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。

其他回答

如果您通过客户端脚本填写下拉列表,则在将表单提交回服务器之前清除列表;然后ASP。NET将不会抱怨,安全性将仍然存在。

为了从DDL中获得选择的数据,您可以将“OnChange”事件附加到DDL以收集隐藏输入或文本框中的值,并使用Style="display: none;"

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。

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。

你需要做2或3个,不要禁用事件验证。

在asp:listbox客户端添加项目有两个主要问题。

The first is that it interferes with event validation. What came back to the server is not what it sent down. The second is that even if you disable event validation, when your page gets posted back the items in the listbox will be rebuilt from the viewstate, so any changes you made on the client are lost. The reason for this is that a asp.net does not expect the contents of a listbox to be modified on the client, it only expects a selection to be made, so it discards any changes you might have made.

最好的选择是像推荐的那样使用更新面板。另一个选择,如果你真的需要这样做的客户端,是使用普通的<select>而不是<asp:ListBox>,并保持你的项目列表在一个隐藏字段。当页面在客户端上呈现时,您可以从文本字段内容的分割中填充它。

然后,当您准备发布它时,您从修改后的<select>中重新填充隐藏字段的内容。然后,当然,您必须在服务器上再次分割它,并对您的项目做一些事情,因为您的选择现在是空的,因为它回到了服务器上。

总而言之,这是一个非常麻烦的解决方案,我并不推荐,但如果您确实需要对listBox进行客户端修改,它确实可以工作。但是,我真的建议您在走这条路之前查看一下updatePanel。

如果您正在使用gridview,而不是在pageload inside !ispostback中绑定gridview,那么当您单击gridview中的编辑和删除行时,将出现此错误。

 protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
        bindGridview();
        }