Question

我有一个短语输入到与此类似的文本框中：“明天天气里有什么天气”

目前，此代码将郊区字符串设置为大写名称，并将 suburbID 设置为值。

public void requestedSuburb(String suburbFromForm1)
{
    suburb = suburbFromForm1;

    if (suburb.Contains("taree"))
    {
       suburb = "Taree";
       suburbID = "zmw:00000.1.95784.xml";
    }
    else if (suburb.Contains("port macquarie"))
    {
       suburb = "Port Macquarie";
       suburbID = "zmw:00000.1.94787.xml";
    }

（在此点之下，使用 else if 语句检查更多郊区名称。

将整个InputTextbox.Text传递到郊区字符串以检查上述内容。

我的问题是，是否有 else if 语句可以检查郊区字符串，如果没有找到郊区文本，它可以默认选择？（即：我希望'Taree'成为默认设置。）

我现在拥有的是这个，但它没有返回任何东西：

else if (!suburb.Contains("taree") || (!suburb.Contains("port macquarie")))
{
   suburb = "Port Macquarie"
   suburbID = "zmw:00000.1.94787.xml";
}

Answer 1

您只需在所有else的末尾else-if，就像这样：

if (suburb.Contains("taree"))
{
   suburb = "Taree";
   suburbID = "zmw:00000.1.95784.xml";
}
else if (suburb.Contains("port macquarie"))
{
   suburb = "Port Macquarie";
   suburbID = "zmw:00000.1.94787.xml";
}
else {
  suburb = "default";
}

Answer 2

您只想要else：

if (suburb.Contains("taree"))
{
   suburb = "Taree";
   suburbID = "zmw:00000.1.95784.xml";
}
else if (suburb.Contains("port macquarie"))
{
   suburb = "Port Macquarie";
   suburbID = "zmw:00000.1.94787.xml";
}
else
{
    // this fires if nothing else above is correct
    suburb = "Taree";
    suburbID = "zmw:00000.1.95784.xml";
}

Answer 3

使用else处理默认设置，如下所示：

if (suburb.Contains("taree"))
{ 
    suburb = "Taree";
    suburbID = "zmw:00000.1.95784.xml";
}
else if (suburb.Contains("port macquarie"))
{
    suburb = "Port Macquarie";
    suburbID = "zmw:00000.1.94787.xml";
}
else
{
    suburb = "Taree";
    suburbID = "zmw:00000.1.95784.xml";
}

您也可以将默认设置指定为开头，然后仅在找到匹配项时覆盖默认值，如下所示：

// Default values
suburb = "Taree";
suburbID = "zmw:00000.1.95784.xml";

if (suburb.Contains("port macquarie")
{
    suburb = "Port Macquarie";
    suburbID = "zmw:00000.1.94787.xml";
}

注意：对于您发布的示例代码，这会将您的逻辑简化为单个if。这也消除了第一个if和else中的重复逻辑。

C＃字符串不包含文本

3 个答案: