I am having a problem with the callback panel:

The page has 2 primary parts:
1) A composite custom data control that uses callback to update. (nothing special (written by me))
2) An eo callback panel with several server controls that I use to add new records.

Here's what happens:
1) put something in server controls in callback panel.
2) execute server action that inserts the record.
3) clear server controls in callback panel.
4) run client script that triggers callback that updates the data control. (ClientSideAfterUpdate="callbackExecRet")
5) put something else in server controls in callback panel.
6) execute server action that inserts the record.
7) get the following error:



Server Error in '/PSHPWeb' Application.

---

The state information is invalid for this page and might be corrupted.
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.Web.HttpException: The state information is invalid for this page and might be corrupted.

Source Error:


[No relevant source lines]


Source File: c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\pshpweb\20a1b179\847e3118\App_Web_svmvfno-.2.cs Line: 0

Stack Trace:


[ViewStateException: Invalid viewstate.
Client IP: 127.0.0.1
Port:
User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; Embedded Web Browser from: http://bsalsa.com/; .NET CLR 2.0.50727; InfoPath.2; .NET CLR 1.1.4322; .NET CLR 3.0.04506.30)
ViewState: /wEWGQKdo+PjDAL7jsehBALkjsehBALljsehBAK12e7wBAK8tsSeCAKttsSeCAK6trydCAK4tsSeCAK+tsSeCAK7tsSeCAK6trSdCAK5tsSeCAK6tqCdCAK6tridCAK6tsSeCAKitsSeCAK6trCdCAK/tsSeCAK6toidCAK6toydCAK6toSdCAL+zqO2BALc3uCnBAKP6PmbATuoAXuhQ+L/K7kNZWggI9hLcnNI
Referer: http://localhost:35555/PSHPWeb/Secure/SingleRecord.aspx?ttype=sales&tvar=116979&fn=Jerry&ln=Rickenbach
Path: /PSHPWeb/Secure/SingleRecord.aspx]

[HttpException (0x80004005): The state information is invalid for this page and might be corrupted.]
System.Web.UI.ViewStateException.ThrowError(Exception inner, String persistedState, String errorPageMessage, Boolean macValidationError) +116
System.Web.UI.ClientScriptManager.EnsureEventValidationFieldLoaded() +321
System.Web.UI.ClientScriptManager.ValidateEvent(String uniqueId, String argument) +67
System.Web.UI.Control.ValidateEvent(String uniqueID, String eventArgument) +106
System.Web.UI.WebControls.ListBox.LoadPostData(String postDataKey, NameValueCollection postCollection) +120
System.Web.UI.WebControls.ListBox.System.Web.UI.IPostBackDataHandler.LoadPostData(String postDataKey, NameValueCollection postCollection) +11
System.Web.UI.Page.ProcessPostData(NameValueCollection postData, Boolean fBeforeLoad) +408
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +6978
System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +213
System.Web.UI.Page.ProcessRequest() +86
System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context) +18
System.Web.UI.Page.ProcessRequest(HttpContext context) +49
ASP.secure_singlerecord_aspx.ProcessRequest(HttpContext context) in c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\pshpweb\20a1b179\847e3118\App_Web_svmvfno-.2.cs:0
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +303
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +64

---

Version Information: Microsoft .NET Framework Version:2.0.50727.832; ASP.NET Version:2.0.50727.832


here is the code that runs the behind the form (partial)

