有关游标的问题? [英] a question about cursor?

问题描述

从文本文件读取后，如何使光标返回到文本框的开头

代码在下面

after reading from a text file how can i make the cursor return to the beginning of text box

Code is below

private void textBox1_TextChanged(object sender, EventArgs e) 
{ 
string sql = "insert into items values('" + textBox1.Text + "')"; 
cmd = new SqlCommand(sql, con); 
 if (textBox1.Text.Length > 7) 
 { 
  textBox1.Text=textBox1.Text.Remove(0, 7); 
  if (textBox1.Text.Length == 7) 
  { 
   try 
    { 
     con.Open(); 
     cmd.ExecuteNonQuery(); 
    } 
   catch (SqlException ex) 
   { 
    MessageBox.Show(ex.ToString()); 
   } 
  con.Close(); 
  textBox1.SelectionStart = 0; 
  textBox1.ScrollToCaret(); 
 } 
}

推荐答案

尝试:

myTextBox.SelectionStart = 0;

尝试一下:

try this:

textBox1.SelectionStart = 0;
textBox1.ScrollToCaret();
this.ActiveControl = textBox1;

穆罕默德·艾哈迈德·古达(Mohammed Ahmed Gouda)写道:

Mohammed Ahmed Gouda wrote:

我如何使光标返回到文本框的开头

how can i make the cursor return to the beginning of text box

TextBox1.SelectionStart = 0;

我要从注释中的代码中说，不要更改TextChanged事件中的文本，也不要在更改之前删除处理程序.

From your code in comment, I would say, don''t change the text in TextChanged event, or remove handler before changing.

textBox1.TextChanged -= textBox1_TextChanged;
textBox1.Text=textBox1.Text.Remove(0, 7);
textBox1.TextChanged += textBox1_TextChanged;

这篇关于有关游标的问题?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！