Streamreader, .txt file

matthew king

Sir/Ma'am
I have a .txt file int the following format:
[test1]
blue
red
green
[test2]
one
two
three
[test3]
white
black
grey

I'm trying to read the everything below [test2] and above [test3] into a combobox. So, I'm trying to populate comboBox1 with one, two, and three. I thought this might work, but I was wrong:
{
comboBox1.Items.Clear();
using (StreamReader sr = new StreamReader(@"c:\test.cfg"))
{
String line1;
do
{
line1 = sr.ReadLine();
if (line1.StartsWith("[test2"))
{
line1 = line1.Split(']')[1].Trim();
String[] strgArray;
strgArray = line1.Split('\n');
foreach (String strg in strgArray)
{
comboBox1.Items.Add(strg.Trim());
}
break;
}
}
while ((line1 != null));
Console.Read();
}
}
}
THANK YOU!!!

4 Replies

Know the answer? Post it — somebody with the same question will find it here.

Jaish Mathews16y ago
Hi,
Which set needs to populate with combo?
1. Exactly [Test2] items or
2. Any set of items coming second, those items?
0
matthew king16y ago
Sirs,
You guys nailed it! You came up with exactly what I asked for. However, I did a poor job of trying to articulate what I was try to accomplish. I'm trying to make the .cfg file dynamic, so the the order in which the [test1], [test2], and [test3] won't matter. From what I asked, test2 would have to be between [test1] and [test3] for combox2 to be populated with the data. However, what happens if the user moves [test2] up one position. Thus, [test1] would be populated in the combobox. Again, I appreciate the help!
0
Jaish Mathews16y ago
Try this. It seems like ur logic never went through the idea that ReadLine() will move through line by line only.
using (StreamReader str = new StreamReader(@"c:\test.cfg"))
                {
                    String line1;
                    while (!str.EndOfStream)
                    {
                        line1 = str.ReadLine();
                        if (line1.StartsWith("[test2"))
                        {
                            line1 = str.ReadLine();
                            while (!line1.StartsWith("[test3"))
                            {
                                //ADD ITEMS HERE//////////////
                                line1 = str.ReadLine();
                            }
                        }
                    }
                }
0

Amit Choudhary16y ago

hi friend,

i have worked on your code.. it is reading form the file and binding to combobox is working well:

using (StreamReader sr = new StreamReader(@"c:\test.cfg"))

                    String line1;

                    while (sr.ReadLine() != null)

                        line1=sr.ReadLine().Trim();

                        if (line1 == "[test2]")

                            break;

                            //You can populate here another combobox or dropdownlist list what ever be your control

                        else

                            if (line1.Contains("["))

                                continue;

                            else

                                ComboBox1.Items.Add(line1.Trim());

But there is a problem i found that your string "[test1]" is not readable by StreamReader. it just getting skipped while reading from file and so

the condition

if (line1 == "[test2]")

never gets executed.

Hope it helps. Please mark as answer if you get some help.