LINQ - via cz

DataTable2List.cs

var input = "PQR";
DataTable dt = new DataTable();
dt.Columns.Add("PId", typeof(Int32));
dt.Columns.Add("PName", typeof(string));
dt.Columns.Add("Qty", typeof(Int32));
dt.Rows.Add(123, "XYZ", 2);
dt.Rows.Add(223, "ABC", 4);
dt.Rows.Add(434, "PQR", 33);

var stkLists = dt.AsEnumerable().ToList();
var matchList = stkLists.Where(m => m["PName"].ToString().StartsWith(input)).ToList();
var FinalList = matchList.Concat(stkLists.Except(matchList).ToList());

// 输入值匹配的项放最前边，剩余的按原来的顺序