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Search found 18153 results on 727 pages for 'null coalescing'.

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• Silverlight 4 toolkit, charting and lineSeries is null

  - by Snake

  Hi, I create a Silverlight Chart, with the Silverlight 4 toolkit, the April release. Consider the following chart: <Grid x:Name="LayoutRoot" Background="White"> <Charting:Chart Title="Chart to test" Name="MySuperChart"> <Charting:LineSeries x:Name="MyLineSeries" Title="Something" /> </Charting:Chart> </Grid> So far so good. I can access the Series in the chart by MySuperChart.Series[0] But when I try to reference MyLineSeries, it appears to be null. Full view

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• execcommand("SaveAs",null,"file.csv") is not working in IE8

  - by anbu

  var doc = w.docment; doc.open('application/CSV','replace'); doc.charset = "utf-8"; doc.write("all,hello"); doc.close(); if(doc.execcommand("SaveAs",null,"file.csv")) { window.alert("saved "); }else { window.alert("cannot be saved"); } not working in IE 8 but woks in IE 6 what is the problem ? it is alerting "cannot be saved" help me !!! advance thanks

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• jQuery .post gets null data

  - by Andrew Flusche

  Hey everyone. This is my first post here, so I hope I'm doing it appropriately. I have several jQuery $.post calls that work just fine. They send data to a PHP script that modifies a database and returns some data. No problem. But this one doesn't work. The returned data is just NULL. $.post("act_addTaskLog.php", {description: $("#logFormDescription").val(), complete: $("#logFormComplete").is(':checked'), taskId: $("#logFormTaskId").val(), user: <?php echo $_SESSION['user']; ?>}, function(data) { alert("data: " + data); } ); I've tried everything I can think of, to no avail. I've even tried just one line in my PHP script: die("true"); Firebug shows that the script is being executed, but it's not completing. The alert message displays just with the label "data:" in it, no actual data. Thanks in advance for your help!

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• CommandBinding CanExecute always null

  - by developer

  Hi All, I am using CommandBinding to display visibility of a button. Below is my code <UserControl.CommandBindings> <CommandBinding Command="{x:Static local:AttendeePanel.LaunchAttEditor}" Executed="LaunchAttEditor_Executed" CanExecute="CanCreateProfile"/> </UserControl.CommandBindings> <Button Content="Create Profile" Command="local:LaunchEditor" CommandParameter="{Binding Profile}" Name="BtnCreate"> My problem is that CanExecute method always gets null as parameter even though I am binding the parameter to Profile. Is there a way I can set Data Context? or is this because the canexecute runs before data load?

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• Why is my movie clip instance null?

  - by Khan

  I have 2 movie clips in my scene, one is charlie brown running and another is lucy lifting a football. The movie clip instances are aptly named: lucyLifting and charlieRunning. When I get to frame 75, I run the following code: stop(); trace(lucyLifting); trace(charlieRunning); lucyLifing.stop(); charlieRunning.stop(); and I get the following output: [object MovieClip] null Why isn't it recognizing my second movie clip instance? This is very frustrating.... Thank you in advance.

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• ListView FocusedItem Becomes NULL

  - by Andy and Tyler

  When the program runs, there is a series of ListView forms. We populated one of them with items (as strings) and we check whether the state of selection has changed. Once it's changed, we grab the text of the selected item using FocusedItem.Text. The first time works just fine but when another selection is made, the selected item returns as null. The only way we can temporarily get around this issue is to clear and repopulate the form. The disadvantage is that we lose the highlighted item. There got to be another way around this. Maybe we're not clear on how ListView really works? Any ideas?

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• NULL values in object properties in Entity Framework

  - by Tony

  Tables: Article, Author, Comment (1 article and 1 author can have * comments) In the database is 1 article, 1 author and 1 comment. The problem is, that code myBD my_bd = new myBD(); var articles = by_bd.Article; works OK, I can see that an Author and an Article has 1 comment. But that code var comm = (from u in my_bd.Comment where ...... select u); returns the comment but it has NULL values in property Article and Author. Why ?

