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C# WinForm自定义控件

一、开发环境和工具

1、WIN10系统

2、Visual Studio社区版 2019（C#）

二、创建自定义控件窗体

① 添加一个自定义控件，右键解决方案，点击添加，然后点击用户控件

②选择用户控件（Windows窗体）

③得到如下图所示控件

④从左侧工具箱拖曳控件并布局，如下图所示

⑤查看工具箱就能够看见我们的自定义控件已经在工具箱生成了

三、添加相应函数

①设置名称

public void SetName(string Name){      this.lab_Name.Text = Name;      return;}

②更新测试时间

public void UpdateTimer(int Sec){      string StrHour;     	string StrMin;      string StrSec;      if ((Sec / 3600) < 10)           StrHour = "0" + (Sec / 3600).ToString();     else           StrHour=(Sec / 3600).ToString();     if (((Sec % 3600) / 60) < 10)           StrMin = "0" + ((Sec % 3600) / 60).ToString();     else          StrMin= ((Sec % 3600) / 60).ToString();       if (((Sec % 3600) % 60) < 10)          StrSec = "0" + ((Sec % 3600) % 60).ToString();     else         StrSec= ((Sec % 3600) % 60).ToString();     this.textBox_TestTimer.Text = StrHour + ":" + StrMin + ":" + StrSec;    return;}

③更新测试状态

public void UpdateTestState(bool LedRed,bool LedGreen, bool LedYellow){    if (!LedRed)        this.lab_LedRed.BackColor = System.Drawing.Color.Firebrick;    else        this.lab_LedRed.BackColor = System.Drawing.Color.Red;    if (!LedGreen)        this.lab_LedGreen.BackColor = System.Drawing.Color.ForestGreen;   else       this.lab_LedGreen.BackColor = System.Drawing.Color.Lime;   if (!LedYellow)       this.lab_LedYellow.BackColor = System.Drawing.Color.ForestGreen;   else       this.lab_LedYellow.BackColor = System.Drawing.Color.Yellow;    return;}

④设置ID

public void SetID(int IDIndex){     if(IDIndex<10)          this.lab_IDValue.Text ="00" + IDIndex.ToString();     else if(IDIndex < 100)         this.lab_IDValue.Text = "0" + IDIndex.ToString();    else if (IDIndex < 1000)        this.lab_IDValue.Text = IDIndex.ToString();      return;}

四、控件应用

using System;using System.Collections.Generic;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Windows.Forms;namespace WindowsFormsApp1{     public partial class Form1 : Form    {          public Form1()         {               InitializeComponent();         }        int Sec = 0;        UserControl2<> userControl1 = new UserControl2<1024>; //创建控件数组        private Layout layout = new Layout();                  /// <summary>      /// 更新测试时间     /// </summary>     /// <param name="count"></param>     /// <param name="Sec"></param>    private void UpdataTimer(int count,int Sec)    {         for (int i = 0; i < count; i++)        {              userControl1.UpdateTimer(Sec) ;        }    }		/// <summary>		/// 添加控件，count为添加控件数量		/// </summary>		/// <param name="count"></param>    private void AddControl(int count)   {         int PanelWidth;         int PanelHeight;         int ColCount = 0;         this.panel1.Controls.Clear();//清除面板控件         PanelWidth = this.panel1.Width;         PanelHeight = this.panel1.Height;         layout.RowGap = Convert.ToInt32(textBox_RowGap.Text);         layout.ColGap = Convert.ToInt32(textBox_ColGap.Text);         layout.LeftGap = Convert.ToInt32(textBox_LeftGap.Text);         layout.TopGap = Convert.ToInt32(textBox_TopGap.Text);         layout.Height = 134;         layout.Width =218;        //根据面板宽度，计算多少列       ColCount = (PanelWidth - layout.LeftGap - layout.RightGap) / (layout.Width + layout.ColGap);       for (int i = 0; i < count; i++)       {            userControl1 = new UserControl2(); //实例化控件           //根据列距，行距，计算控件位置            userControl1.Location = new System.Drawing.Point((i % ColCount) * (layout.Width + layout.ColGap)                                                         +layout.LeftGap,(i / ColCount) * (layout.Height + layout.RowGap) + layout.TopGap);           //更新测试状态           userControl1.UpdateTestState(true, true,true);           //设置名称           userControl1.SetName("名称" + (i + 1).ToString());           //设置ID           userControl1.SetID(i + 1);          //设置控件宽度和高度           userControl1.Width = layout.Width;           userControl1.Height = layout.Height;          //添加相应控件          this.panel1.Controls.Add(userControl1);        }       this.timer1.Start();    }          private void button1_Click_2(object sender, EventArgs e)    {       AddControl(32);    }    private void timer1_Tick(object sender, EventArgs e)   {       Sec++;       UpdataTimer(32, Sec); //更新测试时间    }  }}