本文整理汇总了C#中System.String.Equals方法的典型用法代码示例。如果您正苦于以下问题：C# String.Equals方法的具体用法？C# String.Equals怎么用？C# String.Equals使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类System.String的用法示例。
在下文中一共展示了String.Equals方法的6个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: Main
//引入命名空间
using System;
class Sample
{
public static void Main()
{
// Define a string array with the following three "I" characters:
// U+0069, U+0131, and U+0049.
string[] threeIs = { "i", "ı", "I" };
// Define Type object representing StringComparison type.
Type scType = typeof(StringComparison);
// Show the current culture (for culture-sensitive string comparisons).
Console.WriteLine("The current culture is {0}.\n",
System.Globalization.CultureInfo.CurrentCulture.Name);
// Perform comparisons using each StringComparison member.
foreach (string scName in Enum.GetNames(scType))
{
StringComparison sc = (StringComparison) Enum.Parse(scType, scName);
Console.WriteLine("Comparisons using {0}:", sc);
// Compare each character in character array.
for (int ctr = 0; ctr <= 1; ctr++)
{
string instanceChar = threeIs[ctr];
for (int innerCtr = ctr + 1; innerCtr <= threeIs.GetUpperBound(0); innerCtr++)
{
string otherChar = threeIs[innerCtr];
Console.WriteLine("{0} (U+{1}) = {2} (U+{3}): {4}",
instanceChar, Convert.ToInt16(Char.Parse(instanceChar)).ToString("X4"),
otherChar, Convert.ToInt16(Char.Parse(otherChar)).ToString("X4"),
instanceChar.Equals(otherChar, sc));
}
Console.WriteLine();
}
}
}
}输出：
The current culture is en-US. Comparisons using CurrentCulture: i (U+0069) = i (U+0131): False i (U+0069) = I (U+0049): False i (U+0131) = I (U+0049): False Comparisons using CurrentCultureIgnoreCase: i (U+0069) = i (U+0131): False i (U+0069) = I (U+0049): True i (U+0131) = I (U+0049): False Comparisons using InvariantCulture: i (U+0069) = i (U+0131): False i (U+0069) = I (U+0049): False i (U+0131) = I (U+0049): False Comparisons using InvariantCultureIgnoreCase: i (U+0069) = i (U+0131): False i (U+0069) = I (U+0049): True i (U+0131) = I (U+0049): False Comparisons using Ordinal: i (U+0069) = i (U+0131): False i (U+0069) = I (U+0049): False i (U+0131) = I (U+0049): False Comparisons using OrdinalIgnoreCase: i (U+0069) = i (U+0131): False i (U+0069) = I (U+0049): True i (U+0131) = I (U+0049): False
示例2: Main
//引入命名空间
using System;
using System.Globalization;
using System.Threading;
public class Example
{
public static void Main()
{
String[] cultureNames = { "en-US", "se-SE" };
String[] strings1 = { "case", "encyclopædia",
"encyclopædia", "Archæology" };
String[] strings2 = { "Case", "encyclopaedia",
"encyclopedia" , "ARCHÆOLOGY" };
StringComparison[] comparisons = (StringComparison[]) Enum.GetValues(typeof(StringComparison));
foreach (var cultureName in cultureNames) {
Thread.CurrentThread.CurrentCulture = CultureInfo.CreateSpecificCulture(cultureName);
Console.WriteLine("Current Culture: {0}", CultureInfo.CurrentCulture.Name);
for (int ctr = 0; ctr <= strings1.GetUpperBound(0); ctr++) {
foreach (var comparison in comparisons)
Console.WriteLine(" {0} = {1} ({2}): {3}", strings1[ctr],
strings2[ctr], comparison,
strings1[ctr].Equals(strings2[ctr], comparison));
Console.WriteLine();
}
Console.WriteLine();
}
}
}输出：
