这是我对这个问题的代码:
DataTable dt1 = new DataTable();
dt1.Columns.Add("ID");
dt1.Columns.Add("Type");
dt1.Columns.Add("Value");
dt1.Rows.Add(new Object[] { "1", "ItemCost", "5000" });
dt1.Rows.Add(new Object[] { "2", "TravCost", "5700" });
dt1.Rows.Add(new Object[] { "3", "UpCharge", "3600" });
dt1.Rows.Add(new Object[] { "4", "TaxCost", "7000" });
DataTable dt2 = new DataTable();
dt2.Columns.Add("ID");
dt2.Columns.Add("Type");
dt2.Columns.Add("Value");
dt2.Rows.Add(new Object[] { "27", "ItemCost", "3800" });
dt2.Rows.Add(new Object[] { "28", "TravCost", "4851" });
DataTable dt3 = new DataTable();
dt3 = dt2.Clone();
foreach (DataRow item in dt2.Rows)
{
dt3.Rows.Add(new object[] { item["ID"], item["Type"], item["Value"] });
}
foreach (DataRow item in dt1.Rows)
{
DataRow[] drs = dt3.Select("Type='" + item["Type"].ToString() + "'");
if (drs.Count() == 0)
{
dt3.Rows.Add(new object[] { item["ID"], item["Type"], "N/A" });
}
}
基本上,我需要的东西就像一个VLOOKUP。但是不用表格来做,我需要用结果集来完成。 – BigBucks