小编rav*_*avi的帖子

我有一个DropDownList我试图展示的,div OnSelectedIndexChanged但它说OBJECT REQUIRED.

我绑定了DataList那个div:

aspx:

<asp:DropDownList runat="server" ID="lstFilePrefix1" AutoPostBack="True" 
                  OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged" >
  <asp:ListItem Text="Prefix1" Value="Prefix1" />
  <asp:ListItem Text="Prefix2" Value="Prefix2" />
  <asp:ListItem Text="Prefix3" Value="Prefix3" />
  <asp:ListItem Text="Prefix1 and Prefix2" Value="Prefix1 and Prefix2" />
  <asp:ListItem Text="Prefix2 and Prefix3" Value="Prefix2 and Prefix3" />
</asp:DropDownList>

<asp:DataList ID="DataList1" runat="server" RepeatColumns="4"  
              CssClass="datalist1"  OnItemDataBound="SOMENAMEItemBound"
              CellSpacing="6" onselectedindexchanged="DataList1_SelectedIndexChanged" 
              HorizontalAlign="Center" Width="500px">

代码背后:

protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
    if (lstFilePrefix1.SelectedItem.Text=="Prefix2")
    {
        int TotalRows = this.BindList(1);
        this.Prepare_Pager(TotalRows);
        Page.ClientScript.RegisterClientScriptBlock(GetType(), "JScript1", "ShowDiv('data');", true); …