74 lines
2.9 KiB
C#
74 lines
2.9 KiB
C#
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// This example demonstrates the
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// System.String.Compare(String, String, StringComparison) method.
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using System;
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using System.Threading;
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class Example29
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{
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public static void Main()
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{
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string intro = "Compare three versions of the letter I using different " +
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"values of StringComparison.";
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// Define an array of strings where each element contains a version of the
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// letter I. (An array of strings is used so you can easily modify this
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// code example to test additional or different combinations of strings.)
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string[] threeIs = new string[3];
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// LATIN SMALL LETTER I (U+0069)
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threeIs[0] = "\u0069";
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// LATIN SMALL LETTER DOTLESS I (U+0131)
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threeIs[1] = "\u0131";
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// LATIN CAPITAL LETTER I (U+0049)
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threeIs[2] = "\u0049";
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string[] unicodeNames =
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{
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"LATIN SMALL LETTER I (U+0069)",
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"LATIN SMALL LETTER DOTLESS I (U+0131)",
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"LATIN CAPITAL LETTER I (U+0049)"
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};
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StringComparison[] scValues =
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{
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StringComparison.CurrentCulture,
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StringComparison.CurrentCultureIgnoreCase,
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StringComparison.InvariantCulture,
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StringComparison.InvariantCultureIgnoreCase,
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StringComparison.Ordinal,
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StringComparison.OrdinalIgnoreCase
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};
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//
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Console.Clear();
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Console.WriteLine(intro);
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// Display the current culture because the culture-specific comparisons
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// can produce different results with different cultures.
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Console.WriteLine("The current culture is {0}.\n",
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Thread.CurrentThread.CurrentCulture.Name);
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// Determine the relative sort order of three versions of the letter I.
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foreach (StringComparison sc in scValues)
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{
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Console.WriteLine("StringComparison.{0}:", sc);
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// LATIN SMALL LETTER I (U+0069) : LATIN SMALL LETTER DOTLESS I (U+0131)
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Test(0, 1, sc, threeIs, unicodeNames);
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// LATIN SMALL LETTER I (U+0069) : LATIN CAPITAL LETTER I (U+0049)
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Test(0, 2, sc, threeIs, unicodeNames);
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// LATIN SMALL LETTER DOTLESS I (U+0131) : LATIN CAPITAL LETTER I (U+0049)
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Test(1, 2, sc, threeIs, unicodeNames);
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Console.WriteLine();
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}
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}
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protected static void Test(int x, int y,
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StringComparison comparison,
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string[] testI, string[] testNames)
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{
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string resultFmt = "{0} is {1} {2}";
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string result = "equal to";
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int cmpValue = 0;
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//
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cmpValue = String.Compare(testI[x], testI[y], comparison);
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if (cmpValue < 0)
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result = "less than";
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else if (cmpValue > 0)
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result = "greater than";
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Console.WriteLine(resultFmt, testNames[x], result, testNames[y]);
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}
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}
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