Wrox Programmer Forums

Need to download code?

View our list of code downloads.

Go Back   Wrox Programmer Forums > C# and C > C# 2008 > BOOK: Beginning C# 3.0 : An Introduction to Object Oriented Programming ISBN: 978-0-470-26129-3
Password Reminder
Register
Register | FAQ | Members List | Calendar | Search | Today's Posts | Mark Forums Read
BOOK: Beginning C# 3.0 : An Introduction to Object Oriented Programming ISBN: 978-0-470-26129-3
This is the forum to discuss the Wrox book Beginning C# 3.0 : An Introduction to Object Oriented Programming by Jack Purdum; ISBN: 9780470261293
Welcome to the p2p.wrox.com Forums.

You are currently viewing the BOOK: Beginning C# 3.0 : An Introduction to Object Oriented Programming ISBN: 978-0-470-26129-3 section of the Wrox Programmer to Programmer discussions. This is a community of tens of thousands of software programmers and website developers including Wrox book authors and readers. As a guest, you can read any forum posting. By joining today you can post your own programming questions, respond to other developers’ questions, and eliminate the ads that are displayed to guests. Registration is fast, simple and absolutely free .
DRM-free e-books 300x50
 
 
Thread Tools Search this Thread Display Modes
  #1 (permalink)  
Old March 9th, 2009, 10:07 PM
Authorized User
 
Join Date: Apr 2007
Location: Meridian, ID, USA.
Posts: 12
Thanks: 1
Thanked 0 Times in 0 Posts
Default Form Data Will Not Display When I Click On Display Button

Hello,

I have followed the books instructions, and the Errata, and still cannot get any DATA to display from the "Mailing Label Program". I fill in all of the fields and click the "Display Button" The button changes and says "Mail Label" but no DATA is displayed in the textbox from the fields. What am I doing wrong???? Here is my code: Thanks, in advance

using System;
using System.Windows.Forms;

