覆蓋RichTextBox中的文本文件

Question

現在，如果您編寫文本並單擊保存button，則會出現OpenFileDialog。如果您在同一份文件中完成某項操作並再次單擊save button，則需要再次選擇保存位置。如何在保存同一個文件時不需要每次創建一個新文件，而只是覆蓋當前文件？對不起我的英語不好。

private void buttonSave_Click(object sender, EventArgs e) 
{ 
    SaveFileDialog sfd = new SaveFileDialog(); 
    sfd.Filter = "Rich Text File | *.rtf"; 

    if (sfd.ShowDialog() == DialogResult.OK) 
    { 
     richTextBox1.SaveFile(sfd.FileName); 
    } 
    else 
    { 

    } 
} 

Answer 1

可以肯定的是，你只需要記住你最後保存的文件路徑，而不是顯示周圍的下次再來的對話框;這樣的事情應該有所幫助：

void Main() 
{ 
    Save(); 
} 

private string _filePath = ""; 
void Save() 
{ 
    var overwrite = false; 

    if (!string.IsNullOrEmpty(_filePath)) 
    { 
     var res = 
     MessageBox.Show("Would you like to overwrite your last saved file?", "Overwrite?", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Warning, MessageBoxDefaultButton.Button1, 
     MessageBoxOptions.DefaultDesktopOnly, false); 

     if (res == DialogResult.Cancel) return; 
     if (res == DialogResult.No) overwrite = false; 
     if (res == DialogResult.Yes) overwrite = true; 
    } 

    if (!overwrite) 
    { 
     var sfd = new SaveFileDialog(); 
     sfd.Filter = "Rich Text File|*.rtf"; 
     var res = sfd.ShowDialog(); 
     if (res != DialogResult.OK) return; 
     _filePath = sfd.FileName; 
    } 

    // do the richTextBox.SaveFile(_filePath) here. 

} 

在這個例子中：

CHECK IF FILE PATH ALREADY SET 
IF NOT THEN 
    ASK USER IF THEY WANT TO OVERWRITE THE LAST FILE 
    IF CANCEL THEN DON'T SAVE 
    IF YES THEN SET OVERWRITE TO TRUE 
    IF NO THEN SET OVERWRITE TO FALSE 
END IF 
CHECK IF OVERWRITING 
IF OVERWRITING THEN 
    SHOW SAVE FILE DIALOG 
    IF USER DIDN'T CLICK OK THEN DON'T SAVE 
    IF USER CLICKED OK, SET THE NEW FILE PATH TO USE 
END IF 
SAVE THE FILE USING THE NOW-REMEMBERED FILE PATH 

Answer 2

或許：從

private void SaveButton_Click(object sender, EventArgs e) 
{ 

SaveFileDialog saveFileDialog1 = new SaveFileDialog(); 
saveFileDialog1.InitialDirectory = @"C:\"; 
saveFileDialog1.Title = "Save text Files"; 
saveFileDialog1.CheckFileExists = true; 
saveFileDialog1.CheckPathExists = true; 
saveFileDialog1.DefaultExt = "txt"; 
saveFileDialog1.Filter = "Text files (*.txt)|*.txt|All files (*.*)|*.*"; 
saveFileDialog1.FilterIndex = 2; 
saveFileDialog1.RestoreDirectory = true;  

if (saveFileDialog1.ShowDialog() == DialogResult.OK) 
{ 
    textBox1.Text = saveFileDialog1.FileName;    
} 
} 

例子：http://www.c-sharpcorner.com/uploadfile/mahesh/savefiledialog-in-C-Sharp/

可能有助於一些？

Answer 3

private string filePath = string.Empty; 
    private void SaveButton_Click(object sender, EventArgs e) 
    { 
     if (File.Exists(filePath)) 
     { 
      byte[] buffer = Encoding.ASCII.GetBytes(richTextBox1.Text); 
      MemoryStream ms = new MemoryStream(buffer); 
      //write to file 
      FileStream file = new FileStream(filePath, FileMode.Create, FileAccess.Write); 
      ms.WriteTo(file); 
      file.Close(); 
      ms.Close(); 
     } 
     else 
     { 
      SaveFileDialog sfd = new SaveFileDialog(); 
      sfd.Filter = "Rich Text File | *.rtf"; 
      sfd.OverwritePrompt = false; 
      if (sfd.ShowDialog() == DialogResult.OK) 
      { 
       richTextBox1.SaveFile(sfd.FileName); 
       filePath = sfd.FileName; 

      } 
     } 
    } 

您可以使用sfd.OverwritePrompt = false;屬性，以避免提示messagebox如果文件已經存在，這是你在找什麼？