根据输入的教工号填入后立即得出其他的信息，注意教工号txtEmployeeNumber控件后的

OnTextChanged="textChanged_Click" 后台代码：

protected void textChanged_Click(object sender, EventArgs e)        {            if (txtEmployeeNumber.Text.Trim() != "")            {                employeeBLL.GetEmployeeInfoByEmployeeNumber(txtEmployeeNumber.Text.Trim());                if (employeeBLL.GetEmployeeInfoByEmployeeNumber(txtEmployeeNumber.Text.Trim()) == null)                {                    Alert.Show("对不起，你的信息还没有填入教师信息表，请联系管理员！", MessageBoxIcon.Error);                }                else                {                    txtName.Text = employeeBLL.GetEmployeeInfoByEmployeeNumber(txtEmployeeNumber.Text.Trim()).Name;                    txtPart.Text = employeeBLL.GetEmployeeInfoByEmployeeNumber(txtEmployeeNumber.Text.Trim()).Part;                    txtIDCard.Text = employeeBLL.GetEmployeeInfoByEmployeeNumber(txtEmployeeNumber.Text.Trim()).IDcard;                    txtBirthday.Text = employeeBLL.GetEmployeeInfoByEmployeeNumber(txtEmployeeNumber.Text.Trim()).Birthday.ToString("yyyy-MM-dd");                }            }        }