protected void LinkButton1_Click(object sender, EventArgs e)
{
if(Page.IsValid)
{
StringBuilder sb = new StringBuilder();
sb.Append("p_iu_cpgContactSales 0,");
sb.Append(WFLcontrols.StringValidation.SQLValidateNumber(Request.QueryString["tvar"].ToString()) + ", ");
sb.Append(Session["userid"].ToString() + ", ");
sb.Append(this.ListBox1.SelectedValue + ", ");
sb.Append("'" + this.DatePicker1.SelectedDate.ToString("g") + "',");
sb.Append("'" + "" + "', "); //time info
sb.Append(this.DropDownList1.SelectedValue + ", ");
sb.Append((this.CheckBox1.Checked ? "1" : "0") + ", ");
sb.Append("'" + WFLcontrols.StringValidation.SQLValidateString(WFLcontrols.StringValidation.SQLReplaceSingleQuote(this.TextBox1.Text)) + "'");
int ret = WFLcontrols.GenericData.RunNonQuery(sb.ToString(), false, WebConfigurationManager.ConnectionStrings["local"].ConnectionString);
if(ret == 1)
{
ListBox1.SelectedIndex = -1;
DatePicker1.SelectedDate = DateTime.Now;
this.DropDownList1.SelectedIndex = -1;
CheckBox1.Checked = false;
TextBox1.Text = string.Empty;
}
else
{
Response.Write("The update failed. If this problems persists, please contact technical support.");
}
}
}

protected void CallbackPanel1_Execute(object sender, EO.Web.CallbackEventArgs e)
{
e.Data = "true";
}

and partial page code:

<cc1:DataTab ID="DataTabLeadManagement" runat="server" OnRequestData="DataTabLeadManagement_OnRequestData"
OnAction="DataTabLeadManagement_OnAction" EnableViewState="false" />
<eo:CallbackPanel ID="CallbackPanel1" runat="server" Width="100%" ClientSideAfterUpdate="callbackExecRet"
OnExecute="CallbackPanel1_Execute" Visible="false" Triggers="{ControlID:LinkButton1;Parameter:}">
<asp:Panel ID="Panel5" runat="server">
<div style="padding-left:40px; padding-top: 25px">
<table style="width:700px" cellpadding="0" cellspacing="0" border="0" class="tableAlt">
<colgroup>
<col style="width:100px" /><col style="width:250px" /><col style="width:100px" /><col style="width:150px" />
</colgroup>
<tr><td colspan="4" style="text-align:center; font-weight:bold">New Sales Action</td></tr>
<tr>
<td class="tdTitle" >Contact Type</td>
<td >
<asp:ListBox ID="ListBox1" runat="server" Height="55px">
<asp:ListItem Value="0">Phone Call</asp:ListItem>
<asp:ListItem Value="1">Appointment</asp:ListItem>
<asp:ListItem Value="2">Other</asp:ListItem>
</asp:ListBox><asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server"
ErrorMessage="Please select a contact type." ControlToValidate="ListBox1"></asp:RequiredFieldValidator>
</td>
<td class="tdTitle">Status of Contact</td>
<td >
<asp:DropDownList ID="DropDownList1" runat="server" Width="217px">
<asp:ListItem></asp:ListItem>
</asp:DropDownList><asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server"
ErrorMessage="Please fill in the status." ControlToValidate="DropDownList1"></asp:RequiredFieldValidator>
</td>
</tr>
<tr>
<td class="tdTitle">Date and Time</td>
<td valign="middle">
<eo:DatePicker id="DatePicker1" runat="server" DayHeaderFormat="FirstLetter" TitleLeftArrowImageUrl="DefaultSubMenuIconRTL"
DayCellHeight="16" OtherMonthDayVisible="True" DayCellWidth="19" TitleRightArrowImageUrl="DefaultSubMenuIcon"
ControlSkinID="None" PickerFormat="MM/dd/yyyy hh:mm tt">
<DayHoverStyle CssText="border-right: #fbe694 1px solid; border-top: #fbe694 1px solid; border-left: #fbe694 1px solid; border-bottom: #fbe694 1px solid"></DayHoverStyle>
<TitleStyle CssText="background-color:#9ebef5;font-family:Tahoma;font-size:12px;padding-bottom:2px;padding-left:6px;padding-right:6px;padding-top:2px;"></TitleStyle>
<DayHeaderStyle CssText="border-bottom: #aca899 1px solid"></DayHeaderStyle>
<DayStyle CssText="border-right: white 1px solid; border-top: white 1px solid; border-left: white 1px solid; border-bottom: white 1px solid"></DayStyle>
<SelectedDayStyle CssText="background-color: #fbe694; border-right: white 1px solid; border-top: white 1px solid; border-left: white 1px solid; border-bottom: white 1px solid"></SelectedDayStyle>
<TitleArrowStyle CssText="cursor:hand"></TitleArrowStyle>
<TodayStyle CssText="border-right: #bb5503 1px solid; border-top: #bb5503 1px solid; border-left: #bb5503 1px solid; border-bottom: #bb5503 1px solid"></TodayStyle>
<PickerStyle CssText="font-family:Courier New; padding-left:5px; padding-right: 5px;"></PickerStyle>
<OtherMonthDayStyle CssText="color: gray; border-right: white 1px solid; border-top: white 1px solid; border-left: white 1px solid; border-bottom: white 1px solid"></OtherMonthDayStyle>
<CalendarStyle CssText="background-color: white; border-right: #7f9db9 1px solid; padding-right: 4px; border-top: #7f9db9 1px solid; padding-left: 4px; font-size: 9px; padding-bottom: 4px; border-left: #7f9db9 1px solid; padding-top: 4px; border-bottom: #7f9db9 1px solid; font-family: tahoma"></CalendarStyle>
<DisabledDayStyle CssText="color: gray; border-right: white 1px solid; border-top: white 1px solid; border-left: white 1px solid; border-bottom: white 1px solid"></DisabledDayStyle>
<MonthStyle CssText="font-size: 12px; margin-left: 14px; cursor: hand; margin-right: 14px; font-family: tahoma"></MonthStyle>
<PopupExpandEffect Duration="300" Steps="4" Type="Fade" />
<PopupCollapseEffect Duration="300" Steps="4" Type="Fade" />
</eo:DatePicker>
</td>
<td class="tdTitle">Finished</td>
<td>
<asp:CheckBox ID="CheckBox1" runat="server" Text=" " />
</td>
</tr>
<tr>
<td class="tdTitle">Notes</td>
<td colspan="3">
<asp:TextBox ID="TextBox1" runat="server" Width="100%"></asp:TextBox>
</td>
</tr>
<tr>
<td colspan="4" style="text-align:right; vertical-align:middle; height: 30px;">
<span style="padding-right:100px"><asp:LinkButton ID="LinkButton1" runat="server" OnClick="LinkButton1_Click">Submit this Sales Action</asp:LinkButton></span>
</td>
</tr>
</table>
</div>
</asp:Panel>
</eo:CallbackPanel>


