C learning notes

Catalog

Change the window size

Get window size

Get button location

Randomly update label position

checkBox Use

radiobutton Use

SerialPort Use

PictureBox Use

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Change the window size

// adopt button1_click Click Change 
private void button1_Click(object sender, EventArgs e)
{
    //this.ClientSize = new System.Drawing.Size(300, 400);
    //this.ClientSize = new Size(300, 400);// User area size 
    this.Size = new Size(300, 400);// The whole window size 
    this.button1.Size = new System.Drawing.Size(160, 150);//button1 size 
}

Get window size

private void button1_Click(object sender, EventArgs e)
{
    int w = this.Size.Width; 
    int h = this.Size.Height;
    MessageBox.Show(" wide :" + w + "  high :" + h);
}

Get button location

private void button1_Click(object sender, EventArgs e)
{
    //int loc_x = this.button1.Location.X; // It can also be obtained in advance 
    //int loc_y = this.button1.Location.Y;

    this.button1.Location = new Point(150,50);// Specify the button position 
    MessageBox.Show("Button1_X:"+ button1.Location.X + " Button1_Y:"+ button1.Location.Y);            
}

Randomly update label position

private void label1_Click(object sender, EventArgs e)
{            
    Random random = new Random();   
    int n =random.Next(0,300); // Random range 0-300
    this.label1.Location = new Point(n,n);// Randomly assigned location 
}

checkBox Use

private void button1_Click(object sender, EventArgs e)
{
    String str = " You bought :";
    int sum = 0;
    if (this.checkBox1.Checked == true)
    {
        str = str + " Apple ";
        sum += 3;
    }
    if (this.checkBox2.Checked == true)
    {
        str = str + ", pitaya ";
        sum += 5;
    }
    if (this.checkBox3.Checked == true)
    {
        str = str + ", watermelon ";
        sum += 10;
    }
    MessageBox.Show(str + sum + " element ");
}

radiobutton Use

private void button2_Click(object sender, EventArgs e)
{
    if (this.radioButton1.Checked == true)
        Console.WriteLine(" male ");
    else
        Console.WriteLine(" Woman ");
}

ComboBox Use

private void button1_Click(object sender, EventArgs e)
{
    String str = this.comboBox1.SelectedItem.ToString();
    Console.WriteLine(str);// Output the contents of the selected item 

    int a = this.comboBox1.SelectedIndex;
    MessageBox.Show(this.comboBox1.Items[a].ToString());// Output the contents of the selected item 
}

 

 

SerialPort Use

send data

private void button1_Click(object sender, EventArgs e)
{
    //  send data 
    if(serialPort1.IsOpen == true)// Check if the port is open 
    {
        String str = textBox1.Text; // Send the text content to the serial port 
        serialPort1.WriteLine(str);
    }                
}

receive data

//  When the serial port receives the data content , This event triggers and executes the following method 
//  This method is run by another sub thread of the system 
private void serialPort1_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
{
    String str = serialPort1.ReadLine(); // Read each row of data 
    serialPort1.DiscardInBuffer();//  Get the data and clear the cache             
    textBox2.Text = str + textBox2.Text;
}

 

Specific serial communication articles ：https://blog.csdn.net/m0_65592409/article/details/125213063?spm=1001.2014.3001.5501

PictureBox Use

Add image resources

  Import image

 

private int a = 0;
// Click on button Switch pictures 
private void button1_Click(object sender, EventArgs e)
{
    if(a == 0)
    {
        this.pictureBox1.Image = global::WinForms_image.Properties.Resources.p2;
        a = 1;
    }
    else if(a == 1)
    {
        this.pictureBox1.Image = global::WinForms_image.Properties.Resources.p3;
        a=2;
    }
    else if(a ==2)
    {
        this.pictureBox1.Image = global::WinForms_image.Properties.Resources.p1;
        a = 0;
    }
                
}