Re: Problem with TestOut's C# For Programmers

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Thanks for posting the whole question. What's your specific problem? Since
this is a very basic task, I'm afraid you may have problems with language
basics, and in this case, just giving you just a plain answer would be of no
use to you

<psl66_uk@xxxxxxxxxxx> wrote in message
news:1137345590.697903.167640@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> "Lebesgue" <nos...@xxxxxxx> wrote:
>
>>What internet browser are you using? What spyware protection / firewall
>>software are you using (these can block popup windows)?
>>And finally, since this is a C# group, what was the question you got stuck
>>on? Maybe people here could tell you what the correct answer is and why-
>
> The reason for asking here is that maybe someone has encountered this
> problem and figured out a solution (it would avoid me asking :-).
>
> This is the TestOut Question
>
> Q:
>
> You have been asked to create a data type that can easily store and
> convert distances of various kinds. Because a distance only consists of
> a length value and associated units, a struct type seems to be a good
> fit.
>
> Do the following to create the needed struct data type:
>
> Create a new class file called Distance.
> Define a public enum called DistanceUnits with Inches, Feet, and Meters
> as named values.
> Create a public struct called Distance.
> Define a public field in the Distance struct called Value of type
> double.
> Define a public field in the Distance struct called Units of type
> DistanceUnits.
> Define a constructor in Distance that will set the Value and Units
> fields (in that order).
> Define a public method in Distance called Convert that takes a
> parameter of type DistanceUnits that identifies a new unit of measure.
> The Convert method should do the following:
> Convert the Value field from the current instance to the new unit of
> measure identified by the parameter.
> Create a new instance of Distance setting the Value and Units in the
> new instance based on the converted value and the new unit of measure.
> Return the new Distance struct.
> A simple way to convert from one unit of measure to another is to use a
> switch statement to convert the current value to an intermediate value
> in known units (such as inches). Then use a second switch statement to
> convert the intermediate value to the requested new unit of measure.
>
> Use the following conversion values: 12 inches = 1 foot; 39.37 inches =
> 1 meter.
>
> Run the test program to verify your code. Enter a distance value in the
> edit box and select an original and new unit of measure from the drop
> down list boxes. The converted distance should appear.
>
>
> The simulation has a form consisting of the following:
>
> Type: Label, Name: Label1, Text: Distance:
> Type: TextBox, Name: valueTextBox, Text: 0
> Type: ComboBox, Name: fromComboBox
> Type: Label, Name: valueLabel, Text: ?
> Type: ComboBox, Name: toComboBox
>
> The code behind the form is the one below:
>
> using System;
> using System.Drawing;
> using System.Collections;
> using System.ComponentModel;
> using System.Windows.Forms;
> using System.Data;
>
> namespace Structs
> {
> /// <summary>
> /// Summary description for Form1.
> /// </summary>
> public class Form1 : System.Windows.Forms.Form
> {
> private System.Windows.Forms.Label Label1;
> private System.Windows.Forms.TextBox valueTextBox;
> private System.Windows.Forms.ComboBox fromComboBox;
> private System.Windows.Forms.Label Label2;
> private System.Windows.Forms.Label valueLabel;
> private System.Windows.Forms.ComboBox toComboBox;
> /// <summary>
> /// Required designer variable.
> /// </summary>
> private System.ComponentModel.Container components = null;
>
> public Form1()
> {
> //
> // Required for Windows Form Designer support
> //
> InitializeComponent();
>
> //
> // TODO: Add any constructor code after InitializeComponent call
> //
> }
>
> /// <summary>
> /// Clean up any resources being used.
> /// </summary>
> protected override void Dispose( bool disposing )
> {
> if( disposing )
> {
> if (components != null)
> {
