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51 lines
1.3 KiB
51 lines
1.3 KiB
#if NET40 || NET461
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using System;
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namespace Apewer.Internals.QrCode
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{
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internal static class String40Methods
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{
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/// <summary>
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/// The IsNullOrWhiteSpace method from Framework4.0
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/// </summary>
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/// <returns>
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/// <c>true</c> if the <paramref name="value"/> is null or white space; otherwise, <c>false</c>.
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/// </returns>
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public static bool IsNullOrWhiteSpace(String value)
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{
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if (value == null) return true;
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for (int i = 0; i < value.Length; i++)
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{
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if (!Char.IsWhiteSpace(value[i])) return false;
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}
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return true;
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}
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public static string ReverseString(string str)
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{
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char[] chars = str.ToCharArray();
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char[] result = new char[chars.Length];
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for (int i = 0, j = str.Length - 1; i < str.Length; i++, j--)
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{
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result[i] = chars[j];
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}
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return new string(result);
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}
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public static bool IsAllDigit(string str)
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{
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foreach (var c in str)
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{
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if (!char.IsDigit(c))
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{
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return false;
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}
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}
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return true;
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}
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}
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}
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#endif
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