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sivaprasadreddy
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need a code of C#

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hi friends
i am trying to add a help button to my program. i have added a button like this

private void button9_Click(object sender, EventArgs e)
{

System.IO.FileInfo finfo = new System.IO.FileInfo("Help.txt");

finfo.Attributes = System.IO.FileAttributes.ReadOnly;

System.Diagnostics.Process.Start("Help.txt");
}
but here i am getting problem that text file is opening but if we edit any thing that file is updating.
here i need only in the form of readonly please give me an idea for this problem.

c#
  • asked one year ago
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last answered one year ago

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I don't think that approach will work because AFAIK it's not possible to open Notepad (which will be the default text editor on most machines) in read-only mode.

What you could do instead is to add a form to your project (HelpForm say) and cover it with a TextBox (textBox1 say) whose properties are set in the Properties Box as follows:

BackColor - Info
ForeColor - InfoText
MultiLine - True
ReadOnly - true
ScrollBars - Both

You could also use a RichTextBox instead and/or add a Close Button if you don't want the user to have to rely on the 'X' button.

Then in your HelpButton click eventhandler, add the following code:

private void helpButton_Click(object sender, EventArgs e)
{
   if (Application.OpenForms["HelpForm"] == null) // don't show again if already open
   {
      string filePath = "help.txt"; // or whatever
      HelpForm help = new HelpForm();
      TextBox tb = (TextBox)help.Controls["textBox1"]; // get a reference to the textbox
      tb.Text = System.IO.File.ReadAllText(filePath);
      help.Show();
      tb.SelectionLength = 0;
   } 
}

  • answered one year ago by:

    vulpes
    17279
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