无效的回发或回调参数。使用'<pages enableEventValidation="true"/>'启用事件验证

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.

--------------------------------------------------------------------------------
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

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

当前回答

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。

2008-12-21 14:16:02

其他回答

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。

2012-12-19 09:50:41

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>");
}

2010-10-14 21:35:27

在客户端使用JavaScript修改ListBox时，我也遇到了同样的问题。当您从客户端向ListBox添加页面呈现时不存在的新项时，就会发生这种情况。

我找到的修复方法是通知事件验证系统可以从客户端添加所有可能的有效项。您可以通过重写Page来实现这一点。渲染并调用Page.ClientScript.RegisterForEventValidation为你的JavaScript可以添加到列表框的每个值:

protected override void Render(HtmlTextWriter writer)
{
    foreach (string val in allPossibleListBoxValues)
    {
        Page.ClientScript.RegisterForEventValidation(myListBox.UniqueID, val);
    }
    base.Render(writer);
}

如果列表框有大量潜在的有效值，这可能有点麻烦。在我的例子中，我在两个listbox之间移动项目——一个有所有可能的值，另一个最初是空的，但当用户单击按钮时，在JavaScript中用第一个值的子集填充。在这种情况下，你只需要遍历第一个列表框中的项目，并将每个项目注册到第二个列表框中:

protected override void Render(HtmlTextWriter writer)
{
    foreach (ListItem i in listBoxAll.Items)
    {
        Page.ClientScript.RegisterForEventValidation(listBoxSelected.UniqueID, i.Value);
    }
    base.Render(writer);
}

2011-10-13 06:25:29

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”

2010-09-21 09:30:42

(1) EnableEventValidation = " false "...................这对我没用。

(2) ClientScript.RegisterForEventValidation……这对我没用。

解决方案1:

在GridView中将Button/ImageButton更改为LinkButton。它的工作原理。(但我喜欢ImageButton)

研究:Button/ImageButton和LinkButton使用不同的回发方法

原文:

http://geekswithblogs.net/mahesh/archive/2006/06/27/83264.aspx

解决方案2:

在OnInit()中，输入如下代码来设置Button/ImageButton的唯一ID:

protected override void OnInit(EventArgs e) {
  foreach (GridViewRow grdRw in gvEvent.Rows) {

  Button deleteButton = (Button)grdRw.Cells[2].Controls[1];

  deleteButton.ID = "btnDelete_" + grdRw.RowIndex.ToString();           
  }
}

原文:

http://www.c-sharpcorner.com/Forums/Thread/35301/

2013-03-30 02:58:11

无效的回发或回调参数。使用'<pages enableEventValidation="true"/>'启用事件验证

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