StartsWith() Example Syntax VB.NET ASP.NET | StartsWith() | Source Code

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

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

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

 *** 1. Download Source Code *** 
VB.NET Syntax StringManipulation StartsWith 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. StartsWith Syntax *** 


Purpose:
Returns a Boolean value that indicates if the string starts with the specified string.


Syntax:
stringtoexamine.StartsWith(stringMatch)

Parameters Description
stringtoexamine Required – string input that you want to
examine to see if it starts with stringMatch
stringMatch Required – string to compare to start of
stringtoexamine.

Result Data Type Description
boolean Returns a Boolean value that indicates if the string
starts with the specified string.


 *** 3. StartsWith – Quick Example *** 
Dim strStartsWithExample As String = “This is a test string”
TextBox1.Text = strStartsWithExample.StartsWith(“This”) ‘Returns True

 *** 4. StartsWith – Full Example *** 

StartsWith Example Output Screenshot


VB.NET Syntax StringManipulation StartsWith screenshot


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

Imports System
Imports System.IO
Imports System.Data
 
' This example is from http://idealprogrammer.com
' It shows how you can use StartsWith syntax in VB.NET ASP.NET
'****************************************************************************************
' Purpose: Returns a Boolean value that indicates if the string starts with the specified string. 
'
' Syntax: 	stringtoexamine.StartsWith(stringMatch)
'
' Parameter1: stringtoexamine - Required - string input that you want to 
' examine to see if it starts with stringMatch
'
' Parameter2: stringMatch - Required - string to compare to start of
' stringtoexamine. 
'
' Result: boolean -  Returns a Boolean value that indicates if the string 
' starts with the specified string.
'
' Quick Example:     Dim strStartsWithExample As String = "This is a test string"
' TextBox1.Text = strStartsWithExample.StartsWith("This") 'Returns True
'
'****************************************************************************************
 
 
Partial Class _StartsWith
    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: stringtoexamine.StartsWith(string)"
 
        Dim strStartsWithExample As String = "This is a test string"
 
        TextBox1.Text = strStartsWithExample.StartsWith("This") 'Returns True
 
 
 
    End Sub
End Class

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

< %@ Page Language="VB" AutoEventWireup="false" CodeFile="StartsWith.aspx.vb" Inherits="_StartsWith" %>
 
< !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 StartsWith
  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 StartsWith 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 StartsWith
  5. Click on Visual Basic in step 1 at the top of this page to copy code into code-behind StartsWith.aspx.vb
  6. Click on XML in step 2 above to copy code into web form StartsWith.aspx
  7. Right-click on StartsWith.aspx in solution explorer and select view in browser

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