#region 生成日期随机码
2 /// <summary>
3 /// 生成日期随机码
4 /// </summary>
5 /// <returns></returns>
6 public static string GetRamCode()
7 {
8 #region
9 return DateTime.Now.ToString("yyyyMMddHHmmssffff");
10 #endregion
11 }
12 #endregion
#region 生成随机字母或数字
2 /// <summary>
3 /// 生成随机数字
4 /// </summary>
5 /// <param name="length">生成长度</param>
6 /// <returns></returns>
7 public static string Number(int Length)
8 {
9 return Number(Length, false);
10 }
11
12 /// <summary>
13 /// 生成随机数字
14 /// </summary>
15 /// <param name="Length">生成长度</param>
16 /// <param name="Sleep">是否要在生成前将当前线程阻止以避免重复</param>
17 /// <returns></returns>
18 public static string Number(int Length, bool Sleep)
19 {
20 if (Sleep)
21 System.Threading.Thread.Sleep(3);
22 string result = "";
23 System.Random random = new Random();
24 for (int i = 0; i < Length; i++)
25 {
26 result += random.Next(10).ToString();
27 }
28 return result;
29 }
30 /// <summary>
31 /// 生成随机字母字符串(数字字母混和)
32 /// </summary>
33 /// <param name="codeCount">待生成的位数</param>
34 public static string GetCheckCode(int codeCount)
35 {
36 string str = string.Empty;
37 int rep = 0;
38 long num2 = DateTime.Now.Ticks + rep;
39 rep++;
40 Random random = new Random(((int)(((ulong)num2) & 0xffffffffL)) | ((int)(num2 >> rep)));
41 for (int i = 0; i < codeCount; i++)
42 {
43 char ch;
44 int num = random.Next();
45 if ((num % 2) == 0)
46 {
47 ch = (char)(0x30 + ((ushort)(num % 10)));
48 }
49 else
50 {
51 ch = (char)(0x41 + ((ushort)(num % 0x1a)));
52 }
53 str = str + ch.ToString();
54 }
55 return str;
56 }
57 /// <summary>
58 /// 根据日期和随机码生成订单号
59 /// </summary>
60 /// <returns></returns>
61 public static string GetOrderNumber()
62 {
63 string num = DateTime.Now.ToString("yyMMddHHmmss");//yyyyMMddHHmmssms
64 return num + Number(2).ToString();
65 }
66 private static int Next(int numSeeds, int length)
67 {
68 byte[] buffer = new byte[length];
69 System.Security.Cryptography.RNGCryptoServiceProvider Gen = new System.Security.Cryptography.RNGCryptoServiceProvider();
70 Gen.GetBytes(buffer);
71 uint randomResult = 0x0;//这里用uint作为生成的随机数
72 for (int i = 0; i < length; i++)
73 {
74 randomResult |= ((uint)buffer[i] << ((length - 1 - i) * 8));
75 }
76 return (int)(randomResult % numSeeds);
77 }
78 #endregion
#region 截取字符长度
2 /// <summary>
3 /// 截取字符长度
4 /// </summary>
5 /// <param name="inputString">字符</param>
6 /// <param name="len">长度</param>
7 /// <returns></returns>
8 public static string CutString(string inputString, int len)
9 {
10 if (string.IsNullOrEmpty(inputString))
11 return "";
12 inputString = DropHTML(inputString);
13 ASCIIEncoding ascii = new ASCIIEncoding();
14 int tempLen = 0;
15 string tempString = "";
16 byte[] s = ascii.GetBytes(inputString);
17 for (int i = 0; i < s.Length; i++)
18 {
19 if ((int)s[i] == 63)
20 {
21 tempLen += 2;
22 }
23 else
24 {
25 tempLen += 1;
26 }
27
28 try
29 {
30 tempString += inputString.Substring(i, 1);
31 }
32 catch
33 {
34 break;
35 }
36
37 if (tempLen > len)
38 break;
39 }
40 //如果截过则加上半个省略号
41 byte[] mybyte = System.Text.Encoding.Default.GetBytes(inputString);
42 if (mybyte.Length > len)
43 tempString += "…";
44 return tempString;
45 }
46 #endregion
#region 对象<-->JSON 4.0使用
2 /// <summary>
3 /// 对象转JSON
4 /// </summary>
5 /// <typeparam name="T">对象实体</typeparam>
6 /// <param name="t">内容</param>
7 /// <returns>json包</returns>
8 public static string ObjetcToJson<T>(T t)
9 {
10 try
11 {
12 DataContractJsonSerializer json = new DataContractJsonSerializer(typeof(T));
