我已经下载了List<Row> Rows
中包含的数据:
class Row
{
string[] Items { get; set; }
public Row(string[] Items)
{
this.Items = Items;
}
}
行基本上是逗号分隔条目(.csv(
using (var reader = new StreamReader(spreadSheetStream))
{
string header = reader.ReadLine(); //This is the header
Rows.Add(new Row(header.Split(',')));
while (!reader.EndOfStream)
{
string tickerInfo = reader.ReadLine(); //This is a data entry
Rows.Add(new Row(tickerInfo.Split(',')));
}
}
我像这样将List<Row>
转换为Datatable
DataTable historicalDataTable = ToDataTable<Row>(Rows);
List<Row> Rows
的第一个元素包含列的名称,其中七个。然后,此后的每个元素是实际的数据元素。
public static DataTable ToDataTable<T>(List<T> items)
{
DataTable dataTable = new DataTable(typeof(T).Name);
//Get all the properties
PropertyInfo[] Props = typeof(T).GetProperties(BindingFlags.Public | BindingFlags.Instance);
foreach (PropertyInfo prop in Props)
{
//Setting column names as Property names
dataTable.Columns.Add(prop.Name);
}
foreach (T item in items)
{
var values = new object[Props.Length];
for (int i = 0; i < Props.Length; i++)
{
//inserting property values to datatable rows
values[i] = Props[i].GetValue(item, null);
}
dataTable.Rows.Add(values);
}
//put a breakpoint here and check datatable
return dataTable;
}
当我尝试写出表的内容时,我会看到正确的行,,但是ItemArray
foreach (DataRow dataRow in historicalDataTable.Rows)
{
Console.WriteLine(dataRow.ToString());
foreach (var item in dataRow.ItemArray)
{
Console.WriteLine(item);
}
}
您的代码有点矛盾。您正在尝试将属性复制为列名,但是您的CSV代码实际上将第一行填充为列名。您没有区别标题行和数据行
您可以直接将其直接读取到具有以下内容之类的数据的数据表中
(尽管您可能想进行更好的错误检查(
var dt = new DataTable("Rows");
string data = "a,b,crn1,2,3rn4,5,6";
var stream = GenerateStreamFromString(data); // http://stackoverflow.com/questions/1879395/how-to-generate-a-stream-from-a-string
using (var reader = new StreamReader(stream))
{
reader.ReadLine()?.Split(',').ToList().ForEach(h => dt.Columns.Add(h));
while (!reader.EndOfStream)
{
dt.Rows.Add(reader.ReadLine()?.Split(',').ToArray());
}
}
foreach (DataColumn dataColumn in dt.Columns)
{
Console.Write($"{dataColumn.ColumnName} ");
}
Console.WriteLine();
foreach (DataRow dataRow in dt.Rows)
{
Console.Write("Row: ");
foreach (var item in dataRow.ItemArray)
{
Console.Write(item + " ");
}
Console.WriteLine();
}