如何将文本框的内容保存到文件

Question

I have looked around on several answers to similar questions, but somehow this isnt working for me. I am trying to save the contents of a textbox into a user promptet file.

private void btnSave_Click(object sender, EventArgs e)
{
    Stream myStream;
    SaveFileDialog saveFileDialog1 = new SaveFileDialog();

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

    if (saveFileDialog1.ShowDialog() == DialogResult.OK)
    {
        if ((myStream = saveFileDialog1.OpenFile()) != null)
        {
            File.WriteAllText(saveFileDialog1.FileName, rtbIncoming.Text);
            myStream.Close();
        }
    }
}    

The User prompt pops up as expected, and the file is generated but without any content.

Answer 1

You don't need to open the file stream yourself. File.WriteAllText() does all this for you. So this should be enough:

if (saveFileDialog1.ShowDialog() == DialogResult.OK)
    File.WriteAllText(saveFileDialog1.FileName, rtbIncoming.Text);

I guess your code leads to an empty file because you open a seperate stream that isn't used to write and closed (and flushed) after the call to WriteAllText() .