我有一个连接到ObjectDataSource的DropDownList.在我的页面加载中,我根据具体情况将selectedvalue设置为特定值.如何在我的方法中选择索引以"重置"所选值,以便您仍然可以从其他选项中进行选择?或者我不应该使用selectedvalue来设置下拉列表的默认值?
<asp:DropDownList ID="DropDownList" runat="server" DataSourceID="ObjectDataSource" DataTextField="Type" DataValueField="TypeId"
AutoPostBack="true" onselectedindexchanged="DropDownList_SelectedIndexChanged" >
</asp:DropDownList>
protected void Page_Load(object sender, EventArgs e)
{
int default = category.TypeId;
DropDownList.SelectedIndex = default;
}
protected void DropDownList_SelectedIndexChanged(object sender, EventArgs e)
{
int id = int.Parse(DropDownList.SelectedValue);
Session["id"] = id;
}
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