C# WPF 之 遍历子控件

 /// <summary>
        /// 检查非空字段
        /// </summary>
        /// <param name="IsOk"></param>
        /// <param name="textboxes"></param>
        private void CheckTextBoxNotNull(ref bool IsOk, params TextBox[] textboxes)
        {
            foreach (TextBox txtBox in textboxes)
            {
                txtBox.Background = Brushes.White;
                if (txtBox.Text.Length <= 0)
                {
                    IsOk = false;
                    txtBox.Background = Brushes.Red;
                }
                else
                {
                    txtBox.Background = null;
                }
            }
        }

/// <summary>
        /// 设置控件
        /// </summary>
        /// <param name="IsEn"></param>
        /// <param name="IsNull"></param>
        private void SetControl(bool IsEn ,bool IsNull)
        {
            foreach (UIElement c in grd_UserInfo.Children)
            {
                if (c is TextBox)
                {
                    c.IsEnabled = IsEn;
                    if (IsNull)
                    {
                        ((TextBox)c).Text = "";
                    }
                }
                if (c is ComboBox)
                {
                    c.IsEnabled = IsEn;
                    if (IsNull)
                    {
                        ((ComboBox)c).SelectedIndex = -1;
                    }
                }
                if (c is DatePicker)
                {
                    c.IsEnabled = IsEn;
                    if (IsNull)
                    {
                        ((DatePicker)c).SelectedDate = null;
                    }
                }
            }
            btn_ChoosePhoto.IsEnabled = IsEn;
        }

/// <summary>
        /// 验证邮箱输入是否合法
        /// </summary>
        /// <param name="strIn"></param>
        /// <returns></returns>
        private bool IsValidEmail(string strIn)
        {
            return Regex.IsMatch(strIn, @"^([w-.]+)@(([[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}.)|(([w-]+.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(]?)$");
        }