From: 011netservice@gmail.com
Date: 2024-03-21
Subject: OpenFileDialog.txt

歡迎來信交流, 訂購軟體需求.

#### 
20240321
template:
        private void CmdOpenFile_Click(object sender, EventArgs e)
        {
            string sInitialDirectory = _Project._PathLast;
            if (!Directory.Exists(sInitialDirectory))
                sInitialDirectory = ZDirectory.ZGetCurrentDirectory();
            string sFile = string.Empty;
            using (OpenFileDialog openFileDialog = new OpenFileDialog())
            {
                openFileDialog.InitialDirectory = sInitialDirectory;
                //openFileDialog.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*";
                //openFileDialog.FilterIndex = 2;
                openFileDialog.Filter = "All files (*.*)|*.*";
                openFileDialog.FilterIndex = 1;
                openFileDialog.RestoreDirectory = true;

                if (openFileDialog.ShowDialog() == DialogResult.OK)
                    sFile = openFileDialog.FileName;
            }
            if (string.IsNullOrEmpty(sFile))
                return;
            FileInfo FileInfo1 = ZFile.ZFileInfo(sFile);
            txtFilename.Text = sFile;
            _Project._PathLast = FileInfo1.DirectoryName ?? string.Empty;

        }

ref: 
https://learn.microsoft.com/en-us/dotnet/api/system.windows.forms.openfiledialog?view=windowsdesktop-8.0&devlangs=csharp&f1url=%3FappId%3DDev17IDEF1%26l%3DEN-US%26k%3Dk(System.Windows.Forms.OpenFileDialog)%3Bk(Designer_Microsoft.DotNet.DesignTools.Client.Designers.DocumentProxyDesigner)%3Bk(NonVisualSelection)%3Bk(SolutionItemsProject)%3Bk(DevLang-csharp)%26rd%3Dtrue
var fileContent = string.Empty;
var filePath = string.Empty;

using (OpenFileDialog openFileDialog = new OpenFileDialog())
{
    openFileDialog.InitialDirectory = "c:\\";
    openFileDialog.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*";
    openFileDialog.FilterIndex = 2;
    openFileDialog.RestoreDirectory = true;

    if (openFileDialog.ShowDialog() == DialogResult.OK)
    {
        //Get the path of specified file
        filePath = openFileDialog.FileName;

        //Read the contents of the file into a stream
        var fileStream = openFileDialog.OpenFile();

        using (StreamReader reader = new StreamReader(fileStream))
        {
            fileContent = reader.ReadToEnd();
        }
    }
}

MessageBox.Show(fileContent, "File Content at path: " + filePath, MessageBoxButtons.OK);


#### 以下舊資料確認後移到上面

        void mySelectDB()
        {
            OpenFileDialog openFileDialog1 = new OpenFileDialog();

            if (String.IsNullOrEmpty(Properties.Settings.Default.PathLast))
                Properties.Settings.Default.PathLast = Application.StartupPath;

            openFileDialog1.InitialDirectory = Properties.Settings.Default.PathLast;
            openFileDialog1.Filter = "db files (*.db)|*.db|All files (*.*)|*.*";
            openFileDialog1.FilterIndex = 2;
            openFileDialog1.RestoreDirectory = true;

            if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                Properties.Settings.Default.PathLast = Path.GetDirectoryName(openFileDialog1.FileName);
                Properties.Settings.Default.Save();

                txtFile.Text = openFileDialog1.FileName;
            }

        }
        private void FMain_FormClosing(object sender, FormClosingEventArgs e)
        {
            myClosing();
        }
        void myClosing()
        {
            Properties.Settings.Default.Save();
        }