C-Sharp Substring Example | ASP.NET C# Substring Syntax | Source Code

Posted by on Saturday, April 2, 2011 · Leave a Comment 

C-Sharp Substring Example | ASP.NET C# Substring Syntax | Source Code

Purpose: – Here is a that illustrates the .

View Other C-Sharp ASP.NET Source Code Examples »

Step 1: Click on C# to Cut-n-paste code into Substring.aspx.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
 
// This example is from http://idealprogrammer.com
// It shows how you can use Substring syntax in C-Sharp ASP.NET
 
//****************************************************************************************
// Example #1: Substring(startIndex[, length])
// Returns the string that starts at the specified position and has the specified
// length. If the length is not specified, all of the characters to the end are returned.
//****************************************************************************************
 
public partial class StringManipulation_Substring : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        Label1.Text = "Example #1: Substring(startIndex[, length])   ";
 
        string strSubstringExample = "This is a test string";
        int intIndexSubstring = 0;
 
        // First find position of word test
        intIndexSubstring = strSubstringExample.IndexOf("test");
 
        // Get everything starting at "test" to end of string
        TextBox1.Text = strSubstringExample.Substring(intIndexSubstring);
 
    }
}
//----------------------------------------------------------------------------------------
//	Copyright © 2003 - 2011 Tangible Software Solutions Inc.
//	This class can be used by anyone provided that the copyright notice remains intact.
//
//	This class simulates the behavior of the classic VB 'Substring' function.
//----------------------------------------------------------------------------------------
public static class SimulateSubstring
{
    public static string Substring(string expression)
    {
        if (expression == null || expression.Length == 0)
            return string.Empty;
 
        string reversedString = string.Empty;
        for (int charIndex = expression.Length - 1; charIndex >= 0; charIndex--)
        {
            reversedString += expression[charIndex];
        }
        return reversedString;
    }
}

Step 2: Click on XML to Cut-n-paste code into Substring.aspx

< %@ Page Language="C#" AutoEventWireup="true" CodeFile="Substring.aspx.cs" Inherits="StringManipulation_Substring" %>
 
< !DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
     <h1><asp:label ID="Label1" runat="server" Text="Label"></asp:label> </h1>
         <asp:textbox ID="TextBox1" runat="server"></asp:textbox><br />
    </div>
    </form>
</body>
</html>

Prerequistes:

  1. Install Visual Web Developer 2010
  2. Install SQL Server Express
  3. Download Northwind and Pubs Databases
  4. Attach Northwind Database to Databases in Sql Express
  5. Attach pubs Database to Databases in Sql Express

Notes:

  • You can build your own library of syntax examples by using same web site over and over and just add new web forms to it.

Instructions:

CS Syntax String Manipulation Substring
CS Syntax String Manipulation Substring
  1. Use Visual Web Developer 2010
  2. Create new web site;
    • Click File/New Web Site
    • Select ASP.NET Website Template
    • Select C-Sharp for Language
    • name of Web Site could be CSharp_ASPNET_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 Web Form Named Substring.aspx to StringManipulation folder
    • Right-click StringManipulation folder;
    • add new item;
    • Select Web Form
    • Check place code behind in separate file
    • Web Form name could be Substring.aspx
  5. Click on C-Sharp in step 1 at the top of this page to copy code into web form Substring.aspx
  6. Click on XML in step 2 above to copy code into code-behind Substring.aspx.cs
  7. Right-click on Substring.aspx in solution explorer and select view in browser

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