Delete Multiple items from Listbox in ASP.NET

[sonia.sardana]

I try the foll. code---
protected void Button1_Click(o bject sender, EventArgs e)
{
int i;
for (i = 0; i <= ListBox1.Items. Count - 1; i++)
{
ListBox1.Items. Remove(ListBox1 .SelectedValue. ToString());
}

}

But it's not working.

[ShadowLocke]

If your wanting to remove all the items with this loop you need to replace

ListBox1.Items.Remove(ListBox1.SelectedValue.ToString());

with

ListBox1.Items.Remove(ListBox1.Items[i]);

If your only wanting to replace the selected items you need to replace

for (i = 0; i <= ListBox1.Items.Count - 1; i++)

with

for (i = 0; i <= ListBox1.SelectedItems.Count - 1; i++)

and

ListBox1.Items.Remove(ListBox1.SelectedValue.ToString());

with

ListBox1.Items.Remove(ListBox1.SelectedItems[i]);

I try the foll. code---
protected void Button1_Click(o bject sender, EventArgs e)
{
int i;
for (i = 0; i <= ListBox1.Items. Count - 1; i++)
{
ListBox1.Items. Remove(ListBox1 .SelectedValue. ToString());
}

}

But it's not working.

[sonia.sardana]

Hi to remove all the items--
listbox1.items. clear();

Code given by you to remove selected Items is not working.

[Sick0Fant]

Are you trying to delete the selected items? If so, check out the SelectedItems property.

Also, since you are deleting on each iteration, you cannot go forward, since deleting from the front makes all the items indeces decrease. To fix that, either iterate for the number of items, deleting the 0th element on each iteration, or else start from the back and decrement, each time deleting the ith element.

You also might want to use the foreach loop, as it implicitly iterates until the collection is out of elements.

foreach(object Item in listBox1.SelectedItems)
{
     this.listBox1.Items.Remove(Item);
}

[sonia.sardana]

hey frnds, there is no SelectedItems Property in ASP.Net, y al u r replying SelectedItems Property,IN ASP there is either SelectedItem ya SelectedValue Property.

[Sick0Fant]

hey frnds, there is no SelectedItems Property in ASP.Net, y al u r replying SelectedItems Property,IN ASP there is either SelectedItem ya SelectedValue Property.

Oh, I'm sorry. I forgot that this was ASP. Try:

while (this.ListBox1.SelectedItem != null )
{
    this.ListBox1.Items.Remove(this.ListBox1.SelectedItem);
}

[malav123]

Hi Sonia,


Tell exact requirement of your project... if u want to move all the items of listbox then use following code which will allows u to move all the items from one list box to another.. and by editing this code u can also just removes the items of particular listbox....

if(id=="ctl00_ContentPlaceHolder1_TabAddCompany_TabPanel1_btnnextall")
    {        
        if(lstavailablestate.length < 1) 
        {
              alert('There are no items in the source ListBox');
              return false;
        }
        var i = 0;        
        for (i = 0; i <= lstavailablestate.length -1 ; i++)
        {
            var len = lstassociatedstate.length++;            
            lstassociatedstate.options[len].text = lstavailablestate.options[i].text;                
            lstassociatedstate.options[len].value = lstavailablestate.options[i].value;
            hid = hid + lstavailablestate.options[i].value + ",";
        }       
        for(var i=(lstavailablestate.options.length-1); i>=0; i--)
        {
                lstavailablestate.options[i] = null;
        } 
               
     }

[malav123]

And ya i have write the code at client side that is in javascript....