c# web 根据自定义datatable主键获取datarow

using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
namespace DataTableDemo
{
    public partial class _Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                DataTable dt = GetDataTable();
                string id="3";
                string name = "zhangsan3";
                DataRow dr1 = GetRow(dt,id);
                DataRow dr2 = GetRow(dt, id, name);
            }
        }
        /// <summary>
        /// 根据主键id获取datarow
        /// </summary>
        /// <param name="dt">datatable</param>
        /// <param name="id">id</param>
        /// <returns></returns>
        private DataRow GetRow(DataTable dt,string id)
        {
            DataRow dr = null;
            //把id定义为datatable的主键，前提是根据id必须是唯一datarow。
            dt.PrimaryKey = new DataColumn[] { dt.Columns["id"]};
            dr = dt.Rows.Find(id);
            return dr;
        }
        /// <summary>
        /// 根据主键id,name获取datarow
        /// </summary>
        /// <param name="dt">datatable</param>
        /// <param name="id">id</param>
        /// <param name="name">name</param>
        /// <returns></returns>
        private DataRow GetRow(DataTable dt, string id, string name)
        {
            DataRow dr = null;
            //把id,name定义为datatable的主键，前提是根据id,name必须是唯一datarow。
            dt.PrimaryKey = new DataColumn[] { dt.Columns["id"], dt.Columns["name"] };
            string[] str={id,name};
            dr = dt.Rows.Find(str);
            return dr;
        }
        /// <summary>
        /// 获取数据
        /// </summary>
        /// <returns></returns>
        private DataTable GetDataTable()
        {
            DataTable dt = InitDataTable();
            for (int i = 0; i < 10; i++)
            {
                DataRow dr = dt.NewRow();
                dr["id"] = i ;
                dr["name"] = "zhangsan"+i;
                dr["sex"] = "male";
                dt.Rows.Add(dr);
            }
            return dt;
        }
        /// <summary>
        /// 初始化datatable
        /// </summary>
        /// <returns></returns>
        private DataTable InitDataTable()
        {
            DataTable dt = new DataTable();
            dt.Columns.Add(new DataColumn("id"));
            dt.Columns.Add(new DataColumn("name"));
            dt.Columns.Add(new DataColumn("sex"));
            return dt;
        }
    }
}