【发布时间】：2015-02-18 11:18:29
【问题描述】：
我在更新面板内的用户控件中有两个 asp 按钮。但是当我单击它们时，回发未完成（我将一个 java 脚本警报设置为 page_load 以告诉我何时发生回发，例如，它会在下拉列表选择更改时触发）。我不明白为什么按钮没有回发。
我的用户控件，有问题的按钮是 createBtn 和 signinBtn。
<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="Login.ascx.cs" Inherits="TestApp2.Views.Login" %>
<asp:UpdatePanel ID="LoginMainUpdatePanel" runat="server" UpdateMode="Conditional" OnUnload="UpdatePanel_Unload">
<ContentTemplate>
<asp:TextBox ID="infoTB" runat="server" TextMode="MultiLine" />
<div>
<div class="left-align" style="background-color:blue">
<asp:button runat="server" id="createBtn" CssClass="btn btn-default" OnClick="createBtn_Click" Text="Create" /><br/>
<asp:button runat="server" id="signinBtn" CssClass="btn btn-default" OnClick="signinBtn_Click" Text="Sign In" />
</div>
<!-- Login View -->
<div id="loginView" runat="server" class="centre-form centering text-center" style="background-color:green">
<h1>Login</h1>
<asp:Label ID="info" runat="server" Text="" />
<div class="form-group">
<label for="userIn">Username</label>
<asp:TextBox runat="server" id="userIn" CssClass="form-control" TextMode="SingleLine" />
<asp:RequiredFieldValidator runat="server" id="reqUser" controltovalidate="userIn" errormessage="Enter Username" />
</div>
<div class="form-group">
<label for="passwordIn">Password</label>
<asp:TextBox runat="server" id="passwordIn" CssClass="form-control" Text="Enter Password" TextMode="Password" />
<asp:RequiredFieldValidator runat="server" id="reqPass" controltovalidate="passwordIn" errormessage="Enter Password" />
</div>
<asp:Button runat="server" id="loginBtn" CssClass="btn btn-default" onclick="loginBtn_Click" text="Login" />
</div>
<!-- Create Account View -->
<div id="createView" runat="server" class="centre-form centering text-center" style="background-color:green">
<h1>Create</h1>
<div class="form-horizontal">
<div class="form-group" style="background-color:yellow;">
<asp:TextBox runat="server" id="personalFName" CssClass="form-control" TextMode="SingleLine" />
<label class="control-label" for="personalFName">First Name</label>
</div>
<div class="form-group">
<asp:TextBox runat="server" id="personalLName" CssClass="form-control" TextMode="SingleLine" />
<label class="control-label" for="personalLName" >Last Name</label>
</div>
<div class="form-group">
<asp:DropDownList runat="server" id="selGender" CssClass="form-control">
<asp:ListItem Value="Male" Text="Male" />
<asp:ListItem Value="Female" Text="Female" />
<asp:ListItem Value="Other" Text="Other" />
</asp:DropDownList>
<label class="control-label" for="selGender">Gender</label>
</div>
<asp:UpdatePanel ID="dobUpdatePanel" runat="server" UpdateMode="Conditional" OnUnload="UpdatePanel_Unload">
<ContentTemplate>
<div class="form-group">
<asp:DropDownList runat="server" id="selYear" CssClass="form-control" OnSelectedIndexChanged="selYear_SelectedIndexChanged" AutoPostBack="true" />
<asp:DropDownList runat="server" id="selMonth" CssClass="form-control" OnSelectedIndexChanged="selMonth_SelectedIndexChanged" AutoPostBack="true" />
<asp:DropDownList runat="server" id="selDay" CssClass="form-control"/>
<label class="control-label" for="selDay" >Date of Birth</label>
</div>
</COntentTemplate>
</asp:UpdatePanel>
</div>
</div>
</div>
</ContentTemplate>
</asp:UpdatePanel>后面的代码是这样的
public partial class Login : System.Web.UI.UserControl
{
private DateMenu dobCtrl;
protected void Page_Load(object sender, EventArgs e)
{
if (Session[Paths.USERDETAILS] != null) Response.Redirect(Paths.USERCTRL_BASE + "Profile.ascx");
else setDetails();
}
protected void loginBtn_Click(object sender, EventArgs e)
{
if (Page.IsValid)
{
String SOAPbdy = "<Username>" + userIn.Text + "</Username><Password>" + passwordIn.Text + "</Password>";
HTTPRequest req = new HTTPRequest();
String response = req.HttpSOAPRequest(SOAPbdy, "GetUser");
infoTB.Text += response;
String uIDs = (new XMLParse(response)).getElementText("UserID");
int uID = 0;
Int32.TryParse(uIDs, out uID);
if (uID > 0)
{
Session["userDetails"] = response;
info.Text = "Success";
}
else info.Text = "Login failed";
}
}
private void setDetails()
{
if (dobCtrl == null) dobCtrl = new DateMenu(selYear, selMonth, selDay);
dobCtrl.setDateDropdown();
}
protected void UpdatePanel_Unload(object sender, EventArgs e)
{
MethodInfo methodInfo = typeof(ScriptManager).GetMethods(BindingFlags.NonPublic | BindingFlags.Instance)
.Where(i => i.Name.Equals("System.Web.UI.IScriptManagerInternal.RegisterUpdatePanel")).First();
methodInfo.Invoke(ScriptManager.GetCurrent(Page),
new object[] { sender as UpdatePanel });
}
protected void selYear_SelectedIndexChanged(object sender, EventArgs e)
{
dobCtrl.fillDays();
}
protected void selMonth_SelectedIndexChanged(object sender, EventArgs e)
{
dobCtrl.fillDays();
}
protected void createBtn_Click(object sender, EventArgs e)
{
loginView.Visible = false;
}
protected void signinBtn_Click(object sender, EventArgs e)
{
}
}
【问题讨论】：
-
您的 UpdateMode 是有条件的。您是否尝试过添加 ChildrenAsTriggers=true？
-
是的，试过了。无论如何，默认值为 true。