怎么样在ASP.net中获取Datatable选择第一行某一列值？

来源：www.45fan.com 2017-06-26 20:04:01

数据源是一个DataTable，现在我们需要获取这个DataTable的第一行第一列的值。

先准备一个数据集，创建一个DataTable，并填充数据：

怎么样在ASP.net中获取Datatable选择第一行某一列值？

source code:

using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Insus.NET.Models;
namespace Insus.NET.Entities
{
 public class CustomerEntity
 {
 public DataTable Customers()
 {
  DataTable dt = new DataTable();
  dt.Columns.Add(new DataColumn("CustomerID", typeof(int)));
  dt.Columns.Add(new DataColumn("CustomerName", typeof(string)));
  dt.Columns.Add(new DataColumn("PID", typeof(string)));
  DataRow dr = dt.NewRow();
  dr["CustomerID"] = 9; dr["CustomerName"] = "张三"; dr["PID"] = "123456789012";
  dt.Rows.Add(dr);
  dr = dt.NewRow();
  dr["CustomerID"] = 10; dr["CustomerName"] = "李四"; dr["PID"] = "321245677812";
  dt.Rows.Add(dr);
  dr = dt.NewRow();
  dr["CustomerID"] = 30; dr["CustomerName"] = "吴广"; dr["PID"] = "213445678912";
  dt.Rows.Add(dr);
  dr = dt.NewRow();
  dr["CustomerID"] = 35; dr["CustomerName"] = "王维"; dr["PID"] = "334456789012";
  dt.Rows.Add(dr);
  dr = dt.NewRow();
  dr["CustomerID"] = 36; dr["CustomerName"] = "赵勇"; dr["PID"] = "213445678912";
  dt.Rows.Add(dr);
  return dt;
 }
 }
}

方法一，使用LINQ和Lambda:

怎么样在ASP.net中获取Datatable选择第一行某一列值？