Question

我正在尝试从foreach＆＃34; hostedId＆＃34;中返回该数据。有人可以帮忙吗？

public static string GetHostedRecordSet()
{
    var request = new ListHostedZonesRequest()
    {
        MaxItems = "1"
    };

    var list = client.ListHostedZones(request);

    foreach (var hostedId in list.HostedZones)
    {
        Console.WriteLine("\n Hosted ID is:");
        Console.Write(hostedId.Id);
    }

    return hostedId;
}

Answer 1

这取决于。如果要返回第一个元素：

return list.HostedZones.First().Id; // Not in a loop!

如果要返回多个项目，请更改方法的签名：

public static IEnumerable<string> GetHostedRecordSet()
{
    var request = new ListHostedZonesRequest()
    {
        MaxItems = "1"
    };

    var list = client.ListHostedZones(request);
    return list.HostedZones
        .Select(z => z.Id);
}

Answer 2

如果要将所有值作为单个字符串返回，可以将它们与分隔符连接起来，例如','：

public static string GetHostedRecordSet()
{
    var request = new ListHostedZonesRequest()
    {
        MaxItems = "1"
    };

    var list = client.ListHostedZones(request);

    StringBuilder result = new StringBuilder();
    foreach (var hostedId in list.HostedZones)
    {
        result.Append(hostedId.Id).Append(",");
    }

    return result.ToString(0, Math.Max(0, result.Length - 1);
}

从foreach数据返回数据

2 个答案: