的RegisterStartupScript犯规用的ScriptManager，UpdatePanel的工作。这是为什么？ [英] RegisterStartupScript doesnt work with ScriptManager,Updatepanel. Why is that?

问题描述

protected void timer1_Tick(object sender, EventArgs e)
    {
        foreach (RepeaterItem item in rpChat.Items)
        {
            TextBox txt = item.FindControl("txtChatMessage") as TextBox;
            if (txt != null)
            {
                message[i] = txt.Text;
                i--;
            }
        }
        lblStatusChat.Text = "";
        RepeaterBind();
        string javaScript = "<script language=JavaScript>\n" + "alert('Button1_Click client-side');\n" + "</script>";

        Page.ClientScript.RegisterStartupScript(this.GetType(), "myKey", javaScript);
    }

timer_click trigggers和更新面板。和警报消息犯规出现在timer_tick事件

timer_click trigggers and update panel. And the alert message doesnt show up on timer_tick event

推荐答案

当您使用更新面板，那么你不能调用JavaScript像上面。你必须用

When you use update panel then you can not call javascript like above. You have to use

ScriptManager.RegisterStartupScript

所以更改

Page.ClientScript.RegisterStartupScript(this.GetType(), "myKey", javaScript);

到

ScriptManager.RegisterStartupScript(updatePanelId,updatePanelId.GetType()
                                                      , "alert", javaScript, true);

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