添加项目文件。

common/Tnb.Common/Extension/StringBuilderExtensions.cs

@@ -0,0 +1,170 @@
+using JNPF.DependencyInjection;
+using System.Text;
+
+namespace JNPF.Common.Extension;
+
+/// <summary>
+/// StringBuilder 扩展方法类.
+/// </summary>
+[SuppressSniffer]
+public static class StringBuilderExtensions
+{
+    /// <summary>
+    /// 去除<seealso cref="StringBuilder"/>开头的空格.
+    /// </summary>
+    /// <param name="sb">StringBuilder.</param>
+    /// <returns>返回修改后的StringBuilder，主要用于链式操作.</returns>
+    public static StringBuilder TrimStart(this StringBuilder sb)
+    {
+        return sb.TrimStart(' ');
+    }
+
+    /// <summary>
+    /// 去除<seealso cref="StringBuilder"/>开头的指定<seealso cref="char"/>.
+    /// </summary>
+    /// <param name="sb">StringBuilder.</param>
+    /// <param name="c">要去掉的<seealso cref="char"/>.</param>
+    /// <returns></returns>
+    public static StringBuilder TrimStart(this StringBuilder sb, char c)
+    {
+        if (sb.Length == 0)
+            return sb;
+        while (c.Equals(sb[0]))
+        {
+            sb.Remove(0, 1);
+        }
+
+        return sb;
+    }
+
+    /// <summary>
+    /// 去除<seealso cref="StringBuilder"/>开头的指定字符数组.
+    /// </summary>
+    /// <param name="sb">StringBuilder.</param>
+    /// <param name="cs">要去掉的字符数组.</param>
+    /// <returns></returns>
+    public static StringBuilder TrimStart(this StringBuilder sb, char[] cs)
+    {
+        return sb.TrimStart(new string(cs));
+    }
+
+    /// <summary>
+    /// 去除<see cref="StringBuilder"/>开头的指定的<seealso cref="string"/>.
+    /// </summary>
+    /// <param name="sb">StringBuilder.</param>
+    /// <param name="str">要去掉的<seealso cref="string"/>.</param>
+    /// <returns></returns>
+    public static StringBuilder TrimStart(this StringBuilder sb, string str)
+    {
+        if (string.IsNullOrEmpty(str)
+            || sb.Length == 0
+            || str.Length > sb.Length)
+            return sb;
+        while (sb.SubString(0, str.Length).Equals(str))
+        {
+            sb.Remove(0, str.Length);
+            if (str.Length > sb.Length)
+            {
+                break;
+            }
+        }
+
+        return sb;
+    }
+
+    /// <summary>
+    /// 去除StringBuilder结尾的空格.
+    /// </summary>
+    /// <param name="sb">StringBuilder.</param>
+    /// <returns>返回修改后的StringBuilder，主要用于链式操作.</returns>
+    public static StringBuilder TrimEnd(this StringBuilder sb)
+    {
+        return sb.TrimEnd(' ');
+    }
+
+    /// <summary>
+    /// 去除<see cref="StringBuilder"/>结尾指定字符.
+    /// </summary>
+    /// <param name="sb">StringBuilder.</param>
+    /// <param name="c">要去掉的字符.</param>
+    /// <returns></returns>
+    public static StringBuilder TrimEnd(this StringBuilder sb, char c)
+    {
+        if (sb.Length == 0)
+            return sb;
+        while (c.Equals(sb[sb.Length - 1]))
+        {
+            sb.Remove(sb.Length - 1, 1);
+        }
+
+        return sb;
+    }
+
+    /// <summary>
+    /// 去除<see cref="StringBuilder"/>结尾指定字符数组.
+    /// </summary>
+    /// <param name="sb">StringBuilder.</param>
+    /// <param name="chars">要去除的字符数组.</param>
+    /// <returns></returns>
+    public static StringBuilder TrimEnd(this StringBuilder sb, char[] chars)
+    {
+        return sb.TrimEnd(new string(chars));
+    }
+
+    /// <summary>
+    /// 去除<see cref="StringBuilder"/>结尾指定字符串.
+    /// </summary>
+    /// <param name="sb">StringBuilder.</param>
+    /// <param name="str">要去除的字符串.</param>
+    /// <returns></returns>
+    public static StringBuilder TrimEnd(this StringBuilder sb, string str)
+    {
+        if (string.IsNullOrEmpty(str)
+            || sb.Length == 0
+            || str.Length > sb.Length)
+            return sb;
+        while (sb.SubString(sb.Length - str.Length, str.Length).Equals(str))
+        {
+            sb.Remove(sb.Length - str.Length, str.Length);
+            if (sb.Length < str.Length)
+            {
+                break;
+            }
+        }
+
+        return sb;
+    }
+
+    /// <summary>
+    /// 去除StringBuilder两端的空格.
+    /// </summary>
+    /// <param name="sb">StringBuilder.</param>
+    /// <returns>返回修改后的StringBuilder，主要用于链式操作.</returns>
+    public static StringBuilder Trim(this StringBuilder sb)
+    {
+        if (sb.Length == 0)
+            return sb;
+        return sb.TrimEnd().TrimStart();
+    }
+
+    /// <summary>
+    /// 返回<see cref="StringBuilder"/>从起始位置指定长度的字符串.
+    /// </summary>
+    /// <param name="sb">StringBuilder.</param>
+    /// <param name="start">起始位置.</param>
+    /// <param name="length">长度.</param>
+    /// <returns>字符串.</returns>
+    /// <exception cref="OverflowException">超出字符串索引长度异常.</exception>
+    public static string SubString(this StringBuilder sb, int start, int length)
+    {
+        if (start + length > sb.Length)
+            throw new IndexOutOfRangeException("超出字符串索引长度");
+        char[] cs = new char[length];
+        for (int i = 0; i < length; i++)
+        {
+            cs[i] = sb[start + i];
+        }
+
+        return new string(cs);
+    }
+}