We Keep Coding

C# How to get the subitem on a listview to stay on the same line as the item?

So I have the following code:
listView1.Items.Add("Test");
ListViewItem testing = new ListViewItem();
testing.SubItems.Add("Test2");
listView.Items.Add(testing);
And here's what it produces:
(source: gyazo.com)
Not sure why the "Test2" goes at the bottom.

First of all Both list view are same listView1 and listView?
If yes then here is the Answer:
listView1.Items.Add("Test");
while wrting this line of code you are adding first item in List view with main item "Test" and all subitems empty.
listView.Items.Add(testing);
After doing this you are adding second item in the list view with main item Empty and first subitem as "Test2"
To add one item in listView with subitem try this:
ListViewItem testing = new ListViewItem();
testing.Text="Test";
testing.SubItems.Add("Test2");
listView.Items.Add(testing);

Inserting SubItems to ListView On C#

Hello,
I have 3 Text Boxes and need their text to be inserted into a ListView by their matching columns when a button click event occurs. I tried this:
ListViewItem lvi = new ListViewItem();
lvi.SubItems.Add(textBox3.Text);
lvi.SubItems.Add(textBox4.Text);
lvi.SubItems.Add(textBox5.Text);
Although it doesn't seem to do it. Any suggestions?

You'l have to create a ListViewItem, and then you'l have to add it to your list. For example:
ListViewItem item1 = new ListViewItem();
item1.Content = textBox1.Text;
yourListName.Items.Add(item1); //Or SubItems
Good luck!

Remove numbering in ListView

When I load images into ListView, the numbers appear below the images. How can I remove them?
The following is my code to load images into ListView:
DataTable dtPath = new DataTable();
dtPath = ContrPtMRD.SelectFilePaths(ObjPtMRH);
ImageList myImageList = new ImageList();
lvPtMedicalRecord.LargeImageList = myImageList;
int imageIndex = 0;
foreach (DataRow rows in dtPath.Rows)
{
myImageList.Images.Add(Image.FromFile(rows[2].ToString()));
ListViewItem lvi = new ListViewItem(new string[]{rows[0].ToString(),rows[1].ToString()});
lvi.ImageIndex = imageIndex;
imageIndex++;
lvPtMedicalRecord.Items.Add(lvi);
}

The ListView will not add any image numbers unless you explicitly add them. You are doing so in the following line:
ListViewItem lvi = new ListViewItem(new string[]{rows[0].ToString(),rows[1].ToString()});
and the number seem to be coming from
rows[0].ToString()
Which is the text property of the ListViewItem.
To remove the numbers, replace rows[0].ToString() with an empty string or use one of the ListViewItem's constructors that does not require you to provide the text property:
ListViewItem lvi = new ListViewItem();

Its not clear where are the numbers coming from but I think the numbers are in the first column of your DataTable. If you want to remove the numbers then dont add the first column values to your ListView as Items.
or else
Hide the column in the ListView which you dont want to show.
or else
Change the view of the ListView to large details.(this will not show the item value, only subItems will be visible)

How to add Tag and subitem in listview c#

I want to display tag and subitem in my listview , those items come by using while statement. here the code
int id = 0;
while ((line = sr.ReadLine()) != null)
{
id++;
string[] columns = line.Split(',');
ListViewItem item = new ListViewItem();
item.Tag = id;
item.SubItems.Add(columns[1]);
lv_Transactions.Items.Add(item);
}
subitems cab be displayed but the tag just appear blanks. Someone know to fix this please help me

To make the item have text, which I assume you want to show the 'id', you will want this:
item.Text = id.ToString();
The tag field is ignored by the control, and exists as a way of 'tagging' the source data to a control, so it can be retrieved later on (for example, when processing an event that was trigged by the control).

The Tag property is not displayable. You will need to add the contents of the tag as a subitem or otherwise embed it in the data you are showing to the user.
You have three choices on how to implement this:
1) ListViewItem item = new ListViewItem(id.ToString());
2) item.Text = id.ToString(); (this is effectively the same as 1)
3) item.SubItems(id.ToString()); if you want the id to appear in the list of subitems.
Update
SubItems will only work correctly if you have defined Columns in the ListView and have set the ListView's View to View.Details.
Assuming that you have not done this, the following line:
item.SubItems.Add(columns[1]);
should be modified to be:
item.Text = columns[1];

How can I fill a listview in vertical form?

I have one listview whith several columns.
I want to fill this listview in a vertical form
column to column.

Sorry, but this is not (easily) possible.
A ListView has a list of ListViewItems, where each one has a List of ListViewSubItems (and to make it a little more complex at the first spot, the first ListViewSubItem is the same as the ListViewItem itself).
So if you like to fill up a ListView column by column you first have to add the ListViewItems to the ListView for all the values you want in the first column.
Afterwards you iterate through the ListView.Items and call on every ListViewItem.Subitems.Add to fill up the next column. This must be done for each column you like to fill.
If you like to fill in the column values in another order then from left to right, you should take a look into the DisplayIndex of the ColumnHeader within the ListView.Columns.
Some example code:
// Some values
var someValues = Enumerable.Range(1, 10);
// Fill up the first column
foreach (var item in someValues)
{
listView.Items.Add("0." + item);
}
// Run for each column in the listView (the first is already filled up)
foreach (ColumnHeader column in listView.Columns.Cast<ColumnHeader>().Skip(1))
{
// Get the value and the index for which row the value should be
foreach (var item in someValues.Select((Value, Index) => new { Value, Index }))
{
// Add the value to the given row, thous leading to be added as new column
listView.Items[item.Index].SubItems.Add(column.Index + "." + item.Value);
}
}