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

我有一个类似的问题,但我没有使用ASP。Net 1.1也没有通过javascript更新控件。 我的问题只发生在Firefox而不是IE(!)。

我在PreRender事件的下拉列表中添加了如下选项:

DropDownList DD = (DropDownList)F.FindControl("DDlista");
HiddenField HF = (HiddenField)F.FindControl("HFlista");
string[] opcoes = HF.value.Split('\n');
foreach (string opcao in opcoes) DD.Items.Add(opcao);

我的“HF”(隐藏字段)有换行符分隔的选项,如下所示:

HF.value = "option 1\n\roption 2\n\roption 3";

问题是HTML页面在代表下拉菜单的“选择”选项上出现了问题(我的意思是有换行符)。

所以我解决了我的问题加了一行

DropDownList DD = (DropDownList)F.FindControl("DDlista");
HiddenField HF = (HiddenField)F.FindControl("HFlista");
string dados = HF.Value.Replace("\r", "");
string[] opcoes = dados.Split('\n');
foreach (string opcao in opcoes) DD.Items.Add(opcao);

希望这能帮助到一些人。

其他回答

Ajax UpdatePanel可以做到这一点,我认为这是最简单的方法,忽略Ajax回发开销。

在Page_Load事件中有代码吗?如果是,那么添加以下内容可能会有所帮助。

if (!Page.IsPostBack)
{ //do something }

在正常的生命周期中,当您单击命令并再次运行Page_load时,将抛出此错误 Page_Load ->单击“Command -> Page_Load(再次)-> Process ItemCommand Event”

这里没有提到的另一种方法是子类化ListBox

Ie.

public class ListBoxNoEventValidation : ListBox 
{
}

如果你子类化了system . web . ui . supportsevenvalidation属性,除非你显式地把它添加回来,否则它永远不会调用验证例程。这对任何控件都有效,而且是我发现的在一个控件的基础上“禁用”它的唯一方法(即,不是页面级别)。

我遇到了同样的问题,两个列表框和两个按钮。

列表框中的数据是从数据库中加载的,您可以通过单击按钮在框之间移动项目。

我收到了一个无效的回发。

结果是数据中有回车换行符,当显示在列表框中时无法看到。

在除ie10和ie11之外的所有浏览器中都运行良好。

拆下车架回换线,一切正常。

供参考,我有同样的错误消息的问题,这是我在同一页上有2个表单标签。一个在母版页,一个在页面本身。一旦我删除了第二个形式标签对,问题就消失了。