ConvertToBoolean Example Syntax C-Sharp ASP.NET | C# ConvertToBoolean | Source Code

Posted by on Tuesday, May 17, 2011 · Leave a Comment 

ConvertToBoolean Example Syntax C-Sharp ASP.NET | C# ConvertToBoolean | Source Code

Summary: – Illustrates using with in C-Sharp ASP.NET.


View Other C-Sharp ASP.NET Type Conversion Function Examples


Purpose:
Converts char, string, or numeric expression to boolean data type

Syntax:
Convert.ToBoolean(expression)

Parameters Description
expression char, string, or numberic expression

Result Data Type Description
Boolean is false if input converts to 0; otherwise, it is true

Quick Example
Convert.ToBoolean(“True”) // Returns True

Step 1: Click on cs to Cut-n-paste code into ConvertToBoolean.aspx.cs

using System;
using System.IO;
using System.Data;
 
//****************************************************************************************
// Purpose: Converts char, string, or numeric expression to boolean data type
//
// Syntax: 	Convert.ToBoolean(expression)
//
// Parameter1: expression - char, string, or numberic expression
//
// Result: Boolean - is false if input converts to 0; otherwise, it is true
//
// Quick Example: Convert.ToBoolean("True") // Returns True
//
//****************************************************************************************
// This example is from http://idealprogrammer.com
// It shows how you can use CBool syntax in C-Sharp ASP.NET
 
 
partial class _ConvertToBoolean : System.Web.UI.Page
{
 
    protected void Page_Load(object sender, System.EventArgs e)
    {
 
        Label1.Text = "Example #1: 	Convert.ToBoolean(string) ";
 
        string strField = "True";
        TextBox1.Text = Convert.ToBoolean(strField).ToString(); //Returns True
 
        Label2.Text = "Example #2: 	Convert.ToBoolean(numeric expression) ";
 
        int intField = 1;
        TextBox2.Text = Convert.ToBoolean(intField).ToString(); //Returns True
 
 
 
    }
 
 
}

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

< %@ Page Language="VB" AutoEventWireup="false" CodeFile="ConvertToBoolean.aspx.cs" Inherits="_ConvertToBoolean" %>
 
< !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:

C-Sharp ASP.NET Syntax Functions ConversionFunctions ConvertToBoolean
  1. Use Visual Web Developer 2010
  2. Create new web site;
    • Click File/New Web Site
    • Select ASP.NET Website Template
    • Select C-Sharp for Language
    • name of Web Site could be CSharp_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 Functions folder in solution explorer;
    • add new folder;
    • name of folder could be: TypeConversionFunctions
  6. Add Web Form Named ConvertToBoolean 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 ConvertToBoolean
  7. Click on cs in step 1 at the top of this page to copy code into code-behind ConvertToBoolean.aspx.cs
  8. Click on XML in step 2 above to copy code into web form ConvertToBoolean.aspx
  9. Right-click on ConvertToBoolean.aspx in solution explorer and select view in browser

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