asked on

Listbox selected Item values being populated without the event being fired.

I have a listbox whose list is being populated through a datasource ...That list contains names of some products.when the list is being populated control goes to the first name on the list ....and without even selecting the first name its popping up the details of that name. What should I do so that the control does not directly go to the first name on the list and select its details?
Only when the user selects the item it should pop up otherwise the information should not be displayed.

Thanks!

Here goes my sample code

//Populating List Box with productNames
        private List<UserData.ProductsRegistered> proreg;
 
        private void ProductsRegistered(string UserName, string productID,string Name)
        {
            proreg =userdata.GetRegisteredProducts(UserName, productID,Name);
 
            listBox1.DataSource = proreg;
            listBox1.DisplayMember = Name;
            listBox1.SelectedIndexChanged += new EventHandler(listBox1_SelectedIndexChanged);
                                         
        }
 
        //selecting individual items in a list box
 
 
        private void listBox1_SelectedIndexChanged(object sender, System.EventArgs e)
        {
            // Get the currently selected item in the ListBox.
 
            string Name = "";
            // Name= listBox1.SelectedItem.ToString();
            // string Name = listBox1.SelectedItem.ToString();
            string UserId = "";
            string SerialNumber = "";
            string UserName = "";
            string ProductId = "";
 
 
            //populate the product Name and load the listbox with all values
            if (null != listBox1.SelectedItem)
            {
 
                Name = listBox1.SelectedItem.ToString();
 
                UserData.Name info = userdata.GetInfoName(UserName, Name);
                ProductId = info.ProductId;
 
                UserData.UID ui = userdata.GetUserID(ProductId);
                UserId = ui.UserId;
 
                UserData.LicenseInfo LInfo = userdata.GetNameInfo(UserId, ProductId, Name);
                SerialNumber = LInfo.SerialNumber;
 
                int _count = listBox1.Items.Count;
                if (_count != 0)
                {
                    for (int i = 0; i < _count; i++)
                    {
                        if ((listBox1.GetSelected(i)))
                        {
                            MessageBox.Show("Serial No:= " + SerialNumber.ToString() + "UserID:= " + UserId.ToString(), "LicenseInfo");
 
                        }
                    }
                }
            }
            //If listbox values to be cleared.
            else
            {
                listBox1.Items.Clear();
            }
        }

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p_davis

listBox1.SelectedIndex = -1

onebite2

ASKER

Where should I put this???????

Thanks!

onebite2

ASKER

I mean where should this line of code be embedded in my code ?can you please tell me?

Thanks in advance!

p_davis

if you want it to blank on the form load event then you would want to place it at the end of the initialization of all of your controls and the binding of your datasource to the list

p_davis

i don't know where your productsregistered function is called from but you should be able to put it

private void ProductsRegistered(string UserName, string productID,string Name)
        {
            proreg =userdata.GetRegisteredProducts(UserName, productID,Name);
 
            listBox1.DataSource = proreg;
            listBox1.DisplayMember = Name;
            listBox1.SelectedIndexChanged += new EventHandler(listBox1_SelectedIndexChanged);
 
//HERE
listBox1.SelectedIndex = -1;
                                         
        }

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onebite2

ASKER

When I put the listBox1.SelectedIndex = -1; at the place where u pointed out it throws me an exception when I want to clear the values in the list box.........

Products Registered function is initialised with the list to poulate values and called down as another function.......
private List<UserData.ProductsRegistered> proreg;

private void ProductsRegistered(string UserName, string productID,string Name)
{
proreg =userdata.GetRegisteredProducts(UserName, productID,Name);

listBox1.DataSource = proreg;
listBox1.DisplayMember = Name;
listBox1.SelectedIndexChanged += new EventHandler(listBox1_SelectedIndexChanged);

}

Help to find a work around !

onebite2

ASKER

I got the work around to do it ...thanks a lot!I appreciate!

p_davis

i don't completely understand the clear list items if your selected item is null but this will account for the -1 index

 else
{
   if(listBox1.SelectedIndex > -1)
    listBox1.Items.Clear();
}

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p_davis

oh -- didn't see the refresh.--

good, and you're welcome

onebite2

ASKER

I am sorry the problem is still existing................I thought it worked around but no....its still there...

See i have a datagridview when I select on one row listbox values are populated and this listbox1.selectedindec=-1 worked but if I select the next row....its not working again its getting higlighted...............

Please help!

ASKER CERTIFIED SOLUTION

p_davis

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