This is how I currently add info to my listview:
private void toolStripMenuItem2_Click(object sender, EventArgs e)
{
int totItems = Seq3.Count - 1;
if (PercentPopTolerance1.Count - 1 > totItems) totItems = PercentPopTolerance1.Count - 1;
for (int i = 0; i <= totItems; i++)
{
ListViewItem lvi = new ListViewItem();
string item1 = "";
string item2 = "";
if (Seq3.Count - 1 >= i) item1 = Seq3[i].ToString();
if (PercentPopTolerance1.Count - 1 >= i) item2 = PercentPopTolerance1[i].ToString();
lvi.SubItems.Add(item1);
lvi.SubItems.Add(item2);
listView2.Items.Add(lvi);
}
}
View of empty listview:
Now how would I clear the contents of any particular column? Say I want to add to column YYMM but before I do this, I want to clear that particular column. How would this be done?
You can clear column values like this
var items = listView1.Items;
foreach (ListViewItem item in items)
{
a.SubItems["YYWW"].Text = "";
}
You should specify a column by its name (a column corresponds to a subitem in a ListViewItem), note that this Name is not ColumnHeader.Name, I mean the corresponding ListViewSubItem.Name:
public void ClearColumn(string colName){
foreach(ListViewItem item in listView1.Items){
var cell = item.SubItems[colName];
if(cell != null) cell.Text = "";
}
}
The following code will work for ColumnHeader.Name passed in instead of ListViewSubItem.Name as the code above does:
public void ClearColumn(string columnHeaderName){
int i = listView1.Columns.IndexOfKey(columnHeaderName);
if(i == -1) return;
foreach(ListViewItem item in listView1.Items){
item.SubItems[i].Text = "";
}
}
You can try the following code to make it work for Text instead of Name:
public void ClearColumn(string colText){
if(listView1.Items.Count == 0) return;
var col = listView1.Columns.Cast<ColumnHeader>()
.Select((x,i)=>new{x,i})
.FirstOrDefault(a=>a.x.Text == colText);
if(col == null) return;
foreach(ListViewItem item in listView1.Items){
item.SubItems[col.i].Text = "";
}
}
Related
I want to add item into the listview, the problem I'm facing is that when I add an item that I type in on the text box. It is able to insert the value in the listview column that I want. But when it update, all the data that it loaded from the textfile is missing. Only the value that I type in is left.
Before add data:
http://www.hostpic.org/images/1508121529460086.png
After insert the data:
http://www.hostpic.org/images/1508121531010086.png
private void button2_Click(object sender, EventArgs e)
{
//add button
string s;
listView1.Items.Clear();
listView1.BeginUpdate();
for (int i = 0; i < comboBox1.Items.Count; i++)
{
if ((comboBox1.SelectedIndex + 1) + "" == proDetail[i].id)
{
//proDetail[i].estimation = double.Parse(textBox3.Text);
proDetail[i].estimation = textBox3.Text;
s = textBox4.Text;
proDetail[i].pre = s.Split(',');
}
}
for (int j = 0; j < comboBox1.Items.Count; j++)
{
if (proDetail[j].pre != null)
{
project = listView1.Items.Add(proDetail[j].id);
project.SubItems.Add(proDetail[j].activity);
if (proDetail[j].pre.Length <= 1)
{
foreach (string words in proDetail[j].pre)
{
preValue = words;
}
}
else
{
preValue = string.Empty;
foreach (string words in proDetail[j].pre)
{
preValue += words + ",";
}
}
project.SubItems.Add(proDetail[j].estimation.ToString());
project.SubItems.Add(preValue);
}
else
{
project = listView1.Items.Add(proDetail[j].id);
project.SubItems.Add(proDetail[j].activity);
}
listView1.EndUpdate();
listView1.Refresh();
}
}
I forgot to include the
project.SubItems.Add(proDetail[j].estimation);
in the else statement.
Thanks for the help.
This is the culprit:
listView1.Items.Clear();
That has removed all existing items from the control.
I have this two list-box In that first list-box is fill on Combo-box Selected index changed, so List-box 1 is Bounded. Now when I press the > button all selected item in List-box 1 is display in List-box 2.
But instead of Names, I get System.Data.DataRowView
so my question is I want Names instead of this System.Data.DataRowView
my code is this
private void btnSelect1ItemFrom_Click(object sender, EventArgs e)
{
if (listBoxSelectToLedger.Items.Count > 0)
{
for (int i = 0; listBoxSelectToLedger.Items.Count > i; )
{
listBoxSelectToLedger.Items.Remove(listBoxSelectToLedger.Items[i].ToString());
}
}
if (listBoxSelectFromLedger.SelectedItem != null)
{
** for (int i = 0; i < listBoxSelectFromLedger.SelectedItems.Count; i++)
{
listBoxSelectToLedger.Items.Add(listBoxSelectFromLedger.SelectedItems[i].ToString());
} **
}
else
{
MessageBox.Show("No item Selected");
}
* I think I am some where Wrong in Second IF Condition in my Code *
Plz Help me
Thanks in Advance
Try this...
private void button1_Click(object sender, EventArgs e)
{
if(listBoxFrom.SelectedItems.Count>0)
{
for (int x = listBoxFrom.SelectedIndices.Count - 1; x >= 0; x--)
{
int idx = listBoxFrom.SelectedIndices[x];
listBoxTo.Items.Add(listBoxFrom.Items[idx]);
listBoxFrom.Items.RemoveAt(idx);
}
}
}
Hiii.. Deep, use the below code to add ListItem.
foreach (ListItem LI in listBoxFrom.Items)
{
if (LI.Selected)
listBoxTo.Items.Add(LI);
}
To add in to 2nd listbox and remove that from the first listbox you can use below code:
int[] indices = listBoxFrom.GetSelectedIndices();
for (int i = indices.Length - 1; i >= 0; i--)
{
ListItem LI = listBoxFrom.Items[indices[i]];
listBoxTo.Items.Add(LI);
listBoxFrom.Items.RemoveAt(indices[i]);
}
put your No items selected message where you require.
I got answer of my own question.
i have to set my DataRowView object
if (listBoxSelectToLedger.Items.Count > 0)
{
for (int i = 0; listBoxSelectToLedger.Items.Count > i; i = 0)
{
listBoxSelectToLedger.Items.Remove(listBoxSelectToLedger.Items[i].ToString());
}
}
if (listBoxSelectFromLedger.SelectedItem != null)
{
foreach (DataRowView objDataRowView in listBoxSelectFromLedger.SelectedItems)
{
listBoxSelectToLedger.Items.Add(objDataRowView["item_name"].ToString());
}
}
else
{
MessageBox.Show("No Item selected");
}
When I select a particular item in ListView item, I am able to display that particular item, and when the form loads I am getting the last item displayed by default (say the 10th item). However, what I want is to display the first item by default. How can I do this? I tried to do something like
listView1.Items[1].Selected = true;
but it's not working:
public partial class GroupExmStart : Form
{
string[] totDisplayQsn = null;
string[] QAndA = null;
string[] words = null;
private List<Question> questions;
ListViewItem lvi;
public GroupExmStart(string GroupName, string DurationID)
{
InitializeComponent();
this.GrpID=GroupName;
TopiID=db.GetTopicIDForGroup(GrpID);
string[] conf = db.GetConfiguration(Convert.ToInt16(DurationID)).Split('|');
Question qsn = new Question();
questions = qsn.Foo(TopiID, conf);
int z = Quiz(questions);
totQsn = Convert.ToInt16(conf[0]);
for (int kk = 1; kk <= totQsn; kk++)//using this I am adding items to listview
{
lvi = new ListViewItem();
lvi.Text = kk.ToString();
listView1.Items.Add(lvi);
}
totDisplayQsn = new string[totQsn + 1];
}
int Quiz(List<Question> questions)//using this I a passing set of questions to be displayed
{
foreach (Question question in questions)
{
DisplayQuestion(question);
}
return 0;
}
private void DisplayQuestion(Question question)//using this i am displaying questions
{
string Q = question.Text;
label5.Text = Q;
string OP1 = question.Option1;
string OP2 = question.Option2;
string OP3 = question.Option3;
string OP4 = question.Option4;
radioButton12.Text = OP4;
radioButton11.Text = OP4;
radioButton10.Text = OP4;
radioButton9.Text = OP4;
}
}
private void listView1_MouseClick(object sender, MouseEventArgs e)//using this i am selection particular item and displaying it
{
if (totDisplayQsn.GetLength(0) >= 0)
{
if (listView1.SelectedItems.Count > 0)
{
var q = Convert.ToInt16(listView1.SelectedItems[0].Text);
var selectedQuestion = questions[q-1];
DisplayQuestion(selectedQuestion);
}
}
}
Thanks in advance for any help.
Try this
listView1.SelectedItems[0].Focused = true;
To select the first item, access it by its zero based index. Place the code just after your items initialization code.
for (int kk = 1; kk <= totQsn; kk++)//using this I am adding items to listview
{
lvi = new ListViewItem();
lvi.Selected = false;
lvi.Text = kk.ToString();
listView1.Items.Add(lvi);
}
listView1.Items[0].Selected = true;
DisplayQuestion(questions[0]);
Remove the following code:
int Quiz(List<Question> questions)//using this I a passing set of questions to be displayed
{
foreach (Question question in questions)
{
DisplayQuestion(question);
}
return 0;
}
Ok try the below code:
ListViewItem foundItem = listView1.FindItemWithText("Select4", false, 0, true);
if (foundItem != null)
{
listView1.Items[foundItem.Index].Selected = true;
}
That's All.
I have been saving into the ComboBox a value out of the selected column in datagridview with below code.
My question is:How can I prevent duplicate records when I save the values into the ComboBox? How can I do that?
Code:
int ColumnIndex = dgUretimListesi.CurrentCell.ColumnIndex;
CmbAra.Text = "";
for (int i = 0; i < dgUretimListesi.Rows.Count; i++)
{
CmbAra.Items.Add(dgUretimListesi.Rows.Cells[ColumnIndex].Value.ToString());
}
Please try this
private void dgvServerList_CellEndEdit(object sender, DataGridViewCellEventArgs e)
{
try
{
if (e.ColumnIndex == 1)
{
string id = dgvServerList[e.ColumnIndex, e.RowIndex].Value.ToString();
int duplicaterow = 0;
for (int row = 0; row < dgvServerList.Rows.Count; row++)
{
if (row != e.RowIndex && id == dgvServerList[e.ColumnIndex, row].Value.ToString())
{
duplicaterow = row + 1;
MessageBox.Show("Duplicate found in the row: " + duplicaterow);
this.dgvServerList[e.ColumnIndex, e.RowIndex].Value = "";
break;
}
}
}
}
catch
{
}
}
you could first transfer your datagridview items to a dictionary (which guarantees uniqueness) and then transfer that dictionary content to the combobox. or you could check for uniqueness yourself using a 'Contains' method on the combobox. you could even tie the dictionary to the combobox as a source for the combobox items.
Dictionary<string,bool> d = new Dictionary<string,bool>();
int ColumnIndex = dgUretimListesi.CurrentCell.ColumnIndex;
CmbAra.Text = "";
for (int i = 0; i < dgUretimListesi.Rows.Count; i++)
{
d[dgUretimListesi.Rows.Cells[ColumnIndex].Value.ToString()] = true;
}
CmbAra.Items.AddRange(d.Keys);
Use a set:
int ColumnIndex = dgUretimListesi.CurrentCell.ColumnIndex;
CmbAra.Text = "";
HashSet<string> set = new HashSet<string>();
for (int i = 0; i < dgUretimListesi.Rows.Count; i++)
{
string s = dgUretimListesi.Rows.Cells[ColumnIndex].Value.ToString();
if(!set.Contains(s)) {
CmbAra.Items.Add(s);
set.Add(s);
}
}
by using the following check and then determine to add or not
if(CmbAra.Items.Contains(dgUretimListesi.Rows.Cells[ColumnIndex].Value.ToString()))
You can use the following code part.
