using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Data.OleDb;
using Microsoft.Win32.SafeHandles;
using System.Runtime.InteropServices;
using System.Threading;


namespace own_act_change_price
{
    public partial class ListOfDocumentsForm : Form
    {
        public const uint GENERIC_WRITE = 0x40000000;
        public const uint FILE_SHARE_READ = 0x00000001;
        public const uint OPEN_EXISTING = 3;

        [DllImport("kernel32.dll", SetLastError = true)]
        static extern SafeFileHandle CreateFile(string lpFileName, uint dwDesiredAccess,
          uint dwShareMode, IntPtr lpSecurityAttributes, uint dwCreationDisposition,
          uint dwFlagsAndAttributes, IntPtr hTemplateFile);

        [DllImport("kernel32.dll", SetLastError = true)]
        static extern bool WriteFile(SafeFileHandle hFile, String lpBuffer,
          uint nNumberOfBytesToWrite, out uint lpBufferOfBytesWritten, IntPtr lpOverlapped);


        public ListOfDocumentsForm()
        {
            InitializeComponent();
        }


        private void button1_Click(object sender, EventArgs e)	//OK button
        {
            own_PreViewAct();
        }

        private void button2_Click(object sender, EventArgs e)	//Cancel button
        {
            Close();
        }

        private void ListOfDocumentsForm_Shown(object sender, EventArgs e)
        {
            if (dataGridView1.RowCount <= 0)
                button1.Enabled = false;
            else
                dataGridView1.Rows[0].Selected = true;
        }

        private void dataGridView1_CellDoubleClick(object sender, DataGridViewCellEventArgs e)
        {
            if (dataGridView1.RowCount > 0 && e.RowIndex >= 0 && e.ColumnIndex >= 0)
            {
                own_PreViewAct();
            }
        }


        private void own_PreViewAct()
        {
            uint k = 0;
            try
            {
                string MailSlotName = "";

                if(wv2.whichcase == 0)
                    wv2.docdate = Convert.ToDateTime(dataGridView1.SelectedRows[0].Cells[1].Value).ToShortDateString();

                if (wv2.whichcase == 2)
                    m_ResultParams = "P_DATENAME=" + char.ToString('"') + "Дата исполнения" + char.ToString('"') + " P_DATE=" + wv2.execdate;
                else
                    m_ResultParams = "P_DATENAME=" + char.ToString('"') + "Дата документа" + char.ToString('"') + " P_DATE=" + wv2.docdate;
                m_ResultParams += " P_DOC_ID=" + char.ToString('"') + Convert.ToString(dataGridView1.SelectedRows[0].Cells[0].Value).Trim() + char.ToString('"');
                MailSlotName = Environment.CommandLine;
                int iPos = MailSlotName.IndexOf(" ");

                MailSlotName = iPos > 0 ? MailSlotName.Substring(0, iPos) : MailSlotName;

                SafeFileHandle hFile = null;

                hFile =
                    CreateFile(MailSlotName,
                        GENERIC_WRITE,
                        FILE_SHARE_READ,
                        IntPtr.Zero,
                        OPEN_EXISTING,
                        0,
                        IntPtr.Zero);

                if (hFile.IsInvalid)
                {
                    MessageBox.Show("MailSlot недоступен клиенту.", "Ошибка!", MessageBoxButtons.OK, MessageBoxIcon.Error);
                    return;
                }

                if (!WriteFile(hFile, m_ResultParams, (uint)(m_ResultParams.Length), out k, IntPtr.Zero))
                {
                    MessageBox.Show("Ошибка записи в MailSlot. Ошибка!", "Ошибка!", MessageBoxButtons.OK, MessageBoxIcon.Error);
                    return;
                }

                hFile.Close();

            }
            catch (Exception ex)
            {
                MessageBox.Show("Function name: 'button1_Click(object sender, EventArgs e)'\n" + "Method name: " + ex.TargetSite.ToString() + "\nMessage: " + ex.Message, "Error message", MessageBoxButtons.OK, MessageBoxIcon.Error);
                Close();
            }
            Close();
        }


    }
}