var results = from myRow in myDataTable
where results.Field<Int32>("RowNo") == 1
select results;

正如@ch00k所说:

using System.Data; //needed for the extension methods to work

...

var results = 
    from myRow in myDataTable.Rows 
    where myRow.Field<int>("RowNo") == 1 
    select myRow; //select the thing you want, not the collection

您还需要向System.Data.DataSetExtensions添加一个项目引用

你可以像这样通过linq让它优雅地工作:

from prod in TenMostExpensiveProducts().Tables[0].AsEnumerable()
where prod.Field<decimal>("UnitPrice") > 62.500M
select prod

或者像动态linq这样(AsDynamic直接在DataSet上调用):

TenMostExpensiveProducts().AsDynamic().Where (x => x.UnitPrice > 62.500M)

我更喜欢最后一种方法，因为它是最灵活的。 附注:不要忘记连接System.Data.DataSetExtensions.dll引用

您可以尝试这样做，但必须确定每个Column的值类型

List<MyClass> result = myDataTable.AsEnumerable().Select(x=> new MyClass(){
     Property1 = (string)x.Field<string>("ColumnName1"),
     Property2 = (int)x.Field<int>("ColumnName2"),
     Property3 = (bool)x.Field<bool>("ColumnName3"),    
});

var results = from DataRow myRow in myDataTable.Rows
    where (int)myRow["RowNo"] == 1
    select myRow

IEnumerable<string> result = from myRow in dataTableResult.AsEnumerable()
                             select myRow["server"].ToString() ;