13 string szJson = "";
14 using (MemoryStream stream = new MemoryStream())
15 {
16 json.WriteObject(stream, t);
17 szJson = Encoding.UTF8.GetString(stream.ToArray());
18 }
19 return szJson;
20 }
21 catch { return ""; }
22 }
23
24 /// <summary>
25 /// Json包转对象
26 /// </summary>
27 /// <typeparam name="T">对象</typeparam>
28 /// <param name="jsonstring">json包</param>
29 /// <returns>异常抛null</returns>
30 public static object JsonToObject<T>(string jsonstring)
31 {
32 object result = null;
33 try
34 {
35 DataContractJsonSerializer json = new DataContractJsonSerializer(typeof(T));
36 using (MemoryStream stream = new MemoryStream(Encoding.UTF8.GetBytes(jsonstring)))
37 {
38 result = json.ReadObject(stream);
39 }
40 return result;
41 }
42 catch { return result; }
43 }
44 #endregion
#region 对象<-->JSON 2.0 使用litjson插件
2 /// <summary>
3 /// 对象转JSON jsonData
4 /// </summary>
5 /// <typeparam name="T"></typeparam>
6 /// <param name="t"></param>
7 /// <returns></returns>
8 //public static string ObjetcToJsonData<T>(T t)
9 //{
10 // try
11 // {
12 // JsonData json = new JsonData(t);
13 // return json.ToJson();
14 // }
15 // catch
16 // {
17 // return "";
18 // }
19 //}
20
21 ///// <summary>
22 ///// 对象转JSON jsonMapper
23 ///// </summary>
24 ///// <typeparam name="T"></typeparam>
25 ///// <param name="t"></param>
26 ///// <returns></returns>
27 //public static string ObjetcToJsonMapper<T>(T t)
28 //{
29 // try
30 // {
31 // JsonData json = JsonMapper.ToJson(t);
32 // return json.ToJson();
33 // }
34 // catch
35 // {
36 // return "";
37 // }
38 //}
39
40 ///// <summary>
41 ///// json转对象 jsonMapper
42 ///// </summary>
43 ///// <param name="jsons"></param>
44 ///// <returns></returns>
45 //public static object JsonToObject(string jsons)
46 //{
47 // try
48 // {
49 // JsonData jsonObject = JsonMapper.ToObject(jsons);
50 // return jsonObject;
51 // }
52 // catch { return null; }
53 //}
54
55 #endregion
#region DataTable<-->JSON
2 /// <summary>
3 /// DataTable转为json
4 /// </summary>
5 /// <param name="dt">DataTable</param>
6 /// <returns>json数据</returns>
7 public static string DataTableToJson(DataTable dt)
8 {
9 List<Dictionary<string, object>> list = new List<Dictionary<string, object>>();
10 foreach (DataRow dr in dt.Rows)
11 {
12 Dictionary<string, object> result = new Dictionary<string, object>();
13 foreach (DataColumn dc in dt.Columns)
14 {
15 result.Add(dc.ColumnName, dr[dc]);
16 }
17 list.Add(result);
18 }
19
20 return SerializeToJson(list);
21 }
22 /// <summary>
23 /// 序列化对象为Json字符串
24 /// </summary>
25 /// <param name="obj">要序列化的对象</param>
26 /// <param name="recursionLimit">序列化对象的深度，默认为100</param>
27 /// <returns>Json字符串</returns>
28 public static string SerializeToJson(object obj, int recursionLimit = 100)
29 {
30 try
31 {
32 JavaScriptSerializer serialize = new JavaScriptSerializer();
33 serialize.RecursionLimit = recursionLimit;
34 return serialize.Serialize(obj);
35 }
36 catch { return ""; }
37 }
38 /// <summary>
39 /// json包转DataTable
40 /// </summary>
41 /// <param name="jsons"></param>
42 /// <returns></returns>
43 public static DataTable JsonToDataTable(string jsons)
44 {
45 DataTable dt = new DataTable();
46 try
47 {
48 JavaScriptSerializer serialize = new JavaScriptSerializer();
49 serialize.MaxJsonLength = Int32.MaxValue;
50 ArrayList list = serialize.Deserialize<ArrayList>(jsons);
51 if (list.Count > 0)
52 {
53 foreach (Dictionary<string, object> item in list)