public class frmMain : Form
{
private Label label1;
private Label label2;
private Label label4;
private Label label5;
private TextBox txtName;
private TextBox txtAddress;
private TextBox txtCity;
private TextBox txtState;
private TextBox txtZip;
private Button btnDisplayOutput;
private Button btnExit;
private TextBox txtResult;
private Label label3;
#region Windows code
private void InitializeComponent()
{
this.label1 = new System.Windows.Forms.Label();
this.label2 = new System.Windows.Forms.Label();
this.label3 = new System.Windows.Forms.Label();
this.label4 = new System.Windows.Forms.Label();
this.label5 = new System.Windows.Forms.Label();
this.txtName = new System.Windows.Forms.TextBox();
this.txtAddress = new System.Windows.Forms.TextBox();
this.txtCity = new System.Windows.Forms.TextBox();
this.txtState = new System.Windows.Forms.TextBox();
this.txtZip = new System.Windows.Forms.TextBox();
this.btnDisplayOutput = new System.Windows.Forms.Button();
this.btnExit = new System.Windows.Forms.Button();
this.txtResult = new System.Windows.Forms.TextBox();
this.SuspendLayout();
//
// label1
//
this.label1.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
this.label1.Location = new System.Drawing.Point(63, 41);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(75, 20);
this.label1.TabIndex = 0;
this.label1.Text = "Name:";
//
// label2
//
this.label2.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
this.label2.Location = new System.Drawing.Point(63, 83);
this.label2.Name = "label2";
this.label2.Size = new System.Drawing.Size(75, 20);
this.label2.TabIndex = 1;
this.label2.Text = "Address:";
//
// label3
//
this.label3.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
this.label3.Location = new System.Drawing.Point(60, 130);
this.label3.Name = "label3";
this.label3.Size = new System.Drawing.Size(75, 20);
this.label3.TabIndex = 2;
this.label3.Text = "City";
//
// label4
//
this.label4.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
this.label4.Location = new System.Drawing.Point(258, 130);
this.label4.Name = "label4";
this.label4.Size = new System.Drawing.Size(40, 20);
this.label4.TabIndex = 3;
this.label4.Text = "State";
//
// label5
//
this.label5.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
this.label5.Location = new System.Drawing.Point(376, 130);
this.label5.Name = "label5";
this.label5.Size = new System.Drawing.Size(40, 20);
this.label5.TabIndex = 4;
this.label5.Text = "Zip";
//
// txtName
//
this.txtName.Location = new System.Drawing.Point(181, 40);
this.txtName.Name = "txtName";
this.txtName.Size = new System.Drawing.Size(411, 20);
this.txtName.TabIndex = 5;
//
// txtAddress
//
this.txtAddress.Location = new System.Drawing.Point(181, 82);
this.txtAddress.Name = "txtAddress";
this.txtAddress.Size = new System.Drawing.Size(411, 20);
this.txtAddress.TabIndex = 6;
//
// txtCity
//
this.txtCity.Location = new System.Drawing.Point(141, 130);
this.txtCity.Name = "txtCity";
this.txtCity.Size = new System.Drawing.Size(111, 20);
this.txtCity.TabIndex = 7;
//
// txtState
//
this.txtState.Location = new System.Drawing.Point(304, 130);
this.txtState.Name = "txtState";
this.txtState.Size = new System.Drawing.Size(54, 20);
this.txtState.TabIndex = 8;
//
// txtZip
//
this.txtZip.Location = new System.Drawing.Point(434, 129);
this.txtZip.Name = "txtZip";
this.txtZip.Size = new System.Drawing.Size(158, 20);
this.txtZip.TabIndex = 9;
//
// btnDisplayOutput
//
this.btnDisplayOutput.Location = new System.Drawing.Point(60, 217);
this.btnDisplayOutput.Name = "btnDisplayOutput";
this.btnDisplayOutput.Size = new System.Drawing.Size(75, 23);
this.btnDisplayOutput.TabIndex = 10;
this.btnDisplayOutput.Text = "&Display";
this.btnDisplayOutput.UseVisualStyleBackColor = true;
this.btnDisplayOutput.Click += new System.EventHandler(this.btnDisplayOutput_Click);
//
// btnExit
//
this.btnExit.Location = new System.Drawing.Point(517, 217);
this.btnExit.Name = "btnExit";
this.btnExit.Size = new System.Drawing.Size(75, 23);
this.btnExit.TabIndex = 11;
this.btnExit.Text = "E&xit";
this.btnExit.UseVisualStyleBackColor = true;
//
// txtResult
//
this.txtResult.Location = new System.Drawing.Point(60, 262);
this.txtResult.Multiline = true;
this.txtResult.Name = "txtResult";
this.txtResult.ReadOnly = true;
this.txtResult.Size = new System.Drawing.Size(532, 194);
this.txtResult.TabIndex = 12;
//
// frmMain
//
this.ClientSize = new System.Drawing.Size(635, 468);
this.Controls.Add(this.txtResult);
this.Controls.Add(this.btnExit);
this.Controls.Add(this.btnDisplayOutput);
this.Controls.Add(this.txtZip);
this.Controls.Add(this.txtState);
this.Controls.Add(this.txtCity);
this.Controls.Add(this.txtAddress);
this.Controls.Add(this.txtName);
this.Controls.Add(this.label5);
this.Controls.Add(this.label4);
this.Controls.Add(this.label3);
this.Controls.Add(this.label2);
this.Controls.Add(this.label1);
this.Name = "frmMain";
this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScree n;
this.Text = "Mailing Label Program";
this.Load += new System.EventHandler(this.frmMain_Load);
this.ResumeLayout(false);
this.PerformLayout();

