- 获得光标所在的行号
- 获得光标所在的列号
- 设置光标到指定行号
- 设置光标到指定列号
http://www.huifangseo.com/blog/6/7.html
获得光标所在的行号和列号
方法1
int SelStart = richTextBox1.SelectionStart;
int Line = + richTextBox1.GetLineFromCharIndex(SelStart); //行值
int Column = + SelStart - (richTextBox1.GetFirstCharIndexFromLine(Line - ));//列值
Text = string.Format("行{0} 列{1}", Line, Column);
方法2
using System.Runtime.InteropServices; private int EM_LINEINDEX = 0x00BB;
private int EM_LINEFROMCHAR = 0x00C9; [DllImport("user32.dll", EntryPoint = "SendMessage")]
public static extern int SendMessage(IntPtr hwnd, int wMsg, int wParam, int lParam); public Point GetCaretPosition(TextBoxBase editControl)
{
int charIndex = (int)SendMessage(editControl.Handle, EM_LINEINDEX, -, );//行值
int lineIndex = (int)SendMessage(editControl.Handle, EM_LINEFROMCHAR, charIndex, );//列值
return new Point(editControl.SelectionStart - charIndex, lineIndex);
}
private void button2_Click(object sender, EventArgs e)
{
Point pt = GetCaretPosition(richTextBox1);
Text = string.Format("行{0} 列{1}", pt.X + , pt.Y+);
}
http://bbs.csdn.net/topics/360049737
设置光标到指定行号
方法1 GetFirstCharIndexFromLine
//转到第三行
int Line = ;
richTextBox1.SelectionStart = richTextBox1.GetFirstCharIndexFromLine(Line - );
richTextBox1.SelectionLength = ;
richTextBox1.ScrollToCaret();
richTextBox1.Focus();
方法2 SendMessage
//转到第3行
int Line = ;
richTextBox1.SelectionStart = SendMessage(richTextBox1.Handle, EM_LINEINDEX, Line - , );
richTextBox1.SelectionLength = ;
richTextBox1.ScrollToCaret();
richTextBox1.Focus();
设置光标到指定列号
先转到指定行号，然后 加上当前光标的列号 richTextBox1.SelectionStart
private void jumpColumn(int Column)
{
int Line = Column; int charIndex = (int)SendMessage(richTextBox1.Handle, EM_LINEINDEX, Line - , );
int lineIndex = charIndex + (int)SendMessage(richTextBox1.Handle, EM_LINEFROMCHAR, charIndex, ); richTextBox1.SelectionStart = lineIndex;
}
private void button4_Click(object sender, EventArgs e)
{
//转到第5行 第5列
richTextBox1.Focus();
jumpColumn();
}