using System;2
using System.Collections.Generic;3
using System.Text.RegularExpressions;4
using System.Text;5

6

7
namespace InsApp.word8
{9
/// <summary>10
/// string CreateRandomCode(int codeCount) 根据长度生成随机的数字和字母11
/// bool toFilter(string thePara) 检测非法字符,如果参数是空/包含非法字符,返回false/否则返回 true12
/// bool CheckNumber(string GetNum) 判断是否是数字格式13
/// bool CheckNumberRegx(string GetNum) 判断是否是正负数字含小数14
/// bool CheckNullstr(string Getstr) 判断是否是空值null 返回true || false15
/// </summary>16
public class CreateCode17
{18
生成随机的数字和字母 codeCount是希望生成的长度45

46
判断是否是数字格式65

66
检测非法字符,防止sql注入104

105
bool CheckNullstr(string Getstr)判断是否是空值131

132
#region bool CheckNumberRegx(string GetNum)正则表达式 判断是否是正负数字含小数133
/// <summary>134
/// 判断是否是数字格式135
/// </summary>136
/// <param name="GetNum"></param>137
public bool CheckNumberRegx(string GetNum)138
{139
//^[+-]?\d+(\.\d+)?$正负数字含小数 数字含小数^\d+(\.\d+)?$140
Regex r = new Regex(@"^\d+(\.\d+)?$");141
if (r.IsMatch(GetNum))142
{143
return true;144
}145
else146
{147
return false;148
}149
}150
#endregion151

152
#region 用C#截取指定长度的中英文混合字符串153
/// <summary>154
/// s接受的字符155
/// l长度156
/// </summary>157
/// <param name="s"></param>158
/// <param name="l"></param>159
/// <returns></returns>160
public static string CutStr(string s, int l)161
{162
string temp = s;163
if (Regex.Replace(temp, "[\u4e00-\u9fa5]", "zz", RegexOptions.IgnoreCase).Length <= l)164
{165
return temp;166
}167
for (int i = temp.Length; i >= 0; i--)168
{169
temp = temp.Substring(0, i);170
if (Regex.Replace(temp, "[\u4e00-\u9fa5]", "zz", RegexOptions.IgnoreCase).Length <= l - 3)171
{172
return temp + "";173
}174
}175
return "";176
}177
#endregion178

179
#region 数字和字母随机数180
/// <summary>181
/// 数字和字母随机数182
/// </summary>183
/// <param name="n">生成长度</param>184
/// <returns></returns>185
public static string Rand_Number_AZ_Code(int n)186
{187
char[] arrChar = new char[]{188
'a','b','d','c','e','f','g','h','i','j','k','l','m','n','p','r','q','s','t','u','v','w','z','y','x',189
'0','1','2','3','4','5','6','7','8','9',190
'A','B','C','D','E','F','G','H','I','J','K','L','M','N','Q','P','R','T','S','V','U','W','X','Y','Z'191
};192

193
StringBuilder num = new StringBuilder();194

195
Random rnd = new Random(DateTime.Now.Millisecond);196
for (int i = 0; i < n; i++)197
{198
num.Append(arrChar[rnd.Next(0, arrChar.Length)].ToString());199
}200

201
return num.ToString();202
}203
#endregion204

205
#region 字母随机数206
/// <summary>207
/// 字母随机数208
/// </summary>209
/// <param name="n">生成长度</param>210
/// <returns></returns>211
public static string RandLetter(int n)212
{213
char[] arrChar = new char[]{214
'a','b','d','c','e','f','g','h','i','j','k','l','m','n','p','r','q','s','t','u','v','w','z','y','x',215
'A','B','C','D','E','F','G','H','I','J','K','L','M','N','Q','P','R','T','S','V','U','W','X','Y','Z'216
};217

218
StringBuilder num = new StringBuilder();219

220
Random rnd = new Random(DateTime.Now.Millisecond);221
for (int i = 0; i < n; i++)222
{223
num.Append(arrChar[rnd.Next(0, arrChar.Length)].ToString());224

225
}226

227
return num.ToString();228
}229
#endregion230

231
#region 日期随机函数232
/// <summary>233
/// 日期随机函数234
/// </summary>235
/// <param name="ra">长度</param>236
/// <returns></returns>237
public static string DateRndName(Random ra)238
{239
DateTime d = DateTime.Now;240
string s = null, y, m, dd, h, mm, ss;241
y = d.Year.ToString();242
m = d.Month.ToString();243
if (m.Length < 2) m = "0" + m;244
dd = d.Day.ToString();245
if (dd.Length < 2) dd = "0" + dd;246
h = d.Hour.ToString();247
if (h.Length < 2) h = "0" + h;248
mm = d.Minute.ToString();249
if (mm.Length < 2) mm = "0" + mm;250
ss = d.Second.ToString();251
if (ss.Length < 2) ss = "0" + ss;252
s += y + m + dd + h + mm + ss;253
s += ra.Next(100, 999).ToString();254
return s;255
}256
#endregion257

258
#region 生成GUID259
/// <summary>260
/// 生成GUID261
/// </summary>262
/// <returns></returns>263
public static string GetGuid()264
{265
System.Guid g = System.Guid.NewGuid();266
return g.ToString();267
}268
#endregion269
}270
}271
由枚举值生成数组,可以用于绑定到ComboBox上或者DropDownList。
class Utils
{
public static object[] GetEnumValues(Type type)
{
List<object> list = new List<object>();
for (int i = 0; ; i++)
{
string val = Enum.GetName(type, i);
if (!string.IsNullOrEmpty(val))
list.Add(val);
else
break;
}
return list.ToArray();
}
}
{
public static object[] GetEnumValues(Type type)
{
List<object> list = new List<object>();
for (int i = 0; ; i++)
{
string val = Enum.GetName(type, i);
if (!string.IsNullOrEmpty(val))
list.Add(val);
else
break;
}
return list.ToArray();
}
}
使用:
object[] list = Utils.GetEnumValues(typeof(ChartType))

