从IQueryable检索逗号分隔的值并将其添加到列表

Question

IQueryable<string> ScannedBarcodes = XYZDb.tblScannedBarcodes
                                          .Where(i => i.PullNo == lblPullNo.Text)
                                          .Select(i => i.Barcode);

The result view shows something like

"678765,090909,243454,675434"

Now I want to add all the comma-separated values into a list.

Rest of my code is below:

foreach (var item in ScannedBarcodes)
{
    List<string> _barcodes = new List<string>();
    _barcodes.Add(item);
}

How to split it?

Thanks in advance

Answer 1

The splitting can be done using Linq as follows.

var _barcodes =
    ScannedBarcodes.SelectMany(iString => iString.Split(new char[]{ ','}))
                   .ToList();

Answer 2

采用

_barcodes.AddRange(item.Split(','));

Answer 3

There's no a single string with commas - that's just the debugger display . The IQueryable is a enumerable list of values already.....

IQueryable<string> ScannedBarcodes = XYZDb.tblScannedBarcodes
                                          .Where(i => i.PullNo == lblPullNo.Text)
                                          .Select(i => i.Barcode);

List<string> _barcodes = new List<string>();
_barcodes.AddRange(ScannedBarcodes);

There's really no need to loop over those values - just create your List<string> and then add the whole IQueryable collection to it in a single call to .AddRange() ...