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StringDictionary Class in C#?
The StringDictionay class implements a hash table with the key and the value strongly typed to be strings rather than objects.
Following are the properties of the StringDictionary class −
| Sr.No | Property & Description |
|---|---|
| 1 | Count Gets the number of key/value pairs in the StringDictionary. |
| 2 | IsSynchronized Gets a value indicating whether access to the StringDictionary is synchronized (thread safe). |
| 3 | tem[String] Gets or sets the value associated with the specified key. |
| 4 | Keys Gets a collection of keys in the StringDictionary.. |
| 5 | SyncRoot Gets an object that can be used to synchronize access to the StringDictionary. |
| 6 | Values Gets a collection of values in the StringDictionary. |
Following are some of the methods of the StringDictionary class −
| Sr.No | Methods & Description |
|---|---|
| 1 | Add(String, String) Adds an entry with the specified key and value into the StringDictionary. |
| 2 | Clear() Removes all entries from the StringDictionary. |
| 3 | ContainsKey(String) Determines if the StringDictionary contains a specific |
| 4 | ContainsValue(String) Determines if the StringDictionary contains a specific value. |
| 5 | CopyTo(Array, Int32) Copies the string dictionary values to a onedimensional Array instance at the specified index. |
| 6 | Equals(Object) Determines whether the specified object is equal to the current object.(Inherited from Object) |
Example
Let us now see some examples −
To check if two StringDictionary objects are equal or not, the code is as follows −
using System;
using System.Collections.Specialized;
public class Demo {
public static void Main() {
StringDictionary strDict1 = new StringDictionary();
strDict1.Add("A", "John");
strDict1.Add("B", "Andy");
strDict1.Add("C", "Tim");
strDict1.Add("D", "Ryan");
strDict1.Add("E", "Kevin");
strDict1.Add("F", "Katie");
strDict1.Add("G", "Brad");
StringDictionary strDict2 = new StringDictionary();
strDict2.Add("A", "John");
strDict2.Add("B", "Andy");
strDict2.Add("C", "Tim");
strDict2.Add("D", "Ryan");
strDict2.Add("E", "Kevin");
strDict2.Add("F", "Katie");
strDict2.Add("G", "Brad");
StringDictionary strDict3 = new StringDictionary();
strDict3 = strDict2;
Console.WriteLine("Is Dictionary2 equal to Dictionary3? = "+strDict2.Equals(strDict3));
Console.WriteLine("Is Dictionary1 equal to Dictionary3? = "+strDict1.Equals(strDict3));
}
}Output
This will produce the following output −
Is Dictionary2 equal to Dictionary3? = True Is Dictionary1 equal to Dictionary3? = False
Example
To check if StringDictionary is synchronized, the code is as follows −
using System;
using System.Collections;
using System.Collections.Specialized;
public class Demo {
public static void Main() {
StringDictionary strDict1 = new StringDictionary();
strDict1.Add("A", "John");
strDict1.Add("B", "Andy");
strDict1.Add("C", "Tim");
strDict1.Add("D", "Ryan");
strDict1.Add("E", "Kevin");
strDict1.Add("F", "Katie");
strDict1.Add("G", "Brad");
Console.WriteLine("StringDictionary1 elements...");
foreach(DictionaryEntry de in strDict1) {
Console.WriteLine(de.Key + " " + de.Value);
}
StringDictionary strDict2 = new StringDictionary();
strDict2.Add("1", "A");
strDict2.Add("2", "B");
strDict2.Add("3", "C");
strDict2.Add("4", "D");
strDict2.Add("5", "E");
Console.WriteLine("
StringDictionary2 key-value pairs...");
IEnumerator demoEnum = strDict2.GetEnumerator();
DictionaryEntry d;
while (demoEnum.MoveNext()) {
d = (DictionaryEntry)demoEnum.Current;
Console.WriteLine("Key = " + d.Key + ", Value = " + d.Value);
}
Console.WriteLine("Is the StringDictionary2 synchronized? = "+strDict2.IsSynchronized);
}
}Output
This will produce the following output −
StringDictionary1 elements... a John b Andy c Tim d Ryan e Kevin f Katie g Brad StringDictionary2 key-value pairs... Key = 1, Value = A Key = 2, Value = B Key = 3, Value = C Key = 4, Value = D Key = 5, Value = E Is the StringDictionary2 synchronized? = False
Updated on: 16-Dec-2019
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