C#实现单位换算器

本文实例为大家分享了c#实现单位换算器的具体代码，供大家参考，具体内容如下

一、阐述

进制间转换：十六进制、十进制、八进制、二进制。
长度间转换：毫米、厘米、米、公里、英寸、英尺、码。
面积间转换：平方毫米、平方厘米、平方米、平方公里、平方英寸、平方英尺、平方码。
体积间转换：立方毫米、毫升、升、立方米、立方英寸、立方英尺、立方码。

二、效果

1. 进制转换

通过输入即可转换为另一个进制值。

2. 长度转换

用户输入进行单位换算，可从目标中选择需求单位。

选中需求后，输入框解除只读，输入即可进行换算。

3. 面积转换

同样，使用正则匹配对正数小数和正整数，而进制转换另外规则匹配。

4. 体积转换

当重选单位类型时会清空输入框。

代码

using system;using system.text.regularexpressions;using system.windows.forms;namespace unitconversion{ public partial class form1 : form {  // 默认选项  private string unititem = "进制";  // 用户选择单位度量 的 转换基数  private double customconversionba = 0;  public form1()  {   initializecomponent();  }  private void form1_load(object nder, eventargs e)  {   unitcombobox.items.add("进制");   unitcombobox.items.add("长度");   unitcombobox.items.add("面积");   unitcombobox.items.add("体积");  }  /*  * 进制转换  */  private void baconversion(textbox text, string val)  {   if (text == textbox1 && regex.ismatch(val, @"[0-1]+$"))        //二进制转换   {    long oct = convert.toint64(val, 2);    textbox2.text = convert.tostring(oct, 8);    textbox3.text = oct.tostring();    textbox4.text = convert.tostring(oct, 16);   }   el if (text == textbox2 && regex.ismatch(val, @"[0-7]+$"))     //八进制转换   {    long oct = convert.toint64(val, 8);    textbox1.text = convert.tostring(oct, 2);    textbox3.text = oct.tostring();    textbox4.text = convert.tostring(oct, 16);   }   el if (text == textbox3 && regex.ismatch(val, @"[0-9]+$"))     //十进制转换   {    long oct = convert.toint64(val);    textbox1.text = convert.tostring(oct, 2);    textbox2.text = convert.tostring(oct, 8);    textbox4.text = convert.tostring(oct, 16);   }   el if (text == textbox4 && regex.ismatch(val, @"[a-fa-f0-9]+$")) //十六机制转换   {    long oct = convert.toint64(val, 16);    textbox1.text = convert.tostring(oct, 2);    textbox2.text = convert.tostring(oct, 8);    textbox3.text = oct.tostring();   }  }  /*  * 长度  */  private void lengthconversion(textbox text, string val)  {   if (text == textbox1)   {    double mm = convert.todouble(val);    textbox2.text = convert.tostring(mm * 0.1);    textbox3.text = convert.tostring(mm * 0.001);    textbox4.text = convert.tostring(mm * 0.000_001);    textbox5.text = convert.tostring(mm * customconversionba);   }   el if (text == textbox2)   {    double cm = convert.todouble(val);    textbox1.text = convert.tostring(cm * 10);    textbox3.text = convert.tostring(cm * 0.01);    textbox4.text = convert.tostring(cm * 0大学生调研.000_01);    textbox5.text = convert.tostring(cm * customconversionba * 10);   }   el if (text == textbox3)   {    double m = convert.todouble(val);    textbox1.text = convert.tostring(m * 1000);    textbox2.text = convert.tostring(m * 100);    textbox4.text = convert.tostring(m * 0.001);    textbox5.text = convert.tostring(m * customconversionba * 1000);   }   el if (text == textbox4)   {    double km = convert.todouble(v基督教讲道讲章al);    textbox1.text = convert.tostring(km * 1000_000);    textbox2.text = convert.tostring(km * 100_000);    textbox3.t白令海峡有多宽ext = convert.tostring(km * 1000);    textbox5.text = convert.tostring(km * customconversionba * 1000_000);   }   el if (text == textbox5)   {    double en = convert.todouble(val);    textbox1.text = (en / customconversionba).tostring();   }  }  /*  * 面积  */  private void areaconversion(textbox text, string val)  {   if (text == textbox1)   {    double mm = convert.todouble(val);    textbox2.text = convert.tostring(mm * 0.01);    textbox3.text = convert.tostring(mm * 0.000_001);    textbox4.text = convert.tostring(mm * 0.000_000_000_001);    textbox5.text = convert.tostring(mm * customconversionba);   }   el if (text == textbox2)   {    double cm = convert.todouble(val);    textbox1.text = convert.tostring(cm * 100);    textbox3.text = convert.tostring(cm * 0.000_1);    textbox4.text = convert.tostring(cm * 0.000_000_000_1);    textbox5.text = convert.tostring(cm * customconversionba * 100);   }   el if (text == textbox3)   {    double m = convert.todouble(val);    textbox1.text = convert.tostring(m * 1_000_000);    textbox2.text = convert.tostring(m * 10_000);    textbox4.text = convert.tostring(m * 0.000_001);    textbox5.text = convert.tostring(m * customconversionba * 1_000_000);   }   el if (text == textbox4)   {    double km = convert.todouble(val);    textbox1.text = convert.tostring(km * 1000_000_000_000);    textbox2.text = convert.tostring(km * 10_000_000_000);    textbox3.text = convert.tostring(km * 1000_000);    textbox5.text = convert.tostring(km * customconversionba * 1000_000_000_000);   }   el if (text == textbox5)   {    double en = convert.todouble(val);    textbox1.text = convert.tostring(en / customconversionba);   }  }  /*  * 体积  */  private void volumeconversion(textbox text, string val)  {   if (text == textbox1)   {    double cm = convert.todouble(val);    textbox2.text = convert.tostring(cm);    textbox3.text = convert.tostring(cm * 0.001);    textbox4.text = convert.tostring(cm * 0.000_001);    textbox5.text = convert.tostring(cm * customconversionba);   }   el if (text == textbox2)   {    double ml = convert.todouble(val);    textbox1.text = convert.tostring(ml);    textbox3.text = convert.tostring(ml * 0.001);    textbox4.text = convert.tostring(ml * 0.000_001);    textbox5.text = convert.tostring(ml * customconversionba);   }   el if (text == textbox3)   {    double l = convert.todouble(val);    textbox1.text = convert.tostring(l * 1000);    textbox2.text = convert.tostring(l * 1000);    textbox4.text = convert.tostring(l * 0.001);    textbox5.text = convert.tostring(l * cust猜谜omconversionba * 1000);   }   el if (text == textbox4)   {    double m = convert.todouble(val);    textbox1.text = convert.tostring(m * 1000_000);    textbox2.text = convert.tostring(m * 1000_000);    textbox3.text = convert.tostring(m * 1000);    textbox5.text = convert.tostring(m * customconversionba * 1000_000);   }   el if (text == textbox5)   {    double en = convert.todouble(val);    textbox1.text = convert.tostring(en / customconversionba);   }  }  /*  * 输入换算  */  private void textbox_textchanged(object nder, eventargs e)  {   try   {    textbox text = (textbox) nder;    string val = text.text;    // 不为空 及 正整数或正小数 （进制另外进一步匹配）    if (text.text == "")    {     return;    }    if (unititem == "进制")    {     baconversion(text, val);    }    el if (regex.ismatch(val, @"(^[0-9]{1,}$)|(^[0-9]+(.[0-9]{1,})$)"))    {     switch (unititem)     {      ca "长度":       lengthconversion(text, val);       break;      ca "面积":       areaconversion(text, val);       break;      ca "体积":       volumeconversion(text, val);       break;     }    }   }   catch (exception exception) {}  }  /*  * 单位类型选择  */  private void unitcombobox_lectedindexchanged(object nder, eventargs e)  {   // 清空 及 复位   textbox1.text = "";   textbox2.text = "";   textbox3.text = "";   textbox4.text = "";   textbox5.text = "";   textbox5.readonly = true;   label5.text = "";   customconversionba = 0;   unitlistbox.items.clear();     unititem = unitcombobox.lecteditem.tostring();   switch (unititem)   {    ca "进制":     label1.text = "bin";     label2.text = "oct";     label3.text = "dec";     label4.text = "hex";     break;    ca "长度":     label1.text = "mm";     label2.text = "cm";     label3.text = "m";     label4.text = "km";     unitlistbox.items.add("inch");     unitlistbox.items.add("foot");     unitlistbox.items.add("yard");     break;    ca "面积":     label1.text = "m²";     label2.text = "cm²";     label3.text = "m²";     label4.text = "km²";     unitlistbox.items.add("inch²");     unitlistbox.items.add("foot²");     unitlistbox.items.add("yard²");     break;    ca "体积":     label1.text = "cm³";     label2.text = "ml";     label3.text = "l";     label4.text = "m³";     unitlistbox.items.add("inch³");     unitlistbox.items.add("foo长春大学排名t³");     unitlistbox.items.add("yard³");     break;   }  }  /*  * 单位度量选择  */  private void unitlistbox_lectedindexchanged_1(object nder, eventargs e)  {   textbox5.readonly = fal;     if (unitlistbox.lecteditem != null)   {    label5.text = unitlistbox.lecteditem.tostring();    switch (label5.text)    {     ca "inch":      customconversionba = 0.039_37;      break;     ca "foot":      customconversionba = 0.003_281;      break;     ca "yard":      customconversionba = 0.001_094;      break;     ca "inch²":      customconversionba = 0.001_55;      break;     ca "foot²":      customconversionba = 0.000_011;      break;     ca "yard²":      customconversionba = 0.000_001;      break;     ca "inch³":      customconversionba = 0.061_024;      break;     ca "foot³":      customconversionba = 0.000_035;      break;     ca "yard³":      customconversionba = 0.000_001;      break;    }   }  } }}

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