From 98b61a736061421dc2b9a2f97a28376d440c3761 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E4=B8=8D=E5=81=9A=E7=A0=81=E5=86=9C?= <599854767@qq.com>
Date: Tue, 28 Dec 2021 20:51:52 +0800
Subject: [PATCH] =?UTF-8?q?=E6=96=B0=E5=A2=9E=E9=A6=96=E5=AD=97=E6=AF=8D?=
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---
 Infrastructure/Extensions/StringExtension.cs | 67 +++++++++++++++++++-
 1 file changed, 66 insertions(+), 1 deletion(-)

diff --git a/Infrastructure/Extensions/StringExtension.cs b/Infrastructure/Extensions/StringExtension.cs
index 60315e2..46c1baa 100644
--- a/Infrastructure/Extensions/StringExtension.cs
+++ b/Infrastructure/Extensions/StringExtension.cs
@@ -39,7 +39,72 @@ namespace Infrastructure.Extensions
         {
             Regex regEx = new Regex(oldValue, RegexOptions.Multiline);
             return regEx.Replace(input, newValue == null ? "" : newValue, 1);
-
         }
+
+        /// <summary>
+        /// 骆驼峰转下划线
+        /// </summary>
+        /// <param name="name"></param>
+        /// <returns></returns>
+        public static string ToSmallCamelCase(string name)
+        {
+            var stringBuilder = new StringBuilder();
+            stringBuilder.Append(name.Substring(0, 1).ToLower());
+
+            for (var i = 0; i < name.Length; i++)
+            {
+                if (i == 0)
+                {
+                    stringBuilder.Append(name.Substring(0, 1).ToLower());
+                }
+                else
+                {
+                    if (name[i] >= 'A' && name[i] <= 'Z')
+                    {
+                        stringBuilder.Append($"_{name.Substring(i, 1).ToLower()}");
+                    }
+                    else
+                    {
+                        stringBuilder.Append(name[i]);
+                    }
+                }
+            }
+
+            return stringBuilder.ToString();
+        }
+
+        /// <summary>
+        /// 下划线命名转驼峰命名
+        /// </summary>
+        /// <param name="underscore"></param>
+        /// <returns></returns>
+        public static string UnderScoreToCamelCase(this string underscore)
+        {
+            string[] ss = underscore.Split("_");
+            if (ss.Length == 1)
+            {
+                return underscore;
+            }
+
+            StringBuilder sb = new StringBuilder();
+            sb.Append(ss[0]);
+            for (int i = 1; i < ss.Length; i++)
+            {
+                sb.Append(ss[i].FirstUpperCase());
+            }
+
+            return sb.ToString();
+        }
+
+        /// <summary>
+        /// 首字母转大写
+        /// </summary>
+        /// <param name="str"></param>
+        /// <returns></returns>
+        public static string FirstUpperCase(this string str)
+        {
+            return string.IsNullOrEmpty(str) ? str : str.Substring(0, 1).ToUpper() + str[1..];
+        }
+
     }
 }