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• java.lang.IllegalStateException: Parent was not null, but this component not related

  - by Muneeswaran Balasubramanian

  Hi to all, I have the following exception at the time of running jsf program. org.apache.jasper.JasperException: An exception occurred processing JSP page /pages/general/internalServerErrorPage.jsp at line 44 41: <link rel="shortcut icon" href="<%=request.getContextPath()%>/resources/images/infomindzicon.ico" type="image/x-icon" /> 42: </head> 43: <body id="sscmsMainBody"> 44: <h:form id="internalServerErrorPageForm" binding="#{ServerErrorBean.initForm}"> 45: <rich:page id="richPage" theme="#{LayoutSkinBean.layoutTheme}" 46: width="#{LayoutSkinBean.layoutScreenWidth}" 47: sidebarWidth="0"> Caused by: javax.servlet.ServletException: javax.servlet.jsp.JspException: java.lang.IllegalStateException: Parent was not null, but this component not related at org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:858) at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:791) at org.apache.jsp.pages.general.internalServerErrorPage_jsp._jspService(internalServerErrorPage_jsp.java:207) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:377) What is the meaning of this exception and how can i resolve this?Please help me.Thanks in advance.

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• jQuery autocomplete pass null paramter to the controller in ASP.NET MVC 2

  - by myaesubi

  I'm using jQuery autocomplete plugin from jQuery website calling the controller url which return json in return. The problem is the parameter sent to the controller is always null. Here is the in-browser jQuery code for the autocomplete: $(document).ready(function() { var url = "/Building/GetMatchedCities"; $("#City").autocomplete(url); }); and here is the ASPNET MVC controller signature in C#: public JsonResult GetMatchedCities(string city) { .. return this.Json(query, JsonRequestBehavior.AllowGet); } Thanks in advance, Mohammad

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• DataSet.GetXml not returning null results

  - by pistacchio

  Hi, whenever I convert a DatSet into an XML with DataSet.GetXml, any null value is ignored, so, where i expect this: <value1>a</value1> <value2></value2> <value3>c</value3> I get this instead: <value1>a</value1> <value3>c</value3> Any quick and dirty way to handle this? Thanks EDIT: I think a solution would be using WriteXml. Could anyone provide me with a sample of using it WITHOUT writing to a file but getting a string just like GetXml does? Thanks

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• Filtering DBNull With LINQ

  - by Steven

  Why does the following query raise the error below for a row with a NULL value for barrel when I explicitly filter out those rows in the Where clause? Dim query = From row As dbDataSet.conformalRow In dbDataSet.Tables("conformal") _ Where Not IsDBNull(row.Cal) AndAlso tiCal_drop.Text = row.Cal _ AndAlso Not IsDBNull(row.Tran) AndAlso tiTrans_drop.Text = row.Tran _ AndAlso Not IsDBNull(row.barrel) _ Select row.barrel If query.Count() > 0 Then tiBarrel_txt.Text = query(0) Run-time exception thrown : System.Data.StrongTypingException - The value for column 'barrel' in table 'conformal' is DBNull. How should my query / condition be rewritten to work as I intended?

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• PRoblem with select null option

  - by Massimo Ugues

  Hallo all. I got a strange problem with this piece of code Seleziona text 1 test 2 The correct behaviour is that with this html the selected option is the "Seleziona" On some browser when i render this html the first option is blank and if I select the value jQuery("#nazioni").val() I got null value. Where is the problem? With the select option in this state I cannot set any values via jquery or via any other plugin. jQuery("#nazioni option:first").attr("selected", "selected"); does not work. I tried to use the textotela plugin (http://www.texotela.co.uk/code/jquery/select/) but if i remove the first option in this way jQuery("#nazioni).removeOption(0) it removes the "Seleziona" value. Any idea? Kind regards Massimo

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• Jquery ajax success function returns null?

  - by udaya

  I use the following the jquery statements to call my php controller function, it gets called but my result is not returned to my success function.... function getRecordspage() { $.ajax({ type: "POST", url:"http://localhost/codeigniter_cup_myth/index.php/adminController/mainAccount", data: "{}", contentType: "application/json; charset=utf-8", global:false, async: true, dataType: "json", success: function(result) { alert(result); } }); } My controller method, function mainAccount() { $_SESSION['menu'] = 'finance'; $data['account'] = $this->adminmodel->getaccountDetails(); if(empty($data['account'])) { $data['comment'] = 'No record found !'; } $json = json_encode($data); return $json; } I get the alert(1); in my success function but my alert(result); show null... Any suggestion...

