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protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
AjaxControlToolkit.TabContainer tc = new AjaxControlToolkit.TabContainer();
tc.ID = "tc";
AjaxControlToolkit.TabPanel tp = new AjaxControlToolkit.TabPanel();
tp.ID = "tp";
tp.HeaderText = "d";
TextBox t = new TextBox();
t.ID = "text";
t.Text = "dd";
tp.Controls.Add(t);
tc.Controls.Add(tp);
Panel1.Controls.Add(tc);
}
}
protected void Button1_Click1(object sender, EventArgs e)
{
AjaxControlToolkit.TabContainer tc = (AjaxControlToolkit.TabContainer)Panel1.FindControl("tc");
AjaxControlToolkit.TabPanel tp = (AjaxControlToolkit.TabPanel)tc.FindControl("tp");
TextBox tb = (TextBox)tp.FindControl("text");
Response.Write(tb.Text);
}
错误:
行 27: {
行 28: AjaxControlToolkit.TabContainer tc = (AjaxControlToolkit.TabContainer)Panel1.FindControl("tc");
行 29: AjaxControlToolkit.TabPanel tp = (AjaxControlToolkit.TabPanel)tc.FindControl("tp");
行 30: TextBox tb = (TextBox)tp.FindControl("text");
行 31: Response.Write(tb.Text);
未将对象引用设置到对象的实例。