Checking For Empty Array - Get Object Refernce Set To Null Error
Oct 19, 2010How do i check for empty array?
If I write
If Not ls_filename.Length = 0 then
....
End If
I get object refernce set to null error
How do i check for empty array?
If I write
If Not ls_filename.Length = 0 then
....
End If
I get object refernce set to null error
I'm getting the object refernce not set to an instance of an object error in the code below.I couldnt figure it out, where I'm going wrong.VB.NET Syntax (Toggle Plain Text)
View 3 RepliesIs there one simple test that a person can do that covers all options where there could be a null, or "" value. When I google, I see so many options. I see:
if txtBox1.text IsNot nothing
if txtBox1.text.toString isNot nothing
if txtBox1.text <> ""
if txtBox1.text.toString <> ""
if isNull(txtBox1)
Is there on test that can cover them all?
I have a simple linq query that queries the database, where QueryString = a value.
[Code]....
My issue is, if the query does NOT return any results, as the the data does not exsist in the table, hence returns 0 rows, it throws up an error which i understand. However, i have tried a few ways to check if the object has been created in the firstplace but to no vail. I have used Isnothing and DBnull but could not get it to work.
.NET noob here (as in I know next to nothing, I'm trying to pick up some of the scraps left by my developer). Ok, I am getting this error on a number of my .aspx pages: Error while checking url '/': Key cannot be null. Parameter name: key Interestingly, I get this on my homepage on which the only .NET code is in the form of two includes, e.g: <% Response.WriteFile("/includes/footer.aspx") %> These includes in themselves only contain HTML, so I assume the issue can only be related to these or a configuration issue?
View 4 RepliesI have the following code
[Code]....
But I get Object refernce not set to instance of an object error at
If Not ls_case_no.Length = 0 Then
What if statment should I use? - I want if there is no value in ls_case_no array then the if stmt should not be executed
i have an application wherein i have incorporate a "Remember Me" feature for the login screen. I do this by creating a cookie when the user logs in for the first time, so next time when the user visits the site i get the cookie and load the user information.
i have written the code for loading user information in a common class in the App_Code folder...and all my pages inherit from this class.
code for loading the user info is as follows:
public static void LoadUserDetails(string emailId)
{
UsersEnt currentUser = UsersBL.LoadUserInfo(emailId);
if (currentUser != null)
HttpContext.Current.Session["CurrentUser"] = currentUser;
}
Now the problem is i get an "Object reference" error when i try to store the currentUser object in the session variable (even though the currentUser object is not null). However the password property in the currentUser object is null.
Can anyone explain to me why this first example works fine but the second, which would use a little less code and in my mind appears to achieve the same result, yet throws a null ref error?
This works ...
if (Session["sid"] == null || Session["sid"].ToString() == "")
{
// session is NOT valid.
}
else
{
// session is valid.
}
This does not work?
if (String.IsNullOrEmpty(Session["sid"].ToString()))
{
// session is NOT valid.
}
else
{
// session is valid.
}
I have a WSDL: [URL] (I have changed address location).
My code is for accessing data from SAP via WSDL; bind that to .NET control as well as sending data from .NET control to SAP via same WSDL.
The code is like below:
[Code]....
On the other way, When I am binding data with .net control at from load event then there is a no problem.
The code is like below:
[Code]....
m getting this error again and again. i m also using the ajax modalpopup extender in my page ..
View 3 RepliesMy site was woking fine, now i noticed that i get an error "Microsoft JScript runtime error: 'null' is null or not an object" when i checked the view source, i saw the following system generated code
<script type="text/javascript">
var Page_ValidationActive = false;
if (typeof(ValidatorOnLoad) == "function") {
ValidatorOnLoad();
function ValidatorOnSubmit() {
if (Page_ValidationActive) {
return ValidatorCommonOnSubmit();
}
else {
return true;
}
WebForm_AutoFocus('txtMailAddress');// --> IS THIS RIGHT???? out side the braces???
</script>
</form>
</body>
</HTML>
and a reference to this line below
<IFRAME id="__hifSmartNav" name="__hifSmartNav" style="display:none" src="/m2qa/WebResource.axd?d=fvL5WUdiCo1B4KvdiJfkfg2&t=633546432952161750"></IFRAME>
My code is:
[code]....
When I run the program, an error occurs:
Unable to cast object of type 'System.Collections.Generic.List`1[System.Int32]' to type System.Int32[]'.
Why does this error occur?
I am declaring a list in my class, populating the list in page load and using the list in various methods in this class. But, I get this error at every instance where I use this list in the methods. Error: System.NullReferenceException: Object reference not set to an instance of an object.
public partial class ViewBG1 : HealthServicePage
Ik keep getting this sort of errors when using Ajax controls.The colorpicker extender and the Cascaded dropdown generate this kind of error in my application.I have a scriptmanager in my masterpage.I already tried using a scriptmanager proxy.What could cause these errors?I have the controls inside template fields of data presentation controls.
View 2 RepliesWhile using blockUI function of Jquery I am getting below Error:
parentNode is Null Or not an object I am display a div using the below code
$.blockUI({message:$('#divID')});
First time it will execute nicely but second time it gives error.
While testing an AJAX enabled web app I sometimes stumbled upon this script error: 'this.get_element().style' is null or not an object. It was a hard nut to crack this one.This was the actual message
'this.get_element() is null or not an object'
The situation:AJAX Enabled web app using slider extenders . In some circumstances a script error is generated. In most cases it is not.
