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

Posted by on Sunday, March 6, 2011 · Leave a Comment 

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

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

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


Purpose:
Returns a string or object consisting of the specified
character repeated the specified number of times.


Syntax:
StrDup(Int32,Char)
StrDup(Int32,Object)
StrDup(Int32,String)

Parameters Description
Int32 Required – number of times to dup the first
character of the char, object, or string
Char, Object, String Required – Char, Object, or string
that you want the first character dupped of.

Result Data Type Description
string or object Returns a string or object consisting of the specified
character repeated the specified number of times.


 *** 3. StrDup – Quick Example *** 
TextBox1.Text = StrDup(5, “a”) ‘Returns aaaaa

 *** 4. StrDup – Full Example *** 

StrDup Example Output Screenshot


VB.NET Syntax StringManipulation StrDup screenshot


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

Imports System
Imports System.IO
Imports System.Data
 
' This example is from http://idealprogrammer.com
' It shows how you can use StrDup syntax in VB.NET ASP.NET
 
'****************************************************************************************
' Purpose: Returns a string or object consisting of the specified 
' character repeated the specified number of times.
'
' Syntax: 	StrDup(Int32,Char)
' StrDup(Int32,Object)
' StrDup(Int32,String)
'
' Parameter1: Int32 - Required - number of times to dup the first 
' character of the char, object, or string
'
' Parameter2: Char, Object, String - Required - Char, Object, or string
' that you want the first character dupped of.
'
' Result: string or object -  Returns a string or object consisting of the specified 
' character repeated the specified number of times.
'
' Quick Example:     TextBox1.Text = StrDup(5, "a") 'Returns aaaaa
'
'****************************************************************************************
 
'****************************************************************************************
' Overload #1: 	StrDup(Int32,Char) Returns a string or object consisting of the specified 
' character repeated the specified number of times.
' Overload #2: 	StrDup(Int32,Object) Returns a string or object consisting of the specified 
' character repeated the specified number of times.
' Overload #3: 	StrDup(Int32,String) Returns a string or object consisting of the specified 
' character repeated the specified number of times.
'****************************************************************************************
 
Partial Class _StrDup
    Inherits System.Web.UI.Page
 
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
 
        Label1.Text = "Overload #1: 	StrDup(Int32,Char) "
 
        TextBox1.Text = Microsoft.VisualBasic.StrDup(5, "a") 'Returns aaaaa
 
        Dim aObject As New Object
        aObject = "Object"
        Label2.Text = "Overload #2: 	StrDup(Int32,aObject) "
        TextBox2.Text = Microsoft.VisualBasic.StrDup(5, aObject) 'Returns OOOOO
 
        Dim aString As String = "String!"
        Label3.Text = "Overload #3: 	StrDup(Int32,aString) "
        TextBox3.Text = Microsoft.VisualBasic.StrDup(5, aString) 'Returns SSSSS
 
 
    End Sub
End Class

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

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

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