Current Culture: en-US case = Case (CurrentCulture): False case = Case (CurrentCultureIgnoreCase): True case = Case (InvariantCulture): False case = Case (InvariantCultureIgnoreCase): True case = Case (Ordinal): False case = Case (OrdinalIgnoreCase): True encyclopædia = encyclopaedia (CurrentCulture): True encyclopædia = encyclopaedia (CurrentCultureIgnoreCase): True encyclopædia = encyclopaedia (InvariantCulture): True encyclopædia = encyclopaedia (InvariantCultureIgnoreCase): True encyclopædia = encyclopaedia (Ordinal): False encyclopædia = encyclopaedia (OrdinalIgnoreCase): False encyclopædia = encyclopedia (CurrentCulture): False encyclopædia = encyclopedia (CurrentCultureIgnoreCase): False encyclopædia = encyclopedia (InvariantCulture): False encyclopædia = encyclopedia (InvariantCultureIgnoreCase): False encyclopædia = encyclopedia (Ordinal): False encyclopædia = encyclopedia (OrdinalIgnoreCase): False Archæology = ARCHÆOLOGY (CurrentCulture): False Archæology = ARCHÆOLOGY (CurrentCultureIgnoreCase): True Archæology = ARCHÆOLOGY (InvariantCulture): False Archæology = ARCHÆOLOGY (InvariantCultureIgnoreCase): True Archæology = ARCHÆOLOGY (Ordinal): False Archæology = ARCHÆOLOGY (OrdinalIgnoreCase): True Current Culture: se-SE case = Case (CurrentCulture): False case = Case (CurrentCultureIgnoreCase): True case = Case (InvariantCulture): False case = Case (InvariantCultureIgnoreCase): True case = Case (Ordinal): False case = Case (OrdinalIgnoreCase): True encyclopædia = encyclopaedia (CurrentCulture): False encyclopædia = encyclopaedia (CurrentCultureIgnoreCase): False encyclopædia = encyclopaedia (InvariantCulture): True encyclopædia = encyclopaedia (InvariantCultureIgnoreCase): True encyclopædia = encyclopaedia (Ordinal): False encyclopædia = encyclopaedia (OrdinalIgnoreCase): False encyclopædia = encyclopedia (CurrentCulture): False encyclopædia = encyclopedia (CurrentCultureIgnoreCase): False encyclopædia = encyclopedia (InvariantCulture): False encyclopædia = encyclopedia (InvariantCultureIgnoreCase): False encyclopædia = encyclopedia (Ordinal): False encyclopædia = encyclopedia (OrdinalIgnoreCase): False Archæology = ARCHÆOLOGY (CurrentCulture): False Archæology = ARCHÆOLOGY (CurrentCultureIgnoreCase): True Archæology = ARCHÆOLOGY (InvariantCulture): False Archæology = ARCHÆOLOGY (InvariantCultureIgnoreCase): True Archæology = ARCHÆOLOGY (Ordinal): False Archæology = ARCHÆOLOGY (OrdinalIgnoreCase): True
示例3: Main
// Sample for String.Equals(Object)
// String.Equals(String)
// String.Equals(String, String)
using System;
using System.Text;
class Sample {
public static void Main() {
StringBuilder sb = new StringBuilder("abcd");
String str1 = "abcd";
String str2 = null;
Object o2 = null;
Console.WriteLine();
Console.WriteLine(" * The value of String str1 is '{0}'.", str1);
Console.WriteLine(" * The value of StringBuilder sb is '{0}'.", sb.ToString());
Console.WriteLine();
Console.WriteLine("1a) String.Equals(Object). Object is a StringBuilder, not a String.");
Console.WriteLine(" Is str1 equal to sb?: {0}", str1.Equals(sb));
Console.WriteLine();
Console.WriteLine("1b) String.Equals(Object). Object is a String.");
str2 = sb.ToString();
o2 = str2;
Console.WriteLine(" * The value of Object o2 is '{0}'.", o2);
Console.WriteLine(" Is str1 equal to o2?: {0}", str1.Equals(o2));
Console.WriteLine();
Console.WriteLine(" 2) String.Equals(String)");
Console.WriteLine(" * The value of String str2 is '{0}'.", str2);
Console.WriteLine(" Is str1 equal to str2?: {0}", str1.Equals(str2));
Console.WriteLine();
Console.WriteLine(" 3) String.Equals(String, String)");
Console.WriteLine(" Is str1 equal to str2?: {0}", String.Equals(str1, str2));
}
}输出：
* The value of String str1 is 'abcd'.
* The value of StringBuilder sb is 'abcd'.
1a) String.Equals(Object). Object is a StringBuilder, not a String.
Is str1 equal to sb?: False
1b) String.Equals(Object). Object is a String.
* The value of Object o2 is 'abcd'.
Is str1 equal to o2?: True
2) String.Equals(String)
* The value of String str2 is 'abcd'.
