Tag problem c# listbox

» chash » Tag problem c# listbox

By : user3856288

Date : January 02 2021, 06:48 AM

it fixes the issue Poppy you are adding title to listBox1.Items.
title is of type string.

code :

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asp.net listbox problem

By : user1107220

Date : March 29 2020, 07:55 AM

This might help you foreach (Book b in o.list) { ListBox_Items.Items.Add(b.Title); } , Add AutoPostBack="True" in your aspx tag

ListBox problem in ASP.NET

By : user2202195

Date : March 29 2020, 07:55 AM

This might help you No jQuery involved, but all the swapping takes place on the client, any moved item will still be moved after a postback.

code :

<select id="ListBox1" name="ListBox1" runat="server" size="5" >
<option>1</option>
<option>2</option>
<option>3</option>
<option>4</option>
<option>5</option>
</select>
<br />
<input class="button" onclick="moveSelectedItems(document.getElementById('ListBox1'), document.getElementById('ListBox2'));"                                         type="button" value="<"/>&nbsp;<br/>
<input class="button" onclick="moveSelectedItems(document.getElementById('ListBox2'), document.getElementById('ListBox1'));"                                         type="button" value=">"/><br/>
<select id="ListBox2" name="ListBox2" runat="server" size="5">
<option>a</option>
<option>b</option>
<option>c</option>
<option>d</option>
<option>e</option>
</select>
<asp:HiddenField runat="server" ID="ListOneHiddenField" />
<asp:HiddenField runat="server" ID="ListTwoHiddenField" />

<script type="text/javascript">
function moveSelectedItems(oListFrom, oListTo) 
{
        var oNewOption;

        // Move the item from one list to another
        oNewOption = document.createElement("OPTION");
        oListTo.options.add(oNewOption);
        oNewOption.innerText = oListFrom.options(oListFrom.selectedIndex).innerText;
        oNewOption.value = oListFrom.options(oListFrom.selectedIndex).value;
        oListFrom.options.remove(oListFrom.selectedIndex);

        // Persist the pipe-separated set of items in each listbox to a hidden field
        document.getElementById('ListOneHiddenField').value = "";

        for (var j = 0; j < document.getElementById('ListBox1').options.length; j++)
            document.getElementById('ListOneHiddenField').value += document.getElementById('ListBox1').options(j).value + "|";

        document.getElementById('ListTwoHiddenField').value = "";

        for (var j = 0; j < document.getElementById('ListBox2').options.length; j++)
            document.getElementById('ListTwoHiddenField').value += document.getElementById('ListBox2').options(j).value + "|";
}
</script>


protected void Page_Load(object sender, EventArgs e)
{
    string[] listItems;

    if (IsPostBack)
    {
        // Clear the ListBox
        ListBox1.Items.Clear();

        // Split the set of items into an array
        listItems = ListOneHiddenField.Value.Split("|".ToCharArray());

        // Rebuild the set of list items
        foreach (string listItem in listItems)
        {
            if (!string.IsNullOrEmpty(listItem))
            {
                ListBox1.Items.Add(new ListItem(listItem, listItem));
            }
        }

        // Rinse and repeat
        ListBox2.Items.Clear();

        listItems = ListTwoHiddenField.Value.Split("|".ToCharArray());

        foreach (string listItem in listItems)
        {
            if (!string.IsNullOrEmpty(listItem))
            {
                ListBox2.Items.Add(new ListItem(listItem, listItem));
            }
        }
    }
}

WPF Listbox Selection problem

By : user3484907

Date : March 29 2020, 07:55 AM

I hope this helps . That is a known issue, as all those strings are the same the selection gets confused because they all are essentially the same object. If you create two identical strings in .NET it does not necessarily create a new one but may reuse the first instance, i am not an expert on this though.
Either wrap the strings in a class (make them the Content of a ListBoxItem for example) or make sure the values are unique.

How to fix "bad listbox index" problem in Listbox.curselection() , tkinter ,Python?

By : Oliver Osted Nielsen

Date : March 29 2020, 07:55 AM

I wish this help you I'm trying to get the selection of a Listbox, as soon as someone select a selection. I'm using some codes like: , Just add exportselection=False to the listbox config.

code :

audioListbox = tk.Listbox(window,exportselection=False)

Problem with C#, Listbox and GUI

By : user3820906

Date : March 29 2020, 07:55 AM

wish help you to fix your issue You need to put the long running operation on it's own thread. then report the progress back to the UI intermittently.
You can see an example how to do this in another post of mine here.