function callbackExecRet(callback, output, vars){
wfl_DataTabLeadManagement_callBackServerConc('getdata', 0, $get('leadid').value);
}

I have seen other problems with invalid viewstate. Any ideas?

Hi,

Your code looks fine to me. I am not sure if you meant dynamically deleting/adding controls by "clear server controls" and "add some server controls" though. If that's the case, try set Visible to True/False instead. That way the control hierarchy does not change. Dynamically modifying control hierarchy is known to cause all sort of view state problems if not done correctly.

If the problem still occurs after that, we would need you to create a small project that reproduces the problem and we would be happy to take a look.

Thanks

Thanks for your quick reply!

By "clear server controls", i mean that I am just setting the values back to initial values:

ListBox1.SelectedIndex = -1;
DatePicker1.SelectedDate = DateTime.Now;
this.DropDownList1.SelectedIndex = -1;
CheckBox1.Checked = false;
TextBox1.Text = string.Empty;

This is so the user can add a new record without having the last values to clear.

Hi John,

The only difference between the CallbackPanel and a regular page update as for JavaScript concern is CallbackPanel can not execute the embedded JavaScript on the global scope. Most people will never run into that because they do not put JavaScript inside the CallbackPanel. As far as ClientSideAfterUpdate, there is nothing special about it ---- it’s a function you provide and we call it. So I do not believe it can be anything directly related to that.

Thus I would recommend you to look into your wfl_DataTabLeadManagement_callBackServerConc first. Try to replace it with an empty function and see if it works. From there you can gradually put your original code back and you should be able to find out the offending part. It might immediately make sense to both of us once we know what triggered it.

Thanks

Did some more research, here is what I have:

This is the postData from calling wfl_DataTabLeadManagement_callBackServerConc from a button. Note that the button and the control : DataTabLeadManagement are outside the eo callback panel... This postData will successfully triger a callback from my control.

