将 PropertyDescriptor 转换为 List<Tuple<string, string>>

debugcn 发表于 Dev

瑟万·阿菲菲

我有以下课程：

public class Cmp
{
    public List<Tuple<string, string>> Hdd { get; set; }
    public string Cpu { get; set; }
    public string MonitorModel { get; set; }
    public List<Tuple<string, string>> OpticDriver { get; set; }
}

我也使用此代码转换List<Cmp>为 CSV：

public static void WriteToCsv<T>(IEnumerable<T> data)
{
    var strBuilder = new StringBuilder();
    PropertyDescriptorCollection props = TypeDescriptor.GetProperties(typeof(T));
    foreach (PropertyDescriptor prop in props)
    {
        strBuilder.Append(prop.DisplayName); // header
        strBuilder.Append(",");
    }
    strBuilder.AppendLine();
    foreach (T item in data)
    {
        foreach (PropertyDescriptor prop in props)
        {
            strBuilder.Append(prop.Converter.ConvertToString(
                prop.GetValue(item)));
            strBuilder.Append(",");
        }
        strBuilder.AppendLine();
    }

    File.WriteAllText(@"C:\list.csv", strBuilder.ToString());
}

只是想知道如何迭代Hdd和OpticDriver里面的属性WriteToCsv<T>。目前的结果是这样的：

 Hdd            Cpu     MonitorModel    OpticDriver
(Collection)    CPU1    Monitor1        (Collection)
(Collection)    CPU2    Monitor2        (Collection)
(Collection)    CPU3    Monitor3        (Collection)

我希望它是这样的：

 Hdd            Cpu     MonitorModel    OpticDriver
Hdd1-Hdd2       CPU1    Monitor1        Disk1-Disk2
Hdd1-Hdd2       CPU2    Monitor2        Disk1-Disk2
Hdd1-Hdd2       CPU3    Monitor3        Disk1-Disk2

马里乌什·贾姆罗

解决方案1

将值转换为List<Tuple<string,string>>与其他属性不同的处理方式

foreach (PropertyDescriptor prop in props)
{
    var value = prop.GetValue(item);
    if(value is List<Tuple<string, string>> tupleList)
    {
        string tupleString = ConvertTupleListToString(tupleList);
        strBuilder.Append(tupleString);
    }
    else
    {
        strBuilder.Append(prop.Converter.ConvertToString(value));
    }
    strBuilder.Append(",");
}

解决方案2

与其使用泛型，不如List<Tuple<string,string>>考虑使用您自己的类似 List 的类型和自定义ToString()实现，这将返回您想要的任何内容。

public class HddInfoList : List<Tuple<string, string>>
{
    public HddInfoList(IEnumerable<Tuple<string, string>> collection) : base(collection)
    {

    }

    public override string ToString()
    {
        //For example return first items of tuple separated by '-'
        return string.Join("-", this.Select(m => m.Item1));
    }
}

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