我的第一个winform计算器小程序... ...
有很多不尽人意的地方 请大家指导指导
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
namespace 计算器
{
public partial class Form1 : Form
{
int i1=0;
public Form1()
{
InitializeComponent();
}
private void button_Click(object sender, EventArgs e)
{
string str1 = txt1.Text;
if (str1[0] == '0' && str1.Length == 1)
{
txt1.Text = Convert.ToString("1");
}
else
{
txt1.Text = Convert.ToString(str1 + "1");
}
}
private void btn2_Click(object sender, EventArgs e)
{
string str1 = txt1.Text;
if (str1[0] == '0' && str1.Length == 1)
{
txt1.Text = Convert.ToString("2");
}
else
{
txt1.Text = Convert.ToString(str1 + "2");
}
}
private void btn3_Click(object sender, EventArgs e)
{
string str1 = txt1.Text;
if (str1[0] == '0' && str1.Length == 1)
{
txt1.Text = Convert.ToString("3");
}
else
{
txt1.Text = Convert.ToString(str1 + "3");
}
}
private void btn4_Click(object sender, EventArgs e)
{
string str1 = txt1.Text;
if (str1[0] == '0' && str1.Length == 1)
{
txt1.Text = Convert.ToString("4");
}
else
{
txt1.Text = Convert.ToString(str1 + "4");
}
}
private void btn5_Click(object sender, EventArgs e)
{
string str1 = txt1.Text;
if (str1[0] == '0' && str1.Length == 1)
{
txt1.Text = Convert.ToString("5");
}
else
{
txt1.Text = Convert.ToString(str1 + "5");
}
}
private void btn6_Click(object sender, EventArgs e)
{
string str1 = txt1.Text;
if (str1[0] == '0' && str1.Length == 1)
{
txt1.Text = Convert.ToString("6");
}
else
{
txt1.Text = Convert.ToString(str1 + "6");
}
}
private void btn7_Click(object sender, EventArgs e)
{
string str1 = txt1.Text;
if (str1[0] == '0' && str1.Length == 1)
{
txt1.Text = Convert.ToString("7");
}
else
{
txt1.Text = Convert.ToString(str1 + "7");
}
}
private void btn8_Click(object sender, EventArgs e)
{
string str1 = txt1.Text;
if (str1[0] == '0' && str1.Length == 1)
{
txt1.Text = Convert.ToString("8");
}
else
{
txt1.Text = Convert.ToString(str1 + "8");
}
}
private void btn9_Click(object sender, EventArgs e)
{
string str1 = txt1.Text;
if (str1[0] == '0' && str1.Length == 1)
{
txt1.Text = Convert.ToString("9");
}
else
{
txt1.Text = Convert.ToString(str1 + "9");
}
}
private void btn0_Click(object sender, EventArgs e)
{
string str1 = txt1.Text;
if (str1[0] == '0' &&str1.Length==1)
{
txt1.Text = Convert.ToString("0");
}
else
{
txt1.Text = Convert.ToString(str1 + "0");
}
}
private void button10_Click(object sender, EventArgs e)
{
string str1 = txt1.Text;
int i=str1.Length;
i = i - 1;
if (str1[i] == '0' || str1[i] == '1' || str1[i] == '2' || str1[i] == '3' || str1[i] == '4' || str1[i] == '5' || str1[i] == '6' || str1[i] == '7' || str1[i] == '8' || str1[i] == '9')
{
txt1.Text = str1 + '.';
}
else
{
return;
}
}
private void btnjia_Click(object sender, EventArgs e)
{
string str1 = txt1.Text;
int i = str1.Length;
i = i - 1;
if ((str1[i] == '+') || (str1[i] == '-') || (str1[i] == '*') || (str1[i] == '/'))
{
return;
}
else
{
txt1.Text = str1 + '+';
}
}
private void btnjian_Click(object sender, EventArgs e)
{
string str1 = txt1.Text;
int i = str1.Length;
i = i - 1;
if ((str1[i] == '+') || (str1[i] == '-') || (str1[i] == '*') || (str1[i] == '/'))
{
return;
}
else
{
txt1.Text = str1 + '-';
}
}
private void btncheng_Click(object sender, EventArgs e)
{
string str1 = txt1.Text;
int i = str1.Length;
i = i - 1;
if ((str1[i] == '+') || (str1[i] == '-') || (str1[i] == '*') || (str1[i] == '/'))
{
return;
}
else
{
txt1.Text = str1 + '*';
}
}
private void btnchu_Click(object sender, EventArgs e)
{
string str1 = txt1.Text;
int i = str1.Length;
i = i - 1;
if ((str1[i] == '+') || (str1[i] == '-') || (str1[i] == '*') || (str1[i] == '/'))
{
return;
}
else
{
txt1.Text = str1 + '/';
}
}
private void button15_Click(object sender, EventArgs e)
{
double i1, i2, i3, i4, i5, i6, i7;
string str1 = txt1.Text;
i4 = str1.IndexOf('+');
if (i4 >= 0)
{
string[] str2 = str1.Split('+');
double.TryParse(str2[0], out i1);
double.TryParse(str2[1], out i2);
i3 = i1 + i2;
txt1.Text = Convert.ToString(i3);
}
else
{
i5=str1.IndexOf('-');
if (i5>= 0)
{
string[] str2 = str1.Split('-');
double.TryParse(str2[0], out i1);
double.TryParse(str2[1], out i2);
i3 = i1 -i2;
txt1.Text = Convert.ToString(i3);
}
i6 = str1.IndexOf('*');
if (i6 >= 0)
{
string[] str2 = str1.Split('*');
double.TryParse(str2[0], out i1);
double.TryParse(str2[1], out i2);
i3 = i1 * i2;
txt1.Text = Convert.ToString(i3);
}
else
{
i7 = str1.IndexOf('/');
if (i7>= 0)
{
string[] str2 = str1.Split('/');
double.TryParse(str2[0], out i1);
double.TryParse(str2[1], out i2);
i3 = i1 / i2;
txt1.Text = Convert.ToString(i3);
}
}
}
}
private void button2_Click(object sender, EventArgs e)
{
int i;
string str1 = txt1.Text;
i = str1.Length;
string str2 = str1.Substring(0, i - 1);
txt1.Text = str2;
}
private void button1_Click(object sender, EventArgs e)
{
txt1.Text = Convert.ToString(0);
}
}
}