asp.net - 我在这个中继器中有一个中继器和一个下拉列表

Question

我在中继器内填充下拉列表（DropDownList 填充了数据库中的值）

protected void Repeater1_ItemDataBound(object sender, RepeaterItemEventArgs e)
    {
        try
        {
            if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
            {
                string idAdvert = objAdvert.GetAllIlanPage(ClsSession.idUser, null).Rows[i]["ID_ADVERT"].ToString();
                DropDownList DDL = (DropDownList)e.Item.FindControl("DropDownList1");
                DDL.Items.Add("");
                DDL.Items.Add(new ListItem("Doping", idAdvert));
                DDL.Items.Add(new ListItem("İşlem", idAdvert));
                DDL.SelectedIndex = 0;
                i = i + 1;

            }
        }

它正在工作，但是当我单击下拉列表时，selectedindexchanged 不起作用。它总是发送 selectedIndex=1

 protected void SelectedIndex_Degisti(object sender, EventArgs e)
    {
        //DropDownList ddl = sender as DropDownList;
        //DropDownList doldurulacak_ddl = (DropDownList)ddl.Parent.FindControl("DropDownList1"); 
        ////Aynı satırdaki doldurulacak diğer droplisti bulduk.

        Control parent = ((Control)sender).Parent;
        DropDownList GeneralDDL = (DropDownList)parent.FindControl("DropDownList1");

        if (GeneralDDL.SelectedItem.Text == "Doping") ;//Response.Redirect("default.aspx");
        else if (GeneralDDL.SelectedItem.Text == "İşlem") ;// Response.Redirect("login.aspx");
    }

Answer 1

由于您正在动态地将控件添加到 Repeater，因此您必须确保在每个 PostBack上重新添加这些控件。这将使 from 值能够设置为用户选择的值。

尝试将您的Repeater.DataBind()呼叫转移到OnInit()活动。