Question

我想从微调器中获取所选项目的“ID”。

这是我的代码：

var sterren1Lems = new String[]
         {
                "1 out of 5 stars", "2 out of 5 stars", "3 out of 5 stars", "4 out of 5 stars", "5 out of 5 stars"
         };

            sterren2Lems = FindViewById<Spinner>(Resource.Id.sterrenLems);
            sterren2Lems.Adapter = new ArrayAdapter<string>(this, Android.Resource.Layout.SimpleSpinnerDropDownItem, sterren1Lems);

            TextView test = FindViewById<TextView>(Resource.Id.test);

            sterren2Lems.ItemSelected += delegate
            {
                test.Text = sterren1Lems[Convert.ToInt32(sterren2Lems.SelectedItemId)];
            };

请帮助我！

Answer 1

你不应该在字符串中提取任何值。您只需通过所选项目的位置来了解该值。

sterren2Lems.ItemSelected += Sterren2Lems_ItemSelected;

void Sterren2Lems_ItemSelected (object sender, AdapterView.ItemSelectedEventArgs e)
{
     test.Text = sterren1Lems[e.Position];
}

Answer 2

你的案例中的任何一种方法都没有用，我通过讨论得知你能从数组中获得一个id。所以只需使用简单的循环来获取sting yourString ="2 out of 5 stars"; string id = ""; for (int i = 0; i < yourString.Length; i++) { if (Char.IsDigit(yourString[i])) result += str[i]; else break; }。

string id = new String(yourString.TakeWhile(Char.IsDigit).ToArray());

OR

$handle = fopen("mytext.txt", "r");

$content = fread($handle,filesize("mytext.txt"));
$noDigit = preg_match("/[0-9]/","",$content);

fclose($handle);

如何获取微调器的ID？

2 个答案: