VB.NET ASP.NET Option Compare Source Code | Option Compare Example Syntax

Posted by on Saturday, March 5, 2011 · Leave a Comment 

OptionCompare Example Syntax VB.NET ASP.NET | OptionCompare | Source Code

Summary: – Illustrates using with in VB.NET ASP.NET.

 *** 1. Download Source Code *** 
VB.NET Syntax StringManipulation OptionCompare download Download Source Code for All VB ASP.NET Examples in One Project – source code for hundreds of VB.NET ASP.NET examples neatly organized in a single project. Check back often to download the latest version of the project with even more code samples.

 *** 2. OptionCompare Syntax *** 


Purpose:
Declares the default comparison method to use when comparing string data.


Syntax:
Option Compare { Binary | Text }

Parameters Description
Binary/Text Binary – Optional – compares based on binary representation – case sensitive
Text – Optional – compares based on text representation – case insensitive

Result Data Type Description
comparisons case sensitive if binary is specified; case insensitive if
text is specified. NOTE: Option statement must appear in a file before
any other source code statements


 *** 3. OptionCompare – Quick Example *** 

TextBox1.Text = “A” = “a” ‘ Returns True when Option Compare Text is specified at top of page

 *** 4. OptionCompare – Full Example *** 

OptionCompare Example Output Screenshot


VB.NET Syntax StringManipulation OptionCompare screenshot


Step 1: Click on Visual Basic to Cut-n-paste code into OptionCompare.aspx.vb

Option Compare Text
Imports System
Imports System.IO
Imports System.Data
 
 
 
 
' This example is from http://idealprogrammer.com
' It shows how you can use OptionCompare syntax in VB.NET ASP.NET
'****************************************************************************************
' Purpose: Declares the default comparison method to use when comparing string data.
'
' Syntax: 	Option Compare { Binary | Text }
'
' Parameter1: Binary/Text - Binary - Optional - compares based on binary representation - case sensitive
' Text - Optional - compares based on text representation - case insensitive
'
' Result: comparisons - case sensitive if binary is specified; case insensitive if 
' text is specified. NOTE: Option statement must appear in a file before 
' any other source code statements
'
' Quick Example: 
' TextBox1.Text = "A" = "a" ' Returns True when Option Compare Text is specified at top of page
'
'****************************************************************************************
 
Partial Class _OptionCompare
    Inherits System.Web.UI.Page
 
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
 
        Label1.Text = "Example #1: 	Option Compare Text "
 
        Dim strOptionCompareExample As String = "This is a test string"
 
        TextBox1.Text = "A" = "a" ' Returns True
 
 
    End Sub
End Class

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

< %@ Page Language="VB" AutoEventWireup="false" CodeFile="OptionCompare.aspx.vb" Inherits="_OptionCompare" %>
 
< !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 />
          <h1><asp:label ID="Label2" runat="server" Text="Label"></asp:label> </h1>
         <asp:textbox ID="TextBox2" runat="server"></asp:textbox><br />
          <h1><asp:label ID="Label3" runat="server" Text="Label"></asp:label> </h1>
         <asp:textbox ID="TextBox3" 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:

VB.NET ASP.NET Syntax StringManipulation OptionCompare
  1. Use Visual Web Developer 2010
  2. Create new web site;
    • Click File/New Web Site
    • Select ASP.NET Website Template
    • Select Visual Basic for Language
    • name of Web Site could be VBNET_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 OptionCompare 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 OptionCompare
  5. Click on Visual Basic in step 1 at the top of this page to copy code into code-behind OptionCompare.aspx.vb
  6. Click on XML in step 2 above to copy code into web form OptionCompare.aspx
  7. Right-click on OptionCompare.aspx in solution explorer and select view in browser

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