[問題] ASP.NET postback後抓不到Control
public DropDownList ddl;
protected void Page_LoadComplete(object sender, EventArgs e)
{
ddl = new DropDownList();
ddl.ID = "ID";
node.Controls.Add(ddl); // node is a TableCell
}
//<asp:TextBox
// AutoPostBack="true" OnTextChanged="OnTextChanged" runat="server">
//</asp:TextBox>
protected void OnTextChanged(object sender, EventArgs e)
{
DropDownList tmpDDL1 = ddl; // null
DropDownList tmpDDL2 = FindControl("ID"); // null
DropDownList tmpDDL3 = node.FindControl("ID"); // null
DropDownList tmpDDL4 = this.FindControl("ID"); // null
DropDownList tmpDDL5 = this.Page.FindControl("ID"); // null
DropDownList tmpDDL6 = fnFindControlRecursive(this, "ID"); // null
}
在畫面上還是看得到這個DDL
只是我抓不到它
想要給它設selected該怎麼辦呢
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