Programming Forums > Application Development > C#

Jason Isom · Sep 12th, 2006, 4:44 PM

Quote:

Originally Posted by crawforddavid2006

I lied... that is not the end of my problems

. What Jason said does work but it leaves a little rectangle shape after each line. I tried using \b after the \n but it will not accept that. Any Ideas?

Are you using .NET 2.0? If so:

 csharp Syntax (Toggle Plain Text) 
comboBox1.Items.AddRange(System.IO.File.ReadAllLines(@"c:\collection.txt"));
comboBox1.Items.AddRange(System.IO.File.ReadAllLines(@"c:\collection.txt"));

This isn't the only solution, however. In .NET, the newline is encoded as Environment.NewLine (usually \r\n).

 csharp Syntax (Toggle Plain Text) 
string s = System.IO.File.ReadAllText(@"c:\collection.txt");
string[] delimiters = new string[1];
delimiters[0] = Environment.NewLine;
comboBox1.Items.AddRange(s.Split(delimiters, StringSplitOptions.None));
string s = System.IO.File.ReadAllText(@"c:\collection.txt");
string[] delimiters = new string[1];
delimiters[0] = Environment.NewLine;
comboBox1.Items.AddRange(s.Split(delimiters, StringSplitOptions.None));

Which can be shortened to:

 csharp Syntax (Toggle Plain Text) 
string s = System.IO.File.ReadAllText(@"c:\collection.txt");
comboBox1.Items.AddRange(s.Split(new string[]{Environment.NewLine}, StringSplitOptions.None));
string s = System.IO.File.ReadAllText(@"c:\collection.txt");
comboBox1.Items.AddRange(s.Split(new string[]{Environment.NewLine}, StringSplitOptions.None));

Ooble · Sep 12th, 2006, 9:36 PM

There's an AddRange function? Funky.

crawforddavid2006 · Sep 12th, 2006, 9:48 PM

Thanks Jason. your idea for .NET 2.0 worked.

crawforddavid2006 · Jun 4th, 2007, 1:31 AM

ok I can't figure out for the life of me how to write all the items in a combo box to a text file, can someone help me with this please?

xavier · Jun 4th, 2007, 2:35 AM

Probably I should ask how exactly did you try .. but nevermind that :

try :

 csharp Syntax (Toggle Plain Text) 
        comboBox1.Items.Add("asdasd");
	foreach (Object o in comboBox1.Items)
	{
		MessageBox.Show(o.ToString());
	}
        comboBox1.Items.Add("asdasd");
	foreach (Object o in comboBox1.Items)
	{
		MessageBox.Show(o.ToString());
	}

crawforddavid2006 · Jun 4th, 2007, 3:09 AM

i'm a little confused, how does that write the items in the comboBox to a text file?

xavier · Jun 4th, 2007, 4:43 AM

Quote:

Originally Posted by crawforddavid2006

i'm a little confused, how does that write the items in the comboBox to a text file?

well that gives you the items in the comboBox, i suppose you know how to write to a text file. How about showing some code ?:beard:
I was under the impression that you couldn't get the items from the combo.

crawforddavid2006 · Jun 4th, 2007, 3:30 PM

Well i can get them, but when i write them to the file it says "System.Windows.Forms.ComboBox+ObjectCollection" in the text file, not the items.

xavier · Jun 5th, 2007, 4:14 AM

Ok mate . I'm assuming you have strings in that comboBox, otherwise you will have to do a cast to the object that is in the Combo.

 csharp Syntax (Toggle Plain Text) 
// instantiate the writer class : let's say writer
    foreach (Object o in comboBox1.Items)
    {
        writer.Write(o.ToString); // or ((YourObject)o).ToString(); - if it's not a base type
    }
// instantiate the writer class : let's say writer
    foreach (Object o in comboBox1.Items)
    {
        writer.Write(o.ToString); // or ((YourObject)o).ToString(); - if it's not a base type
    }

If it doesn't work, just post the code.

crawforddavid2006 · Jun 5th, 2007, 9:33 PM

sorry i forgot to post after my last one, i found a way to do it, so thanks for all your help.

Sep 12th, 2006, 9:36 PM	#22
Ooble I eat cake for breakfast. Join Date: Jul 2004 Location: In my box. Posts: 4,434 Rep Power: 9	There's an AddRange function? Funky. __________________ Me :: You :: Them

Jun 4th, 2007, 2:35 AM	#25
xavier Professional Programmer Join Date: Oct 2004 Location: .ro Posts: 383 Rep Power: 4	Probably I should ask how exactly did you try .. but nevermind that : try : csharp Syntax (Toggle Plain Text) comboBox1.Items.Add("asdasd"); foreach (Object o in comboBox1.Items) { MessageBox.Show(o.ToString()); } comboBox1.Items.Add("asdasd"); foreach (Object o in comboBox1.Items) { MessageBox.Show(o.ToString()); } __________________ Don't take life too seriously, it's not permanent !

Jun 5th, 2007, 4:14 AM	#29
xavier Professional Programmer Join Date: Oct 2004 Location: .ro Posts: 383 Rep Power: 4	Ok mate . I'm assuming you have strings in that comboBox, otherwise you will have to do a cast to the object that is in the Combo. csharp Syntax (Toggle Plain Text) // instantiate the writer class : let's say writer foreach (Object o in comboBox1.Items) { writer.Write(o.ToString); // or ((YourObject)o).ToString(); - if it's not a base type } // instantiate the writer class : let's say writer foreach (Object o in comboBox1.Items) { writer.Write(o.ToString); // or ((YourObject)o).ToString(); - if it's not a base type } If it doesn't work, just post the code. __________________ Don't take life too seriously, it's not permanent !

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Programming Forums > Application Development > C#

Combo Box