aspx文件

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="ListBox__Test.aspx.cs" Inherits="DataBind__Various_Controls.ListBox__Test" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>    
        <asp:ListBox ID="ListBox1" runat="server" Height="207px" Width="167px" AutoPostBack="True">
        </asp:ListBox>
    </div>

    <div>
        <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
        <br />
        <asp:Button ID="btnForListBoxDoubleClick" runat="server" Text="Button" />
    </div>
    </form>
</body>
</html>

cs文件

namespace DataBind__Various_Controls
{
    public partial class ListBox__Test : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                string postbackRef = ClientScript.GetPostBackEventReference(btnForListBoxDoubleClick, "dblClickfromHiddenButton"); //this.Page.GetPostBackClientEvent(btnForListBoxDoubleClick, "dblClickfromHiddenButton");
                ListBox1.Attributes.Add("onclick", postbackRef);                                
            }
        }

        private void btnForListBoxDoubleClick_ServerClick(object sender, System.EventArgs e)
        {
            string argument = Request.Params["__EVENTARGUMENT"].Trim();

            if (argument == "dblClickfromHiddenButton")
            {
                this.Label1.Text = "Hello!";
            }
        }
    }
}

错误页面

Server Error in '/' Application.
Invalid postback or callback argument.  Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page.  For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them.  If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.ArgumentException: Invalid postback or callback argument.  Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page.  For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them.  If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

[ArgumentException: Invalid postback or callback argument.  Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page.  For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them.  If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.]
   System.Web.UI.ClientScriptManager.ValidateEvent(String uniqueId, String argument) +8620921
   System.Web.UI.Control.ValidateEvent(String uniqueID, String eventArgument) +72
   System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +35
   System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +10
   System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13
   System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +175
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1565


Version Information: Microsoft .NET Framework Version:2.0.50727.3053; ASP.NET Version:2.0.50727.3053

我该如何解决这个问题？

Answer 1

有两种方法可以摆脱错误

<强> 1。禁用事件验证

这很简单，你需要做的就是在page指令中设置EnableEventValidation =“false”。

<%@ Page Language="C#" EnableEventValidation="false" EnableAutoEventWireup="true" CodeBehind="ListBox__Test.aspx.cs" Inherits="DataBind__Various_Controls.ListBox__Test" %>

但不推荐Microsoft（It is strongly recommended that you do not disable event validation. If you do disable event validation, make sure that no postback could be constructed that could have an unintended effect on your application.）

<强> 2。注册您的活动

您可以通过覆盖Render方法来注册客户端脚本。请注意，“渲染”是唯一允许您执行此操作的地方。

protected override void Render(HtmlTextWriter writer)
{
    Page.ClientScript.RegisterForEventValidation("btnForListBoxDoubleClick",  
                                                            "dblClickfromHiddenButton");
}

这应该摆脱EnableEventValidation错误，而不必禁用事件验证。

希望这有帮助！

作为旁注，我不确定您是如何在页面中连接事件处理程序btnForListBoxDoubleClick_ServerClick的。该事件将如何触发？

asp.net listbox双击事件+事件处理程序

aspx文件

cs文件

错误页面

1 个答案: