RegisterStartupScript不適用於ScriptManager，UpdatePanel。這是爲什麼？

Question

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觸發器和更新面板。和警報消息犯規上timer_tick事件顯示

Answer 1

當您使用更新面板，那麼你不能調用JavaScript像上面。你必須使用

ScriptManager.RegisterStartupScript 

所以更改

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

到

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

Answer 2

因爲你是一個註冊腳本做回發時使用的UpdatePanel

MSDN您需要用戶的ScriptManager類：ScriptManager.RegisterStartupScript

用來添加客戶端

ScriptManager.RegisterStartupScript方法當控件被包裝在UpdatePanel中時腳本到頁面。

ASPX頁面

<div> 
<asp:ScriptManager ID="ScriptManager1" runat="server"> 
</asp:ScriptManager> 
<asp:UpdatePanel ID="UpdatePanel1" runat="server"> 
    <ContentTemplate> 
     <asp:Label ID="lblDisplayDate" runat="server" Text="Label"></asp:Label> 
     <asp:Button ID="btnPostback" runat="server" onclick="btnPostback_Click" 
     Text="ClickMe" /> 
    </ContentTemplate> 
</asp:UpdatePanel> 
</div> 

代碼隱藏註冊啓動腳本

protected void btnPostback_Click(object sender, EventArgs e) 
{ 
    System.Text.StringBuilder sb = new System.Text.StringBuilder(); 
    sb.Append(@"<script language='javascript'>"); 
    sb.Append(@"var lbl = document.getElementById('lblDisplayDate');"); 
    sb.Append(@"lbl.style.color='red';"); 
    sb.Append(@"</script>"); 

    ScriptManager.RegisterStartupScript(btnPostback,this.GetType(), "JSCR", sb.ToString(),false); 

} 

詳細信息：Add JavaScript programmatically using RegisterStartupScript during an Asynchronous postback

Answer 3

它必須是未有點晚，但我在這裏找到了soluce http://forums.asp.net/p/1117430/5483679.aspx/1

你必須使用System.Web.UI.ScriptManager.RegisterClientScriptBlock代替Page.ClientScript.RegisterSta rtupScript

Answer 4

在我的情況ScriptManager.RegisterStartupScript不起作用。

不起作用：

ScriptManager.RegisterStartupScript(Me, 
    Me.GetType(), 
    String.Format("Data{0}", Me.ID), 
    "<script>alert(111);</script>", 
    False) 

工作：

ScriptManager.RegisterStartupScript(Me.Page, 
    Me.GetType(), 
    String.Format("Data{0}", Me.ID), 
    "<script>alert(111);</script>", 
    False) 

Me的例子是從System.Web.UI.WebControls.WebParts.WebPart

Answer 5

這對我的作品時，我不喜歡這樣

繼承了我的自定義控件

Private Sub test() 
     ScriptManager.RegisterStartupScript(Me.Page, Me.GetType(), "k1", "alert('hello')", True) 
    End Sub 

但是當我添加SweerAlert它它不會工作

Private Sub test() 
      ScriptManager.RegisterStartupScript(Me.Page, Me.GetType(), "k1", "swal('Please Provide All Valid Message Information!')", True) 
     End Sub 

你有爲什麼它不工作的任何想法。