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I have to do a for loop and check whether any of the items are checked if I want to know if any of the items are checked.
In C#, there is something like
listbox.SelectedItems.Count();
Is there any similar method for ASP.NET?
387
To determine the items that are selected, you can use the Selected property of the list box. The Selected property of a list box is an array of values where each value is either True (if the item is selected) or False (if the item is not selected).
If you want to obtain the index position of the currently selected item in the ListBox, use the SelectedIndex property. In addition, you can use the SelectedIndices property to obtain all the selected indexes in a multiple-selection ListBox.
You can use the ListBox. GetSelectedIndices method and loop over the results, then access each one via the items collection. Alternately, you can loop through all the items and check their Selected property.
GetSelected(Int32) Method.
you can see whether any item is selected by the below code:
if (listboxname.SelectedIndex == -1)
MessageBox.Show("Please select an Item first!");
Looks like you'll need to loop through them.
37
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