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• "'data(...).options' is null or not an object" in jquery-ui

  - by ripper234

  I'm using jquery-ui 1.8, and getting this error in Internet Explorer: Webpage error details User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E) Timestamp: Mon, 10 May 2010 06:26:48 UTC Message: 'data(...).options' is null or not an object Line: 75 Char: 13074 Code: 0 URI: http://localhost:58365/Scripts/Lib/jquery-ui-1.8.custom.min.js Is this a known bug? Is there a workaround? The error happens when I use droppable/draggable.

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• jquery json null when using localhost

  - by Eeyore

  I am trying to load json generated by my django app. It works when I save the json output and load it from a static file. However, when I make a call to a server it returns null. JSON {"users": [ { "id": 1, "name": "arnold" }, { "id": 2, "name": "frankie" } ]} Ajax call $.ajax({ url: "http://localhost:8000/json", //vs. json.js dataType: 'json', type: 'get', timeout: 20000, error: function() { alert("error"); }, beforeSend: function() { alert("beforeSend"); }, complete: function() { alert("complete"); }, success: function(data) { alert(data.users[0].name); } }); view.py return HttpResponse(simplejson.dumps(data), content_type = 'application/json; charset=utf8')

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• Change the null placeholder in a Cocoa binding?

  - by Monolo

  Is there a way to change (for the purpose of localization) the null placeholder in a binding in Cocoa? The bindings are set up in Interface Builder for a popup button. The two-way nature of the bindings as set up in IB is needed, so doing it programmatically is not really appealing. I am aware that the standard way of handling localizations of a nib file is by making one for each language, but since this is the only difference in the whole nib file between the language versions, it seems a bit excessive for a single string. If there is a way to modify a binding created in IB, I was thinning about doing it in the file's owner's awakeFromNib method.

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• SyndicationItem.Content is Null

  - by kdmurray

  I'm trying to pull the contents of an RSS feed into an object that can be manipulated in code. It looks like the SyndicationFeed and SyndicationItem classes in .NET 3.5 will do what I need, except for one thing. Every time I've tried to read in the contents of an RSS feed using the SyndicationFeed class, the .Content element for each SyndicationItem is null. I've run my feed through FeedValidator and have tried this with feeds from several other sources, but to no avail. XmlReader xr = XmlReader.Create("http://shortordercode.com/feed/"); SyndicationFeed feed = SyndicationFeed.Load(xr); foreach (SyndicationItem item in feed.Items) { Console.WriteLine(item.Title.Text); Console.WriteLine(item.Content.ToString()); } Console.ReadLine(); I suspect I may just be missing a step somewhere, but I can't seem to find a good tutorial on how to consume RSS feeds using these classes.

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• Control within ascx is null when ascx is added from codebehind

  - by Snoop Dogg

  I am having difficulties how to construct my question, but if I have to put it simply the situation is that I have categories of products. I have an aspx with a repeater on the left that lists the categories. And I want the products to be listed on the right. Category number is variable so I made an ascx with a DataList in it. When I try to do foreach category, ascx = new ascx(); then the DataList within this ascx control is null. ps: what I want to do is to preload all the products (thre is not much) and hide the divs and fadein fadeout them using jQuery when a category div is clicked. rightnow it is using jQuery.load(); and I don't like how the images load, cuz they download from top to bottom. Progressive gifs alsdo not an option. site demo is here http://techlipse.net/test/ledart Thanks a lot in advance...

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• Trying to Nullify Django model fields with method where model and fields are parameters

  - by Johnny4000

  I'm trying to write a method like the below where a list of fields (a subset of all the fields) is passed in as a parameter and has their column values set to null. I would be happy of I could get a method with just the fields as a parameter like below, but having the model as a parameter would be even better. from my_project.my_app.models import MyModel def nullify_columns (self, null_fields): field_names = MyModel._meta.get_all_field_names() for field in field_names: if field in null_fields: # The below line does not work because I'm not sure how to # dynamically assign the field name. MyModel.objects.all().update( (MyModel.get_field(field).column) = None) Right now I have something like if 'column1' in list_of_fields: MyModel.objects.all().update(column1 = None) if 'column2' in list_of_fields: MyModel.objects.all().update(column2 = None) etc. which is horrible, but works.

