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

Posted by on Thursday, May 12, 2011 · Leave a Comment 

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

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


View Other VB.NET ASP.NET Source Code Examples


Purpose:
Converts any valid date and time into date data type

Syntax:
CDate(expression)

Parameters Description
expression any valid representation of date and time

Result Data Type Description
date returns date

Quick Example
Dim date1 As Date = CDate(“September 12, 2011”)
TextBox1.Text = date1 Returns 9/12/2011 12:00:00 AM

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

Imports System
Imports System.IO
Imports System.Data
 
 '****************************************************************************************
' Purpose: Converts any valid date and time into date data type
'
' Syntax: 	CDate(expression)
'
' Parameter1: expression - any valid representation of date and time
'
' Result: date - returns date
'
' Quick Example:   Dim date1 As Date = CDate("September 12, 2011")
'        TextBox1.Text = date1 ' Returns 9/12/2011 12:00:00 AM
'
'
'****************************************************************************************
' This example is from http://idealprogrammer.com
' It shows how you can use CDate syntax in VB.NET ASP.NET
 
 
Partial Class _CDate
    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: 	CDate(expression) "
 
        Dim date1 As Date = CDate("September 12, 2011")
 
        TextBox1.Text = date1 ' Returns 9/12/2011 12:00:00 AM
 
        Label2.Text = "Example #2: 	CDate(expression) "
 
        Dim date2 As Date = CDate("3:08:40 PM")
 
        TextBox2.Text = date2 ' Returns 1/1/0001 3:08:40 PM
 
        Label3.Text = "Example #3: 	CDate(expression)"
 
        Dim date3 As Date = CDate("September 12, 2011 3:08:40 PM")
 
        TextBox3.Text = date3 ' Returns September 12, 2011 3:08:40 PM
 
 
    End Sub
End Class

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

< %@ Page Language="VB" AutoEventWireup="false" CodeFile="CDate.aspx.vb" Inherits="_CDate" %>
 
< !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 Functions CDate
  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 “Functions”
    • Right-click project name in solution explorer;
    • add new folder;
    • name of folder could be: Functions
  4. Add New subfolder named “ConversionFunctions”
    • Right-click Functions folder in solution explorer;
    • add new folder;
    • name of folder could be: ConversionFunctions
  5. Add New subfolder named “TypeConversionFunctions”
    • Right-click ConversionFunctions folder in solution explorer;
    • add new folder;
    • name of folder could be: TypeConversionFunctions
  6. Add Web Form Named CDate to TypeConversionFunctions folder
    • Right-click TypeConversionFunctions folder;
    • add new item;
    • Select Web Form
    • Check place code behind in separate file
    • Web Form name could be CDate
  7. Click on Visual Basic in step 1 at the top of this page to copy code into code-behind CDate.aspx.vb
  8. Click on XML in step 2 above to copy code into web form CDate.aspx
  9. Right-click on CDate.aspx in solution explorer and select view in browser

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