Is str1 equal to str2?: True
3) String.Equals(String, String)
Is str1 equal to str2?: True
示例4: Main
//引入命名空间
using System;
using System.Globalization;
using System.Threading;
public class Example
{
public static void Main()
{
String[] cultureNames = { "en-US", "se-SE" };
String[] strings1 = { "case", "encyclopædia",
"encyclopædia", "Archæology" };
String[] strings2 = { "Case", "encyclopaedia",
"encyclopedia" , "ARCHÆOLOGY" };
StringComparison[] comparisons = (StringComparison[]) Enum.GetValues(typeof(StringComparison));
foreach (var cultureName in cultureNames) {
Thread.CurrentThread.CurrentCulture = CultureInfo.CreateSpecificCulture(cultureName);
Console.WriteLine("Current Culture: {0}", CultureInfo.CurrentCulture.Name);
for (int ctr = 0; ctr <= strings1.GetUpperBound(0); ctr++) {
foreach (var comparison in comparisons)
Console.WriteLine(" {0} = {1} ({2}): {3}", strings1[ctr],
strings2[ctr], comparison,
String.Equals(strings1[ctr], strings2[ctr], comparison));
Console.WriteLine();
}
Console.WriteLine();
}
}
}输出：
Current Culture: en-US case = Case (CurrentCulture): False case = Case (CurrentCultureIgnoreCase): True case = Case (InvariantCulture): False case = Case (InvariantCultureIgnoreCase): True case = Case (Ordinal): False case = Case (OrdinalIgnoreCase): True encyclopædia = encyclopaedia (CurrentCulture): True encyclopædia = encyclopaedia (CurrentCultureIgnoreCase): True encyclopædia = encyclopaedia (InvariantCulture): True encyclopædia = encyclopaedia (InvariantCultureIgnoreCase): True encyclopædia = encyclopaedia (Ordinal): False encyclopædia = encyclopaedia (OrdinalIgnoreCase): False encyclopædia = encyclopedia (CurrentCulture): False encyclopædia = encyclopedia (CurrentCultureIgnoreCase): False encyclopædia = encyclopedia (InvariantCulture): False encyclopædia = encyclopedia (InvariantCultureIgnoreCase): False encyclopædia = encyclopedia (Ordinal): False encyclopædia = encyclopedia (OrdinalIgnoreCase): False Archæology = ARCHÆOLOGY (CurrentCulture): False Archæology = ARCHÆOLOGY (CurrentCultureIgnoreCase): True Archæology = ARCHÆOLOGY (InvariantCulture): False Archæology = ARCHÆOLOGY (InvariantCultureIgnoreCase): True Archæology = ARCHÆOLOGY (Ordinal): False Archæology = ARCHÆOLOGY (OrdinalIgnoreCase): True Current Culture: se-SE case = Case (CurrentCulture): False case = Case (CurrentCultureIgnoreCase): True case = Case (InvariantCulture): False case = Case (InvariantCultureIgnoreCase): True case = Case (Ordinal): False case = Case (OrdinalIgnoreCase): True encyclopædia = encyclopaedia (CurrentCulture): False encyclopædia = encyclopaedia (CurrentCultureIgnoreCase): False encyclopædia = encyclopaedia (InvariantCulture): True encyclopædia = encyclopaedia (InvariantCultureIgnoreCase): True encyclopædia = encyclopaedia (Ordinal): False encyclopædia = encyclopaedia (OrdinalIgnoreCase): False encyclopædia = encyclopedia (CurrentCulture): False encyclopædia = encyclopedia (CurrentCultureIgnoreCase): False encyclopædia = encyclopedia (InvariantCulture): False encyclopædia = encyclopedia (InvariantCultureIgnoreCase): False encyclopædia = encyclopedia (Ordinal): False encyclopædia = encyclopedia (OrdinalIgnoreCase): False Archæology = ARCHÆOLOGY (CurrentCulture): False Archæology = ARCHÆOLOGY (CurrentCultureIgnoreCase): True Archæology = ARCHÆOLOGY (InvariantCulture): False Archæology = ARCHÆOLOGY (InvariantCultureIgnoreCase): True Archæology = ARCHÆOLOGY (Ordinal): False Archæology = ARCHÆOLOGY (OrdinalIgnoreCase): True
示例5: Main
//引入命名空间
using System;
public class Example
{
public static void Main()
{
Console.OutputEncoding = System.Text.Encoding.UTF8;
string word = "File";
string[] others = { word.ToLower(), word, word.ToUpper(), "Fıle" };
foreach (string other in others)
{
if (word.Equals(other))
Console.WriteLine("{0} = {1}", word, other);
else
Console.WriteLine("{0} {1} {2}", word, '\u2260', other);
}
}
}输出：
File ≠ file File = File File ≠ FILE File ≠ Fıle
示例6: String.Equals(String aString)
//引入命名空间
using System;
class MainClass
{
public static void Main()
{
bool boolResult;
string myString = "str";
string myString2 = "str2";
boolResult = String.Equals("bbc", "bbc");
Console.WriteLine("String.Equals(\"bbc\", \"bbc\") is " + boolResult);
boolResult = myString.Equals(myString2);
Console.WriteLine("myString.Equals(myString2) is " + boolResult);
boolResult = myString == myString2;
Console.WriteLine("myString == myString2 is " + boolResult);
}
}