How do I dump a specific column to the csv

Question

1.00/5 (2 votes)

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I saw this code example which allows for dumping listview to csv.

C#

private void Button1_Click(object sender, EventArgs e) 
        { 
             
            //declare new SaveFileDialog + set it's initial properties 
 
            { 
                SaveFileDialog sfd = new SaveFileDialog { 
                    Title = "Choose file to save to", 
                    FileName = "example.csv", 
                    Filter = "CSV (*.csv)|*.csv", 
                    FilterIndex = 0, 
                    InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments) 
                }; 
 
                //show the dialog + display the results in a msgbox unless cancelled 
 
 
                if (sfd.ShowDialog() == DialogResult.OK) { 
                     
                    string[] headers = ListView1.Columns 
                               .OfType<ColumnHeader>() 
                               .Select(header => header.Text.Trim()) 
                               .ToArray(); 
 
                    string[][] items = ListView1.Items 
                                .OfType<ListViewItem>() 
                                .Select(lvi => lvi.SubItems 
                                    .OfType<ListViewItem.ListViewSubItem>() 
                                    .Select(si => si.Text).ToArray()).ToArray(); 
 
                    string table = string.Join(",", headers) + Environment.NewLine; 
                    foreach (string[] a in items) 
                    { 
                        //a = a_loopVariable; 
                        table += string.Join(",", a) + Environment.NewLine; 
                    } 
                    table = table.TrimEnd('\r', '\n'); 
                    System.IO.File.WriteAllText(sfd.FileName, table); 
 
                } 
            } 
  
        }

But how could I use it to dump a specific column. I have tried different variation of modifying the code by commenting out or changing a few lines, but it either does nothing or just throws more errors.

Posted 16-Jun-15 0:24am

Herboren

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Comments

Ralf Meier 16-Jun-15 8:50am

In this case you have to access the specific Item or the specific Item-Index.
Could you give an example to where you want to get ?

Herboren 16-Jun-15 14:16pm

My listview contains the first item and then 6 sub-items following it. There is about 7 rows in the third column which is what I need to dump to a csv

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Herboren · Accepted Answer · 2015-06-16T10:46:00

I fixed it:

C#

string[] apString = new string[lstvResults.Items.Count];
            if (dlgExportFile.ShowDialog() == DialogResult.OK)
            { 
                
                // Count Row Indicies
                for (int i = 0; i < lstvResults.Items.Count-1; i++)
                {
                    // Get Row Index
                    ListViewItem Col_Get = lstvResults.Items[i];    

                    // Element in Array Gets MD5 SubItem
                    apString[i] = Col_Get.SubItems[2].Text;    
                }
            }
            string join = string.Join(",\n", apString);
            join = join.TrimEnd('\r');
            System.IO.File.WriteAllText(dlgExportFile.FileName, join);