54 {
55 if (item.Keys.Count == 0)//无值返回空
56 {
57 return dt;
58 }
59 if (dt.Columns.Count == 0)//初始Columns
60 {
61 foreach (string current in item.Keys)
62 {
63 dt.Columns.Add(current, item[current].GetType());
64 }
65 }
66 DataRow dr = dt.NewRow();
67 foreach (string current in item.Keys)
68 {
69 dr[current] = item[current];
70 }
71 dt.Rows.Add(dr);
72 }
73 }
74 }
75 catch
76 {
77 return dt;
78 }
79 return dt;
80 }
81 #endregion
#region List<--->DataTable
2 /// <summary>
3 /// DataTable转换泛型集合
4 /// </summary>
5 /// <typeparam name="T"></typeparam>
6 /// <param name="table"></param>
7 /// <returns></returns>
8 public static List<T> DataTableToList<T>(DataTable table)
9 {
10 List<T> list = new List<T>();
11 T t = default(T);
12 PropertyInfo[] propertypes = null;
13 string tempName = string.Empty;
14 foreach (DataRow row in table.Rows)
15 {
16 t = Activator.CreateInstance<T>();
17 propertypes = t.GetType().GetProperties();
18 foreach (PropertyInfo pro in propertypes)
19 {
20 tempName = pro.Name;
21 if (table.Columns.Contains(tempName))
22 {
23 object value = row[tempName];
24 if (!value.ToString().Equals(""))
25 {
26 pro.SetValue(t, value, null);
27 }
28 }
29 }
30 list.Add(t);
31 }
32 return list.Count == 0 ? null : list;
33 }
34
35 /// <summary>
36 /// 将集合类转换成DataTable
37 /// </summary>
38 /// <param name="list">集合</param>
39 /// <returns>DataTable</returns>
40 public static DataTable ListToDataTable(IList list)
41 {
42 DataTable result = new DataTable();
43 if (list != null && list.Count > 0)
44 {
45 PropertyInfo[] propertys = list[0].GetType().GetProperties();
46 foreach (PropertyInfo pi in propertys)
47 {
48 result.Columns.Add(pi.Name, pi.PropertyType);
49 }
50 for (int i = 0; i < list.Count; i++)
51 {
52 ArrayList tempList = new ArrayList();
53 foreach (PropertyInfo pi in propertys)
54 {
55 object obj = pi.GetValue(list[i], null);
56 tempList.Add(obj);
57 }
58 object[] array = tempList.ToArray();
59 result.LoadDataRow(array, true);
60 }
61 }
62 return result;
63 }
64 public static List<T> ConvertTo<T>(DataTable dt) where T : new()
65 {
66 if (dt == null) return null;
67 if (dt.Rows.Count <= 0) return null;
68
69 List<T> list = new List<T>();
70 try
71 {
72 List<string> columnsName = new List<string>();
73 foreach (DataColumn dataColumn in dt.Columns)
74 {
75 columnsName.Add(dataColumn.ColumnName);//得到所有的表头
76 }
77 list = dt.AsEnumerable().ToList().ConvertAll<T>(row => GetObject<T>(row, columnsName)); //转换
78 return list;
79 }
80 catch
81 {
82 return null;
83 }
84 }
85
86 public static T GetObject<T>(DataRow row, List<string> columnsName) where T : new()
87 {
88 T obj = new T();
89 try
90 {
91 string columnname = "";
92 string value = "";
93 PropertyInfo[] Properties = typeof(T).GetProperties();
94 foreach (PropertyInfo objProperty in Properties) //遍历T的属性
95 {
96 columnname = columnsName.Find(name => name.ToLower() == objProperty.Name.ToLower()); //寻找可以匹配的表头名称
97 if (!string.IsNullOrEmpty(columnname))
98 {
99 value = row[columnname].ToString();
100 if (!string.IsNullOrEmpty(value))
101 {
102 if (Nullable.GetUnderlyingType(objProperty.PropertyType) != null) //存在匹配的表头
103 {
104 value = row[columnname].ToString().Replace("$", "").Replace(",", ""); //从dataRow中提取数据
105 objProperty.SetValue(obj, Convert.ChangeType(value, Type.GetType(Nullable.GetUnderlyingType(objProperty.PropertyType).ToString())), null); //赋值操作
106 }
107 else
108 {
