Add , Delete and Update In ListBox (C#.net)

The following piece of code shows you how to add , delete and update in listbox.

public void clearTextBoxes()

{

     txtName.Clear();

     txtAge.Clear();

     txtDegree.Clear();

}

private void btnAdd_Click(object sender, EventArgs e)

{

     listName.Items.Add(txtName.Text);

     listAge.Items.Add(txtAge.Text);

     listDegree.Items.Add(txtDegree.Text);

     clearTextBoxes();   

}

// Deleting the selected row from all listboxes

private void btnDelete_Click(object sender, EventArgs e)

{

    int index = listName.SelectedIndex;

 

    listName.Items.RemoveAt(index);

    listAge.Items.RemoveAt(index);

    listDegree.Items.RemoveAt(index);

}

private void btnUpdate_Click(object sender, EventArgs e)

{

           

    if (btnUpdate.Text.Equals("Load"))

    {

         txtName.Text = listName.SelectedItem.ToString();

         txtAge.Text = listAge.SelectedItem.ToString();

         txtDegree.Text = listDegree.SelectedItem.ToString();

               

         listName.Enabled = false;

         listAge.Enabled = false;

         listDegree.Enabled = false;

  

         btnUpdate.Text = "Update";

               

   }

   else

   {

         int index = listName.SelectedIndex;

         listName.Items.Insert(index, txtName.Text);

         index++;

         listName.Items.RemoveAt(index);

         index = listAge.SelectedIndex;

         listAge.Items.Insert(index, txtAge.Text);

         index++;

         listAge.Items.RemoveAt(index);

         index = listDegree.SelectedIndex;

         listDegree.Items.Insert(index, txtDegree.Text);

         index++;

         listDegree.Items.RemoveAt(index);

               

         listName.Enabled = true;

         listAge.Enabled = true;

         listDegree.Enabled = true;

    

         btnUpdate.Text = "Load";

     }

}

// If click on listName then selecting its corresponding listbox row

private void listName_Click(object sender, EventArgs e)

{

       int index = listName.SelectedIndex;

       listAge.SelectedIndex = index;

       listDegree.SelectedIndex = index;

}