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C#短消息提示窗口位置及窗口大小详解

目录
  • 一 短消息提示
  • 二 弹出窗口
  • 三 窗口位置
    • 1 要点与细节
  • 四 窗口大小
    • 总结

      一 短消息提示

      短消息提示Toast:

      用于呈现一条短消息,提示完成后即可自动消失;

      特点:

      ① 弹出式窗口;

      ② 短文本,可以折行显示;

      ③ 根据文本长度,自动调整大小;

      ④ 约1.5后,自动消失;

      二 弹出窗口

      在Winform中,所有的窗口都用Form实现,比如:

      ① 常规窗口Window;

      ② 对话框窗口Dialog;

      ③ 悬浮窗口FloatWindow;

      ④ 工具提示Tooltip;

      ⑤ 弹出式窗口Popup(如菜单窗口、下拉列表窗口);

      自定义一个Form类,即可定义一个窗口

      public class myToast:Form
      {
      
      }
      

      本窗口不需要边框,位置和大小都是自己控制的。

      创建并显示窗口

      myToast toast=new myToast();
      toast.ShowMessage("This is a totas!");
      

      子窗体代码

      using System;
      using System.Collections.Generic;
      using System.ComponentModel;
      using System.Data;
      using System.Drawing;
      using System.Drawing.Drawing2D;
      using System.Drawing.Text;
      using System.Linq;
      using System.Runtime.InteropServices;
      using System.Text;
      using System.Threading.Tasks;
      using System.Windows.Forms;
      
      namespace 弹窗提示
      {
          public partial class Toast : Form
          {
              private string message;
              public Toast()
              {
            www.devze.com      //无边框
                  this.FormBorderStyle = FormBorderStyle.None;
                  //背景白色
                  this.BackColor = Color.White;
              }
      
              public void ShowMessage(string message)
              {
                  this.message = message;
      
                  //手动指定位置
                  this.StartPosition = FormStartPosition.Manual;
                  this.Location = new Point(0, 0);
                  this.Size = new Size(300, 100);
      
                  //显示窗口
                  this.Show();
              }
      
              protected override void OnPaint(PaintEventArgs e)
              {
                  base.OnPaint(e);
      
                  Graphics g = e.Graphics;
                  int w = this.Width, h = this.Height;
                  Rectangle rect = new Rectangle(0, 0, w, h);
                  rect.Inflate(-4, -4);
      
                  //平滑绘制,反锯齿
                  g.SmoothingMode = SmoothingMode.HighQuality;
                  g.TextRenderingHint = TextRenderingHint.AntiAliasGridFit;
      
                  if(message!=null)
                  {
                      StringFormat sf = new StringFormat();
                      sf.Alignment = StringAlignment.Center;
                      sf.LineAlignment = StringAlignment.Center;
      
                      Brushjavascript brush = new SolidBrush(Color.Black);
                      g.DrawString(message, this.Font, brush, rect, sf);
                      brush.Dispose();
                  }
              }
          }
      }

      父窗体代码

      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 弹窗提示
      {
          public partial class Form1 : Form
          {
              public Form1()
              {
                  InitializeComponent();
              }
      
              private void button1_Click(object sender, EventArgs e)
              {
                  Toast toast = new Toast();
                  toast.ShowMessage("This is a toast!");
              }
          }
      }

      三 窗口位置

      toast窗口显示时,相当于主窗口位置居中。

      ① 找到主窗口,得到主窗口的位置;

      ② 计算toast窗口的位置;

      toast窗口显示www.devze.com时,不剥夺主窗口的焦点,需要重写ShowWithoutActivation

      protected override bool ShowWithoutActivation
      {
         get
         {
            return true;
         }
      }
      

      1 要点与细节

      ① 已知一个控件Control,可以得到它所在的窗口;

      Form form=ctrl.FindForm();
      

      子窗体代码:

      using System;
      using System.Collections.Generic;
      using System.ComponentModel;
      using System.Data;
      using System.Drawing;
      using System.Drawing.Drawing2D;
      using System.Drawing.Text;
      using System.Linq;
      using System.Text;
      using System.Threading.Tasks;
      using System.Windows.Forms;
      
      namespace 窗口位置
      {
          public partial class Toast : Form
          {
              private string message;
              public Toast()
              {
                  this.FormBorderStyle = FormBorderStyle.None;
                  thispython.BackColor = Color.White;
                  this.ShowInTaskbandroidar = false;
              }
              //owner 可以是子窗口也可以是控件
              public void ShowMessage(Control owner,string message)
              {
                  this.message = message;
      
                  this.StartPosition = FormStartPosition.Manual;
                  this.Size = new Size(300, 100);
      
                  //找到owner所在的顶级窗口
                  Form form = owner.FindForm();
                  this.Owner = form;
      
                  //使toast窗口相对主窗口居中
                  Rectangle fr = new Rectangle(form.Location, form.Size);
                  int x = fr.X + (fr.Width - this.Width) / 2;
                  int y = fr.Y + (fr.Width - this.Height) / 2;
                  this.Location = new Point(x, y);
      
                  this.Show();
              }
      
              //焦点控制:本窗口不剥夺主窗口的焦点
              //否则,当toast窗口激活时,主窗口焦点被剥夺
              protected override bool ShowWithoutActivation
              {
                  get { return true; }
              }
      
              protected override void OnPaint(PaintEventArgs e)
              {
                  base.OnPaint(e);
      
                  Graphics g = e.Graphics;
                  int w = this.Width, h = this.Height;
                  Rectangle rect = new Rectangle(0, 0, w, h);
                  rect.Inflate(-4, -4);
      
                  //平滑绘制,反锯齿
                  g.SmoothingMode = SmoothingMode.HighQuality;
                  g.TextRenderingHint = TextRenderingHint.AntiAliasGridFit;
      
                  if(message!=null)
                  {
                      StringFormat sf = new StringFormat();
                      sf.Alignment = StringAlignment.Center;
                      sf.LineAlignment = StringAlignment.Center;
      
                      Brush brush = new SolidBrush(Color.Black);
                      g.DrawString(message, this.Font, brush, rect, sf);
                      brush.Dispose();
                  }
              }
          }
      }

      父窗体代码

      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;
      
      n开发者_C培训amespace 窗口位置
      {
          public partial class Form1 : Form
          {
              public Form1()
              {
                  InitializeComponent();
              }
      
              private void button1_Click(object sender, EventArgs e)
              {
                  Toast toast = new Toast();
                  toast.ShowMessage(button1, "中国人民解放军!");
              }
          }
      }

      四 窗口大小

      Toast的窗口的大小,应该根据消息长度来调整,比如:

      toast.ShowMessage(button1,"成功");
      toast.ShowMessage(button1,"思密达");
      toast.ShowMessage(button1,"编程是一种艺术");
      

      使用Graphics.MeasureString()可以测算文本的尺寸

      Graphics g=this.CreateGraphics();
      SizeF size=g.MeasureString(str,this.Font,300);
      g.Dispose();
      

      注意,临时创建的Graphics用完之后需要手工销毁。

      总结

      到此这篇关于C#短消息提示窗口位置及窗口大小的文章就介绍到这了,更多相关C#短消息提示窗口位置内容请搜索我们以前的文章或继续浏览下面的相关文章希望大家以后多多支持我们!

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