109 value = row[columnname].ToString().Replace("%", ""); //存在匹配的表头
110 objProperty.SetValue(obj, Convert.ChangeType(value, Type.GetType(objProperty.PropertyType.ToString())), null);//赋值操作
111 }
112 }
113 }
114 }
115 return obj;
116 }
117 catch
118 {
119 return obj;
120 }
121 }
122 /// <summary>
123 /// 将泛型集合类转换成DataTable
124 /// </summary>
125 /// <typeparam name="T">集合项类型</typeparam>
126 /// <param name="list">集合</param>
127 /// <param name="propertyName">需要返回的列的列名</param>
128 /// <returns>数据集(表)</returns>
129 public static DataTable ListToDataTable<T>(IList<T> list, params string[] propertyName)
130 {
131 List<string> propertyNameList = new List<string>();
132 if (propertyName != null)
133 propertyNameList.AddRange(propertyName);
134 DataTable result = new DataTable();
135 if (list != null && list.Count > 0)
136 {
137 PropertyInfo[] propertys = list[0].GetType().GetProperties();
138 foreach (PropertyInfo pi in propertys)
139 {
140 if (propertyNameList.Count == 0)
141 {
142 result.Columns.Add(pi.Name, pi.PropertyType);
143 }
144 else
145 {
146 if (propertyNameList.Contains(pi.Name))
147 result.Columns.Add(pi.Name, pi.PropertyType);
148 }
149 }
150 for (int i = 0; i < list.Count; i++)
151 {
152 ArrayList tempList = new ArrayList();
153 foreach (PropertyInfo pi in propertys)
154 {
155 if (propertyNameList.Count == 0)
156 {
157 object obj = pi.GetValue(list[i], null);
158 tempList.Add(obj);
159 }
160 else
161 {
162 if (propertyNameList.Contains(pi.Name))
163 {
164 object obj = pi.GetValue(list[i], null);
165 tempList.Add(obj);
166 }
167 }
168 }
169 object[] array = tempList.ToArray();
170 result.LoadDataRow(array, true);
171 }
172 }
173 return result;
174 }
175
176 #endregion
#region 清除HTML标记
2 public static string DropHTML(string Htmlstring)
3 {
4 if (string.IsNullOrEmpty(Htmlstring)) return "";
5 //删除脚本
6 Htmlstring = Regex.Replace(Htmlstring, @"<script[^>]*?>.*?</script>", "", RegexOptions.IgnoreCase);
7 //删除HTML
8 Htmlstring = Regex.Replace(Htmlstring, @"<(.[^>]*)>", "", RegexOptions.IgnoreCase);
9 Htmlstring = Regex.Replace(Htmlstring, @"([\r\n])[\s]+", "", RegexOptions.IgnoreCase);
10 Htmlstring = Regex.Replace(Htmlstring, @"-->", "", RegexOptions.IgnoreCase);
11 Htmlstring = Regex.Replace(Htmlstring, @"<!--.*", "", RegexOptions.IgnoreCase);
12 Htmlstring = Regex.Replace(Htmlstring, @"&(quot|#34);", "\"", RegexOptions.IgnoreCase);
13 Htmlstring = Regex.Replace(Htmlstring, @"&(amp|#38);", "&", RegexOptions.IgnoreCase);
14 Htmlstring = Regex.Replace(Htmlstring, @"&(lt|#60);", "<", RegexOptions.IgnoreCase);
15 Htmlstring = Regex.Replace(Htmlstring, @"&(gt|#62);", ">", RegexOptions.IgnoreCase);
16 Htmlstring = Regex.Replace(Htmlstring, @"&(nbsp|#160);", " ", RegexOptions.IgnoreCase);
17 Htmlstring = Regex.Replace(Htmlstring, @"&(iexcl|#161);", "\xa1", RegexOptions.IgnoreCase);
18 Htmlstring = Regex.Replace(Htmlstring, @"&(cent|#162);", "\xa2", RegexOptions.IgnoreCase);
19 Htmlstring = Regex.Replace(Htmlstring, @"&(pound|#163);", "\xa3", RegexOptions.IgnoreCase);
20 Htmlstring = Regex.Replace(Htmlstring, @"&(copy|#169);", "\xa9", RegexOptions.IgnoreCase);
21
22 Htmlstring = Regex.Replace(Htmlstring, @"&#(\d+);", "", RegexOptions.IgnoreCase);
23 Htmlstring.Replace("<", "");
24 Htmlstring.Replace(">", "");
25 Htmlstring.Replace("\r\n", "");
26 Htmlstring = HttpContext.Current.Server.HtmlEncode(Htmlstring).Trim();
27 return Htmlstring;
28 }
29 #endregion
原文：http://www.cnblogs.com/zhangxiaolei521/p/5808665.html