NTwainのサンプル丸コピペ

gistfile1.cs

using NTwain;
using NTwain.Data;
using NTwain.Values;
using System;
using System.Windows.Forms;

namespace scantest
{
    public partial class Form1 : Form
    {
        TwainSession twain;
        public Form1()
        {
            InitializeComponent();
            SetupTwain();
        }


        private void SetupTwain()
        {
            TWIdentity appId = TWIdentity.Create(DataGroups.Image, new Version(1, 0), "My Company", "Test Family", "Tester", null);
            twain = new TwainSession(appId);
            twain.DataTransferred += (s, e) =>
            {
                if (e.Data != IntPtr.Zero)
                {
                    //_ptrTest = e.Data;
                    var img = e.Data.GetDrawingBitmap();
                    if (img != null)
                        pictureBox1.Image = img;
                }
            };

            twain.SourceDisabled += delegate
            {
                //step = "Close DS";
                var rc2 = twain.CloseSource();
                rc2 = twain.CloseManager();

                if (InvokeRequired)
                {
                    Invoke(new Action(delegate
                    {
                        MessageBox.Show("Success!");
                    }));
                }
                else
                {
                    MessageBox.Show("Success!");
                }
            };
            twain.TransferReady += (s, te) =>
            {
                //te.CancelAll = true;
            };
            Application.AddMessageFilter(twain);
        }

        private void button1_Click(object sender, EventArgs e)
        {

            TWIdentity dsId;
            TWStatus status = null;

            string step = "Open DSM";

            // bad idea but anyway
            IntPtr hand = this.Handle;

            var rc = twain.OpenManager(ref hand);
            if (rc == ReturnCode.Success)
            {
                step = "User Select";
                rc = twain.DGControl.Identity.UserSelect(out dsId);
                //rc = DGControl.Status.Get(ref stat);

                //TwEntryPoint entry;
                //rc = DGControl.EntryPoint.Get(dsId, out entry);
                if (rc == ReturnCode.Success)
                {
                    step = "Open DS";
                    rc = twain.OpenSource(dsId);
                    //rc = DGControl.Status.Get(dsId, ref stat);
                    if (rc == ReturnCode.Success)
                    {
                        step = "Enable DS";
                        rc = twain.EnableSource(SourceEnableMode.NoUI, false, hand);
                        return;
                    }
                    else
                    {
                        twain.DGControl.Status.GetSource(out status);
                    }
                }
                else
                {
                    twain.DGControl.Status.GetManager(out status);
                }
                twain.CloseManager();
            }
            else
            {
                twain.DGControl.Status.GetManager(out status);
            }

            MessageBox.Show(string.Format("Failed at {0}: RC={1}, CC={2}", step, rc, status.ConditionCode));
        }
    }
}