}
#endregion

public frmMain()
{
InitializeComponent();
}

public static void Main()
{
frmMain main = new frmMain();
Application.Run(main);
}

private void frmMain_Load(object sender, EventArgs e)
{

}

private void btnDisplayOutput_Click(object sender, EventArgs e)
{
String buffer;

buffer = "Mailing Label:" + Environment.NewLine +
Environment.NewLine;
buffer = buffer + " Name: " + txtName.Text +
Environment.NewLine;
buffer = buffer + "Address: " + txtAddress.Text +
Environment.NewLine;
buffer = buffer + " City: " + txtCity.Text +
" State: " + txtState.Text +
" Zip: " + txtZip.Text;
btnDisplayOutput.Text = buffer;

}
}
__________________
SUPER DAVE
  #2 (permalink)  
Old March 9th, 2009, 11:03 PM
Wrox Author
Points: 13,255, Level: 49
Points: 13,255, Level: 49 Points: 13,255, Level: 49 Points: 13,255, Level: 49
Activity: 0%
Activity: 0% Activity: 0% Activity: 0%
 
Join Date: Oct 2005
Location: Ohio, USA
Posts: 4,104
Thanks: 1
Thanked 64 Times in 64 Posts
Send a message via AIM to dparsons
Default

This book is the hot topic tonight! Anyway, I am looking at the manuscript right now on Books 24x7 and the last line of the DisplayOutput click event handler is not:

btnDisplayOutput.Text = buffer;

but rather:

txtDisplayOutput.Text = buffer;

In the case of your code you would actually want to use txtResult.Text = buffer;

The Books 24 x 7 manuscript refers to the textbox as txtDisplayOutput throughout, however, if the manuscript that you have is calling it txtResult in one place and txtDisplayOutput in another could you please submit the issue to the errata for the book?

Let me know if you have any other questions.

hth
-Doug
__________________
===============================================
Doug Parsons
Wrox online library: Wrox Books 24 x 7
Did someone here help you? Click on their post!
"Easy is the path to wisdom for those not blinded by themselves."
===============================================
The Following User Says Thank You to dparsons For This Useful Post:
sprdave (March 9th, 2009)
  #3 (permalink)  
Old March 9th, 2009, 11:04 PM
Authorized User
 
Join Date: Apr 2007
Location: Meridian, ID, USA.
Posts: 12
Thanks: 1
Thanked 0 Times in 0 Posts
Default Displays Now

Here is the fix if anyone else had the same problem:

I named the bottom "textbox" txtDisplayOutput in the properties.
Re-ran the example and now I have data displayed. I guess I did not understand what the Errata was trying to explain about this issue.
__________________
SUPER DAVE
  #4 (permalink)  
Old March 9th, 2009, 11:07 PM
Authorized User
 
Join Date: Apr 2007
Location: Meridian, ID, USA.
Posts: 12
Thanks: 1
Thanked 0 Times in 0 Posts
Default

Doug says:
The Books 24 x 7 manuscript refers to the textbox as txtDisplayOutput throughout, however, if the manuscript that you have is calling it txtResult in one place and txtDisplayOutput in another could you please submit the issue to the errata for the book?

Doug - Will do!! I LOVE YOUR BOOK!!!!! I am finally understanding OOP!! Thanks for the fast reply!
__________________
SUPER DAVE
  #5 (permalink)  
Old March 9th, 2009, 11:28 PM
Wrox Author
Points: 13,255, Level: 49
Points: 13,255, Level: 49 Points: 13,255, Level: 49 Points: 13,255, Level: 49
Activity: 0%
Activity: 0% Activity: 0% Activity: 0%
 
Join Date: Oct 2005
Location: Ohio, USA
Posts: 4,104
Thanks: 1
Thanked 64 Times in 64 Posts
Send a message via AIM to dparsons
Default

Well thank you, I only wish it were MY book! ;] In any event, if you need any more help feel free to post.

