1 // Student: Pat Moss
  2 // Instructor: Dave Hammer
  3 // CIS162AD C# 5832 - Worksheet #6 - Carpet Cost Calculator
  4 // 03/25/2006 Rev. 01a (includes try/catch blocks and Help)
  5 
  6 // Programming exercise #6 on page 553:
  7 // Create a Windows application for purchasing carpet.
  8 // Allow the length and width of a room to be entered.
  9 // Have a control that displays different prices of carpet.
 10 // Include, for example, prices such as $21.95 per square yard.
 11 // After the user enters their room dimensions and the price
 12 // of the carpet, display the total cost to carpet the room.
 13 // Ref: "Visual C# .NET Programming", B Doyle, 0619159979. 
 14 using System;
 15 using System.Drawing;
 16 using System.Collections;
 17 using System.ComponentModel;
 18 using System.Windows.Forms;
 19 using System.Data;
 20 
 21 namespace carpetcalculator
 22 {
 23   /// <summary>
 24   /// Summary description for CarpetCalculator form
 25   /// </summary>
 26   public class CarpetCalculator : System.Windows.Forms.Form
 27   {
 28     private System.Windows.Forms.ComboBox cboPrices;
 29     private System.Windows.Forms.TextBox txtWidth;
 30     private System.Windows.Forms.TextBox txtLength;
 31     private System.Windows.Forms.Label label1;
 32     private System.Windows.Forms.Label label2;
 33     private System.Windows.Forms.Button btnCalculate;
 34     private System.Windows.Forms.Button btnExit;
 35     private System.Windows.Forms.Label label3;
 36     private System.Windows.Forms.Label label4;
 37     private System.Windows.Forms.TextBox txtTotalCost;
 38     private System.Windows.Forms.Label label5;
 39     private System.Windows.Forms.TextBox txtSqYd;
 40     private System.Windows.Forms.Button btnClear;
 41     private System.Windows.Forms.Button btnHelp;
 42 
 43     /// <summary>
 44     /// Required designer variable
 45     /// </summary>
 46     private System.ComponentModel.Container components = null;
 47 
 48     public CarpetCalculator()
 49     {
 50       //
 51       // Required for Windows Form Designer support
 52       //
 53       InitializeComponent();
 54 
 55       //
 56       // TODO: Add any constructor code after InitializeComponent call
 57       //
 58     }
 59 
 60     /// <summary>
 61     /// Clean up any resources being used
 62     /// </summary>
 63     protected override void Dispose( bool disposing )
 64     {
 65       if( disposing )
 66       {
 67         if (components != null)
 68         {
 69           components.Dispose();
 70         }
 71       }
 72       base.Dispose( disposing );
 73     }
 74 
 75     #region Windows Form Designer generated code
 76     /// <summary>
 77     /// Required method for Designer support - do not modify
 78     /// the contents of this method with the code editor
 79     /// </summary>
 80     private void InitializeComponent()
 81     {
 82       this.cboPrices = new System.Windows.Forms.ComboBox();
 83       this.txtWidth = new System.Windows.Forms.TextBox();
 84       this.txtLength = new System.Windows.Forms.TextBox();
 85       this.label1 = new System.Windows.Forms.Label();
 86       this.label2 = new System.Windows.Forms.Label();
 87       this.btnCalculate = new System.Windows.Forms.Button();
 88       this.btnExit = new System.Windows.Forms.Button();
 89       this.label3 = new System.Windows.Forms.Label();
 90       this.txtSqYd = new System.Windows.Forms.TextBox();
 91       this.label4 = new System.Windows.Forms.Label();
 92       this.txtTotalCost = new System.Windows.Forms.TextBox();
 93       this.label5 = new System.Windows.Forms.Label();
 94       this.btnClear = new System.Windows.Forms.Button();
 95       this.btnHelp = new System.Windows.Forms.Button();
 96       this.SuspendLayout();
 97       //
 98       // cboPrices
 99       //
100       this.cboPrices.Items.AddRange(new object[] {
101                                "Choose a value",
102                                "5.50",
103                                "10.25",
104                                "14.75",
105                                "18.20",
106                                "21.95",
