using System;
using System.Collections.Generic;
using
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using NationalInstruments;
using NationalInstruments.DAQmx;


namespace DAQ_Example
{
   
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            CheckForIllegalCrossThreadCalls = false;
        }


        System.Timers.Timer timer2;



        private void button1_Click(object sender, EventArgs e)
        {


           
            timer2 = new System.Timers.Timer(100);
            timer2.AutoReset = true;
            timer2.Enabled = true;
            timer2.Elapsed += new System.Timers.ElapsedEventHandler(timer2_Elapsed);



        }


        
        void timer2_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
        {

               // Control.CheckForIllegalCrossThreadCalls = false;


            Task temperatureTask = new Task();
            AIChannel myAIChannel;
            myAIChannel = temperatureTask.AIChannels.CreateThermocoupleChannel(
                "Dev1/ai0",
                "Temperature",
                0,
                100,
                AIThermocoupleType.J,
                AITemperatureUnits.DegreesC,
                25
                );

            AnalogSingleChannelReader reader = new
                AnalogSingleChannelReader(temperatureTask.Stream);

                //System.Windows.Forms.Control.CheckForIllegalCrossThreadCalls = false;
                double analogDataIn = reader.ReadSingleSample();//出现问题的语句

                textBox1.Text = analogDataIn.ToString();
            

        }

        private void label1_Click(object sender, EventArgs e)
        {

        }
      
    }
}

你确定reader.ReadSingleSample();是double类型吗？？自己检查下是不是类型不对