-Doug
__________________
===============================================
Doug Parsons
Wrox online library: Wrox Books 24 x 7
Did someone here help you? Click on their post!
"Easy is the path to wisdom for those not blinded by themselves."
===============================================
  #6 (permalink)  
Old March 10th, 2009, 12:56 AM
Registered User
 
Join Date: Mar 2009
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
Default resolved

I resolved it. Well, I went to a different computer and entered the excerise carefully. Its now working.... thanks everyone for your assistance.
  #7 (permalink)  
Old March 12th, 2009, 08:49 PM
Friend of Wrox
Points: 1,166, Level: 13
Points: 1,166, Level: 13 Points: 1,166, Level: 13 Points: 1,166, Level: 13
Activity: 0%
Activity: 0% Activity: 0% Activity: 0%
 
Join Date: Sep 2008
Location: Indianapolis, IN, USA.
Posts: 234
Thanks: 0
Thanked 32 Times in 30 Posts
Default

Thanks, Doug, for helping this guy out. My computer has been dead for almost two weeks now and I'm writing this from Panera Bread! I'll try to check in more often when I can.

Dr. Purdum
__________________
Jack Purdum, Ph.D.
Author: Beginning C# 3.0: Introduction to Object Oriented Programming (and 14 other programming texts)
  #8 (permalink)  
Old March 12th, 2009, 11:28 PM
Wrox Author
Points: 13,255, Level: 49
Points: 13,255, Level: 49 Points: 13,255, Level: 49 Points: 13,255, Level: 49
Activity: 0%
Activity: 0% Activity: 0% Activity: 0%
 
Join Date: Oct 2005
Location: Ohio, USA
Posts: 4,104
Thanks: 1
Thanked 64 Times in 64 Posts
Send a message via AIM to dparsons
Default

No problem Jack. =]
__________________
===============================================
Doug Parsons
Wrox online library: Wrox Books 24 x 7
Did someone here help you? Click on their post!
"Easy is the path to wisdom for those not blinded by themselves."
===============================================
  #9 (permalink)  
Old February 12th, 2011, 03:53 PM
Authorized User
 
Join Date: Feb 2011
Posts: 21
Thanks: 2
Thanked 0 Times in 0 Posts
Default Same problem as above

Good evening, im also experiencing similar problems. I have, to the best of my knowledge managed to correct the code according to the Errata posts yet neither of my buttons (referring to the code, not myself) are working. Ive already copied the original posts code and scanned through it + couldnt see any differences other than i have made the alterations stated in the Errata.

If someone would be willing to have a look at this and point out my stupid mistake id appreciate it as ive already spent a good few hours starting from scratch a couple time.

Code:
using System;
using System.Windows.Forms;

