做一个文件I / O项目，似乎无法保存我的文件

Question

当我点击我有新文件的文件下拉列表时，对于新文件，我提示用户。如果他们在文本框中有数据，他们是否想要在开始新文件之前保存他们所做的事情。我得到了保存提示对话框以弹出所有但我不会保存文件。

private void mnuFileNew_Click(object sender, EventArgs e)
{
    if (txtText.Text.Trim().Length <= 0)
    {
        lblStatus.ForeColor = Color.BlueViolet;
        lblStatus.Text = "New file!";
    }
    else
    {
        if (MessageBox.Show("Start new file without saving?", "Exit",
            MessageBoxButtons.YesNo, MessageBoxIcon.Question) ==  System.Windows.Forms.DialogResult.No)
        {
            try
            {
                SaveFileDialog sfd = new SaveFileDialog();
                // set properties
                sfd.Title = "Where would you like to save this?";
                sfd.InitialDirectory = @"c:\Users\public";
                sfd.Filter = "Text File (*.txt)|*.txt|All files (*.*)|*.*";
                if (sfd.ShowDialog() == System.Windows.Forms.DialogResult.OK)
                {                         
                    lblStatus.Text = sfd.FileName;
                    lblStatus.ForeColor = Color.Navy;
                }
                // show a message 
                lblStatus.ForeColor = Color.BlueViolet;
                lblStatus.Text = "The Text has been uploaded!";
            }
            catch (Exception ex)
            {
                lblStatus.ForeColor = Color.Red;
                lblStatus.Text = ex.Message;
            }
        }
        else
        {
            txtText.Text = "";
        }

Answer 1

您需要创建文件

if(sfd.ShowDialog() == DialogResult.OK)
{
    using(StreamWriter sw = new StreamWriter(sfd.FileName))
    {
      sw.WriteLine(YourTextBox.Text);
    }

}