
}
return(list);
}
/// <summary>
/// 提取文本中的话题，格式：#话题#
/// http://blog.csdn.net/hfut_jf/article/details/49745701
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
public static List <string> FindTagsFromStr(string str)
{
var matchs = RegexHelper.FindMatchs(ConvertHelper.GetString(str), "#[^#]+#");
var list = matchs?.Where(x => x.Success).Select(x => x.Value).Distinct().ToList();
if (list == null)
{
list = new List <string>();
}
return(list);
}
/// <summary>
/// 移除前导字符串
/// </summary>
public static string TrimStart(string str, string trimStr, bool ignoreCase = true)
{
str = ConvertHelper.GetString(str);
trimStr = ConvertHelper.GetString(trimStr);
while (str.StartsWith(trimStr, ignoreCase, CultureInfo.CurrentCulture))
{
str = str.Remove(0, trimStr.Length);
}
return(str);
}
/// <summary>
/// 移除后导字符串
/// </summary>
public static string TrimEnd(string str, string trimStr, bool ignoreCase = true)
{
str = ConvertHelper.GetString(str);
trimStr = ConvertHelper.GetString(trimStr);
while (str.EndsWith(trimStr, ignoreCase, CultureInfo.CurrentCulture))
{
str = str.Substring(0, str.Length - trimStr.Length);
}
return(str);
}
/// <summary>
/// 根据attribute验证model
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="model"></param>
/// <returns></returns>
public static List <string> CheckEntity_ <T>(T model) where T : IDBTable
{
var list = new List <string>();
if (model == null)
{
list.Add("实体对象不能为Null");
return(list);
}
//checker
bool CheckProp(IEnumerable <ValidationAttribute> validators, object data, PropertyInfo p)
{
foreach (var validator in ConvertHelper.NotNullEnumerable(validators))
{
if (!validator.IsValid(data))
{
var msg = ConvertHelper.GetString(validator.ErrorMessage).Trim();
if (!ValidateHelper.IsPlumpString(msg))
{
msg = $"字段{p.Name}未通过{validator.GetType().Name}标签的验证";
}
list.Add(msg);
return(false);
}
}
return(true);
};
foreach (var prop in model.GetType().GetProperties())
{
if (prop.GetCustomAttributes <NotMappedAttribute>().Any())
{
continue;
}
var value = prop.GetValue(model);
if (!CheckProp(prop.GetCustomAttributes_ <ValidationAttribute>(), value, prop))
{
continue;
}
}
list = list.Where(x => IsPlumpString(x)).Distinct().ToList();
if (ValidateHelper.IsPlumpList(list))
{
Console.WriteLine("".Join_(list));
}
return(list);
}
/// <summary>
/// 是否是图片
/// </summary>
/// <param name="urlOrPathOrName"></param>
/// <returns></returns>
public static bool IsImage(string urlOrPathOrName)
{
urlOrPathOrName = ConvertHelper.GetString(urlOrPathOrName).Trim().ToLower();
foreach (var ext in ImageExtesions)
{
if (urlOrPathOrName.EndsWith(ext))
{
return(true);
}
}
return(false);
}
/// <summary>
/// join 不会返回空
/// </summary>
public static string Join(string spliter, IList <string> list)
{
string str = string.Empty;
if (!ValidateHelper.IsPlumpList(list))
{
return(str);
}
list.ToList().ForEach(delegate(string s)
{
s = ConvertHelper.GetString(s);
str += ((str == string.Empty) ? string.Empty : spliter) + s;
});
return(str);
}
/// <summary>
/// 根据attribute验证model
/// </summary>
public static List <string> CheckEntity_ <T>(T model) where T : IDBTable
{
if (model == null)
{
throw new ArgumentNullException(nameof(model));
}
var list = new List <string>();
//checker
bool CheckProp(IEnumerable <ValidationAttribute> validators, PropertyInfo p)
{
var data = p.GetValue(model);
foreach (var validator in ConvertHelper.NotNullList(validators))
{
if (!validator.IsValid(data))
{
var msg = ConvertHelper.GetString(validator.ErrorMessage).Trim();
if (!ValidateHelper.IsPlumpString(msg))
{
msg = $"字段{p.Name}未通过{validator.GetType().Name}标签的验证";
}
