How to filter lines in textbox

I have three radio buttons. When i press every button the text in textbox should get filtered according to that.

for example: if lastlog radio button is clicked only last 5 lines should appear

if lastfiveradio button is clicked only last 25 lines should appear

How can i do that?

if (lastlogradio.Checked == true)

{

StreamReader objstream = new StreamReader(listBox1.Items[listBox1.SelectedIndex].ToString());

resulttxtbox.Text = objstream.ReadToEnd();

}

else if (lastfiveradio.Checked == true)

{

StreamReader objstream = new StreamReader(listBox1.Items[listBox1.SelectedIndex].ToString());

resulttxtbox.Text = objstream.ReadToEnd();

}

else if (alllogsradio.Checked == true)

{

StreamReader objstream = new StreamReader(listBox1.Items[listBox1.SelectedIndex].ToString());

resulttxtbox.Text = objstream.ReadToEnd();

}

2 Replies

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Sabari Prabu11y ago
No Rahul my application doesn't need any listbox
Rahul Bansal11y ago
if you are binding the data from the database in to listbox then you can execute the query with where clause on basis of radio button and get the data then bind it to the listbox