winform中listview空间显示问题

[cheetah--y]

为何点击第二次才显示第一次输入的数据，新手求指导。。。
private void button7_Click(object sender, EventArgs e)
{
if (this.textBox7.Text == "" || this.textBox8.Text == "" || this.comboBox2.Text == "" || this.comboBox1.Text == ""
|| this.dateTimePicker5.Text == "" || this.comboBox3.Text == "" || this.textBox10.Text == "" || this.textBox11.Text == "")
{
MessageBox.Show("请将信息填写完整！");
return;
}
else
{
outpay pay = new outpay();
pay.ID = int.Parse(this.textBox7.Text);
pay.Money = int.Parse(this.textBox8.Text);
pay.PayWay = this.comboBox2.Text;
pay.PayType=this.comboBox1.Text;
pay.FromWhere=this.comboBox3.Text;
pay.PayTime = this.dateTimePicker5.Text;
pay.Owner=this.textBox10.Text;
pay.InFo=this.textBox11.Text;


/*
listView2.Items.Clear();
foreach (outpay o in outPay)
{
string id = o.ID.ToString();
ListViewItem lv = new ListViewItem(id);
listView2.Items.Add(lv);
lv.SubItems.AddRange(new string[] {o.Money.ToString(), o.PayType,
o.PayWay,o.PayTime,o.FromWhere,o.Owner,o.InFo});
*/


string[] str = new string[8];
foreach (outpay o in outPay)
{
str[0] = this.textBox7.Text;
str[1] = this.textBox8.Text;
str[2] = this.comboBox2.Text;
str[3] = this.comboBox1.Text;
str[4] = this.dateTimePicker5.Text;
str[5] = this.comboBox3.Text;
str[6] = this.textBox10.Text;
str[7] = this.textBox11.Text;
ListViewItem item = new ListViewItem(str, 0);
listView2.Items.Add(item);
}

outPay.Add(pay);
SetOutPay();



//button2_Click(sender, e);
MessageBox.Show("添加成功！", "提示信息", 0, 0);
}

[cheetah--y]

是我太新手没人看么。。。

[cheetah--y]

结贴，程序顺序调一下。。。