找到文本框光标位置，行号。和列号。在asp.net

Question

我是一个Web应用程序开发的初学者。我有一个Windows应用程序的代码。同样的功能，我必须转换成一个Web应用程序。我有一个文本框控件。我正在将一些文本加载到该文本框中。我想找到当前的光标位置，行号和列号。对于Windows应用程序的代码如下：

private void Form1_Load(object sender, EventArgs e) 
    { 
     textBox1.Text = @"This is a demo for text box control 
         I am trying to find the cursor position , 
         line no and column no 
         of the cursor.";   


    } 

    private void textBox1_Click(object sender, EventArgs e) 
    { 
     textBox1.SelectionStart++; 
     label2.Text = textBox1.SelectionStart.ToString(); 
     int i = textBox1.GetLineFromCharIndex(textBox1.SelectionStart); 
     label3.Text = i.ToString(); 
     int j =textBox1.SelectionStart - textBox1. GetFirstCharIndexFromLine(i); 
     label4.Text = j.ToString(); 
    } 

    private void textBox1_KeyDown(object sender, KeyEventArgs e) 
    { 
     if ((e.KeyCode == Keys.Up) || (e.KeyCode == Keys.Right) || 
      (e.KeyCode == Keys.Left) || (e.KeyCode == Keys.Down)) 
     { 
      textBox1.SelectionStart++; 
      label2.Text = textBox1.SelectionStart.ToString(); 
      int i = textBox1.GetLineFromCharIndex(textBox1.SelectionStart); 
      label3.Text = i.ToString(); 
      int j = textBox1.SelectionStart - 
        textBox1.GetFirstCharIndexFromLine(i); 
      label4.Text = j.ToString(); 
     } 
    } 

Answer 1

在本post接受的答案，你必须使用JavaScript来让你的客户为例侧SelectionStart和选定结束。然后，发布结果（可以使用隐藏的输入值）与数据的复位服务器：

How to get selected text from textbox control with javascript