我有一個帶有ScriptManager控件,一些LinkButton控件和一個PlaceHolder控件的ASPX頁面。每個LinkButton將在PlaceHolder控件中添加(OnPageLoad)特定的用戶控件。每個UserControl都有一個ScriptManagerProxy控件和一個UpdatePanel(UpdateMode = Conditional),它包含一些CheckBox(AutoPostback = true)控件和一個GridView。UpdatePanel無法在第一次點擊
問題是,當您單擊一個CheckBox控件時,它會被檢查,但沒有任何反應。當您再次單擊它時,它將被取消選中,並導致整個頁面的完整回發。 CheckBox控件的後續點擊按照它們應該異步的方式工作。
用戶控制1:標記
<%@ Control Language="C#" AutoEventWireup="true" CodeFile="UserControl1.ascx.cs" Inherits="UserControls_UserControl1" %>
<div>
<asp:ScriptManagerProxy ID="smp1" runat="server" />
<asp:UpdatePanel ID="up1" UpdateMode="Conditional" runat="server">
<ContentTemplate>
<h1>CheckBox Test 1</h1>
<asp:Panel ID="pnlOptions" runat="server" Visible="true">
<asp:Panel ID="pnlCheckTest1" runat="server">
<asp:CheckBox ID="chkCheckTest1"
AutoPostBack="true"
Text="Test 1"
OnCheckedChanged="chkCheckTest1_CheckChanged"
runat="server" />
</asp:Panel>
<asp:Panel ID="pnlCheckTest2" runat="server">
<asp:CheckBox ID="chkCheckTest2"
AutoPostBack="true"
Text="Test 2"
OnCheckedChanged="chkCheckTest2_CheckChanged"
runat="server" />
</asp:Panel>
</asp:Panel>
<br /><br />
<div>
<asp:Label ID="lblTestCheck1" runat="server" />
</div>
</ContentTemplate>
</asp:UpdatePanel>
</div>
用戶控制1:代碼
public partial class UserControls_UserControl1 : System.Web.UI.UserControl
{
protected void chkCheckTest1_CheckChanged(object sender, EventArgs e)
{
lblTestCheck1.Text = "Tiny";
}
protected void chkCheckTest2_CheckChanged(object sender, EventArgs e)
{
lblTestCheck1.Text = "Large";
}
}
用戶控制2:標記
<%@ Control Language="C#" AutoEventWireup="true" CodeFile="UserControl2.ascx.cs" Inherits="UserControls_UserControl2" %>
<div>
<asp:ScriptManagerProxy ID="smp1" runat="server" />
<asp:UpdatePanel ID="up1" UpdateMode="Conditional" runat="server">
<ContentTemplate>
<h1>CheckBox Test 2</h1>
<asp:Panel ID="pnlOptions" runat="server" Visible="true">
<asp:Panel ID="pnlCheckTest1" runat="server">
<asp:CheckBox ID="chkCheckTest1"
AutoPostBack="true"
Text="Test 1"
OnCheckedChanged="chkCheckTest1_CheckChanged"
runat="server" />
</asp:Panel>
<asp:Panel ID="pnlCheckTest2" runat="server">
<asp:CheckBox ID="chkCheckTest2"
AutoPostBack="true"
Text="Test 2"
OnCheckedChanged="chkCheckTest2_CheckChanged"
runat="server" />
</asp:Panel>
</asp:Panel>
<br /><br />
<div>
<asp:Label ID="lblTestCheck2" runat="server" />
</div>
</ContentTemplate>
</asp:UpdatePanel>
</div>
用戶控制2:代碼
public partial class UserControls_UserControl2 : System.Web.UI.UserControl
{
protected void chkCheckTest1_CheckChanged(object sender, EventArgs e)
{
lblTestCheck2.Text = "Small";
}
protected void chkCheckTest2_CheckChanged(object sender, EventArgs e)
{
lblTestCheck2.Text = "Big";
}
}
主頁:標記
<%@ Page Title="" Language="C#" AutoEventWireup="true"CodeFile="CheckBoxTest.aspx.cs" Inherits="CheckBoxTest" %>
<html>
<head id="head1" runat="server">
<title>Check Box Test</title>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="sm1" runat="server" />
<div id="Div1" runat="server">
<asp:LinkButton ID="lbCheckTest1" runat="server" Text="Check Test 1"
onclick="lbCheckTest1_Click" />
<br />
<asp:LinkButton ID="lbCheckTest2" runat="server" Text="Check Test 2"
onclick="lbCheckTest2_Click" />
</div>
<br /><br /><br /><br />
<div id="Div2" runat="server">
<asp:PlaceHolder
ID="phTable"
runat="server" />
</div>
</form>
</body>
</html>
主頁:代碼
public partial class CheckBoxTest : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (Page.IsPostBack)
{
try
{
Control ctrl = LoadControl(Session["CurrentControl"] as String);
phTable.Controls.Add(ctrl);
}
catch
{
// ...
}
}
}
protected void lbCheckTest1_Click(object sender, EventArgs e)
{
Session["CurrentControl"] = "~/UserControls/UserControl1.ascx";
Control ctrl = LoadControl(Session["CurrentControl"] as String);
phTable.Controls.Clear();
phTable.Controls.Add(ctrl);
}
protected void lbCheckTest2_Click(object sender, EventArgs e)
{
Session["CurrentControl"] = "~/UserControls/UserControl2.ascx";
Control ctrl = LoadControl(Session["CurrentControl"] as String);
phTable.Controls.Clear();
phTable.Controls.Add(ctrl);
}
}
CheckBox位於UpdatePanel內部,因此它會自動觸發異步回傳。 –
把複選框放在側面更新面板 –
我把複選框放在更新面板之外,並將其設置爲觸發器,並沒有改變任何東西(不明白爲什麼它會真的)。我把上面所有的代碼放在你可以嘗試的地方。 –