Getting at values in a list box

Glenn Patton

Hi All,

Simple question I have up loaded information to a list box using the below code

List drivers = GetDriverInfo();

foreach (SignedDriver driver in drivers)

listBox1.Items.Add(driver.DeviceName+","+driver.DriverDate+","+driver.DriverVersion);

this displays the data, I want to check DeviceName & DriverVersion against some values however I can be sure of the exact location (on my PC it's 29 for the correct entry in the collection) however I can't garuntee it on another (Other PC's, Netbooks, Tablets etc.) so I want to be dynamic

private void button6_Click(object sender, EventArgs e)

{

int index = -1;

//USB Serial Converter 2.8.24.0

index = listBox1.FindString("2.8.24.0");

MessageBox.Show("index = " + index.ToString());

}
while I know there are multiple enteries with this in the messagebox gives -1 not the at least 2 I was expecting. I having been fighting the code too long today!

Glenn

2 Replies

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

Vulpes14y ago
Accepted answer
Well, the FindString() method finds the index of the first item in the ListBox which begins with the string passed to the method.

It looks to me like 2.8.24.0 is a version number rather than a device name in which case the method won't find it and return -1.
Glenn Patton14y ago
Thanks for that, a nights sleep and I solved it at home, got to work read your reply and thought why didn't I didn't get it!

Thanks Glenn
My solution:
int index = -1;
//USB Serial Converter,20120410000000.******+***,2.8.24.0
index = listBox1.FindString("USB Serial Converter,20120410000000.******+***,2.8.24.0");
MessageBox.Show("index = " + index.ToString()+","+listBox1.Items[20].ToString());