ListBox Adding and Removing an Item in C#

Submitted by donbermoy on Tuesday, July 15, 2014 - 23:07.

ListBox is a control that displays a collection of items. More than one item in a ListBox is visible at a time. You can either populate the ListBox control directly, or bind it to a collection of items. In this tutorial, i will discuss some events in ListBox such as adding and removing an item in a ListBox. So, now let's start this tutorial! 1. Let's start with creating a Windows Form Application for this tutorial by following the following steps in Microsoft Visual Studio 2013: Go to File, click New Project, and choose Windows Application. 2. Next, add one TextBox named TextBox1 which will be used as an input for inputting the names of a school. Add one ListBox named ListBox1 which will be used as a container to display the inputted schools in TextBox1. Add also two Buttons named Button1 labeled "Add" for adding items in the ComboBox and Button2 labeled "Remove" for removing the selected item in the ListBox. You must design your interface like this: output

3. Now, put this code in Button1_Click. This will trigger to add an item on the ListBox as we input a school in TextBox.

                public void Button1_Click(System.Object sender, System.EventArgs e)
                {
                        ListBox1.Items.Add(TextBox1.Text);
                        TextBox1.Clear();
                }

Explanation:

For adding an item in the ListBox, we simply type this syntax ListBox1.Items.Add. The ListBox provides features that enable you to efficiently add items to the ListBox as we input a school on our TextBox. Then it will display the inputted string in our ListBox.

Output:

4. Now add this code for Button2_Click. This will remove the item you have selected in the ListBox. Note that you must put first your cursor in your selected item in the ListBox.

                public void Button2_Click(System.Object sender, System.EventArgs e)
                {
                        ListBox1.Items.Remove(ListBox1.SelectedItem);
                        TextBox1.Clear();
                }

Explanation:

For removing an item in the ListBox, we simply type this syntax ListBox1.Items.Remove(ListBox1.SelectedItem). The ListBox1.SelectedItem here was an action to select or click an item in the ComboBox before clicking the remove button. Then it will clear the your TextBox.

Output:

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