Question

在我的表格中，我有这个：

private void button_Click_C_Open(object sender, EventArgs e)
{
        Stream myStream = null;
        OpenFileDialog openFileDialog1 = new OpenFileDialog();

        openFileDialog1.InitialDirectory = "c:\\";
        openFileDialog1.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*";
        openFileDialog1.FilterIndex = 2;
        openFileDialog1.RestoreDirectory = true;

        if (openFileDialog1.ShowDialog() == DialogResult.OK)
        {
            try
            {
                if ((myStream = openFileDialog1.OpenFile()) != null)
                {
                    using (myStream)
                    {

                        filein = openFileDialog1.FileName;
                        fileout = "D://Download/Scuola/C++/Visual Studio/genericFileName.txt"; //crea un file e ci mette la roba criptata
                        textFileScelto.Text = filein;
                    }
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show("Error: Could not read file from disk. Original error: " + ex.Message);
            }
        }
}

我想知道两件我不知道如何做的事情......

对于fileout，如何调出SaveFileDialog而不是手动输入程序中的位置（编号：fileout = "D: // downloads / School / C ++ / Visual Studio / genericFileName.txt"）？
如何确保fileout与filein的格式相同？（例如，如果我在file.exe中选择文件，则文件输出必须已.exe，我必须只选择名称。

在此先感谢，我为任何语法错误道歉。我希望我能理解你的答案。

修改我解决了我的第一个问题（.1），但现在出现了另一个问题：

private void button_Click_C_Open(object sender, EventArgs e)
    {
        Stream myStream = null;
        OpenFileDialog openFileDialog1 = new OpenFileDialog();

        //openFileDialog1.InitialDirectory = "c:\\";
        openFileDialog1.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*";
        openFileDialog1.FilterIndex = 2;
        openFileDialog1.RestoreDirectory = true;

        if (openFileDialog1.ShowDialog() == DialogResult.OK)
        {
            try
            {
                if ((myStream = openFileDialog1.OpenFile()) != null)
                {
                    using (myStream)
                    {
                        filein = openFileDialog1.FileName; //file in lo scegliamo dal openfiledialog
                        textFileScelto.Text = filein; //visualizza la scelta in una textbox
                    }
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show("Error: Could not read file from disk. Original error: " + ex.Message);
            }
        }
    }

    private void Encypt_File_Click(object sender, EventArgs e)
    {
        try
        {
            Stream my1Stream;
            SaveFileDialog saveFileDialog1 = new SaveFileDialog();

            saveFileDialog1.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*";
            saveFileDialog1.FilterIndex = 2;
            saveFileDialog1.RestoreDirectory = true;

            if (saveFileDialog1.ShowDialog() == DialogResult.OK)
            {
                if ((my1Stream = saveFileDialog1.OpenFile()) != null)
                {
                    fileout = saveFileDialog1.FileName;
                    passwordBytes = GetPasswordBytes();
                    AES.EncryptFile(filein, fileout, passwordBytes);
                    MessageBox.Show("File Criptato!");
                    my1Stream.Close();
                }
            }

        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message);
        }
    }

现在，当我输入要保存的文件的名称时，它会给我一个错误：进程无法访问文件（目录+ fileout的名称）因为它正被另一个进程使用。 :(为什么？

Answer 1

1）SaveFileDialog（与OpenFileDialog大致相同）

2）只需设置SaveFileDialog选项以强制扩展。您也可以在用户退出对话框后自行验证和/或强制扩展。

如何用我的按钮实现SaveFileDialog？

1 个答案: