Question

C# Form 滚动(scroll)问题

我的C# Win Form里面有一个richtextbox, 当焦点在这个richtextbox的时候，我想要用户滚动滚轮可以卷动这个Form。请问怎么做？

Answer 1

public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
this.richTextBox1.MouseWheel += new MouseEventHandler(richTextBox1_MouseWheel);
}

void richTextBox1_MouseWheel(object sender, MouseEventArgs e)
{
this.Location = new System.Drawing.Point(this.Location.X, this.Location.Y + e.Delta);
}

}
以上是上下卷动，要想左右卷动，可修改为以下代码：
new System.Drawing.Point(this.Location.X + e.Delta, this.Location.Y);

Answer 2

public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
this.richTextBox1.MouseWheel += new System.Windows.Forms.MouseEventHandler(this.richTextBox1_MouseWheel);

}
private void richTextBox1_MouseWheel(object sender, System.Windows.Forms.MouseEventArgs e)
{
int numberOfTextLinesToMove = e.Delta * SystemInformation.MouseWheelScrollLines / 120;
int numberOfPixelsToMove = numberOfTextLinesToMove * fontSize;

if (numberOfPixelsToMove != 0) {
System.Drawing.Drawing2D.Matrix translateMatrix = new System.Drawing.Drawing2D.Matrix();
translateMatrix.Translate(0, numberOfPixelsToMove);
mousePath.Transform(translateMatrix);
}
richTextBox1.Invalidate();
}
}