"leadid=116990&leadzip=98450&__EVENTTARGET=&__EVENTARGUMENT=&eo_cb_id=&ctl00_ContentPlaceHolder1_CallbackPanel1_trigger=&ctl00_ContentPlaceHolder1_CallbackPanel1_param=&__eo_obj_states=&__VIEWSTATE=%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%2B1EWg%3D%3D&eo_version=4.0.43.2&ctl00$ContentPlaceHolder1$DropDownList1=&_eo_js_modules=%2FPSHPWeb%2Fscripts%2Feo_script%2Feo.d2f7e2b1-a1fe-4a28-9149-12a6b26d1eae.js%7Cu%7C%2FPSHPWeb%2Fscripts%2Feo_script%2Feo.5e683c6a-e624-405a-9fbd-e82c4dfad39d.js%7Cc%7C%2FPSHPWeb%2Fscripts%2Feo_script%2Feo.a415e878-e4e8-4ffb-b665-3435616b85be.js%7Cpop%7C%2FPSHPWeb%2Fscripts%2Feo_script%2Feo.fa5d3281-2e71-41af-b80c-0438746dd19e.js%7Cei%7C%2FPSHPWeb%2Fscripts%2Feo_script%2Feo.5db3cd0d-c4bd-4ade-b441-f8d3c7aa62f6.js%7Ce%7C%2FPSHPWeb%2Fscripts%2Feo_script%2Feo.22d99426-9230-4247-a531-f0a198965f0e.js%7Cme%7C%2FPSHPWeb%2Fscripts%2Feo_script%2Feo.51cbfb99-f6bf-4aa5-89a4-55e377ae8f30.js%7Ccd%7C%2FPSHPWeb%2Fscripts%2Feo_script%2Feo.1e9de512-6b3b-428f-941c-c03dcf17d244.js%7Cdd%7C%2FPSHPWeb%2Fscripts%2Feo_script%2Feo.7e2129f8-8ebe-451d-a1a6-694cdc211761.js%7Cdg&=10%2F24%2F2007%2009%3A46%20AM&ctl00$ContentPlaceHolder1$TextBox1=&__CALLBACKID=ctl00%24ContentPlaceHolder1%24DataTabLeadManagement&__CALLBACKPARAM=getdata%7C0%7C116990&__EVENTVALIDATION=%2FwEWGQLwreroBgL7jsehBALkjsehBALljsehBAK12e7wBAK8tsSeCAKttsSeCAK6trydCAK4tsSeCAK%2BtsSeCAK7tsSeCAK6trSdCAK5tsSeCAK6tqCdCAK6tridCAK6tsSeCAKitsSeCAK6trCdCAK%2FtsSeCAK6toidCAK6toydCAK6toSdCAL%2BzqO2BALc3uCnBAKP6PmbAaL1Nt9JUI5H5Z2C3rWWStjFW3X8"

This is the same call. However it is called from a timer that is initiated from ClientSideAfterUpdate="callbackExecRet" like this:

function callbackExecRet(callback, output, vars){
var v = setTimeout("goGetData()", 1000);
}
function goGetData(){debugger;
wfl_DataTabLeadManagement_callBackServerConc('getdata', 0, $get('leadid').value);
}

This fails to run the callback:

