使用传递Tuple的Generic方法写入CSV

Question

我正在尝试创建一个通用方法，该方法将接收列表<T>和列表<Tuple<string,string, int>>，以便我可以写出CSV。我希望该方法能够接收传递给它的任何单个级别的列表<object>，并使用包含正确的列名称和列应该出现的顺序的元组列表，但是，我从来没有以这种方式与元组合作，所以我不确定如何使订单部分与元组一起工作。

到目前为止，我有这个：

protected List<Tuple<string, string, int>> CreateColumnOrder()
{
     var columns = new List<Tuple<string, strint, int>>();
     columns.Add(Tuple.Create("OriginalColumnName", "New Column Name", 0);
     columns.Add(Tuple.Create("OriginalColumnName", "New Column Name", 2);
     columns.Add(Tuple.Create("OriginalColumnName", "New Column Name", 1);
     return columns;
}

public FileInfo GenericCsvFile<T>(List<T> list, List<Tuple<string, string, int>> columns)
{
    if(list != null)
    {
        //File logic here...

        StringBuilder sb = new StringBuilder();

        bool IsFirstRow = true;
        int rowCounter = 1;

        //Re-order the columns here before they get written out...

        foreach (T item in list)
        {
            PropertyInfo[] propInfo = item.GetType().GetProperties();

            while (isFirstRow)
            {
                sb.Append(WriteColumnName(columns));
                isFirstRow = false;
            }

            foreach (PropertyInfo info in propInfo)
            {
                object value = info.GetValue(item, null);
                sb.Append("\"").Append(value).Replace("\"", "''").Append("\"");
                rowCounter++;

                if (rowCounter == list.Count)
                {
                    sb.Append(Environment.NewLine);
                    using (var sw = file.AppendText())
                    {
                         sw.Write(sb.ToString());
                         sw.Close();
                         sw.Dispose();
                     }
                 }
                 else
                     sb.Append(Delimiter);
                }
            }
        }
        return file;
    }
}

protected StringBuilder WriteColumnName(List<Tuple<string, string, int>> columns)
{
    StringBuilder sb = new StringBuilder();

    //Same here, how to use the Tuple order to write the column names...

    foreach(var c in columns)
        sb.Append("\"").Append(c.Item2).Replace("\"", "''").Append("\"");

    return sb;
}

更新： 我正在为我的特定问题发布解决方案，特别归功于@ cloud120，帮助我对元组进行排序。

public FileInfo GenericCsvFile<T>(List<T> list, List<Tuple<string, string, int>> columns)
{
    if(list != null)
    {
        //File logic here...

        StringBuilder sb = new StringBuilder();

        bool IsFirstRow = true;
        int rowCounter = 0;

       if(columns != null)
           columns.Sort((a,b) => a.Item3.CompareTo(b.Item3));

        //moved this here to avoid reflection every time the loop was processed
        PropertyInfo[] propInfo = item.GetType().GetProperties();
        int count = propInfo.Length;

        foreach (T item in list)
        {
            if(isFirstRow)
            {
                sb.Append(WriteColumnName(columns));
                sb.Append(Environment.NewLine);
                isFirstRow = false;
            }

            int infoCount = 0;
            foreach (var column in columns)
            {
                var value = item.GetType().GetProperty(column.Item1).GetValue(item,null);
                sb.Append(value);
                infoCount++;
                rowCounter++;

                if (rowCounter == list.Count)
                {
                    sb.Append(Environment.NewLine);
                    using (var sw = file.AppendText())
                    {
                         sw.Write(sb.ToString());
                         sw.Close();
                         sw.Dispose();
                     }
                 }
                 else
                     sb.Append(infoCount == count ? Environment.NewLine : ",";
                }
            }
        }
        return file;
    }
}

protected StringBuilder WriteColumnName(List<Tuple<string, string, int>> columns)
{
    StringBuilder sb = new StringBuilder();

    foreach(var c in columns)
        sb.Append(c.Item2).Append(",");

    return sb;
}