107                                "25.00"});
108       this.cboPrices.Location = new System.Drawing.Point(8, 32);
109       this.cboPrices.Name = "cboPrices";
110       this.cboPrices.Size = new System.Drawing.Size(112, 21);
111       this.cboPrices.TabIndex = 0;
112       //
113       // txtWidth
114       //
115       this.txtWidth.Location = new System.Drawing.Point(136, 32);
116       this.txtWidth.Name = "txtWidth";
117       this.txtWidth.Size = new System.Drawing.Size(72, 20);
118       this.txtWidth.TabIndex = 1;
119       this.txtWidth.Text = "";
120       this.txtWidth.TextAlign = System.Windows.Forms.HorizontalAlignment.Right;
121       //
122       // txtLength
123       //
124       this.txtLength.Location = new System.Drawing.Point(224, 32);
125       this.txtLength.Name = "txtLength";
126       this.txtLength.Size = new System.Drawing.Size(72, 20);
127       this.txtLength.TabIndex = 2;
128       this.txtLength.Text = "";
129       this.txtLength.TextAlign = System.Windows.Forms.HorizontalAlignment.Right;
130       //
131       // label1
132       //
133       this.label1.Location = new System.Drawing.Point(144, 8);
134       this.label1.Name = "label1";
135       this.label1.Size = new System.Drawing.Size(64, 16);
136       this.label1.TabIndex = 3;
137       this.label1.Text = "Width";
138       this.label1.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
139       //
140       // label2
141       //
142       this.label2.Location = new System.Drawing.Point(224, 8);
143       this.label2.Name = "label2";
144       this.label2.Size = new System.Drawing.Size(64, 16);
145       this.label2.TabIndex = 4;
146       this.label2.Text = "Length";
147       this.label2.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
148       //
149       // btnCalculate
150       //
151       this.btnCalculate.Location = new System.Drawing.Point(256, 80);
152       this.btnCalculate.Name = "btnCalculate";
153       this.btnCalculate.Size = new System.Drawing.Size(80, 24);
154       this.btnCalculate.TabIndex = 5;
155       this.btnCalculate.Text = "Calculate";
156       this.btnCalculate.Click += new System.EventHandler(this.btnCalculate_Click);
157       //
158       // btnExit
159       //
160       this.btnExit.Location = new System.Drawing.Point(352, 80);
161       this.btnExit.Name = "btnExit";
162       this.btnExit.Size = new System.Drawing.Size(80, 24);
163       this.btnExit.TabIndex = 6;
164       this.btnExit.Text = "Exit";
165       this.btnExit.Click += new System.EventHandler(this.btnExit_Click);
166       //
167       // label3
168       //
169       this.label3.Location = new System.Drawing.Point(312, 8);
170       this.label3.Name = "label3";
171       this.label3.Size = new System.Drawing.Size(64, 16);
172       this.label3.TabIndex = 8;
173       this.label3.Text = "Sq. Yd.";
174       this.label3.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
175       //
176       // txtSqYd
177       //
178       this.txtSqYd.Location = new System.Drawing.Point(312, 32);
179       this.txtSqYd.Name = "txtSqYd";
180       this.txtSqYd.ReadOnly = true;
181       this.txtSqYd.Size = new System.Drawing.Size(72, 20);
182       this.txtSqYd.TabIndex = 9;
183       this.txtSqYd.TabStop = false;
184       this.txtSqYd.Text = "";
185       this.txtSqYd.TextAlign = System.Windows.Forms.HorizontalAlignment.Right;
186       //
187       // label4
188       //
189       this.label4.Location = new System.Drawing.Point(408, 8);
190       this.label4.Name = "label4";
191       this.label4.Size = new System.Drawing.Size(64, 16);
192       this.label4.TabIndex = 10;
193       this.label4.Text = "Total Cost";
194       this.label4.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
195       //
196       // txtTotalCost
197       //
198       this.txtTotalCost.Location = new System.Drawing.Point(400, 32);
199       this.txtTotalCost.Name = "txtTotalCost";
200       this.txtTotalCost.ReadOnly = true;
201       this.txtTotalCost.Size = new System.Drawing.Size(88, 20);
202       this.txtTotalCost.TabIndex = 11;