The reason:It turned out that the error happens at times when a new Postback is triggered while a previous one hasnt finished yet. That is quickly changing the sliderhandle's position in this scenario. The Postback where triggered because i had set the AutoPostBack property of the extended TextBox to "true".I have some code running inside the event handler
I am working on ASP.NET 3.5, c#, visual studio 2010. I have made a master file and a default page that uses this master file. I have placed a couple asp:contentplaceholders in the master and corresponding code in the page that uses this master. I have also inserted JavaScript like this in the content page (and not the master):
<asp:Content ID="Content6" ContentPlaceHolderID="Mainpage" Runat="Server">
<script src="path1" type="text/javascript"></script>
<script src="path2" type="text/javascript"></script>
<script type="text/javascript">
$(document).ready(function () {
var options = {
//some java code
};
$(".mycssclass").effect(options);
});
</script>
</asp:Content>
On running the website I get the following runtime error in visual studio: Microsoft JScript runtime error: 'this.node' is null or not an object and it point to some function inside the JavaScript like this.node.onload=function(){..............//I am not a java guy so do not know much about this Where am I going wrong? Why does the site compile correctly but throw this runtime error? I also tried inserting this java code inside the master file in the <head>, but same error.
if i implement updateprogress in my web page i got the following error messge
Microsoft JScript runtime error: 'Sys.WebForms.PageRequestManager' is null or not an object
.aspx
<link
href="cssUpdateProgress.css"
rel="stylesheet"
type="text/css"
/>
<script
type="text/javascript"
language="javascript">
var ModalProgress =
'<%= ModalProgress.ClientID %>';
</script>
<asp:ScriptManager
ID="ScriptManager1"
runat="server"
EnablePartialRendering="False"
LoadScriptsBeforeUI="False"
ScriptMode="Release"
>
<
</asp:ScriptManager>script
type="text/javascript"
src="jsUpdateProgress.js"></script>
<asp:Panel
ID="panelUpdateProgress"
Width="105px"
Height="25px"
runat="server"
CssClass="updateProgress">
<asp:UpdateProgress
ID="UpdateProg1"
DisplayAfter="0"
runat="server">
<ProgressTemplate>
<table
style="height:25px;">
<tr><td><img
height="21px"
width="15px"
src="imagesprocessing.gif"
style="vertical-align: middle"
alt="Processing"
/></td><td
valign="middle"
>Processing...</td></tr>
</table>
</ProgressTemplate>
</asp:UpdateProgress>
</asp:Panel>
<cc1:ModalPopupExtender
ID="ModalProgress"
runat="server"
TargetControlID="panelUpdateProgress"
BackgroundCssClass="modalBackground"
PopupControlID="panelUpdateProgress"
/>
javascript
Sys.WebForms.PageRequestManager.getInstance().add_beginRequest(beginReq);
Sys.WebForms.PageRequestManager.getInstance().add_endRequest(endReq);
function
beginReq(sender, args) {// shows the Popup
$find(ModalProgress).show();
}
function
endReq(sender, args) {// shows the Popup
$find(ModalProgress).hide();
}
I had to exclude several pages from my website to get it to run in vs 2008. When I finally got the home page to come up, I tried to type a character into the login box, and at the first character the probelm blows up:
Microsoft JScript runtime error: 'keyCode' is null or not an object
This is insanse. This is the page I'm on when it crashses. Does this have something to do with ajax?
[Code]....
I have setup my business object to have a create_date and edit_date members both datetime datatypes. My company want to display the create_date and edit_date fields in a gridview for each transaction. The problem i have is that after insterting a record it will have a valid create_date but no edit_date and when displayed in the gridview it defaults to datetime.minvalue (My default). How on earth do i show an empty field in my gridview for a null datetime field in the database?
I am using similar architecture to the Imar Spaanjaars example of a tiered solution. With a few small tweeks it has worked well for me for ages. I am passing a List<Database> to my object datasource which connects to my gridview.
When trying to use the editor control i'm getting the following error:
Value cannot be null or empty.
Parameter name: elementID
Here's my HTML:
[code]....
I'm using asp.net 4 with ajax control toolkit for version 4.
I believe the error is talking about the routing I have. Is there something special I have to do if I want to use the toolkit and custom routing?
I am hiding a TextBoxin my aspx page like this: myField.visible=false; Now I have a DropDown as well which tries to access the TextBox on IndexChange. The problem is, it cant access the hiffen TextBox and I am getting document.form[0] is Null or Not an Object. How can I solve that? Is the some check for that in JavaScript?
View 1 RepliesThis is the following structure of my solution explorer.
base directory -> i have a login.aspx and a reference directory which refers to ajax toolkit. The ajax toolkit works fine here.
private directory -> i have my homepage but the ajax toolkit doesn't work here. the above error is shown at this location :-
(function() {var fn = function() {$get('ToolkitScriptManager1_HiddenField').value = '';Sys.Application.remove_init(fn);};Sys.Application.add_init(fn);})();Sys.Application.initialize();
Sys.Application.add_init(function() {
$create(Sys.Extended.UI.TabPanel, {"headerTab":$get("__tab_TabContainer1_TabPanel1"),"ownerID":"TabContainer1"}, null, {"owner":"TabContainer1"}, $get("TabContainer1_TabPanel1"));
});
I have one web.config in the private folder . This is the structure :-
<configuration>
<appSettings/>
<connectionStrings/>
<system.web>
<authorization>
<deny users="?" />
<allow users="*" />
</authorization>
</system.web>
</configuration>
If i allow all users to access this folder or remove this web.config file, then the ajax toolkit works. I need to protect this folder and i am using form authentication. Could someone point me where i went wrong. Kindly keep in mind that i am new to asp.net.
i use accordion from ajax toolkit it work correctly when i use outputcash it gives me this error:
Microsoft JScript runtime error: 'Sys.Extended.UI' is null or not an object
[Code]....
I am getting this error in my UpdatePanelAnimationExtender. it onluy happens when i se controls that are outside gridview?
View 2 Replies