要指示指定的 Unicode 字符是否为空格，代码如下所示：示例 在线演示使用 System; public class Demo {    public static void Main() {       bool res;       char val = ' ';       Console.WriteLine("Value = "+val);       res = Char.IsWhiteSpace(val);       Console.WriteLine("Is the value whitespace? = "+res);    } }输出这将产生以下输出：Value = Is the value whitespace? = True示例让我们看另一个示例： 在线演示使用 System; public class Demo {    public static void Main() {       bool res; ... 阅读更多

StringCollection 类表示字符串的集合。以下是 StringCollection 类的属性：序号属性和描述1Count获取 OrderedDictionary 集合中包含的键/值对的数量。2IsReadOnly获取一个值，该值指示 StringCollection 是否为只读。3IsSynchronized获取一个值，该值指示对 StringCollection 的访问是否已同步（线程安全）。4Item[Int32]获取或设置指定索引处的元素。5SyncRoot获取一个对象，该对象可用于同步对 StringCollection 的访问。以下是 StringCollection 类的的方法：序号方法和描述1Add(String)将字符串添加到 StringCollection 的末尾。2AddRange(String[])将字符串数组的元素复制到 StringCollection 的末尾。3Clear()删除所有 ... 阅读更多

要在 C# 中查找 StringBuilder 的容量，代码如下所示：示例 在线演示使用 System; using System.Text; public class Demo {    public static void Main(String[] args) {       StringBuilder strBuilder1 = new StringBuilder("Tim");       StringBuilder strBuilder2 = new StringBuilder("Tom");       StringBuilder strBuilder3 = new StringBuilder();       Console.WriteLine("Capacity of StringBuilder1 = "+strBuilder1.Capacity);       Console.WriteLine("Capacity of StringBuilder2 = "+strBuilder2.Capacity);       Console.WriteLine("Capacity of StringBuilder3 = "+strBuilder3.Capacity);       strBuilder2 = strBuilder3;       Console.WriteLine("Is StringBuilder3 equal to StringBuilder2? = "+strBuilder3.Equals(strBuilder2));    } }输出这将产生以下输出：... 阅读更多

要获取数组中存在的元素总数，代码如下所示：示例 在线演示使用 System; public class Demo {    public static void Main() {       string[] products = { "Electronics", "Accessories", "Clothing", "Toys", "Clothing", "Furniture" };       Console.WriteLine("Products list...");       foreach(string s in products) {          Console.WriteLine(s);       }       Console.WriteLine("Array length = "+products.GetLength(0));       Console.WriteLine("One or more products begin with the letter 'C'? = {0}", Array.Exists(products, ele => ele.StartsWith("C")));       Console.WriteLine("One or more planets begin with 'D'? ... 阅读更多

要在 C# 中创建 StringBuilder，代码如下所示：示例 在线演示使用 System; using System.Text; public class Demo {    public static void Main(String[] args) {       StringBuilder strBuilder1 = new StringBuilder("Tim");       StringBuilder strBuilder2 = new StringBuilder("Tom");       Console.WriteLine("Is StringBuilder1 equal to StringBuilder2? = "+strBuilder1.Equals(strBuilder2));    } }输出这将产生以下输出：Is StringBuilder1 equal to StringBuilder2? = False示例让我们看另一个示例： 在线演示使用 System; using System.Text; public class Demo {    public static void Main(String[] args) {       StringBuilder strBuilder1 = new StringBuilder("John");       StringBuilder strBuilder2 = new StringBuilder("John");       ... 阅读更多

要在 C# 中创建 OrderedDictionary，代码如下所示：示例 在线演示使用 System; using System.Collections; using System.Collections.Specialized; public class Demo {    public static void Main() {       OrderedDictionary dict = new OrderedDictionary();       dict.Add("A", "Books");       dict.Add("B", "Electronics");       dict.Add("C", "Smart Wearables");       dict.Add("D", "Pet Supplies");       dict.Add("E", "Clothing");       dict.Add("F", "Footwear");       Console.WriteLine("OrderedDictionary elements...");       foreach(DictionaryEntry d in dict) {          Console.WriteLine(d.Key + " " + d.Value);       }       Console.WriteLine("Count of ... 阅读更多

OrderedDictionary 类表示键/值对的集合，这些键/值对可以通过键或索引访问。以下是 OrderedDictionary 类的属性：序号属性和描述1Count获取 OrderedDictionary 集合中包含的键/值对的数量。2IsReadOnly获取一个值，该值指示 OrderedDictionary 集合是否为只读。3Item[Int32]获取或设置指定索引处的 value。4Item[Object]获取或设置具有指定 key 的 value。5Keys获取包含 OrderedDictionary 集合中 key 的 ICollection 对象。6Values获取包含 OrderedDictionary 集合中 value 的 ICollection 对象。以下是 OrderedDictionary 类的一些方法：序号方法和描述1Add(Object, Object)添加具有指定 key 的条目 ... 阅读更多

要查找 StringBuilder 的 MaxCapacity，代码如下所示：示例 在线演示使用 System; using System.Text; public class Demo {    public static void Main(String[] args) {       StringBuilder strBuilder1 = new StringBuilder("Amy");       StringBuilder strBuilder2 = new StringBuilder("Katie");       StringBuilder strBuilder3 = new StringBuilder();       StringBuilder strBuilder4 = new StringBuilder(5);       strBuilder2 = strBuilder3;       Console.WriteLine("Is StringBuilder3 equal to StringBuilder2? = "+strBuilder3.Equals(strBuilder2));       Console.WriteLine("StringBuider1 capacity = "+strBuilder1.Capacity);       Console.WriteLine("StringBuider1 maximum capacity = "+strBuilder1.MaxCapacity);       Console.WriteLine("StringBuider2 capacity = "+strBuilder2.Capacity);   ... 阅读更多

要在 C# 中查找 StringBuilder 的长度，代码如下所示：示例 在线演示使用 System; using System.Text; public class Demo {    public static void Main(String[] args) {       StringBuilder strBuilder1 = new StringBuilder("Amy");       StringBuilder strBuilder2 = new StringBuilder("Katie");       StringBuilder strBuilder3 = new StringBuilder();       StringBuilder strBuilder4 = new StringBuilder(5);       strBuilder2 = strBuilder3;       Console.WriteLine("Is StringBuilder3 equal to StringBuilder2? = "+strBuilder3.Equals(strBuilder2));       Console.WriteLine("StringBuider1 capacity = "+strBuilder1.Capacity);       Console.WriteLine("StringBuider1 maximum capacity = "+strBuilder1.MaxCapacity);       Console.WriteLine("StringBuider1 length = "+strBuilder1.Length); ... 阅读更多

在 C# 中创建 StringDictionary 的代码如下所示 - 示例 在线演示using System; using System.Collections; using System.Collections.Specialized; public class Demo {    public static void Main() {       StringDictionary strDict = new StringDictionary();       strDict.Add("A", "John");       strDict.Add("B", "Andy");       strDict.Add("C", "Tim");       strDict.Add("D", "Ryan");       strDict.Add("E", "Kevin");       strDict.Add("F", "Katie");       strDict.Add("G", "Brad");       Console.WriteLine("StringDictionary 元素...");       foreach(DictionaryEntry de in strDict) {          Console.WriteLine(de.Key + " " + de.Value);       }    } ... 阅读更多