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【 temperature warning program DE development 】 event driven model instance

2022-08-05 10:03:00 【51CTO】

写在开头：

       
         Event driven model has in the previous article gave you a simple and vivid introduction,接下
       
To will introduce in detail.Welcome to little brothervx：“Programming little brother linghu”.
       
【项目需求】
       
     To develop a temperature real-time monitoring program,Program can tip temperature changes according to the variation of temperature,
       
Corresponding change color,Strengthen the tip effect.
       
【思路/体会】
       
     Real-time changes in temperature can be generated by random function called object,Dynamic display of the value.颜色变化
       
可以通过Windows .NETThe color of library provides library call.The key is how you start the procedure
       
Start make it on their own,This can be enabledTimmer控件,设置时间间隔,封装函数,外
       
The call.Throughout the entire development is event-driven programming ideas.
      
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文章目录

一.Define information related classes and events alarm
1.1The first step in the declaration delegate type
1.2The second step custom event alarm：
1.2.1Declare our delegate type
1.2.2声明事件
1.2.3Starting to monitor the temperature,同时发布事件
1.2.4Methods that need the statement event
二.事件调用
2.1In the receiver class to subscribe to events
2.2Trigger button to start the timer
三.效果图展示
3.1图示
3.2代码
3.3代码下载地址

一.Define information related classes and events alarm

Why do you want to talk about delegate type？Can entrust is a kind of dynamic method is called type,属于引用型.C#Implementing event-driven programming model is the main way is to use method to realize the dynamic invocation delegate type.
Before we always through a pointer or object variable access memory address,But now we need to use delegate object references memory address to realize transmission and call.

1.1The first step in the declaration delegate type

我们自己定义了一个事件数据类型：TemperatureEventArgs,It is us to define a类,We sealed inside we need数据信息.

Our class name is our事件数据类型,它同样具有类的所有特性,Such as the definition method to construct,方法,The property and so on.We define the events数据类型为TemperatureEventArgs,它是从EventArgsAre derived from.它的目的就是:
To provide all the fields need to preserve the event data or attribute,Such event publisher specific data can be sent to the receiver.

       
       class 
       
       TemperatureEventArgs:
       
       EventArgs{
       
       private 
       
       int 
       
       temperature;
       
       //TemperatureEventArgs是一个类
       
       public 
       
       TemperatureEventArgs(
       
       int 
       
       temperature)
       
       //声明构造函数
       
        {
       
       this.
       
       temperature 
       
       = 
       
       temperature;
       
        }
       
       public 
       
       int 
       
       Temperate
       
       //定义只读属性
       
        {
       
       //专门定义一个Temperature方法来返回数据
       
       get
       
            {
       
       return 
       
       temperature;
       
            }
       
        }
       
}
      
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1.2The second step custom event alarm：

1.2.1Declare our delegate type

Statement format is：

public delegate 返回值类型 委托类型名(object sender,事件数据类型 e);

code:
We entrust type name is custom yo！

       
       public 
       
       delegate 
       
       void 
       
       TemperatureHandler(
       
       object 
       
       sender, 
       
       TemperatureEventArgs 
       
       e);
      
1.

1.2.2声明事件

Statement format is：

public event 委托类型名 事件名;
PS： The event name best withOn_Beginning more spec！

       
       public 
       
       event 
       
       TemperatureHandler 
       
       OnWarning;
      
1.

1.2.3Starting to monitor the temperature,同时发布事件

       
       public 
       
       void 
       
       Monitor(
       
       int 
       
       tp)
       
        {
       
       TemperatureEventArgs 
       
       e 
       
       = 
       
       new 
       
       TemperatureEventArgs(
       
       tp);
       
       if (
       
       OnWarning 
       
       != 
       
       null)
       
            {
       
       OnWarning(
       
       this, 
       
       e);
       
            }
       
        }
      
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1.2.4Methods that need the statement event

       
       //第三步 Statement event method is called
       
       private 
       
       void 
       
       Tw_OnWarning(
       
       object 
       
       sender, 
       
       TemperatureEventArgs 
       
       e)
       
        {
       
       if (
       
       e.
       
       Temperate 
       
       < 
       
       35)
       
            {
       
       lblShow.
       
       Text 
       
       = 
       
       "正常";
       
       lblColor.
       
       BackColor 
       
       = 
       
       Color.
       
       Blue;
       
            }
       
       else 
       
       if (
       
       e.
       
       Temperate 
       
       < 
       
       37)
       
            {
       
       lblShow.
       
       Text 
       
       = 
       
       "高温黄色预警";
       
       lblColor.
       
       BackColor 
       
       = 
       
       Color.
       
