C-Sharp Replace Example – Code Sample Syntax

Posted by on Saturday, June 4, 2011 · Leave a Comment 

C-Sharp Replace Example – Code Sample Syntax

Abstract: – Illustrates using .

 *** 1. Download Source Code *** 
C-Sharp Syntax StringManipulation Replace download Download Source Code for All C-Sharp Console Examples in One Project – source code for hundreds of C-Sharp console examples neatly organized in a single project.

 *** 2. Replace Syntax *** 


Purpose:
Returns a string with all occurrences of the old string in the string
replaced by the new string.


Syntax:
strField.Replace(strOldField, strNewField)

Parameters Description
strField Required – string – that you use as the source
for having all occurrences of oldstring replaced with newstring
strOldField Required – string that you want to search
for so you can replace all occurrences of it.
strNewField Required – string that you want to replace
the oldstring with.

Result Data Type Description
string Returns a string with all occurrences of the old string in the string
replaced by the new string.


Quick Example
string strField = “This is my string”;
string strOldField = “my”;
string strNewField = “your”;
Console.WriteLine(strField.Replace(strOldField, strNewField)); Returns This is your string

 *** 4. Replace – Full Example *** 

Replace Example Output Screenshot


C-Sharp Syntax StringManipulation Replace screenshot


Step 1: Click C# to Cut-n-paste code into clsReplace.cs

using System;
public class clsReplace
{
 
    public void Main()
    {
 
        //****************************************************************************************
        // Purpose:  Returns a string with all occurrences of the old string in the string
        // replaced by the new string.
        //
        // Syntax: 	strField.Replace(strOldField, strNewField)
        //
        // Parameter1: strField - Required - string - that you use as the source
        // for having all occurrences of oldstring replaced with newstring
        //
        // Parameter2: strOldField - Required - string that you want to search
        // for so you can replace all occurrences of it.
        //
        // Parameter3: strNewField - Required - string that you want to replace
        // the oldstring with.
        //
        // Result: string -  Returns a string with all occurrences of the old string in the string
        // replaced by the new string.
        //
        // Quick Example:      string strField = "This is my string";
        // string strOldField = "my";
        // string strNewField = "your";
        // Console.WriteLine(strField.Replace(strOldField, strNewField)); //Returns This is your string
        //
        //****************************************************************************************
 
        //****************************************************************************************
        // Example #1: Replace(string, oldstring, newstring)
        // Returns a string with all occurrences of the old string in the string
        // replaced by the new string.
        //****************************************************************************************
 
        Console.WriteLine("Example #1: Replace(strField, strOldField, strNewField)");
 
        string strField = "This is my string";
        string strOldField = "my";
        string strNewField = "your";
 
        Console.WriteLine(strField.Replace(strOldField, strNewField)); //Returns This is your string
 
        //write blank line to make output easier to read
        Console.WriteLine();
 
 
 
        //Prevent console from closing before you press enter
        Console.ReadLine();
 
    }
 
 
}

Step 2: Click C# 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)
        {
 
            clsReplace myReplace = new clsReplace();
            myReplace.Main();
 
        }
    }
}

Prerequistes:

  1. Install C-Sharp (Express or Standard Edition)
  2. Install SQL Server Express
  3. Download Northwind and pubs Database
  4. Attach Northwind Database to Databases in Sql Express
  5. 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 a library of syntax examples by using same project over and over and just commenting out what you do not want to execute in Program.cs

Instructions:
C-Sharp Syntax StringManipulation Replace

  1. Use C-Sharp 2010 Express or Standard Edition
  2. Create new project;
    • Click File/New Project
    • Select Console Application Template
    • Select C-Sharp for Language
    • name of project could be CSharp_Syntax.
  3. Add New folder named “StringManipulation”
    • Right-click project name in solution explorer;
    • add new folder;
    • name of folder could be: StringManipulation
  4. Add Class Named clsReplace to StringManipulation folder
    • Right-click StringManipulation folder;
    • add new item;
    • Select class
    • Class name could be clsReplace
  5. Click on C# in code in step 1 above to copy code into clsReplace.cs
  6. Click on C# in code in step 2 above to copy code into Program.cs
  7. Click green arrow or press F5 to run program

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