Question

ASP.NET 中 datatable.select读取字段长度 dt.Select("len(groupid)=2");无效

Answer 1

经验证len管用 你还是看看自己带吗吧，附自己测试带吗
using System;
using System.Collections.Generic;
using System.Text;
using System.Data;

namespace DataTableSelect
{
class Program
{
static void Main(string[] args)
{
DataTable dt = new DataTable();

dt.Columns.Add("Col");

DataRow dr1 = dt.NewRow();
dr1[0] = "1";
dt.Rows.Add(dr1);

DataRow dr2 = dt.NewRow();
dr2[0] = "12";
dt.Rows.Add(dr2);

DataRow dr3 = dt.NewRow();
dr3[0] = "123";
dt.Rows.Add(dr3);

DataRow[] drs = dt.Select("len(Col)=2");
Console.ReadKey();
}
}
}