public class frmMain : Form
{
    private Label label1;
    private Label label2;
    private Label label4;
    private Label label5;
    private TextBox txtCity;
    private TextBox txtName;
    private TextBox txtAddress;
    private TextBox txtState;
    private TextBox txtZip;
    private Button btnDisplayOutput;
    private Button btnExit;
    private TextBox txtDisplayOutput;
    private Label label3;
    #region Windows code
    private void InitializeComponent()
    {
        this.label1 = new System.Windows.Forms.Label();
        this.label2 = new System.Windows.Forms.Label();
        this.label3 = new System.Windows.Forms.Label();
        this.label4 = new System.Windows.Forms.Label();
        this.label5 = new System.Windows.Forms.Label();
        this.txtCity = new System.Windows.Forms.TextBox();
        this.txtName = new System.Windows.Forms.TextBox();
        this.txtAddress = new System.Windows.Forms.TextBox();
        this.txtState = new System.Windows.Forms.TextBox();
        this.txtZip = new System.Windows.Forms.TextBox();
        this.btnDisplayOutput = new System.Windows.Forms.Button();
        this.btnExit = new System.Windows.Forms.Button();
        this.txtDisplayOutput = new System.Windows.Forms.TextBox();
        this.SuspendLayout();
        // 
        // label1
        // 
        this.label1.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
        this.label1.Location = new System.Drawing.Point(0, 0);
        this.label1.Name = "label1";
        this.label1.Size = new System.Drawing.Size(75, 20);
        this.label1.TabIndex = 0;
        this.label1.Text = "Name:";
        // 
        // label2
        // 
        this.label2.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
        this.label2.Location = new System.Drawing.Point(-3, 20);
        this.label2.Name = "label2";
        this.label2.Size = new System.Drawing.Size(75, 20);
        this.label2.TabIndex = 1;
        this.label2.Text = "Address:";
        // 
        // label3
        // 
        this.label3.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
        this.label3.Location = new System.Drawing.Point(-3, 40);
        this.label3.Name = "label3";
        this.label3.Size = new System.Drawing.Size(75, 20);
        this.label3.TabIndex = 2;
        this.label3.Text = "City:";
        // 
        // label4
        // 
        this.label4.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
        this.label4.Location = new System.Drawing.Point(-3, 60);
        this.label4.Name = "label4";
        this.label4.Size = new System.Drawing.Size(40, 20);
        this.label4.TabIndex = 3;
        this.label4.Text = "State:";
        // 
        // label5
        // 
        this.label5.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
        this.label5.Location = new System.Drawing.Point(-3, 80);
        this.label5.Name = "label5";
        this.label5.Size = new System.Drawing.Size(40, 20);
        this.label5.TabIndex = 4;
        this.label5.Text = "Zip:";
        // 
        // txtCity
        // 
        this.txtCity.Location = new System.Drawing.Point(81, 40);
        this.txtCity.Name = "txtCity";
        this.txtCity.Size = new System.Drawing.Size(100, 20);
        this.txtCity.TabIndex = 7;
        // 
        // txtName
        // 
        this.txtName.Location = new System.Drawing.Point(81, 0);
        this.txtName.Name = "txtName";
        this.txtName.Size = new System.Drawing.Size(100, 20);
        this.txtName.TabIndex = 5;
        // 
        // txtAddress
        // 
        this.txtAddress.Location = new System.Drawing.Point(81, 20);
        this.txtAddress.Name = "txtAddress";
        this.txtAddress.Size = new System.Drawing.Size(100, 20);
        this.txtAddress.TabIndex = 6;
        // 
        // txtState
        // 
        this.txtState.Location = new System.Drawing.Point(46, 61);
        this.txtState.Name = "txtState";
        this.txtState.Size = new System.Drawing.Size(100, 20);
        this.txtState.TabIndex = 8;
        // 
        // txtZip
        // 
        this.txtZip.Location = new System.Drawing.Point(46, 79);
        this.txtZip.Name = "txtZip";
        this.txtZip.Size = new System.Drawing.Size(100, 20);
        this.txtZip.TabIndex = 9;
        // 
        // btnDisplayOutput
        // 
        this.btnDisplayOutput.Location = new System.Drawing.Point(0, 114);
        this.btnDisplayOutput.Name = "btnDisplayOutput";
        this.btnDisplayOutput.Size = new System.Drawing.Size(75, 23);
        this.btnDisplayOutput.TabIndex = 11;
        this.btnDisplayOutput.Text = "&Display";
        this.btnDisplayOutput.UseVisualStyleBackColor = true;
        // 
        // btnExit
        // 
        this.btnExit.Location = new System.Drawing.Point(120, 114);
        this.btnExit.Name = "btnExit";
        this.btnExit.Size = new System.Drawing.Size(75, 23);
        this.btnExit.TabIndex = 12;
        this.btnExit.Text = "E&xit";
        this.btnExit.UseVisualStyleBackColor = true;
        // 
        // txtDisplayOutput
        // 
        this.txtDisplayOutput.Location = new System.Drawing.Point(28, 174);
        this.txtDisplayOutput.Multiline = true;
        this.txtDisplayOutput.Name = "txtDisplayOutput";
        this.txtDisplayOutput.ReadOnly = true;
        this.txtDisplayOutput.Size = new System.Drawing.Size(202, 71);
        this.txtDisplayOutput.TabIndex = 13;
        // 
        // frmMain
        // 
        this.ClientSize = new System.Drawing.Size(292, 266);
        this.Controls.Add(this.txtDisplayOutput);
        this.Controls.Add(this.btnExit);
        this.Controls.Add(this.btnDisplayOutput);
        this.Controls.Add(this.txtZip);
        this.Controls.Add(this.txtState);
        this.Controls.Add(this.txtCity);
        this.Controls.Add(this.txtAddress);
        this.Controls.Add(this.txtName);
        this.Controls.Add(this.label5);
        this.Controls.Add(this.label4);
        this.Controls.Add(this.label3);
        this.Controls.Add(this.label2);
        this.Controls.Add(this.label1);
        this.Name = "frmMain";
        this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
        this.Text = "Mailing Label Program";
        this.ResumeLayout(false);
        this.PerformLayout();

