当我从客户端返回一个页面时,我得到以下错误。我有JavaScript代码,修改asp:ListBox在客户端。

我们如何解决这个问题?

错误详情如下:

Server Error in '/XXX' Application.

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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) +2132728
   System.Web.UI.Control.ValidateEvent(String uniqueID, String eventArgument) +108
   System.Web.UI.WebControls.ListBox.LoadPostData(String postDataKey, NameValueCollection postCollection) +274
   System.Web.UI.WebControls.ListBox.System.Web.UI.IPostBackDataHandler.LoadPostData(String postDataKey, NameValueCollection postCollection) +11
   System.Web.UI.Page.ProcessPostData(NameValueCollection postData, Boolean fBeforeLoad) +353
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1194

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Version Information: Microsoft .NET Framework Version:2.0.50727.1433; ASP.NET Version:2.0.50727.1433

当前回答

四分钟前我收到了同样的错误。然后我像你一样研究了半个小时。在所有论坛中,他们通常会说“添加页面enableEvent..”=假或真”。任何提出的解决方案都不能解决我的问题,直到我找到它。不幸的是,问题出在ASP。净按钮。我两秒钟前把它取下来了。我尝试用“imagebutton”替换,但这也是不可接受的(因为它给出了相同的错误)。

最后我已经替换为LinkButton。它似乎起作用了!

其他回答

我知道这是一个超级老的帖子。假设你正在调用你的应用程序,这里有一个对我有用的想法:

在页面上实现ICallbackEventHandler ClientScriptManager打电话。GetCallbackEventReference调用服务器端代码 正如错误消息所述,您可以调用ClientScriptManager。RegisterForEventValidation

如果你不需要完全控制,你可以使用一个更新面板来为你做这件事。

如果您预先知道可以填充的数据,那么可以使用ClientScriptManager来解决这个问题。当我在以前的用户选择上使用javascript动态填充下拉框时,我遇到了这个问题。

下面是一些覆盖呈现方法(在VB和c#中)并为下拉列表ddCar声明潜在值的示例代码。

在VB:

Protected Overrides Sub Render(ByVal writer As System.Web.UI.HtmlTextWriter)

    Dim ClientScript As ClientScriptManager = Page.ClientScript

    ClientScript.RegisterForEventValidation("ddCar", "Mercedes")

    MyBase.Render(writer)
End Sub

或者c#的轻微变化可以是:

protected override void Render(HtmlTextWriter writer)
{
    Page.ClientScript.RegisterForEventValidation("ddCar", "Mercedes");
    base.Render(writer);
}

对于新手:这应该在文件(.vb或.cs)后面的代码中,或者如果在aspx文件中使用,您可以在<script>标记中进行包装。

对我有用的是将以下代码从page_load移动到page_prerender:

lstMain.DataBind();
Image img = (Image)lstMain.Items[0].FindControl("imgMain");

// Define the name and type of the client scripts on the page.
String csname1 = "PopupScript";
Type cstype = this.GetType();

// Get a ClientScriptManager reference from the Page class.
ClientScriptManager cs = Page.ClientScript;

// Check to see if the startup script is already registered.
if (!cs.IsStartupScriptRegistered(cstype, csname1))
{
    cs.RegisterStartupScript(cstype, csname1, "<script language=javascript> p=\"" + img.ClientID + "\"</script>");
}

正如Nick B说的,这对我很有用在某些情况下你必须删除换行符。看一下代码:

错误的方法:

<asp:DropDownList ID="DropDownList1" runat="server">
    <asp:ListItem Selected="True">
            Item 1</asp:ListItem>
    <asp:ListItem>
            Item 2</asp:ListItem>
    <asp:ListItem>
            Item 3</asp:ListItem>
</asp:DropDownList>

-对道:

<asp:DropDownList ID="DropDownList1" runat="server">
    <asp:ListItem Selected="True">Item 1</asp:ListItem>
    <asp:ListItem>Item 2</asp:ListItem>
    <asp:ListItem>Item 3</asp:ListItem>
</asp:DropDownList>

我只在IE10+中遇到过

我通过没有将ListBox添加到父Page/Control控件集合来解决这个确切的错误。因为我真的不需要任何服务器端功能。我只是想用它来输出自定义服务器控件的HTML,这是我在OnRender事件处理程序中自己做的。我希望使用该控件可以使我不必编写自己的html响应。

这个解决方案可能不适合大多数人,但它使ASP。NET对控件执行ValidateEvent,因为控件在回发之间不会保留在内存中。

此外,我的错误是由选定的列表项是一个项目,不是在前回发的列表框。希望能帮到谁。