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77 lines
2.4 KiB
77 lines
2.4 KiB
using System;
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using System.Collections.Generic;
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using System.Text;
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namespace Apewer.Internals
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{
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internal class TextHelper
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{
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/// <summary>获取文本的长度。</summary>
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public static int Len(string argOrigin)
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{
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return string.IsNullOrEmpty(argOrigin) ? 0 : argOrigin.Length;
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}
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/// <summary>将文本转换为小写。</summary>
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public static string LCase(string argOrigin)
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{
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return string.IsNullOrEmpty(argOrigin) ? "" : argOrigin.ToLower();
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}
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/// <summary>将文本转换为大写。</summary>
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public static string UCase(string argOrigin)
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{
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return string.IsNullOrEmpty(argOrigin) ? "" : argOrigin.ToLower();
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}
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/// <summary>获取文本中间的部分,起始位置从 0 开始。</summary>
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public static string Mid(string argParent, int argStart, int argLength)
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{
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return Middle(argParent, argStart, argLength);
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}
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/// <summary>获取文本的位置。</summary>
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public static int InStr(string argParent, string argSub)
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{
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if (string.IsNullOrEmpty(argParent)) return -1;
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if (string.IsNullOrEmpty(argSub)) return -1;
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return argParent.IndexOf(argSub);
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}
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/// <summary>获取文本中间的部分,起始位置从 0 开始。</summary>
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public static string Middle(string argParent, int argStart, int argLength)
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{
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if (string.IsNullOrEmpty(argParent)) return "";
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var vstart = argStart;
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if (vstart < 0) vstart = 0;
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if (vstart >= argParent.Length) return "";
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var vlength = argLength;
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if (vlength <= 0) return "";
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if ((vlength + vstart) > argParent.Length)
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{
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vlength = argParent.Length - vstart;
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}
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return argParent.Substring(vstart, vlength);
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}
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/// <summary>获取文本左边的部分。</summary>
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public static string Left(string argParent, int argLength)
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{
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return Middle(argParent, 0, argLength);
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}
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/// <summary>获取文本右边的部分。</summary>
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public static string Right(string argParent, int argLength)
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{
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if (string.IsNullOrEmpty(argParent)) return "";
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return Middle(argParent, argParent.Length - argLength, argLength);
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}
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}
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}
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