Web Forms :: RequiredFieldValidator Created In External Object Is Null?
Apr 24, 2010
I have a registration form. Settings of this form, like which fields are required I get via webservice. So I need programatically validate this form. I decided to create variable count of requiered field validators in Submit click. The validator is created in external object that holds a field settings.
[Code]....
I tried to debug it and GetValidator() created RequiredFieldValidator, but in btnSubmitRegistration_Click after that, validator was null. Object lost it's reference. Where is the problem?
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Similar Messages:
Apr 30, 2010
Object reference not set to an instance of an object.
iam getting this Error Just created the controls as an null and how to create the object for reference
1) as my analysis i got the information that i need to create the object reference with new keyword but how to do it script using c#
public TextBox txtEventDate = null;
public Calendar calEventDate = null;
public Label lblResult = null;
protected void calEventDate_SelectionChanged (Object sender,EventArgs e)
{
this.txtEventDate = this.FindControl("txtEventDate") as TextBox;
this.calEventDate = this.FindControl("calEventDate") as Calendar;
txtEventDate.Text = calEventDate.SelectedDate.ToString ("d");
}
protected void btnSubmit_Click(Object Sender,EventArgs e)
{
this.lblResult = this.FindControl("lblResult") as Label;
lblResult.Text = "You Picked" + txtEventDate.Text;
}
</script>
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Jan 20, 2010
I'm creating several textboxes and dropdown controls. Some have a related RequiredFieldValidator control. The RequiredFieldValidator is created as follows:
[Code]....
This method is called from the following section of code which inserts rows into a table. Insert location is marked with a PlaceHolder control (ID="tblInsertRow").
[Code]....
When the user clicks the "Save" button, I force a validation of all validators as follows:
[Code]....
The problem I'm having is that Page.IsValid is always "true". I read some older posting that stated that you cannot use RequiredFieldValidator with AJAX, but I don't believe that's true anymore since I've done it before with static controls. This is the 1st time I'm trying to do this with controls created at runtime. These controls are created in a User Control that is displayed on a Page with a Master Page.
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Jan 11, 2010
I'm creating a static helper class for web services I'm writing. I'm tapping into the API of Telligent and therefore creating these Telligent "service" objects that allow me to do things with the platform. For example, I'm creating a MembershipSerice object in my helper class so I can do membership stuff with the same object. In my helper class I have a property with a getter that creates a new one of these objects:
private static MembershipService _MembershipService {
get return new MembershipService(path, usr, pwd);
[code]...
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May 17, 2010
m getting this error again and again. i m also using the ajax modalpopup extender in my page ..
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May 13, 2010
My 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>
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Dec 24, 2010
In my ASP.Net application, I am using ajax accordian control on my aspx page and vb.net for code behind pages.
I have used validation summary for page validation.
1st accordian Pane contains following fields:
First Name
Last Name etc.
2nd accordian Pane contain following fields:
Address
City
Country etc.
while validating the page It displays error messages in following sequence:
Address cannot be blank
City cannot be blank
Country.....
First Name....
Last Name....
But I want to display error messages in following order:
First Name cannot be blank
Last Name....
Address cannot be blank
City cannot be blank
Country.....
I tried to resolve it by giving tabIndex to textboxes and RequiredFieldValidator, but sequence doesn't change I created RequiredFieldValidator again in sequence, but it doesn't affect.
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May 10, 2010
[code]....
this code give that solution.but if any one of the field have null(example:r.urrQuickLinkRights contain the NULL) then only it will throw error like Object reference not set to an instance of an object.
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May 27, 2010
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.
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Oct 6, 2010
I want to dynamically create asp textbox objects (as well as other types) with id's named sequentially up to a number the user decides but I'm having a problem getting my code behind to recognize these dynamically created objects. In "div1" below I manually create the objects and I have no problem getting the values in Sub cmdSaveDiv1Info_Click. My dynamically created code generated in Page_Load routine is identical to that in "div1" except for the textbox ID's yet when I try to retrieve the values the same way in cmdSaveDiv2Info_Click I get an "object reference not set to an instance of an object" error on the "Dim d2Year as String.." line.
[code]....
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Nov 17, 2010
Im dynamically creating several dropdowns onclick of a button... but the dropdown returns null when im trying to get the values on submitting the form... i read tat during postback all dynamically created controls will be lost... s there a way to register the controls... i want to access the item selected in the dropdown .... expecting a positive reply...
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Feb 13, 2014
I have a asp.net page titled EstMaterials.aspx with a gridview that fills from a SQL table based on a parameter passed to it. The code for calling the form is below.
<asp:UpdatePanel ID="upAddMaterials" runat="server">
<ContentTemplate>
<div id="AddMaterials" style="text-align:center">
<asp:Button ID="btnDecoy" runat="server" Text="Decoy" style="display:none" />
<asp:LinkButton ID="lbAddMaterials" runat="server" Text="Add Materials"></asp:LinkButton>
[code]....
I have an a button field set as a link in a gridview. When the user clicks on the link it should open the "EstMaterials.aspx" page with a gridview listing the materials required for this job. If I do not have a parameter i.e, ScheduleWeek.oJob.JobSeqNbr, the gridview fills fine. However, with the parameter listed the gridview does not fill. It appears the form opens without ever looking at the parameter being passed.The page load event is below.
