Question

I am really stuck with this so I hope someone can help. I have 2 winforms, one has a listview and another has a textbox. I want to check which item is checked in the listview and copy this text into the second form. I have tried this code but it won’t work, any help is greatly appreciated!

// 1st form

private void button5_Click(object sender, EventArgs e) // Brings up the second form
{
   Form4 editItem = new Form4();
   editItem.Show();
} 

public string GetItemValue()
{
   for (int i = 0; i < listView1.Items.Count; i++)
   {
      if (listView1.Items[i].Checked == true)
      {
         return listView1.Items[i].Text;
      }
   }
   return "Error";
}

// 2nd form

private void Form4_Load(object sender, EventArgs e)
{
   Form1 main = new Form1();
   textBox1.Text = main.GetItemValue();
}

Answer 1

You only need a couple of changes. No need to add your own way of storing the owner form as this functionality already exists.

private void button5_Click(object sender, EventArgs e) // Brings up the second form 
{
    Form4 editItem = new Form4();
    editItem.Show(this); //passes a reference to this form to be stored in owner
}  

Then reference it on the other form.

private void Form4_Load(object sender, EventArgs e)
{
    textBox1.Text = ((Form1)owner).GetItemValue();
}