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

Posted by on Saturday, May 14, 2011 · Leave a Comment 

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

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


View Other VB.NET ASP.NET Source Code Examples


Purpose:
converts a tangent to radians of an angle. The function
takes a double data type number and returns a double value
that repesents the radians of the angle for that tangent.
(you can convert the radians to degrees by multiplying
them by Math.PI/180)

Syntax:
Atan(double)

Parameters Description
double The expression represents a tangent that
is to be converted into radians of an angle.
Any valid System.Double data type number between -1 and +1
if number < -1 or > 1, NaN is returned – NaN stands for Not a Number

Result Data Type Description
double represents the radians of the angle of the
tangent that was specified as the input parameter.

Quick Example
Atan(90) ‘ Returns 1.55968567289729

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

 
Imports System
Imports System.IO
Imports System.Data
Imports System.Math
 
'********************************************************************************
' Purpose: converts a tangent to radians of an angle. The function
' takes a double data type number and returns a double value
' that repesents the radians of the angle for that tangent.
' (you can convert the radians to degrees by multiplying
' them by Math.PI/180)
'
' Syntax: 	Atan(double)
'
' Parameter1: double - The expression represents a tangent that
' is to be converted into radians of an angle.
' Any valid System.Double data type number between -1 and +1
' if number < -1 or > 1, NaN is returned - NaN stands for Not a Number
'
' Result: double - represents the radians of the angle of the
' tangent that was specified as the input parameter.
'
' Quick Example: Atan(90) ' Returns 1.55968567289729
'
'********************************************************************************
' This example is from http://idealprogrammer.com
 
 
 
Partial Class _Atan
    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: 	Atan(double)"
 
 
        TextBox1.Text = Atan(90) ' Returns 1.55968567289729
 
 
        Label2.Text = "Example #2: 	Atan(double)"
 
 
        TextBox2.Text = Atan(-3.4) ' Returns -1.28474488507758
 
 
        Label3.Text = "Example #3: 	Atan(double)"
 
        Dim Integer3 As Integer = Atan(-0)
 
 
        TextBox3.Text = Atan(-0) ' Returns 0
 
 
    End Sub
End Class

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

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

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