Question

`CommService.CommServiceClient client = new CommService.CommServiceClient（）; string cardId = txtCardId.Text; string cardType = cboCardType.Text; string cardPin = txtCardPin.Text;

        if (radEnab.IsChecked == true)
        {
            string blacklist = Convert.ToString(radEnab.DataContext);
        }

        if (radDis.IsChecked == true)
        {
            string blacklist = Convert.ToString(radDis.DataContext);
        }
        if (radEnab2.IsChecked == true)
        {
            string blocked = Convert.ToString(radEnab2.DataContext);
        }

        if (radDis2.IsChecked == true)
        {
            string blocked = Convert.ToString(radDis2.DataContext);
        }

        string startDate = StartDate.Text;
        string expiryDate = ExpiryDate.Text;
        string zone = cboZone.Text;

      string data = cardId + cardType + cardPin + blacklist + blocked + startDate + expiryDate + zone;
      client.ReceiveDataFromApp("R1", "11", "161.100.100.79", "4000", data);

问题是黑名单并被阻止＆＃34;名称＆＃39;＆＃39;在当前背景下不存在＆＃34; 如何解决这个问题

Answer 1

您应该在blacklist变量可以访问的范围内声明blocked和data。在您的情况下，您声明blacklist并阻止了if变量无法访问的data范围内。

您应该这样做才能访问黑名单并屏蔽：

        string blacklist = string.Empty;
        string blocked = string.Empty;
        if (radEnab.IsChecked == true)
        {
            blacklist = Convert.ToString(radEnab.DataContext);
        }

        if (radDis.IsChecked == true)
        {
            blacklist = Convert.ToString(radDis.DataContext);
        }
        if (radEnab2.IsChecked == true)
        {
            blocked = Convert.ToString(radEnab2.DataContext);
        }

        if (radDis2.IsChecked == true)
        {
            blocked = Convert.ToString(radDis2.DataContext);
        }

        string startDate = StartDate.Text;
        string expiryDate = ExpiryDate.Text;
        string zone = cboZone.Text;

      string data = cardId + cardType + cardPin + blacklist + blocked + startDate + expiryDate + zone;
      client.ReceiveDataFromApp("R1", "11", "161.100.100.79", "4000", data);

为了更好地理解局部变量范围，请查看here

名称''在当前上下文中不存在

1 个答案: