C# StringBuilder Source Code Example
StringBuilder Source Code Example
Purpose: – Illustrates using StringBuilder and StringBuilder Methods in C-Sharp.
Prerequistes:
- Install C# (Express or Standard Edition)
- Install SQL Server Express
- Download Northwind and Pubs Databases
- Attach Northwind Database to Databases in Sql Express
- Attach pubs Database to Databases in Sql Express
Notes:
- Console Application is used to simplify things, but Windows Forms or Web Forms could also be used
- You can build your own library of syntax examples by using same project over and over and just adding new classes to it.
Instructions:
- Use C# 2008 (express or standard)
- Create new project;
- Click File/New Project
- Select Console Application Template
- Select C-Sharp for Language
- name of project could be CSharp_Syntax.
- Add New folder named “LanguageBasics”
- Right-click project name in solution explorer;
- add new folder;
- name of folder could be: LanguageBasics
- Add Class named clsStringBuilder to LanguageBasics folder
- Right-click LanguageBasics folder;
- add new item;
- Select Class
- Class name could be clsStringBuilder
- Click on copy code in code below to copy code into class clsStringBuilder.cs
- Click on copy code in second set of code below to copy code into Program.cs
- Click on green arrow in toolbar in VS or press F5 to run program.
Step 1: Click on Copy Code to Cut-n-paste code into clsStringBuilder.cs
using System.Text; using System; public class clsStringBuilder { public void Main() { //**************************************************************************************** // Example #1: StringBuilder Append(string) - most common way stringbuilder is used // Adds the specified string or string representation of the specified value to the end // of the string //**************************************************************************************** Console.WriteLine("Example #1: Simple StringBuilder Append(string) "); StringBuilder sb = new StringBuilder(); sb.Append("First Line"); sb.Append("\n"); sb.Append("Second Line"); Console.WriteLine(sb.ToString()); //write blank line to make output easier to read Console.WriteLine(); //Append(string, startIndex, count) //**************************************************************************************** // Example #2: StringBuilder Append(string, startIndex, count) // Adds a substring of the specified string, starting with the specified // position and having the specified length, to the end of the string //**************************************************************************************** Console.WriteLine("Example #2: StringBuilder Append(string, startIndex, count)"); StringBuilder sb2 = new StringBuilder(); sb2.Append("The dog and cat "); sb2.Append("love to fight and play", 0, 13); //take love to fight and add to end of prev string Console.WriteLine(sb2.ToString()); //write blank line to make output easier to read Console.WriteLine(); //Insert(index, string[, count]) //**************************************************************************************** // Example #3: StringBuilder Insert(index, string[, count]) // Inserts the specified string or a string representation of the specified // value at the specified position in the string the specified number of // times. If the count is ommitted, a single copy of the string is inserted. //**************************************************************************************** Console.WriteLine("Example #3: Insert(index, string[, count])"); StringBuilder sb3 = new StringBuilder(); sb3.Append("This is the initial sentence"); sb3.Insert(20, "and modified ", 2); Console.WriteLine(sb3.ToString()); //write blank line to make output easier to read Console.WriteLine(); //Remove(startIndex,count) //**************************************************************************************** // Example #4: StringBuilder Remove(startIndex,count) // Removes the specified number of characters from the string starting at // the specified position //**************************************************************************************** Console.WriteLine("Example #4: StringBuilder Remove(startIndex,count)"); StringBuilder sb4 = new StringBuilder(); sb4.Append("This is the initial sentence"); sb4.Remove(20, 8); Console.WriteLine(sb4.ToString()); //write blank line to make output easier to read Console.WriteLine(); //Replace(oldString,newString [,startIndex][,count]) //**************************************************************************************** // Example #5: StringBuilder Replace(oldString,newString [,startIndex][,count]) // Replaces all occurences of the old string with the new string starting // at the specified position and continuing for the specified number of characters. // If you omit startIndex, it starts at beginning // If you omit count, it does entire string //**************************************************************************************** Console.WriteLine("Example #5: StringBuilder Replace(oldString,newString [,startIndex][,count])"); StringBuilder sb5 = new StringBuilder(); sb5.Append("This is the initial sentence"); sb5.Replace("initial", "new"); Console.WriteLine(sb5.ToString()); //write blank line to make output easier to read Console.WriteLine(); //Prevent console from closing before you press enter Console.ReadLine(); } } |
Step 2: Click on Copy Code to Cut-n-paste code into Program.cs
using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace CSharp_Syntax { class Program { static void Main(string[] args) { //LanguageBasics clsStringBuilder myStringBuilder = new clsStringBuilder(); myStringBuilder.Main(); } } } |
Step 3: Click on green arrow in toolbar in VS or press F5 to run program.