C# Resize textbox to fit content

Question

I\'m writing a program where the user should be able to write text in a textbox. I\'d like the textbox to resize itself, so it fit the content. I\'ve tried the following:

Answer 1

Your binding to the wrong event, and you cannot use the graphics object in the TextChangedEventArgs object.

Try using the TextChanged event. The following snippet is working:

public Form1()
{
    InitializeComponent();

    this.textBox1.TextChanged += new EventHandler(textBox1_TextChanged);
}

void textBox1_TextChanged(object sender, EventArgs e)
{
    System.Drawing.SizeF mySize = new System.Drawing.SizeF();

    // Use the textbox font
    System.Drawing.Font myFont = textBox1.Font;

    using (Graphics g = this.CreateGraphics())
    {
        // Get the size given the string and the font
        mySize = g.MeasureString(textBox1.Text, myFont);
    }

    // Resize the textbox 
    this.textBox1.Width = (int)Math.Round(mySize.Width, 0);
}

}