"leadid=116990&leadzip=98450&__EVENTTARGET=&__EVENTARGUMENT=&eo_cb_id=&ctl00_ContentPlaceHolder1_CallbackPanel1_trigger=&ctl00_ContentPlaceHolder1_CallbackPanel1_param=&__eo_obj_states=&__VIEWSTATE=%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%2B1EWg%3D%3D&eo_version=4.0.43.2&ctl00$ContentPlaceHolder1$DropDownList1=&_eo_js_modules=%2FPSHPWeb%2Fscripts%2Feo_script%2Feo.d2f7e2b1-a1fe-4a28-9149-12a6b26d1eae.js%7Cu%7C%2FPSHPWeb%2Fscripts%2Feo_script%2Feo.5e683c6a-e624-405a-9fbd-e82c4dfad39d.js%7Cc%7C%2FPSHPWeb%2Fscripts%2Feo_script%2Feo.a415e878-e4e8-4ffb-b665-3435616b85be.js%7Cpop%7C%2FPSHPWeb%2Fscripts%2Feo_script%2Feo.fa5d3281-2e71-41af-b80c-0438746dd19e.js%7Cei%7C%2FPSHPWeb%2Fscripts%2Feo_script%2Feo.5db3cd0d-c4bd-4ade-b441-f8d3c7aa62f6.js%7Ce%7C%2FPSHPWeb%2Fscripts%2Feo_script%2Feo.22d99426-9230-4247-a531-f0a198965f0e.js%7Cme%7C%2FPSHPWeb%2Fscripts%2Feo_script%2Feo.51cbfb99-f6bf-4aa5-89a4-55e377ae8f30.js%7Ccd%7C%2FPSHPWeb%2Fscripts%2Feo_script%2Feo.1e9de512-6b3b-428f-941c-c03dcf17d244.js%7Cdd%7C%2FPSHPWeb%2Fscripts%2Feo_script%2Feo.7e2129f8-8ebe-451d-a1a6-694cdc211761.js%7Cdg&=10%2F24%2F2007%2009%3A46%20AM&ctl00$ContentPlaceHolder1$TextBox1=&__CALLBACKID=ctl00%24ContentPlaceHolder1%24DataTabLeadManagement&__CALLBACKPARAM=getdata%7C0%7C116990&__EVENTVALIDATION=%2FwEWGQLYz7LrAQL7jsehBALkjsehBALljsehBAK12e7wBAK8tsSeCAKttsSeCAK6trydCAK4tsSeCAK%2BtsSeCAK7tsSeCAK6trSdCAK5tsSeCAK6tqCdCAK6tridCAK6tsSeCAKitsSeCAK6trCdCAK%2FtsSeCAK6toidCAK6toydCAK6toSdCAL%2BzqO2BALc3uCnBAKP6PmbARY3aa%2BimUfgIJg%2B5N3kxrwxYltZ"

Neither of these calls should involve the eo callback panel at all. The timer should seperate the second one.

Just for kicks, here is the postData from a page that does not have a eo callback panel and that triggers the callback on the control:

"userIDph=1003&dtName=ctl00_ContentPlaceHolder1_DataTab1&dd2=ctl00_ContentPlaceHolder1_DropDownList2&dd1=ctl00_ContentPlaceHolder1_DropDownList1&__EVENTTARGET=&__EVENTARGUMENT=&__VIEWSTATE=%2FwEPDwULLTEzOTE4OTI5MDMPZBYCZg9kFgICAw9kFgQCAQ8WAh4JaW5uZXJodG1sBRs8aDI%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%2F&=&=&=&=&=&=&ctl00$ContentPlaceHolder1$DropDownList1=&ctl00$ContentPlaceHolder1$DropDownList2=&eo_version=4.0.43.2&=&__CALLBACKID=ctl00%24ContentPlaceHolder1%24DataTab1&__CALLBACKPARAM=getdata%7C2%7C'rickenbach'%2C%20''&__EVENTVALIDATION=%2FwEWJALPypDUCAK12e7wBAK4tsSeCAK%2BtsSeCAK7tsSeCAK5tsSeCAK6tsSeCAKa8NDbCgLe58eUDwLF8OW%2FBQLR1fziAgKy3tXhAQLZ5%2FOUDwKOo6zVDgK1zMr%2FBAL2vfj%2BDgKz3qXiAQLxvfD%2BDgLe58OUDwLLlNJLAqrM2v8EAtHV%2BOICAsXwtb8FAsuU1ksCs96h4gEC3ufflA8CypTWSwL%2F%2FpaVCAKy3qHiAQLxvfT%2BDgLF8P2%2FBQLgmZqiAwLE8LW%2FBQKy3tnhAQLjmdKhAwKOo%2FDUDprxPeHfsGK6ptyYOLgM2cCtBkfs"

Any help here would be greatly appreciated.

Thanks,
john