如何在富文本框中保存和恢复光标线poistion [英] how to save and restore the cursor line poistion in rich textbox

问题描述

嗨



如何在richtextbox中保存和恢复光标线和位置。



i放置win形式的richtextbox和ai放置一个包含行号的标签。如果我们保存位置并滚动，如果我们想恢复，我们需要滚动到原始位置。



谢谢

GSS

Hi

How to save and restore the cursor line and position in richtextbox.

i placed a richtextbox in win form and a i placed a label which contains line number. if we save a position and scroll if we want to restore we need to scroll to the original position.

Thanks
GSS

推荐答案

以下是一些以您描述的方式导航的基本方法。您可以增加位置变量的范围，甚至可以将其保存为用户设置，以便编辑器可以恢复到用户重新启动程序时的位置。

Here are some basic methods to navigate in the manner that you describe. You can increase the scope of the position variable or even save it as a user setting so that the editor can resume to the position when the user restarts the program.

// Get the position
private void richTextBox1_TextChanged(object sender, EventArgs e)
{
    // Capture position    
    Point curPos = Cursor.Position;
    // Place position in textbox
    textBox1.Text  = richTextBox1.GetCharIndexFromPosition(curPos).ToString();
}

// Set and scroll to the position
private void button1_Click(object sender, EventArgs e)
{
    // Subtract 1 from stored position to restore to original position.
    richTextBox1.SelectionStart = int.Parse(textBox1.Text) - 1; 
    richTextBox1.SelectionLength = 0;
    // Scroll to position
    richTextBox1.ScrollToCaret();
    // Return focus to RTB
    richTextBox1.Focus();
}

祝你好运。

Good luck.

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