如何获得下拉列表中所选项目的价值？

Question

I need to select values from selected item in a drop down list in asp.net. in this code:

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

But it seems that the value could not be read and so label1.text wasn't changed. how I could get the correct value of a selected item in this situation?

Answer 1

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

Answer 2

Set AutoPosback prperty of DDL to TRUE

Use the Parse

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