if(!(CmbAra.Items.Contains(dgUretimListesi.Rows.Cells[ColumnIndex].Value.ToString())))
{
CmbAra.Items.Add(dgUretimListesi.Rows.Cells[ColumnIndex].Value.ToString());
}
else
{
MessageBox.Show("Value Already exists , not added");
}
I'm using ListView.GetItemAt(x,y) to retrieve an item from the ListView, but I'm not
able to get the item when I set the FullRowSelect option to false.
I'm not sure of how to do it in .NET 1.1. Does anyone have any pointers?
Here's a code snippet:
public int GetListViewSubItem(ListView listView1, Point pt)
{
const int LVM_FIRST = 0x1000;
const int LVM_GETSUBITEMRECT = (LVM_FIRST + 56);
const int LVIR_BOUNDS = 0;
RECT myrect;
ListViewItem lvitem = listView1.GetItemAt(pt.X, pt.Y);
if(lvitem == null && listView1.SelectedItems.Count > 0)
lvitem = listView1.SelectedItems[0];
int intLVSubItemIndex = -1;
ListViewItem.ListViewSubItem LVSubItem = null;
if(lvitem != null)
{
int intSendMessage;
for ( int i = 1; i <= lvitem.SubItems.Count - 1; i++)
{
LVSubItem = lvitem.SubItems[i];
myrect = new RECT();
myrect.top = i;
myrect.left = LVIR_BOUNDS;
intSendMessage = SendMessage(listView1.Handle,
LVM_GETSUBITEMRECT,
lvitem.Index, ref myrect);
if (pt.X < myrect.left)
{
LVSubItem = lvitem.SubItems[0];
intLVSubItemIndex = 0;
break;
}
else if (pt.X >= myrect.left & pt.X <= myrect.right)
{
intLVSubItemIndex = i;
break;
}
else
LVSubItem = null;
}
}
if (LVSubItem == null || lvitem == null)
{
intLVSubItemIndex = -1;
}
return intLVSubItemIndex;
}
This method is supposed to show me which cell was clicked.
Tt works, but if I change the fullrowselect to false, it returns a null value.
I even tried getitemat(0,e.y), but it didn't work.
whenever I select an item in the ListView, it highlighted with the color blue, so it is not possible to view what is selected. I'm trying to remove that blue highlight.
Any thoughts?
Can you elaborate a bit on what you're trying to do?
Is your ListView's ViewStyle set to Details? Since you mention setting FullRowSelect to false I assume it is.
GetItemAt(x, y) will only work if the mouse was clicked on actual text that belongs to an item. So if you've clicked on the same row as an item but in a column that it doesn't have text for, it'll return null.
A workaround for this is to simply pass 0 in as the x parameter:
private void listView1_MouseUp(object sender, MouseEventArgs e)
{
ListViewItem item = listView1.GetItemAt(0, e.Y);
if (item == null)
{
MessageBox.Show("Null");
}
else
{
MessageBox.Show(item.Text);
}
}
I can confirm that this works fine - it returns the item that lives on that row even if only the first column has text in it.
private int getSelectedSubItemIndex(ListView listView)
{
if (listView.SelectedItems.Count == 1)
{
int x = 0;
ListViewItem item = listView.SelectedItems[0];
Point pt = listView.PointToClient(Control.MousePosition);
for (int idx = 0; idx < item.SubItems.Count; ++idx)
{
x += listView.Columns[idx].Width;
if (pt.X < x)
return idx;
}
}
return -1;
}
private void listView1_MouseClick(object sender, MouseEventArgs e)
{
int column = 0;
ListViewItem item = listView1.GetItemAt(e.X, e.Y);
for (column = 0; column < item.SubItems.Count; column++)
{
if (item.SubItems[column].Bounds.X > e.X) break;
}
if (item != null)
{
textBox1.Text = item.SubItems[column-1].Text;
}
}