回发后控件取值的问题.

Question

.ASPX页:
<asp:datalist id="dlOrgChart" runat="server" RepeatLayout="Flow">
<ItemTemplate>
<INPUT id=hidCompany type=hidden value='<%# DataBinder.Eval(Container.DataItem,"i_id")%>' 
runat="server">
</ItemTemplate>
</asp:datalist>.CS:
if(!IsPostBack)
{
dlDataBind();绑定dlOrgChart
}
private void btnSubmit_Click(object sender, System.EventArgs e)
{
Response.Write(hidCompany.Value.Trim());
}在SUBMIT前hidCompany还是有值的,submit时写出来的值是空的,为什么????

Answer 1

把dlDataBind()放到
if(!IsPostBack)
{
}
外
提示错误:
Object reference not set to an instance of an object.

Answer 2

private void btnSubmit_Click(object sender, System.EventArgs e){
HtmlInputHidden i;
foreach(RepeaterItem item in Repeater2.Items)
{
i = (HtmlInputHidden)item.FindControl("hidCompany");
Response.Write(i.Value.Trim());
}}

Answer 3

to: Truly(NULL),
取得控件的语句我都有滴............