/// <summary>
/// 用户名输入框的焦点失去事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void text_manager_username_Leave(object sender, EventArgs e)
{
if (text_manager_username.Text != "")
{
if (mb.FindUserName(text_manager_username.Text).Count == 0)
{
lab_prompt.Text = "该用户名可以使用";
lab_prompt.ForeColor = Color.Green;
}
else
{
lab_prompt.Text = "该用户名已被使用";
lab_prompt.ForeColor = Color.Red;
}
}
}