Information Technology Consultant: May 2011

The SQL Server Express application is still not functioning. Having problems with installation. BUT the ASP.Net/C# goal is progressing nicely. I just finished a chapter where I had to create a shopping cart. Four pages (2 ASP.Net and 2 C# pages), a database, two classes, and multiple images were provided from the author's website. I wrote and debugged the CheckOut.aspx (ASP.Net), CheckOut.aspx.cs (C#), and Customer.cs (Customer Class). I also set up validation and went a step further to provide proper email validation by searching for code on the internet:

ValidationExpression="^[\w-]+@[\w-]+\.(com|net|org|edu|mil)$"

I am using Murach's ASP.Net 3.5 with C# 2008 book. I really enjoy using it. I was struggling with it for awhile but as a result of just finishing a class on C++, C# is a bit similar to C++ and also similar to classic asp, using this book finally clicked with me since the author said that you need to be familiar with C# before starting the book. Leave it to me to do things backwards. : )

I think my next project will involve making a login page or using SQL in a project if I can get away without using the SQL Server I am trying to install. So I will skip around a bit in the book. I will just have to figure it out with the Internet and the two new C# books I bought from Amazon. If stuck, I can always go to Dream In Code for help.

Here are some screen shots of the project: (Click to enlarge)

Here is what the Visual Studio 2008 dashboard looks like: (Click to enlarge)

Here is the code for "CheckOut.aspx":

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="CheckOut.aspx.cs" Inherits="CheckOut" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<title>Check Out</title>

</head>

<body>

<div>

<asp:Label ID="Label1" runat="server"

Text="Please enter the following information:"></asp:Label>

<br />

<asp:Label ID="lblFirstName" runat="server" Text="First Name:" Width="110px"

style="text-align: right"></asp:Label>

 <asp:TextBox ID="txtFirstName" runat="server" Width="110px"></asp:TextBox>

<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server"

ControlToValidate="txtFirstName" Display="Dynamic"

ErrorMessage="First Name is a required field.">

</asp:RequiredFieldValidator>

<br />

<asp:Label ID="lblLastName" runat="server" Text="Last Name:" Width="110px"

style="text-align: right"></asp:Label>

 <asp:TextBox ID="txtLastName" runat="server"

Width="110px"></asp:TextBox>

<asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server"

ControlToValidate="txtLastName" Display="Dynamic"

ErrorMessage="Last Name is a required field."></asp:RequiredFieldValidator>

<br />

<asp:Label ID="lblEmail" runat="server" Text="Email:" style="text-align: right"

Width="110px"></asp:Label>

 <asp:TextBox ID="txtEmail" runat="server"

Width="110px"></asp:TextBox>

 <asp:RequiredFieldValidator ID="RequiredFieldValidator3" runat="server"

ControlToValidate="txtEmail" Display="Dynamic"

ErrorMessage="Email is a required field."></asp:RequiredFieldValidator>

 <asp:RegularExpressionValidator ID="ValidEmailRegExp" runat="server"

ControlToValidate="txtEmail" Display="Dynamic"

ValidationExpression="^[\w-]+@[\w-]+\.(com|net|org|edu|mil)$"

ErrorMessage="Please enter a valid email address"></asp:RegularExpressionValidator>

 <br />

<asp:Button ID="btnContinue" runat="server" Text="Continue Shopping"

Width="166px" onclick="btnContinue_Click" />

 <asp:Button ID="btnCancel" runat="server" Text="Cancel" Width="166px"

onclick="btnCancel_Click" />

<br />

</div>

</form>

</body>

</html>

Here is the code for "CheckOut.aspx.cs": (It looks very similar to C++)

using System;

using System.Collections;

using System.Configuration;

using System.Data;

using System.Linq;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.HtmlControls;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Xml.Linq;

public partial class CheckOut : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

}

protected void btnCancel_Click(object sender, EventArgs e)

{

Response.Redirect("Order.aspx");

txtFirstName.Text = "";

txtLastName.Text = "";

txtEmail.Text = "";

}

protected void btnContinue_Click(object sender, EventArgs e)

{

Response.Redirect("Order.aspx");

}

Backward String

Write a function that accepts a C-string as an argument and displays its contents backwards. For instance, if the string argument is “Gravity” the function should display “ytivarG”. Demonstrate the function in a program that asks the user to input a string and then passes it to the function.

Here is the output: (Click to enlarge)

Here is the code:

// Kim Pestana C++, Chapt. 11, Backward String

// Backward String

// Write a function that accepts a C-string as an argument and

// displays its contents backwards. For instance, if the string argument is “Gravity”

// the function should display “ytivarG”. Demonstrate the function in a program

// that asks the user to input a string and then passes it to the function.

#include <iostream>

#include <iomanip>

#include <fstream>

#include <string>

#include <cstring>

// Not sure if I need all libraries but it can't hurt. :)

using namespace std;

// C-String handling function

void Backward (char *);

int main()

{

// define array for letters in a word entered

char word[41];

// ask user for input

cout << "This program will display the letters of a word entered in backwards order"

"follwed by a period." << endl;

cout << "Please enter a word not over 40 letters:" << endl;

// display word entered backwards

cin >> word;

cout << "The entered word displayed in reverse is: " << word << endl;

Backward(word);

cout << endl;

system("Pause");

return 0;

}

void Backward (char *sentencePtr)

{

char *p = sentencePtr;

while ( *p != '\0' )

++p;

while ( p != sentencePtr )

cout.put ( *--p );

}

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Tuesday, May 10, 2011

ASP.Net 3.5 with C#/ SQL Server Express - My Summer Project

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C++ Backward String Program

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