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• SSRS function returns #Error if value of field is null

  - by jen-fields

  Thanks in advance for any and all assistance. My code is: Public Function StripHTML(value As String) As String Return System.Text.RegularExpressions.Regex.Replace(value, "<(.|\n)*?", "") End Function Then I call the function from a textbox. This works great unless there are nulls in the dataset. I tried to compensate for the nulls, but the RDLC file generates an error message that it can't display the subreport. Public Function StripHTML(value As String) As String if isnothing(value) then return value else Return System.Text.RegularExpressions.Regex.Replace(value, "<(.|\n)*?", "") end if End Function I also tried to tell it to return " " if null. I had no luck... Any ideas? and thanks again.

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• MooTools Fx.Slide throwing this.element is null

  - by Brant

  The following code is throwing the error "this.element is null". However, the wid_cont is definitely grabbing an element. window.addEvent('domready',function(){ var min = $(document.body).getElements('a.widget_minimize'); min.addEvent('click', function(event){ event.stop(); //var box = ; var wid_cont = ($(this).getParents('.widget_box').getElement('.widget_box_content_cont')); var myVerticalSlide = new Fx.Slide(wid_cont); myVerticalSlide.slideOut(); } ); }); It's moo tools 1.2.4 and has the fx.slide included....

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• Unable to reverse seemingly simple rails migration - getting "altered_table.column may not be NULL"

  - by brad

  I have a table 'invoices' in my development database (sqlite3) populated with a small amount of test data. I wanted to add a column 'invoice_number' to it and set up a migration like so: class AddInvoiceNumberColumnToInvoices < ActiveRecord::Migration def self.up add_column :invoices, :invoice_number, :integer end def self.down remove_column :invoices, :invoice_number end end I ran rake db:migrate and it seemed to migrate just fine. However, when I tried to access this column through ActiveRecord it didn't seem to be there. I decided to undo this migration and try again (not sure what I was going to try but I thought I'd start by undoing it) with rake db:migrate VERSION='whatever_the_migration_before_this_one_was_called'. This failed with the error message == AddInvoiceNumberColumnToInvoices: reverting =============================== -- remove_column(:invoices, :invoice_number) rake aborted! An error has occurred, this and all later migrations canceled: altered_invoices.invoice_number may not be NULL I can't find any documentation of this error. Is anyone able to explain what I have done wrong, and more importantly how I can fix this?

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• Can Microsoft store three-valued fields in a single bit?

  - by fenomas

  I'm completely ignorant of SQL/databases, but I was chatting with a friend who does a lot of database work about how some databases use a "boolean" field that can take a value of NULL in addition to true and false. Regarding this, he made a comment along these lines: "To Microsoft's credit, they have never referred to that kind of field as a boolean, they just call it a bit. And it's a true bit - if you have eight or fewer bit fields in a record, it only requires one byte to store them all." Naturally that seems impossible to me - if the field can hold three values you're not going to fit eight of them into a byte. My friend agreed that it seemed odd, but begged ignorance of the low-level internals and said that so far as he knew, such fields can hold three values when viewed from the SQL side, and it does work out to require a byte of storage. I imagine one of us has a wire crossed. Can anyone explain what's really going on here?

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• BlackBerry - video player - FramePositioningControl is null

  - by sinu-mathews

  I'm developing a blackberry application that plays video from the server. I've used Player.start() and Player.stop() for playing and pausing a video. But I also need rewind, forward and seek bar controls in my application. I tried using FramePositioningControl for these controls. But the following code is returning null. FramePositioningControl framePositioningControl = (FramePositioningControl) player.getControl("FramePositioningControl"); I searched several forums and they say many players do not support FramePositioningControl. What players support FramePositioningControl? And what else should I do to add these controls in my application?

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• @OneToMany property null in Entity after (second) merge

  - by iNPUTmice

  Hi, I'm using JPA (with Hibernate) and Gilead in a GWT project. On the server side I have this method and I'm calling this method twice with the same "campaign". On the second call it throws a null pointer exception in line 4 "campaign.getTextAds()" public List<WrapperTextAd> getTextAds(WrapperCampaign campaign) { campaign = em.merge(campaign); System.out.println("getting textads for "+campaign.getName()); for(WrapperTextAd textad: campaign.getTextAds()) { //do nothing } return new ArrayList<WrapperTextAd>(campaign.getTextAds()); } The code in WrapperCampaign Entity looks like this @OneToMany(mappedBy="campaign") public Set<WrapperTextAd> getTextAds() { return this.textads; }

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