Replace Example Syntax VB.NET ASP.NET | Replace | Source Code
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Replace Example Syntax VB.NET ASP.NET | Replace | Source Code
Summary: – Illustrates using Replace with Source Code Syntax Example in VB.NET ASP.NET.
*** 2. Replace Syntax ***
Purpose:
Returns a string with all occurrences of the old string in the string
replaced by the new string.
Syntax:
Replace(string, oldstring, newstring)
Parameters |
Description |
string |
Required – string – that you use as the source
for having all occurrences of oldstring replaced with newstring
|
oldstring |
Required – string that you want to search
for so you can replace all occurrences of it.
|
newstring |
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.
|
*** 3. Replace – Quick Example ***
|
Dim strField As String = “This is my string”
Dim strOldField As String = “my”
Dim strNewField As String = “your”
TextBox1.Text = Replace(strField, strOldField, strNewField) ‘Returns This is your string
|
*** 4. Replace – Full Example ***
Replace Example Output Screenshot
Step 1: Click on Visual Basic to Cut-n-paste code into Replace.aspx.vb
Imports System
Imports System.IO
Imports System.Data
' This example is from http://idealprogrammer.com
' It shows how you can use Replace syntax in VB.NET ASP.NET
'****************************************************************************************
' Purpose: Returns a string with all occurrences of the old string in the string
' replaced by the new string.
'
' Syntax: Replace(string, oldstring, newstring)
'
' Parameter1: string - Required - string - that you use as the source
' for having all occurrences of oldstring replaced with newstring
'
' Parameter2: oldstring - Required - string that you want to search
' for so you can replace all occurrences of it.
'
' Parameter3: newstring - 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: Dim strField As String = "This is my string"
' Dim strOldField As String = "my"
' Dim strNewField As String = "your"
' TextBox1.Text = Replace(strField, strOldField, strNewField) 'Returns This is your string
'
'****************************************************************************************
Partial Class _Replace
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: Replace(strField, strOldField, strNewField)"
Dim strField As String = "This is my string"
Dim strOldField As String = "my"
Dim strNewField As String = "your"
' Replace rest of string starting with word "test"
TextBox1.Text = Microsoft.VisualBasic.Replace(strField, strOldField, strNewField) 'Returns This is your string
End Sub
End Class |
Imports System
Imports System.IO
Imports System.Data
' This example is from http://idealprogrammer.com
' It shows how you can use Replace syntax in VB.NET ASP.NET
'****************************************************************************************
' Purpose: Returns a string with all occurrences of the old string in the string
' replaced by the new string.
'
' Syntax: Replace(string, oldstring, newstring)
'
' Parameter1: string - Required - string - that you use as the source
' for having all occurrences of oldstring replaced with newstring
'
' Parameter2: oldstring - Required - string that you want to search
' for so you can replace all occurrences of it.
'
' Parameter3: newstring - 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: Dim strField As String = "This is my string"
' Dim strOldField As String = "my"
' Dim strNewField As String = "your"
' TextBox1.Text = Replace(strField, strOldField, strNewField) 'Returns This is your string
'
'****************************************************************************************
Partial Class _Replace
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: Replace(strField, strOldField, strNewField)"
Dim strField As String = "This is my string"
Dim strOldField As String = "my"
Dim strNewField As String = "your"
' Replace rest of string starting with word "test"
TextBox1.Text = Microsoft.VisualBasic.Replace(strField, strOldField, strNewField) 'Returns This is your string
End Sub
End Class
Step 2: Click on XML to Cut-n-paste code into Replace.aspx
< %@ Page Language="VB" AutoEventWireup="false" CodeFile="Replace.aspx.vb" Inherits="_Replace" %>
< !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> |
< %@ Page Language="VB" AutoEventWireup="false" CodeFile="Replace.aspx.vb" Inherits="_Replace" %>
< !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:
- Install Visual Web Developer 2010
- Install SQL Server Express
- Download Northwind and Pubs Databases
- Attach Northwind Database to Databases in Sql Express
- 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:
- Use Visual Web Developer 2010
- 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.
- Add New folder named “StringManipulation”
- Right-click project name in solution explorer;
- add new folder;
- name of folder could be: StringManipulation
- Add Web Form Named Replace 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 Replace
- Click on Visual Basic in step 1 at the top of this page to copy code into code-behind Replace.aspx.vb
- Click on XML in step 2 above to copy code into web form Replace.aspx
- Right-click on Replace.aspx in solution explorer and select view in browser
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