各位大侠好,
初学C#,编个程序打算在窗口加载时,画一个方块,代码如下。
可调试时,为什么显示不出方块?
求高手指点!!在线等~ public partial class test : Form
{
public test()
{
InitializeComponent();
}
SolidBrush blkBrush = new SolidBrush(Color.Black); private void test_Load(object sender, EventArgs e)
{
this.CreateGraphics().FillRectangle(blkBrush, new Rectangle(300, 200, 40, 40));
}
}
初学C#,编个程序打算在窗口加载时,画一个方块,代码如下。
可调试时,为什么显示不出方块?
求高手指点!!在线等~ public partial class test : Form
{
public test()
{
InitializeComponent();
}
SolidBrush blkBrush = new SolidBrush(Color.Black); private void test_Load(object sender, EventArgs e)
{
this.CreateGraphics().FillRectangle(blkBrush, new Rectangle(300, 200, 40, 40));
}
}
那请问能不能在鼠标点击事件中调用paint事件呢?
比如在
private void btnStart_MouseClick(object sender, MouseEventArgs e)
中调用
private void test_Paint(object sender, PaintEventArgs e)
?我想实现在点击一个按钮后,也出现图形
{
test_Paint(this, new PaintEventArgs());
}
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;namespace WinAppSideBar
{
public partial class FrmBrush : Form
{
public FrmBrush()
{
InitializeComponent();
} private void btnLine_Click(object sender, EventArgs e)
{
Graphics g = this.CreateGraphics();
Pen pen = new Pen(Color.Red, 2);
g.Clear(this.BackColor);
g.DrawLine(pen, 10, 10, 10, 20);
}
private void btnArc_Click(object sender, EventArgs e)
{
Graphics g = this.CreateGraphics();
Pen pen = new Pen(Color.Red, 2);
g.Clear(this.BackColor);
g.DrawArc(pen, 10, 10, 200, 100, 60, 90);
} private void btnRect_Click(object sender, EventArgs e)
{
Graphics g = this.CreateGraphics();
Pen pen = new Pen(Color.Red, 2);
g.Clear(this.BackColor);
g.DrawRectangle(pen, 10, 10, 200, 100);
} //画弧
//public void DrawArc(Pen pen, int x, int y, int width, int height, int startAngle, int sweepAgngle);
//pen :Pen
//x :外接矩形左上角 x 的坐标
//y :外接矩形左上角 y 的坐标
//width :外接矩形宽
//height:外接矩形高
//startAngle:开始角度(以度为单位)
//sweepAngle;延伸角度(以度为单位) //画直线
//public void DrawLine(Pen pen, int x1, int y1, int x2, int y2);
//pen :Pen
//x1 :起点x 的坐标
//y1 :起点y 的坐标
//x2 :终点x 的坐标
//y2 :终点y 的坐标 //public void DrawRectangle(Pen pen, int x, int y, int width, int height);
//pen :Pen
//x :矩形左上角 x 的坐标
//y :矩形左上角 y 的坐标
//width :矩形宽
//height:矩形高
}
}