203       this.txtTotalCost.TabStop = false;
204       this.txtTotalCost.Text = "";
205       this.txtTotalCost.TextAlign = System.Windows.Forms.HorizontalAlignment.Right;
206       //
207       // label5
208       //
209       this.label5.Location = new System.Drawing.Point(16, 8);
210       this.label5.Name = "label5";
211       this.label5.Size = new System.Drawing.Size(88, 16);
212       this.label5.TabIndex = 12;
213       this.label5.Text = "Cost per Sq. Yd.";
214       this.label5.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
215       //
216       // btnClear
217       //
218       this.btnClear.Location = new System.Drawing.Point(160, 80);
219       this.btnClear.Name = "btnClear";
220       this.btnClear.Size = new System.Drawing.Size(80, 24);
221       this.btnClear.TabIndex = 13;
222       this.btnClear.Text = "Clear";
223       this.btnClear.Click += new System.EventHandler(this.btnClear_Click);
224       //
225       // btnHelp
226       //
227       this.btnHelp.Location = new System.Drawing.Point(64, 80);
228       this.btnHelp.Name = "btnHelp";
229       this.btnHelp.Size = new System.Drawing.Size(80, 24);
230       this.btnHelp.TabIndex = 14;
231       this.btnHelp.Text = "Help";
232       this.btnHelp.Click += new System.EventHandler(this.btnHelp_Click);
233       //
234       // CarpetCalculator
235       //
236       this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
237       this.ClientSize = new System.Drawing.Size(496, 118);
238       this.Controls.Add(this.btnHelp);
239       this.Controls.Add(this.btnClear);
240       this.Controls.Add(this.label5);
241       this.Controls.Add(this.txtTotalCost);
242       this.Controls.Add(this.label4);
243       this.Controls.Add(this.txtSqYd);
244       this.Controls.Add(this.label3);
245       this.Controls.Add(this.btnExit);
246       this.Controls.Add(this.btnCalculate);
247       this.Controls.Add(this.label2);
248       this.Controls.Add(this.label1);
249       this.Controls.Add(this.txtLength);
250       this.Controls.Add(this.txtWidth);
251       this.Controls.Add(this.cboPrices);
252       this.Name = "CarpetCalculator";
253       this.Text = "Worksheet 06 - Carpet Cost Calculator - by Pat Moss";
254       this.Load += new System.EventHandler(this.CarpetCalculator_Load);
255       this.ResumeLayout(false);
256 
257     }
258     #endregion
259 
260     /// <summary>
261     /// The main entry point for the application
262     /// </summary>
263     [STAThread]
264     static void Main()
265     {
266       Application.Run(new CarpetCalculator());
267     }
268 
269     // Form load event
270     // Initialize the screen controls
271     private void CarpetCalculator_Load(object sender, System.EventArgs e)
272     {
273       InitScreenControls();
274     }
275 
276     // "Help" button event
277     // The user has clicked on the "Help" button
278     // Display user help information
279     private void btnHelp_Click(object sender, System.EventArgs e)
280     {
281       string helpinfo = "";
282       helpinfo += "1. Choose a Cost per Sq. Yd.\n";
283       helpinfo += "2. Enter a Width in yards.\n";
284       helpinfo += "3. Enter a Length in yards.\n";
285       helpinfo += "4. Click on Calculate.\n";
286       MessageBox.Show(helpinfo, "Carpet Cost Calculator Help",
287         MessageBoxButtons.OK, MessageBoxIcon.Information,
288         MessageBoxDefaultButton.Button1);
289     }
290 
291     // "Clear" button event
292     // The user has clicked on the "Clear" button
293     // Initialize the screen controls
294     private void btnClear_Click(object sender, System.EventArgs e)
295     {
296       InitScreenControls();
297     }
298 
299     // Initialize the screen controls
300     private void InitScreenControls()
301     {
302       cboPrices.SelectedIndex = 0;
303       txtWidth.Text = "0";
304       txtLength.Text = "0";
305       txtSqYd.Text = "0";
306       txtTotalCost.Text = "$0.00";
307     }
308 
309     // "Calculate" button event
310     // The user has clicked on the "Calculate" button
311     // so calculate the square yardage and the total carpet cost.
