c# - 关闭保存文件对话框

Question

我在关闭 saveFileDialog 时遇到问题。当我点击“取消”窗口时再次出现。这是我的代码:

        private void SaveAsItem_Click(object sender, EventArgs e)
    {
        saveFileDialog1.FileName = "untitled";
        saveFileDialog1.Filter = "Text (*.txt)|*.txt";
        saveFileDialog1.ShowDialog();
        System.IO.StreamWriter SaveFile = new System.IO.StreamWriter(saveFileDialog1.FileName);
        if (saveFileDialog1.ShowDialog()==DialogResult.Cancel)
        {
            richTextBox1.Text = "CANCEL";
            issaved = false;
        }
        else
        {
            issaved = true;
            SaveFile.WriteLine(richTextBox1.Text);
        }
        SaveFile.Close();
    }

Answer 1

您正在调用 saveFileDialog1.ShowDialog() 两次，一次显示它，一次获取结果。你只需要调用一次。单独删除 saveFileDialog1.ShowDialog(); 行，您已经在 if 条件中执行了该操作。

编辑:您还需要将所有 FileStream 操作移到 else block 内，以便在删除该行后它可以正常工作。这是我编辑的版本:

    private void SaveAsItem_Click(object sender, EventArgs e)
{
    saveFileDialog1.FileName = "untitled";
    saveFileDialog1.Filter = "Text (*.txt)|*.txt";
    if (saveFileDialog1.ShowDialog()==DialogResult.Cancel)
    {
        richTextBox1.Text = "CANCEL";
        issaved = false;
    }
    else
    {
        System.IO.StreamWriter SaveFile = new System.IO.StreamWriter(saveFileDialog1.FileName);
        issaved = true;
        SaveFile.WriteLine(richTextBox1.Text);
        SaveFile.Close();
    }
}

您也可以完全跳过 FileStream，只执行 File.WriteAlltext(saveFileDialog1.FileName, richTextBox1.Text)。