openFileDialog 选择文件

用OpenFileDialog选择文件:

/***选择文件***/ #region/***选择文件***/
        private void button1_Click(object sender, System.EventArgs e) 
        {
            string folderName =string.Empty;
            try
            {
                openFileDialog.InitialDirectory = @"c:\";
                openFileDialog.RestoreDirectory=true;
                openFileDialog.Filter = "(*.mdb)|*.*" ;
                openFileDialog.FilterIndex=1;
                
                DialogResult fileresult =openFileDialog.ShowDialog(); 
                            
                if (fileresult==DialogResult.OK) 
                {
                    string     oldFilePath=openFileDialog.FileName;
                    //System.IO.FileInfo fi = new System.IO.FileInfo(oldFilePath);
                    //if(fileinfo!=null)
                    //{
            
                    if(oldFilePath.IndexOf(".mdb")>0)
                    {
                        this.txtOldfile.Text=oldFilePath;
                        string strFilePath=System.IO.Path.GetDirectoryName(oldFilePath);
                        this.p_mdbFullName=oldFilePath;
……
                p_savePath=Directory.GetParent(oldFilePath).ToString();
                    }
                    else
                    {
                        MessageBox.Show(this,"请选择将要操作的Access数据库文件","提示信息",MessageBoxButtons.OK,MessageBoxIcon.Error);
                    }
                    //}
                }
                else 
                {
                    return;
                }
            }    
            catch(Exception err) 
            {
                MessageBox.Show(this,err.Message,"选择文件",MessageBoxButtons.OK,MessageBoxIcon.Error);
            }

        }

        #endregion