> components.Dispose();
> }
> }
> base.Dispose( disposing );
> }
>
> #region Windows Form Designer generated code
> /// <summary>
> /// Required method for Designer support - do not modify
> /// the contents of this method with the code editor.
> /// </summary>
> private void InitializeComponent()
> {
> this.components = new System.ComponentModel.Container();
> this.toComboBox = new System.Windows.Forms.ComboBox();
> this.valueLabel = new System.Windows.Forms.Label();
> this.Label2 = new System.Windows.Forms.Label();
> this.fromComboBox = new System.Windows.Forms.ComboBox();
> this.valueTextBox = new System.Windows.Forms.TextBox();
> this.Label1 = new System.Windows.Forms.Label();
> this.SuspendLayout();
> //
> // toComboBox
> //
> this.toComboBox.DropDownStyle =
> System.Windows.Forms.ComboBoxStyle.DropDownList;
> this.toComboBox.Location = new System.Drawing.Point(328, 16);
> this.toComboBox.Name = "toComboBox";
> this.toComboBox.Size = new System.Drawing.Size(80, 21);
> this.toComboBox.TabIndex = 6;
> this.toComboBox.SelectedIndexChanged += new
> System.EventHandler(ComboBox_SelectedIndexChanged);
> //
> // valueLabel
> //
> this.valueLabel.TextAlign =
> System.Drawing.ContentAlignment.TopCenter;
> this.valueLabel.Location = new System.Drawing.Point(248, 16);
> this.valueLabel.Name = "valueLabel";
> this.valueLabel.Size = new System.Drawing.Size(72, 23);
> this.valueLabel.TabIndex = 5;
> this.valueLabel.Text = "?";
> //
> // Label2
> //
> this.Label2.TextAlign = System.Drawing.ContentAlignment.TopCenter;
> this.Label2.Location = new System.Drawing.Point(232, 16);
> this.Label2.Name = "Label2";
> this.Label2.Size = new System.Drawing.Size(16, 24);
> this.Label2.TabIndex = 4;
> this.Label2.Text = "=";
> //
> // fromComboBox
> //
> this.fromComboBox.DropDownStyle =
> System.Windows.Forms.ComboBoxStyle.DropDownList;
> this.fromComboBox.Location = new System.Drawing.Point(152, 16);
> this.fromComboBox.Name = "fromComboBox";
> this.fromComboBox.Size = new System.Drawing.Size(80, 21);
> this.fromComboBox.TabIndex = 3;
> this.fromComboBox.SelectedIndexChanged += new
> System.EventHandler(ComboBox_SelectedIndexChanged);
> //
> // valueTextBox
> //
> this.valueTextBox.Text = "0";
> this.valueTextBox.TextAlign =
> System.Windows.Forms.HorizontalAlignment.Center;
> this.valueTextBox.Location = new System.Drawing.Point(72, 16);
> this.valueTextBox.Name = "valueTextBox";
> this.valueTextBox.Size = new System.Drawing.Size(72, 20);
> this.valueTextBox.TabIndex = 2;
> this.valueTextBox.TextChanged += new
> System.EventHandler(ComboBox_SelectedIndexChanged);
> //
> // Label1
> //
> this.Label1.Location = new System.Drawing.Point(16, 16);
> this.Label1.Name = "Label1";
> this.Label1.Size = new System.Drawing.Size(56, 23);
> this.Label1.TabIndex = 1;
> this.Label1.Text = "Distance:";
> //
> // Form1
> //
> this.ClientSize = new System.Drawing.Size(424, 54);
> this.Controls.Add(this.toComboBox);
> this.Controls.Add(this.valueLabel);
> this.Controls.Add(this.Label2);
> this.Controls.Add(this.fromComboBox);
> this.Controls.Add(this.valueTextBox);
> this.Controls.Add(this.Label1);
> this.Text = "Distance Convert";
> this.Load += new System.EventHandler(Form1_Load);
> this.ResumeLayout();
> }
> #endregion
>
> /// <summary>
> /// The main entry point for the application.
> /// </summary>
> [STAThread]
> static void Main()
> {
> Application.Run(new Form1());
> }
>
> private void Form1_Load(object sender, System.EventArgs e)
> {
> foreach ( string s in Enum.GetNames(typeof(DistanceUnits)) )
> {
> fromComboBox.Items.Add(s);
> toComboBox.Items.Add(s);
> }
> fromComboBox.SelectedIndex = 0;
> toComboBox.SelectedIndex = 0;
> }
>
> private void ComboBox_SelectedIndexChanged(object sender,
> System.EventArgs e)
> {
> try
> {
> Distance inD = new Distance(Convert.ToDouble(valueTextBox.Text),
> (DistanceUnits)fromComboBox.SelectedIndex);
> Distance outD =
> inD.Convert((DistanceUnits)toComboBox.SelectedIndex);
> valueLabel.Text = String.Format("{0:0.#####}", outD.Value);
> }
> catch
> {
> valueLabel.Text = "?";
> }
> }
> }
> }
>
>
> Thank you in anticipation.
>


.

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