       Yellow;
       
            }
       
       else 
       
       if (
       
       e.
       
       Temperate 
       
       < 
       
       40)
       
            {
       
       lblShow.
       
       Text 
       
       = 
       
       "高温橙色预警";
       
       lblColor.
       
       BackColor 
       
       = 
       
       Color.
       
       Orange;
       
            }
       
       else 
       
       if (
       
       e.
       
       Temperate 
       
       < 
       
       37)
       
            {
       
       lblShow.
       
       Text 
       
       = 
       
       "高温红色预警";
       
       lblColor.
       
       BackColor 
       
       = 
       
       Color.
       
       Red;
       
            }
       
        }
       
    }
      
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二.事件调用

写上代码：

       
       private 
       
       void 
       
       Tw_OnWarning(
       
       object 
       
       sender, 
       
       TemperatureEventArgs 
       
       e)
       
        {
       
       if (
       
       e.
       
       Temperate 
       
       < 
       
       35)
       
            {
       
       lblShow.
       
       Text 
       
       = 
       
       "正常";
       
       lblColor.
       
       BackColor 
       
       = 
       
       Color.
       
       Blue;
       
            }
       
       else 
       
       if (
       
       e.
       
       Temperate 
       
       < 
       
       37)
       
            {
       
       lblShow.
       
       Text 
       
       = 
       
       "高温黄色预警";
       
       lblColor.
       
       BackColor 
       
       = 
       
       Color.
       
       Yellow;
       
            }
       
       else 
       
       if (
       
       e.
       
       Temperate 
       
       < 
       
       40)
       
            {
       
       lblShow.
       
       Text 
       
       = 
       
       "高温橙色预警";
       
       lblColor.
       
       BackColor 
       
       = 
       
       Color.
       
       Orange;
       
            }
       
       else 
       
       if (
       
       e.
       
       Temperate 
       
       < 
       
       37)
       
            {
       
       lblShow.
       
       Text 
       
       = 
       
       "高温红色预警";
       
       lblColor.
       
       BackColor 
       
       = 
       
       Color.
       
       Red;
       
            }
       
        }
      
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2.1In the receiver class to subscribe to events

       
       tw.
       
       OnWarning 
       
       += 
       
       new 
       
       TemperatureWaring.
       
       TemperatureHandler(
       
       Tw_OnWarning);
      
1.

Good statement before you subscribe to our object

       
       TemperatureWaring 
       
       tw 
       
       = 
       
       new 
       
       TemperatureWaring();
      
1.

2.2Trigger button to start the timer

We set up our firsttimmer,Adjust the time interval1000s
代码：

       
       private 
       
       void 
       
       btnMonitor_Click(
       
       object 
       
       sender, 
       
       EventArgs 
       
       e)
       
        {
       
       timer1.
       
       Enabled 
       
       = 
       
       true;
       
        }
       
       private 
       
       void 
       
       timer1_Tick(
       
       object 
       
       sender, 
       
       EventArgs 
       
       e)
       
        {
       
       int 
       
       nowTemp;
       
       if (
       
       txtTemp.
       
       Text 
       
       == 
       
       "")
       
       nowTemp 
       
       = 
       
       35;
       
       else
       
       nowTemp 
       
       = 
       
       Convert.
       
       ToInt32(
       
       txtTemp.
       
       Text);
       
       int 
       
       change 
       
       = 
       
       r.
       
       Next(
       
       -
       
       2, 
       
       3);
       
       txtTemp.
       
       Text 
       
       = (
       
       change 
       
       + 
       
       nowTemp).
       
       ToString();
       
       //第五步 触发事件
       
       tw.
       
       Monitor(
       
       change 
       
       + 
       
       nowTemp);
       
        }
      
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三.效果图展示

3.1图示

【Temperature warning programde开发】Event driven model instance_数据

【Temperature warning programde开发】Event driven model instance_数据_02

【Temperature warning programde开发】Event driven model instance_c#_03

3.2代码

       
       using 
       
       System;
       
       using 
       
       System.
       
       Collections.
       
       Generic;
       
       using 
       
       System.
       
       ComponentModel;
       
       using 
       
       System.
       
       Data;
       
       using 
       
       System.
       
       Drawing;
       
       using 
       
       System.
       
       Linq;
       
       using 
       
       System.
       
       Text;
       
       using 
       
       System.
       
       Threading.
       
       Tasks;
       
       using 
       
       System.
       
       Windows.
       
