覆盖RichTextBox中的文本文件

Question

现在，如果您编写文本并单击保存button，则会出现OpenFileDialog。如果您在同一份文件中完成某项操作并再次单击save button，则需要再次选择保存位置。如何在保存同一个文件时不需要每次创建一个新文件，而只是覆盖当前文件？对不起我的英语不好。

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，你只需要记住你最后保存的文件路径，而不是显示周围的下次再来的对话框;这样的事情应该有所帮助：

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. 

} 

在这个例子中：

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

或许：从

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/

可能有助于一些？

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;属性，以避免提示messagebox如果文件已经存在，这是你在找什么？