添加项目文件。

Atomx.Utils/Extension/StringExtension.cs

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+using System.Security.Cryptography;
+using System.Text;
+using System.Web;
+
+namespace Atomx.Utils.Extension
+{
+    public static class StringExtension
+    {
+        // <summary>
+        /// MD5加密，输出的字母是大写
+        /// </summary>
+        /// <param name="text"></param>
+        /// <returns></returns>
+        public static string ToMD5(this string text)
+        {
+            MD5 md5 = MD5.Create();
+            return BitConverter.ToString(md5.ComputeHash(Encoding.UTF8.GetBytes(text))).Replace("-", "");
+        }
+
+        /// <summary>
+        /// 字符串加密为通用的密码
+        /// </summary>
+        /// <param name="text"></param>
+        /// <returns></returns>
+        public static string ToMd5Password(this string text)
+        {
+            var md5 = text.ToMD5().ToMD5();
+            return md5;
+        }
+
+        /// <summary>
+        /// 随机数字字符串
+        /// </summary>
+        /// <param name="length"></param>
+        /// <returns></returns>
+        public static string GetRandomNumberString(int length)
+        {
+            string buffer = "0123456789";
+            StringBuilder sb = new StringBuilder();
+            Random r = new Random();
+            int range = buffer.Length;
+            for (var i = 0; i < length; i++)
+            {
+                sb.Append(buffer.Substring(r.Next(range), 1));
+            }
+            return sb.ToString();
+        }
+
+        /// <summary>
+        /// 随机数字字符串
+        /// </summary>
+        /// <param name="length"></param>
+        /// <returns></returns>
+        public static string GetRandomString(int length)
+        {
+            string buffer = "abcdefghijklmnopqrstuvwxyz";
+            StringBuilder sb = new StringBuilder();
+            Random r = new Random();
+            int range = buffer.Length;
+            for (var i = 0; i < length; i++)
+            {
+                sb.Append(buffer.Substring(r.Next(range), 1));
+            }
+            return sb.ToString();
+        }
+
+
+        /// <summary>
+        /// 获取URL参数字段值
+        /// </summary>
+        /// <param name="queryString"></param>
+        /// <param name="paramName"></param>
+        /// <returns></returns>
+        public static string GetQueryString(this string queryString, string paramName)
+        {
+            if (string.IsNullOrEmpty(queryString) || string.IsNullOrEmpty(paramName))
+            {
+                return "";
+            }
+            string paramValue = HttpUtility.ParseQueryString(queryString).Get(paramName)?.ToString() ?? string.Empty;
+            return paramValue ?? "";
+        }
+
+        /// <summary>
+        /// 转换URL参数
+        /// </summary>
+        /// <param name="source"></param>
+        /// <returns></returns>
+        public static string BuildQueryString(this object source)
+        {
+            var buff = new StringBuilder(string.Empty);
+            if (source == null)
+                return buff.ToString();
+
+
+            var modelDict = source.GetType().GetProperties().ToDictionary(a => a.Name.ToLower());
+            foreach (var item in modelDict)
+            {
+                if (item.Value.PropertyType != typeof(DateTime?[]))
+                {
+                    System.Reflection.PropertyInfo? pi = null;
+                    if (modelDict.TryGetValue(item.Key, out pi))
+                    {
+                        object? obj = pi.GetValue(source, null);
+                        if (pi != null && obj != null)
+                        {
+                            var value = obj.ToString();
+                            if (!string.IsNullOrEmpty(value))
+                            {
+                                buff.Append($"{item.Key}={value}&");
+                            }
+                        }
+                    }
+                }
+                else
+                {
+                    System.Reflection.PropertyInfo? pi = null;
+                    if (modelDict.TryGetValue(item.Key, out pi))
+                    {
+                        object? obj = pi.GetValue(source, null);
+                        if (pi != null && obj != null)
+                        {
+                            var data = obj as DateTime?[];
+                            if (data != null)
+                            {
+                                long start = 0;
+                                long end = 0;
+                                if (data[0].HasValue) {
+                                    var time1 = data[0].Value.ConvertStartDateTime();
+                                    start = time1.DateToNumber();
+                                }
+                                if (data[1].HasValue)
+                                {
+                                    var time1 = data[1].Value.ConvertEndDateTime();
+                                    end = time1.DateToNumber();
+                                }
+                                if (start > 0 && end > 0)
+                                {
+                                    buff.Append($"{item.Key}={start}-{end}&");
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+            return buff.ToString().Trim('&');
+        }
+
+        /// <summary>
+        /// url参数转换成字典
+        /// </summary>
+        /// <param name="formData"></param>
+        /// <returns></returns>
+        public static Dictionary<string, object> ToUrlDictionary(this string formData)
+        {
+            if (string.IsNullOrEmpty(formData))
+            {
+                return new Dictionary<string, object>();
+            }
+            try
+            {
+                //将参数存入字符数组
+                string[] dataArry = formData.Split('&');
+
+                //定义字典,将参数按照键值对存入字典中
+                Dictionary<string, object> dataDic = new Dictionary<string, object>();
+                //遍历字符数组
+                for (int i = 0; i <= dataArry.Length - 1; i++)
+                {
+                    //当前参数值
+                    string dataParm = dataArry[i];
+                    //"="的索引值
+                    int dIndex = dataParm.IndexOf("=");
+                    //参数名作为key
+                    string key = dataParm.Substring(0, dIndex);
+                    //参数值作为Value
+                    string value = dataParm.Substring(dIndex + 1, dataParm.Length - dIndex - 1);
+                    //将编码后的Value解码
+                    string deValue = HttpUtility.UrlDecode(value, Encoding.GetEncoding("utf-8"));
+                    if (key != "__VIEWSTATE")
+                    {
+                        //将参数以键值对存入字典
+                        dataDic.Add(key, deValue);
+                    }
+                }
+
+                return dataDic;
+            }
+            catch (Exception)
+            {
+                return new Dictionary<string, object>();
+            }
+        }
+    }
+}