对话框不适用于SAP Business One附加组件

我的SAP Business One插件使用了下面的代码，它从一个对话框读取Excel表格。在测试我的插件时，我在

Thread.Sleep(1);  // Wait a sec more

在Visual Studio 2012中。这样可以打开对话框，以便我可以选择Excel文件，因为在SAP

对话框必须在一个单独的线程上运行。
1. 对话框必须是SAP客户端窗口的正确实例的模态。

在Visual Studio中调试/测试时，该插件运行良好，可以选择复制到矩阵的Excel工作表。然而，当我使用。exe文件在SAP(可执行文件)中注册时，在我选择对话框上的excel文件(按OK)后不久，该插件就挂起了。

我在代码中做错了什么?#

private void GetFileHeader()
        {
            using (GetFileNameClass oGetFileName = new GetFileNameClass())
            {
                oGetFileName.Filter = "Excel files (*.csv)|*.csv";
                oGetFileName.InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.Personal);
                Thread threadGetExcelFile = new Thread(new ThreadStart(oGetFileName.GetFileName));
                threadGetExcelFile.SetApartmentState(ApartmentState.STA);
                try
                {
                    threadGetExcelFile.Start();
                    while (!threadGetExcelFile.IsAlive) ; // Wait for thread to get started
                    Thread.Sleep(1); // Wait a sec more
                    threadGetExcelFile.Join(); // Wait for thread to end
                    var fileName = string.Empty;
                    fileName = oGetFileName.FileName;
                    if (fileName != string.Empty)
                    {
                        string connString = "";
                        System.Data.DataTable dt = new System.Data.DataTable();
                        // Initialize connection string
                        connString = String.Format("Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties='"Excel 12.0;HDR=YES'"", fileName);
                        // Connect
                        OleDbConnection myConnection = new OleDbConnection(connString);
                        // Open connection if closed
                        if (myConnection.State != ConnectionState.Open)
                            myConnection.Open();
                        string fName = fileName;
                        fName = System.IO.Path.GetFileNameWithoutExtension(fName);
                        string sql = "SELECT * FROM [" + fName + "$] WHERE RecordKey IS NOT NULL";
                        OleDbCommand cmd = new OleDbCommand(sql, myConnection);
                        cmd.CommandType = CommandType.Text;
                        OleDbDataAdapter adapter = new OleDbDataAdapter(cmd);
                        adapter.Fill(dt);
                        if (dt != null)
                        {

GetFileNameClass

using System;
using System.Diagnostics;
using System.Windows.Forms;
using System.Threading;
using System.Runtime.InteropServices;
namespace SBOPlugins.Enumerations
{
    public enum eFileDialog { en_OpenFile = 0, en_SaveFile = 1 };
}
namespace CoreFrieght_Intraspeed
{
    /// <summary>
    /// Wrapper for OpenFileDialog
    /// </summary>
    public class GetFileNameClass : IDisposable
    {
        #region The class implements FileDialog for open in front of B1 window
        [DllImport("user32.dll")]
        private static extern IntPtr GetForegroundWindow();
        System.Windows.Forms.FileDialog _oFileDialog;
        // Properties
        public string FileName
        {
            get { return _oFileDialog.FileName; }
            set { _oFileDialog.FileName = value; }
        }
        public string[] FileNames
        {
            get { return _oFileDialog.FileNames; }
        }
        public string Filter
        {
            get { return _oFileDialog.Filter; }
            set { _oFileDialog.Filter = value; }
        }
        public string InitialDirectory
        {
            get { return _oFileDialog.InitialDirectory; }
            set { _oFileDialog.InitialDirectory = value; }
        }
        //// Constructor
        //public GetFileNameClass()
        //{
        //    _oFileDialog = new OpenFileDialog();
        //}
        // Constructor
        public GetFileNameClass(SBOPlugins.Enumerations.eFileDialog dlg)
        {
            switch ((int)dlg)
            {
                case 0: _oFileDialog = new System.Windows.Forms.OpenFileDialog(); break;
                case 1: _oFileDialog = new System.Windows.Forms.SaveFileDialog(); break;
                default: throw new ApplicationException("GetFileNameClass Incorrect Parameter");
            }
        }
        public GetFileNameClass()
            : this(SBOPlugins.Enumerations.eFileDialog.en_OpenFile)
        {
        }
        // Dispose
        public void Dispose()
        {
            _oFileDialog.Dispose();
        }
        // Methods
        public void GetFileName()
        {
            IntPtr ptr = GetForegroundWindow();
            WindowWrapper oWindow = new WindowWrapper(ptr);
            if (_oFileDialog.ShowDialog(oWindow) != System.Windows.Forms.DialogResult.OK)
            {
                _oFileDialog.FileName = string.Empty;            
            }
            oWindow = null;
        } // End of GetFileName
        #endregion
        #region WindowWrapper : System.Windows.Forms.IWin32Window
        public class WindowWrapper : System.Windows.Forms.IWin32Window
        {
            private IntPtr _hwnd;
            // Property
            public virtual IntPtr Handle
            {
                get { return _hwnd; }
            }
            // Constructor
            public WindowWrapper(IntPtr handle)
            {
                _hwnd = handle;
            }
        }
        #endregion
    }
}

感谢您的帮助。