list.Add(msg);
return(false);
}
}
return(true);
};
foreach (var prop in model.GetType().GetProperties())
{
if (prop.HasCustomAttributes_ <NotMappedAttribute>(inherit: false))
{
continue;
}
//忽略父级的验证属性
var validators = prop.GetCustomAttributes_ <ValidationAttribute>(inherit: false);
if (!CheckProp(validators, prop))
{
continue;
}
}
list = list.NotEmptyAndDistinct(x => x).ToList();
return(list);
}
/// <summary>
/// 筛选+排序
/// </summary>
public static SortedDictionary <string, string> FilterAndSort(Dictionary <string, string> dict, string sign_key, IComparer <string> comparer)
{
Func <KeyValuePair <string, string>, bool> filter = x =>
{
if (x.Key == null || x.Key == sign_key || x.Key.Length > 32 || x.Value?.Length > 32)
{
return(false);
}
else
{
return(true);
}
};
var filtered = dict.Where(x => filter(x)).ToDictionary(x => x.Key, x => ConvertHelper.GetString(x.Value));
return(new SortedDictionary <string, string>(filtered, comparer));
}
/// <summary>
/// 获取MD5
/// </summary>
/// <param name="str"></param>
/// <param name="getShort"></param>
/// <returns></returns>
public static string GetMD5(string str, bool getShort = false)
{
using (var md5 = new MD5CryptoServiceProvider())
{
byte[] bytes_md5_in = Encoding.UTF8.GetBytes(str);
//把字节数组（byte[]）转换成16进制
string md5_ret = BitConverter.ToString(md5.ComputeHash(bytes_md5_in));
md5_ret = ConvertHelper.GetString(md5_ret).Trim().Replace("-", "");
if (md5_ret.Length != 32)
{
return(string.Empty);
}
if (getShort)
{
return(md5_ret.Substring(8, 16));
}
return(md5_ret);
}
}
/// <summary>
/// 格式化数字格式
/// </summary>
/// <param name="num"></param>
/// <returns></returns>
public static string FormatNumber(string num)
{
var sp = ConvertHelper.GetString(num).Split('.');
if (sp.Length != 2)
{
return(num);
}
var right = ConvertHelper.GetString(sp[1]);
right = right.TrimEnd('0');
var left = sp[0];
if (ValidateHelper.IsNotEmpty(right))
{
left += "." + right;
}
return(left);
}
/// <summary>
/// 简单判断是否是json，不一定全部正确
/// </summary>
/// <param name="json"></param>
/// <returns></returns>
public static bool IsJson(string json)
{
json = ConvertHelper.GetString(json);
return((json.StartsWith("{") && json.EndsWith("}")) ||
(json.StartsWith("[") && json.EndsWith("]")));
}
/// <summary>
/// 可能返回空
/// </summary>
/// <param name="str"></param>
/// <param name="spliter"></param>
/// <returns></returns>
public static List <string> Split(string str, params char[] spliter)
{
return(ConvertHelper.GetString(str).Split(spliter).ToList());
}
/// <summary>
/// 判断字符串的长度是否在范围之内，str可以为空
/// </summary>
/// <param name="str"></param>
/// <param name="min"></param>
/// <param name="max"></param>
/// <param name="withBorder"></param>
/// <returns></returns>
public static bool IsLenInRange(string str, int min, int max)
{
str = ConvertHelper.GetString(str);
return(str.Length >= min && str.Length <= max);
}
/// <summary>
/// 把对象可读属性读出来变成字典
/// </summary>
/// <param name="data"></param>
/// <returns></returns>
public static Dictionary <string, string> ObjectToStringDict(object data)
{
return(ObjectToDict_(data).ToDictionary(x => x.Key, x => ConvertHelper.GetString(x.Value)));
}
/// <summary>
/// 获取字符前几位，并加省略号
/// </summary>
/// <param name="str"></param>
/// <param name="len"></param>
/// <returns></returns>
public static string GetPreviewString(string str, int len)
{
str = ConvertHelper.GetString(str);
return((str.Length <= len) ? str : str.Substring(0, len) + "...");
}
/// <summary> /// 获取请求ID /// </summary> /// <returns></returns> public static string GetRequestID() => ConvertHelper.GetString(HttpContext.Current.Items["req_guid"]);