C#编程三步走之完整代码

最后，请看完整的代码：
using System;
using System.WinForms;

public class TempConverter : System.WinForms.Form
{

LabellTempFah = new Label();
LabellTempCel = new Label();
TextBox tTempFah = new TextBox();
TextBox tTempCel = new TextBox();
ButtonbnCtoF = new Button();
ButtonbnFtoC = new Button();

public TempConverter() {
this.SetSize(180,90);
this.BorderStyle =
FormBorderStyle.FixedDialog;
this.Text = " +C －> +F /+F －> +C ";
this.StartPosition =
FormStartPosition.CenterScreen;
this.HelpButton = false;
this.MaximizeBox = false;
tTempCel.TabIndex = 0;
tTempCel.SetSize(50,25);
tTempCel.SetLocation(13,5);
lTempCel.TabStop = false;
lTempCel.Text = "C";
lTempCel.SetSize(25, 25);
lTempCel.SetLocation(65,5);
tTempFah.TabIndex = 1;
tTempFah.SetSize(50,25);
tTempFah.SetLocation(90,5);
lTempFah.TabStop = false;
lTempFah.Text = "F";
lTempFah.SetSize(25,25);
lTempFah.SetLocation(142,5);
bnCtoF.TabIndex = 2;
bnCtoF.Text = "C to F";
bnCtoF.SetSize(70,25);
bnCtoF.SetLocation(13,35);
bnCtoF.Click += new EventHandler
(this.bnCtoF_Click);
bnFtoC.TabIndex = 3;
bnFtoC.Text = "F to C";
bnFtoC.SetSize(70,25);
bnFtoC.SetLocation(90,35);
bnFtoC.Click += new EventHandler
(this.bnFtoC_Click);
this.Controls.Add(tTempCel);
this.Controls.Add(lTempCel);
this.Controls.Add(tTempFah);
this.Controls.Add(lTempFah);
this.Controls.Add(bnCtoF);
this.Controls.Add(bnFtoC);
//= new Control [] { tTempCel, lTempCel, tTempFah,
lTempFah, bnCtoF, bnFtoC };
}

public static void Main() {
Application.Run( newTempConverter() );
}

private void bnCtoF_Click(Object sender,
EventArgs e) {
double dTempCel = 0;
double dTempFah = 0;
try { dTempCel = tTempCel.Text.ToDouble(); }
catch(Exception) {
tTempCel.Clear();
tTempFah.Clear();
return;
}
dTempFah = 1.8*dTempCel+32;
tTempFah.Text = dTempFah.ToString();
tTempFah.Focus();
tTempFah.SelectionStart = 0;
tTempFah.SelectionLength = 0;
tTempCel.Focus();
tTempCel.SelectionStart = 0;
tTempCel.SelectionLength = 0;
}

private void bnFtoC_Click(Object sender,
EventArgs e) {
double dTempCel = 0;
double dTempFah = 0;
try { dTempFah = tTempFah.Text.ToDouble(); }
catch(Exception) {
tTempCel.Clear();
tTempFah.Clear();
return;
}
dTempCel = (dTempFah-32)/1.8;
tTempCel.Text = dTempCel.ToString();
tTempCel.Focus();
tTempCel.SelectionStart = 0;
tTempCel.SelectionLength = 0;
tTempFah.Focus();
tTempFah.SelectionStart = 0;
tTempFah.SelectionLength = 0;
}
}