Rank: Member
Groups: Member
Joined: 6/12/2013
Posts: 13
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I have a Callback Panel on an ASP.Net page that contains a Literal control. The page loads fine, and I can execute the callback successfully once, but for some reason on the second time a JavaScript error is thrown and you cannot run the callback after that. This isn't a publicly accessed page but I'll try to post as much of it as I can here. I'm working with EO.Web.dll version 11.0.49.2. ERROR:
Unhandled exception at line 6, column 9537 in http://localhost:62738/eo_web.ashx?id=492ae872-49fe-4aa5-8344-a89683bc3b1a
0x800a138f - JavaScript runtime error: Unable to set property 'value' of undefined or null referenceAnd the highlighted line looks like...
Code: JavaScript
EO1149.g.s.__EVENTTARGET.value="";
Here are the relevant bits of code...
Code: HTML/ASPX
<eo:CallbackPanel runat="server" ID="cbpScript">
<asp:Literal runat="server" ID="litJSONData"></asp:Literal>
</eo:CallbackPanel>
Code: JavaScript
function loadView(tf) {
eo_Callback(cbpScript_ci, 'LOAD@' + $("#hidTimeFrame").val() + '@' + tf + '@' + $("#ddlProp").val());
};
Code: Visual Basic.NET
Private Sub cbpScript_Execute(sender As Object, e As EO.Web.CallbackEventArgs) Handles cbpScript.Execute
Try
Select Case UCase(e.Parameter.Split("@")(0))
Case "LOAD"
Dim tf As New Date(CInt(e.Parameter.Split("@")(1).Split("/")(1)), CInt(e.Parameter.Split("@")(1).Split("/")(0)), 1)
tf = tf.AddMonths(e.Parameter.Split("@")(2))
Dim jobid As Integer = CInt(e.Parameter.Split("@")(3))
BuildJSONData(tf, jobid)
End Select
litJSONData.Text &= "<script type=""text/javascript"">loadForm();</script>"
Catch ex As Exception
Greystar.Core.Logging.LogController.SaveLog(AppGlobal.AppName, Greystar.Core.Logging.LogTypes.ApplicationError, ex.ToString, "Draw.aspx.vb - cbpScript_Execute", Session("associateid"), Session("userid"))
End Try
End Sub
Any help or insight you can throw at me would be greatly appreciated.
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Rank: Administration
Groups: Administration
Joined: 5/27/2007
Posts: 24,196
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Hi, Your code looks fine to us. The problem that you are running into indicates that the form's __EVENTTARGET variable is gone. Which should not happen for an ASP.NET page but it's possible to make it happen with JavaScript. Below is an extreme example of how this can happen:
Code: JavaScript
//Get the form element
var form = document.getElementById("form1");
//Clear everything inside the form
form.innerHTML = "";
The above code will clear everything inside the form and cause our code to fail. So you might want to check whether you have similar code on your end. Thanks!
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