我有2个窗体，每次都通过不同的按钮（button1或button2）打开窗体2。
表格2：通过单击按钮并选择复选框，将设置值
Form1：将根据按下的按钮接收值。
此时，Form1没有接收回该值
Form1

public partial class Form1 : Form
    {
public string valFrom1;
public string valFrom2;
private void button1_Click(object sender, EventArgs e)
{
     var form1 = new Form2();
     form1.Show();
     valFrom1 = form1.value;
}
private void button2_Click(object sender, EventArgs e)
{
    var form2 = new Form2();
    form2.Show();
    valFrom2 = form2.value;
}

Form2

public partial class Form2 : Form
    {
 public  string value { get; set; }

    public void button1_Click(object sender, EventArgs e)
        {
            if (checkBox1.Checked)
            {
                value= "1";
            }
            if (checkBox2.Checked)
            {
                value = "2";
            }
            if (checkBox3.Checked)
            {
                value = "3";
            }
        }