I have a pretty simple form with a listbox, a text box, and two buttons.
The list box items are populated from a sql database table. The user may chose to select one or multiple items from the listbox.
The text box is used to write more details about the items in the listbox. One button can then be clicked to update another database table with these details.
I want to make it where if any items are selected from the listbox, those contents are automatically copied into the text box field on the fly as they are selected.
Is this possible?
I've been able to make this happen on the button click event - just not on the fly as they are selected. I want it to occur before the additional details are being sent to the database
I've also tried using several different listbox events, but have been unable to obtain the results I am looking for.
Any suggestions?
try this out
you will have to handle the SelectedIndexChanged event on the listbox.
here is an example with example controls.
private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
{
textBox1.Text = "";
foreach (string nextitem in listBox1.SelectedItems)
{
textBox1.Text += nextitem + " ";
}
}
im not too sure HOW you want the text to appear in the textbox so that would be up to you in the foreach loop.
yes, the SelectedIndexChanged event fires on every selection change, and you can concatenate together the items in the listbox. But if you are talking the description that's not visible too, you need to store the description in each listboxitem tag property, and in your code retrieve the description from there.
Related
I am using Objectlistview in my WFA to create a chekedlistbox.
I want to have a button called "Select all" that the user can click on it and all the rows are selected just by one click.
I have been using the following code which works and all the checkboxes will be selected
private void btnSelectallModule_Click(object sender, EventArgs e)
{
foreach (ListViewItem item in dataListView1.Items)
{
item.Checked = true;
}
}
The problem is that when I check all the items using this button then I hover over each item it will be unchecked automatically without even clicking on that item, which is so weird because I did not intend to do that in the code.
Does anyone know what is going on and how can I fix this?
Thanks
In general do NOT manipulate the ListViewItem objects when working with ObjectListView.
There is a Method dataListView1.CheckAll() that will do exactly what you are trying to do - check all items. Using that method will properly set the internal check states of the OLV control and prevent them from getting visually unchecked when the view refreshes (when hovering the mouse over items).
I'm trying to create a windows form application to keep track of a bunch of 'things' (it doesn't really matter what).
These things are represented as items in a ListView, with their properties (real-world properties) being sub-items. I also have a few labels.
I need a way to get these labels to change to the text of the SubItems so that when an item in the ListView is selected, the labels all update to their respective SubItem text.
How do I tell the labels where to find the SubItem text? And how can I get them to change to the SubItems of a different ListView item when it is selected?
Use the SelectedIndexChanged event to know when the selection has changed, then just map subitem text to the labels:
private void lv_SelectedIndexChanged(object sender, EventArgs e)
{
label1.Text = lv.SelectedItems[0].SubItems[0].Text;
label2.Text = lv.SelectedItems[0].SubItems[1].Text;
label3.Text = lv.SelectedItems[0].SubItems[2].Text;
}
Note that Item[n], SelectedItems[0] and SelectedItems[0].SubItems[0] all refer to the same thing.
I have a RadComboBox that allows for custom searching for about 1500 records. Once one is selected the User control changes accordingly. If I were to want to select a new record, the selected record is the only record that displays and when you type in the search field, nothing is found either.
However, if you select a record, do what you need then click the drop down then click off it then click on it again, it resets itself as desired. How can I make it so the drop down list populates itself on the initial click?
Probably you are losing the datasource.
On the SelectedIndexChange event, you can repopulate the datasoure and set currently selected value from arguments that are passed to this event.
So in a pseudocode it would look like:
procedure OnSelectedIndexChanged(object sender, SelectedIndexChangedEventArgs e)
{
var selectedValue = e.Value;
(sender as RadComboBox).DataSource = YourMethodToGetDatasource();
(sender as RadComboBox).DataBind();
(sender as RadComboBox).SelectedValue = selectedValue;
}
and yes i know currently pseudo code doesn't look so pretty but of course you will need to use the id of your control in place of (sender as RadComboBox).
If someone know a better method for this i would be glad to gain this knowledge :)
I have no idea how to do this.
What I am trying to do is to allow user to copy certain field by using ether right click mouse or keyboard shortcut.
I need this because I am storing some fields as a code which cannot be retyped easily.
ListView allow to select only individual row at the time, and I want to select only one field of the whole table layout.
How do I do this?
PS. Or, how do I allow user to modify the content of each field. At least when they can modify the field they can copy/paste the content (changes will not be saved to my database file).
To allow the user to edit the item, you can set LabelEdit on the ListView to true. Here is the description from MSDN:
"When the LabelEdit property is set to true, the user is able to modify the text of an item by clicking the item text to select it and then clicking the item text again to put the label text into edit mode. The user can then modify or replace the item's text label."
Note that this does not apply to the subitems.
Copying the data out could be slightly more involved depending on the user interface that you desire (i.e. button or context menu). The easy solution would be to add a button to the form that, when pressed, would copy the content of the selected item (or any of its subitems) to the clipboard.
private void button1_Click(object sender, EventArgs e)
{
if (listView1.SelectedItems.Count != 0)
{
Clipboard.SetText(listView1.SelectedItems[0].Text);
}
}
There is some "Clipboard" class
http://msdn.microsoft.com/en-us/library/system.windows.forms.clipboard.aspx
You could simply make a button or something, and set the selected item text in the clipboard.
I have two Comboboxes where the second one is dependent upon the first one.
When the SelectedIndexChanged event of the first Combobox fires then the second Combobox will be enabled.
After the event, the second Combobox is enabled but I cannot select the ComboBox item.
EDIT
I use Dev express Tools
First Combo I load in Page_Load Event
I use Server Side code:
protected void ASPxComboModule_SelectedIndexChanged(object sender, EventArgs e)
{
LoadSecondCombo();
LoadSecondCombo.Focus();
}
There is no problem in loading, but I'm unable to select 2nd combo item.
What do this do: LoadSecondCombo(); I assume it returns an instance of the control. Where does it set combo.Enabled at?
LoadSecondCombo(); LoadSecondCombo.Focus();
look like method that reference your comboBox and Load it.
When you want to focus LoadSecondCombo should ne an instance of Combo Box. I think it is not and so your combo is not selected.
Can you try going back a bit and look at the Id of combo Box (if it in a composit control like DataGrid / View you will have to do a FindControl) and then focus. I mean typing
comboBtn1.Focus();
Now if that works then you know that your control can be found. In that case mofidify the LoadSescondCombo() to return an instance of combo button if it is not doing so already.
then create a reference to that combobutton by
ComboButton cbtn = LoadSecondCombo(); and
cbtn.Focus();