312     // Use try/catch blocks to trap for non-numeric input data errors.
313     // Round each extended amount to two decimal places.
314     // Display the SqYd and Carpet Cost amounts on the screen.
315     private void btnCalculate_Click(object sender, System.EventArgs e)
316     {
317       string strPrice = "";
318       string strWidth = "";
319       string strLength = "";
320 
321       double dblPrice = 0;
322       double dblWidth = 0;
323       double dblLength = 0;
324       double dblSqYd = 0;
325       double dblTotal = 0;
326 
327       bool inperror = false;
328 
329       strPrice = cboPrices.SelectedItem.ToString();
330       strWidth = txtWidth.Text;
331       strLength = txtLength.Text;
332 
333       txtSqYd.Text = "0";
334       txtTotalCost.Text = "$0.00";
335 
336       try
337       {
338         dblPrice = double.Parse(strPrice);
339       }
340       catch
341       {
342         string helpinfo = "Cost per Sq. Yd.: Please choose a value.";
343         MessageBox.Show(helpinfo, "Bad Input Data",
344           MessageBoxButtons.OK, MessageBoxIcon.Error,
345           MessageBoxDefaultButton.Button1);
346         cboPrices.SelectedIndex = 0;
347         cboPrices.Focus();
348         inperror = true;
349       }
350 
351       try
352       {
353         dblWidth = double.Parse(strWidth);
354       }
355       catch
356       {
357         string helpinfo = "Width: Please enter a numeric value.";
358         MessageBox.Show(helpinfo, "Bad Input Data",
359           MessageBoxButtons.OK, MessageBoxIcon.Error,
360           MessageBoxDefaultButton.Button1);
361         if (!inperror) txtWidth.Focus();
362         inperror = true;
363       }
364 
365       try
366       {
367         dblLength = double.Parse(strLength);
368       }
369       catch
370       {
371         string helpinfo = "Length: Please enter a numeric value.";
372         MessageBox.Show(helpinfo, "Bad Input Data",
373           MessageBoxButtons.OK, MessageBoxIcon.Error,
374           MessageBoxDefaultButton.Button1);
375         if (!inperror) txtLength.Focus();
376         inperror = true;
377       }
378 
379       if (!inperror)
380       {
381         dblPrice = Math.Round(dblPrice, 2);
382         dblWidth = Math.Round(dblWidth, 2);
383         dblLength = Math.Round(dblLength, 2);
384 
385         dblSqYd = dblWidth * dblLength;
386         dblSqYd = Math.Round(dblSqYd, 2);
387 
388         dblTotal = dblPrice * dblSqYd;
389         dblTotal = Math.Round(dblTotal, 2);
390 
391         txtSqYd.Text = dblSqYd.ToString();
392         txtTotalCost.Text = dblTotal.ToString("c");
393       }
394     }
395 
396     // "Exit" button event
397     // The user has clicked on the "Exit" button
398     // so exit from this application now.
399     private void btnExit_Click(object sender, System.EventArgs e)
400     {
401       this.Close();
402     }
403   }
404 }