Solved

Save and load content of listview to file.

Posted on 2010-11-21
7
690 Views
Last Modified: 2013-12-17
Hi,

I have the methode for saving the content of a listview to file.
But I don't have the methode for loading the file to listview.

Who can help me?

Peter

private void button3_Click(object sender, EventArgs e)
        {
            TextWriter tw = new StreamWriter("Data\\Glucose.sav");
            StringBuilder listViewContent = new StringBuilder();
            for (int item = 0; item < this.lstvGlucose.Items.Count; item++)
            {
                for (int subitem = 0;
                   subitem < this.lstvGlucose.Columns.Count;
                   subitem++)
                {
                    listViewContent.Append
                    (this.lstvGlucose.Items[item].SubItems[subitem].Text);
                    if (subitem < this.lstvGlucose.Columns.Count - 1)
                        listViewContent.Append(",");
                }
                tw.WriteLine(listViewContent);
                listViewContent = new StringBuilder();
            }
            tw.Close();
        }

Open in new window

0
Comment
Question by:peterkiers
  • 4
  • 3
7 Comments
 
LVL 3

Expert Comment

by:abdkhlaif
ID: 34182859
are you converting the contents of the listview into aaa,bbb,ccc then saving the result to a file?
if so, here is an easy way to save then load the contents using String.Split method:
this code is for a single-column listview but it can work for multiple columns with few changes
// saving:
StringBuilder listViewContent = new StringBuilder();
foreach (ListViewItem item in listView1.Items)
	listViewContent.Append(item.Text + ",");

if(listViewContent.Length > 0) 
	listViewContent.Length = listViewContent.Length - 1; // remove the comma at the end

File.WriteAllText("Data\\Glucose.sav", listViewContent.ToString());

// loading:
string savedContents = File.ReadAllText("Data\\Glucose.sav");

ListView.ListViewItemCollection ls = new ListView.ListViewItemCollection(listView1); // gets the listview contents as a collection
ls.Clear();

foreach (string s in savedContents.Split(','))
	ls.Add(s);

Open in new window

0
 
LVL 1

Author Comment

by:peterkiers
ID: 34182863
Hi, abdkhlaif.
I rather stick to my code. Because now I have the saving part working OK.
Only I am missing the loading part.

greetings, Peter Kiers
0
 
LVL 3

Accepted Solution

by:
abdkhlaif earned 500 total points
ID: 34182937
you can still use the String.Split to convert a comma seperated values into a string array.
use this code for loading:

assuming that:
contents of file Data\\Glucose.sav:
a1,a2,a3,a4
b1,b2,b3,b4
c1,c2,c3,c4

and the listview has 4 columns
int rowcount = 0;
foreach (string line in File.ReadAllLines("Data\\Glucose.sav"))
{
	string[] items = line.Split(','); // convert line into a string array
	listView1.Items.Add(items[0]); // add row

	for (int i = 1; i < items.Length; i++) // skip the first item because its already added
		listView1.Items[rowcount].SubItems.Add(items[i]);
	rowcount++;
}

Open in new window

0
Master Your Team's Linux and Cloud Stack

Come see why top tech companies like Mailchimp and Media Temple use Linux Academy to build their employee training programs.

 
LVL 1

Author Comment

by:peterkiers
ID: 34183102
My save methode uses a delimeter too.
P.
0
 
LVL 1

Author Comment

by:peterkiers
ID: 34183103
I just want the loading part of it.

Greetings, Peter Kiers
0
 
LVL 3

Expert Comment

by:abdkhlaif
ID: 34183106
the code in my last comment is for loading only
0
 
LVL 1

Author Comment

by:peterkiers
ID: 34183172
Oke. Thanks.

Peter
0

Featured Post

Master Your Team's Linux and Cloud Stack

Come see why top tech companies like Mailchimp and Media Temple use Linux Academy to build their employee training programs.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

More often than not, we developers are confronted with a need: a need to make some kind of magic happen via code. Whether it is for a client, for the boss, or for our own personal projects, the need must be satisfied. Most of the time, the Framework…
Entity Framework is a powerful tool to help you interact with the DataBase but still doesn't help much when we have a Stored Procedure that returns more than one resultset. The solution takes some of out-of-the-box thinking; read on!
Nobody understands Phishing better than an anti-spam company. That’s why we are providing Phishing Awareness Training to our customers. According to a report by Verizon, only 3% of targeted users report malicious emails to management. With compan…
The Email Laundry PDF encryption service allows companies to send confidential encrypted  emails to anybody. The PDF document can also contain attachments that are embedded in the encrypted PDF. The password is randomly generated by The Email Laundr…

830 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question