I have three combobox in C# and want the data from this combobox to save in notepad each in new line

Question

1.00/5 (1 vote)

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private void hrs_combobx_SelectedIndexChanged(object sender, EventArgs e)
{
if (File.Exists(@"C:\Users\admin\Documents\combobox1.txt"))
{
using (StreamWriter sw = new StreamWriter(@"C:\Users\admin\Documents\combobox1.txt"))
{
sw.WriteLine(hrs_combobx.SelectedItem);
sw.Close();
}
using (StreamReader sr = new StreamReader(@"C:\Users\admin\Documents\combobox1.txt"))
{
string line1 = sr.ReadLine();
if (line1 != null)
{
hrs_combobx.Text = line1;
line1 = sr.ReadLine();
sr.Close();
}
}
}
}

private void min_combobx_SelectedIndexChanged(object sender, EventArgs e)
{
if (File.Exists(@"C:\Users\admin\Documents\combobox1.txt"))
{
using (StreamWriter sw = new StreamWriter(@"C:\Users\admin\Documents\combobox1.txt"))
{
sw.WriteLine(min_combobx.SelectedItem);
sw.Close();
}
using (StreamReader sr = new StreamReader(@"C:\Users\admin\Documents\combobox1.txt"))
{
string line2 = sr.ReadLine();
if (line2 != null)
{
sec_combobx.Text = line2;
line2 = sr.ReadLine();
sr.Close();
}
}

}
}

private void sec_combobx_SelectedIndexChanged(object sender, EventArgs e)
{
if (File.Exists(@"C:\Users\admin\Documents\combobox1.txt"))
{
using (StreamWriter sw = new StreamWriter(@"C:\Users\admin\Documents\combobox1.txt"))
{
sw.WriteLine(sec_combobx.SelectedItem);
sw.Close();
}
using (StreamReader sr = new StreamReader(@"C:\Users\admin\Documents\combobox1.txt"))
{
string line3 = sr.ReadLine();
if (line3 != null)
{
sec_combobx.Text = line3;
line3 = sr.ReadLine();
sr.Close();
}
}
}
}>

What I have tried:

i have tried stream reader and writer only one value i.e last combobox value is displayed in notepad

Posted 14-Dec-16 19:14pm

Member 12905429

Updated 16-Dec-16 10:37am

v2

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Comments

Mohamed Rafiq K 15-Dec-16 4:13am

I think you are overwriting the files, thats why you are seeing that last written data.

Richard MacCutchan 15-Dec-16 4:50am

If you do not show us your code we cannot begin to guess what you are doing wrong. Please post proper details of your problem.

hari19113 15-Dec-16 7:19am

You need to check your FileMode in FileStream. Is it in Append mode? If yes and you are still having problem, please post a code snippet.

Ramza360 16-Dec-16 16:34pm

Your problem is you are overwriting your file since you are simply creating a StreamWriter and writing a line, then closing the file. You need to specify a StreamWriter with a FileMode as hari19113 stated. Check my example below.

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Ramza360 · Answer 1 · 2016-12-16T10:37:00

Anywhere you are doing the StreamWriter stuff, change it to the following.

Also, since you're utilizing the using() block, there is no need to close the file, the using block of the streamwriter will close it for you.

C#

private void hrs_combobx_SelectedIndexChanged(object sender, EventArgs e)
{
    if (File.Exists(@"C:\Users\admin\Documents\combobox1.txt"))
    {
          using (StreamWriter sw = new StreamWriter(new FileStream(@"C:\Users\admin\Documents\combobox1.txt", FileMode.Append)))
         {
             sw.WriteLine(hrs_combobx.SelectedItem);
         }
    }
}