private void btn_down_Click(object sender, EventArgs e)
{
if (!string.IsNullOrEmpty (textBox1.Text .Trim ()))
{
int num = int.Parse(textBox1.Text.Trim());
if (!string .IsNullOrEmpty (downloadPath ))
{
Random r = new Random();
string url;
for (int i = 0; i <num ; i++)
{
url = txt_Url.Text + r.Next(1, 9999);
SaveCodeImageFromUrl(url, downloadPath+"\\"+i+".jpg");
}
MessageBox.Show("下载完毕!");
}
else
{
MessageBox.Show("没有选择保存路径");
}
}
else
{
MessageBox.Show("数量没有填!");
}
}