       Forms;
       
       namespace 
       
       实例8__3
       
{
       
       public 
       
       partial 
       
       class 
       
       温度监控 : 
       
       Form
       
    {
       
       Random 
       
       r 
       
       = 
       
       new 
       
       Random();
       
       TemperatureWaring 
       
       tw 
       
       = 
       
       new 
       
       TemperatureWaring();
       
       public 
       
       温度监控()
       
        {
       
       InitializeComponent();
       
       //第四步 订阅事件
       
       tw.
       
       OnWarning 
       
       += 
       
       new 
       
       TemperatureWaring.
       
       TemperatureHandler(
       
       Tw_OnWarning);
       
        }
       
       private 
       
       void 
       
       btnMonitor_Click(
       
       object 
       
       sender, 
       
       EventArgs 
       
       e)
       
        {
       
       timer1.
       
       Enabled 
       
       = 
       
       true;
       
        }
       
       private 
       
       void 
       
       timer1_Tick(
       
       object 
       
       sender, 
       
       EventArgs 
       
       e)
       
        {
       
       int 
       
       nowTemp;
       
       if (
       
       txtTemp.
       
       Text 
       
       == 
       
       "")
       
       nowTemp 
       
       = 
       
       35;
       
       else
       
       nowTemp 
       
       = 
       
       Convert.
       
       ToInt32(
       
       txtTemp.
       
       Text);
       
       int 
       
       change 
       
       = 
       
       r.
       
       Next(
       
       -
       
       2, 
       
       3);
       
       txtTemp.
       
       Text 
       
       = (
       
       change 
       
       + 
       
       nowTemp).
       
       ToString();
       
       //第五步 触发事件
       
       tw.
       
       Monitor(
       
       change 
       
       + 
       
       nowTemp);
       
        }
       
       //第三步 Statement event method is called
       
       private 
       
       void 
       
       Tw_OnWarning(
       
       object 
       
       sender, 
       
       TemperatureEventArgs 
       
       e)
       
        {
       
       if (
       
       e.
       
       Temperate 
       
       < 
       
       35)
       
            {
       
       lblShow.
       
       Text 
       
       = 
       
       "正常";
       
       lblColor.
       
       BackColor 
       
       = 
       
       Color.
       
       Blue;
       
            }
       
       else 
       
       if (
       
       e.
       
       Temperate 
       
       < 
       
       37)
       
            {
       
       lblShow.
       
       Text 
       
       = 
       
       "高温黄色预警";
       
       lblColor.
       
       BackColor 
       
       = 
       
       Color.
       
       Yellow;
       
            }
       
       else 
       
       if (
       
       e.
       
       Temperate 
       
       < 
       
       40)
       
            {
       
       lblShow.
       
       Text 
       
       = 
       
       "高温橙色预警";
       
       lblColor.
       
       BackColor 
       
       = 
       
       Color.
       
       Orange;
       
            }
       
       else 
       
       if (
       
       e.
       
       Temperate 
       
       < 
       
       37)
       
            {
       
       lblShow.
       
       Text 
       
       = 
       
       "高温红色预警";
       
       lblColor.
       
       BackColor 
       
       = 
       
       Color.
       
       Red;
       
            }
       
        }
       
    }
       
}
       
       //第一步 Define events information class
       
       class 
       
       TemperatureEventArgs : 
       
       EventArgs
       
    {
       
       private 
       
       int 
       
       temperature;
       
       //TemperatureEventArgs是一个类
       
       public 
       
       TemperatureEventArgs(
       
       int 
       
       temperature)
       
       //声明构造函数
       
        {
       
       this.
       
       temperature 
       
       = 
       
       temperature;
       
        }
       
       public 
       
       int 
       
       Temperate
       
       //定义只读属性
       
        {
       
       //专门定义一个Temperature方法来返回数据
       
       get
       
            {
       
       return 
       
       temperature;
       
            }
       
        }
       
    }
       
       //第二步：Define the event alarm
       
       class 
       
       TemperatureWaring
       
    {
       
       //1.声明委托类型
       
       public 
       
       delegate 
       
       void 
       
       TemperatureHandler(
       
       object 
       
       sender, 
       
       TemperatureEventArgs 
       
       e);
       
       //2.Temperature warning statement event
       
       public 
       
       event 
       
       TemperatureHandler 
       
       OnWarning;
       
       //3.Starting to monitor the temperature,同时发布事件
       
       public 
       
       void 
       
       Monitor(
       
       int 
       
       tp)
       
        {
       
       TemperatureEventArgs 
       
       e 
       
       = 
       
       new 
       
       TemperatureEventArgs(
       
       tp);
       
       if (
       
       OnWarning 
       
       != 
       
       null)
       
            {
       
       OnWarning(
       
       this, 
       
       e);
       
            }
       
        }
       
    }
      
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