    }
    #endregion

    public frmMain()
    {
        InitializeComponent();
    }
    public static void Main()
    {
        frmMain main = new frmMain();
        Application.Run(main);
    }

    private void btnDisplayOutput_Click(object sender, EventArgs e)
    {
        String buffer;

buffer = "Mailing Label:" + Environment.NewLine + Environment.NewLine;
buffer = buffer + "   Name: " + txtName.Text + Environment.NewLine;
buffer = buffer + "Address: " + txtAddress.Text + Environment.NewLine;
        buffer = buffer + " City: " + txtCity.Text + 
                " State: " + txtState.Text +
                " Zip: " + txtZip.Text;
        txtDisplayOutput.Text = buffer;
    }
    private void btnExit_Click(object sender, EventArgs e)
    {
        Close();
    }

    
}
  #10 (permalink)  
Old February 12th, 2011, 05:34 PM
Friend of Wrox
Points: 1,166, Level: 13
Points: 1,166, Level: 13 Points: 1,166, Level: 13 Points: 1,166, Level: 13
Activity: 0%
Activity: 0% Activity: 0% Activity: 0%
 
Join Date: Sep 2008
Location: Indianapolis, IN, USA.
Posts: 234
Thanks: 0
Thanked 32 Times in 30 Posts
Default

Hi scolty:

While I can't be positive, I put your code into VS and it did not behave as advertised. I put a breakpoint in the button Click event...and NEVER reached the breakpoint. This suggests that you wrote the Click event code before placing the button on the form.

The easiest way to check for such things is to display the form in the Design mode, and double click the button in question. If you see something like:

btnDisplayOutput_Click_1()

(notice the underscore 1 at the end), that tells me that the button control was not tied to the code. When you look at your source code, you will likely see code for two Click events: 1) The one you wrote, and 2) the one the compiler wants to execute when the user clicks the button. Alas, the compiler will ignore your code and execute the click event that doesn't have any code!

The fix is easy. Copy all of the code between the opening and closing braces for the Click event to the clipboard (e.g., highlight the code, then Ctrl-X). Now, delete the button click event so there's no code tied to the button in the source code file. Now switch back to the Design mode. Double-click on the button. This causes the button Click event fragment to be written back into the souce file. Now, place your cursor between the braces and press Ctrl-V to insert your code back into the button Click event. Your program should run fine now.
__________________
Jack Purdum, Ph.D.
Author: Beginning C# 3.0: Introduction to Object Oriented Programming (and 14 other programming texts)
The Following User Says Thank You to DrPurdum For This Useful Post:
scolty (February 12th, 2011)
 


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
I want to display record number in data entry form markw707 Access 5 August 28th, 2014 12:08 PM
Display Table Data in a Form using VBA hewstone999 Access VBA 1 February 28th, 2008 08:26 AM
refresh and display new data after clicking button hosefo81 PHP How-To 0 January 1st, 2004 02:07 AM



All times are GMT -4. The time now is 05:16 AM.


Powered by vBulletin®
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
© 2013 John Wiley & Sons, Inc.