Question

我需要在asp.net的下拉列表中选择所选项目的值。在这段代码中：

protected void EducationFeildsList_SelectedIndexChanged(object sender, EventArgs e)
{
    int index = Convert.ToInt32(EducationFeildsList.SelectedIndex);
    Label1.Text = index.ToString(CultureInfo.InvariantCulture);
}

但似乎无法读取该值，因此label1.text未被更改。在这种情况下，如何获得所选项目的正确值？

Answer 1

protected void EducationFeildsList_SelectedIndexChanged(object sender, EventArgs e)
{
  If (!IsPostback)
   {
    Label1.Text = Dropdownlist1.Selectedvalue;
   }
}

Answer 2

将DDL的AutoPostback属性设置为 TRUE

使用Parse

protected void EducationFeildsList_SelectedIndexChanged(object sender, EventArgs e)
{
int index = int.Parse(EducationFeildsList.SelectedIndex);
Label1.Text = index.ToString(CultureInfo.InvariantCulture);
}

如何在下拉列表中获取所选项的值？

2 个答案: