未将对象引用设置到对象的实例。
一夜入冬鹅 2012-08-31 11:17:52 <tr>
<th>
促销状态:
</th>
<th>
<kzl:DropDownList ID="ddl_promotionsFlag" runat="server" AutoPostBack="true"
onselectedindexchanged="ddl_promotionsFlag_SelectedIndexChanged">
<asp:ListItem Text="正常" Value="1" Selected="True"></asp:ListItem>
<asp:ListItem Text="团购" Value="2"></asp:ListItem>
<asp:ListItem Text="限时" Value="3"></asp:ListItem>
<asp:ListItem Text="秒杀" Value="4"></asp:ListItem>
</kzl:DropDownList>
</th>
</tr>
protected void ddl_promotionsFlag_SelectedIndexChanged(object sender, EventArgs e)
{
if (ddl_promotionsFlag.SelectedValue == "3")
{
pnl_sale.Visible = true;
pnl_seckill.Visible = false;
}
if (ddl_promotionsFlag.SelectedValue == "4")
{
pnl_sale.Visible = false;
pnl_seckill.Visible = true;
}
else
{
pnl_seckill.Visible = false;
pnl_sale.Visible = false;
}
}
触发的时候提示“未将对象引用设置到对象的实例。”
求解!!!