This article has been excerpted from book "The Complete Visual C# Programmer's Guide" from the Authors of C# Corner.
A string in C# is simply a set of 16-bit bytes arranged in sequential memory locations. In other words, a string is simply an array of Unicode characters. C# includes a variety of standard functions to recognize this data organization as a string and emulate the actions provided by operators on true string types in other languages. C# prevents functions from writing outside the bounds of the string's memory area. Listing 20.18 is a Console application that shows some basic manipulation of strings. The program prompts the user for a string, a character to be found, and a character to replace the found characters. The program illustrates simple string initialization, assignment, concatenation and indexing.
Listing 20.18: Replacing characters in a string
// a string is an array of characters
class TheReplacer
{
static string s1, s2;
static char c2, c3;
public static void Main()
{
try
{
System.Console.Write("Please enter a string:");
s1 = System.Console.ReadLine();
System.Console.Write("Please enter a character to be found:");
string temp = System.Console.ReadLine();
c2 = temp[0];
System.Console.Write("Please enter a character to replace the found chars:");
temp = System.Console.ReadLine();
c3 = temp[0];
}
finally
{
}
try
{
for (int i = 0; i < s1.Length; i++)
{
if (c2 == s1[i])
{
s2 += c3;
}
else
{
s2 += s1[i];
}
}
}
finally
{
System.Console.WriteLine("\nNew string:" + s2);
System.Console.ReadLine();
}
}
}
The program in Listing 20.18, has this output:
Conclusion
Hope this article would have helped you in understanding Strings in C#. See other articles on the website on .NET and C#.
| The Complete Visual C# Programmer's Guide covers most of the major components that make up C# and the .net environment. The book is geared toward the intermediate programmer, but contains enough material to satisfy the advanced developer. |