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not IsPostBack Then
If Not IsNothing(ScheduleWeek.oJob) Then
Dim tbl As New DataTable
[code]....
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Feb 19, 2010
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
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May 28, 2010
I'm experimenting with validating forms in the asp.net MVC framework. I'm focusing on server side validation for the time being. I've come across an error that I'm not sure how to rectify. System.NullReferenceException: Object reference not set to an instance of an object. The code that throws the error is:
[AcceptVerbs(HttpVerbs.Post)]
public ActionResult Create([Bind(Exclude="ID")] MembersCreate mc )
{
mc.Modules = ModuleListDataContext.GetModuleList();
ViewData.Model = mc;
//Validation using ModelState
//
//
//line below errors when form field is empty
//
if ((string)mc.Member.Username.Trim() == "")
ModelState.AddModelError("Member.Username", "Username is required.");
if (!ModelState.IsValid)
return View();
try
{
// TODO: Add insert logic here
return RedirectToAction("Index","Home");
}
catch
{
return View();
}
}
When I put spaces in the field it performs exactly as i want, but if I leave the field blank and press submit I get the error. What's the best way to avoid this error and still validate blank form fields?
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Nov 18, 2010
I have a user control with GridView. GridView template has label that suppose to get custom object value Name.
aspx:
<asp:Label ID="lblImage" runat="server" Text='<%# MyData.Name%>' />
cs:
public MyObject MyData;
During page loading MyData object is null, so I'm getting exception: "Object reference not set to an instance of an object.".
How to avoid the error?
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Nov 11, 2010
I have been experiementing with the annonymous types in C#, and am wondering if it would be possible to have a 'dynamic key' in the annonymous object.Here is what I have so far:
[Code]....
[ { "monday": true } ] what I am getting: [ { "temp": true } ]Is there a way to have the object's 'key' be dynamicly created? What I want it to be able to send the KeyValuePair's key as the object's key. Is this possible?
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Jan 4, 2011
let's say I have an entity (based on a SQL Server table) that I'll call "Schedule." This entity includes the following columns:
DateID -- identity integer column, primary key
StartDate -- DateTime column
EndDate -- another DateTime column.
Let's say I add new data as follows: [Code]....
If I'm not mistaken, I believe that once the EF.SaveChanges() executes, a new entry is created, and a new DateID is generated.I need to get that new DateID.
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Nov 27, 2010
First time I do it this way, so probably something simple I don't know about. Think the following code explain the "issue" better than I could.
[Code]....
Basically, if I leave out the _logService instantiation in Application_Error, I get an object reference not set error.However it work fine in Application_End.While I'm at it (know I should start a seperate thread). Any good article to log application errors in Application_Error? (I want to keep the logger out of "catch" blocks" in my classes.) the following does not work out so well for me (Server.LastError are always null):
[Code]....
Probably how MVC's Handle error attribute deal with things...lemme google on.
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Nov 16, 2010
I have an already created DataTable object which i am using for my girdview (asp.net) i also need to bind a column of that object to a DropDownList. The datatable has the correct details in the column but the column contains more that 1 of the same name in the column - hence I would love to just do some kind of SELECT DISTINCT on the datatable and copy it to a new datatable for use with binding the dropdown.
This would allow me to save resources by making another trip to the database.
Here is an example, the current datatable has a column called items and in this column has the following entries
1
1
1
1
5
5
6
And of course i need only unique items for binding to my dropdown, hence i need the following data
1
5
6
Of course i don't want to change the original datatable object but rather make a copy of it will the new details.
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Jan 18, 2010
I have a page, Default.aspx, with its own code-behind file like this:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class _Default : System.Web.UI.Page
{
public int[] anArray;
}
What I'd like to do is access to "anArray" from a C# class (not tied to a page) declared in App_Code folder. What can I do?
Edit: As said in the first comment, I really apreciate your about refactoring my connection objects. However, what I'm really doing here is to rewrite an old PHP application in order to get comfortable with basic C# and ASP.NET, so this code will never go really live. So, I'm still intersted in a way (if any) to access an object declared in a code-behind code from a standard C# class.
Edit2: I removed the OdbcConnection object in order to focus to the real problem: how to refer to an object istantiated in a code-behind file from a C# class situated in App_Code?
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Jan 14, 2010
I have a gridview,when i do it is giving me null object reference error.
I am posting my code for your reference -
[Code]....
My gridview code is -
[Code]....
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Aug 30, 2010
I have a variable FirstThreads of type List<Thread>. I am trying to do the following, but FirstThreads is always null.
FirstThreads.AddRange(Threads.Skip<Thread>(PageIndex * PageSize)
.Take<Thread>(PageSize));
I can't do this:
FirstThreads = FirstThreads.AddRange(Threads.Skip<Thread>(PageIndex * PageSize)
.Take<Thread>(PageSize));
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Jun 28, 2010
I have searched the vast information highway and found nothing but road blocks!I have created a simple web application that calls a COM object like we've all done before. Well this time, the COM interop don't want to work due to DCOM Identity CRISIS. The only way I can get it to work is to physically log in to the web server and thenrun my web application.
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Apr 29, 2010
I have a <script> that contains this line: var tbl = document.getElementById("<%= this.tblSelection.ClientID %>"); but tbl always ends up being set to null. The table is declared like this:
<asp:Table ID="tblSelection" runat="server" CellPadding="2" CellSpacing="0"
cols="1" style="position: absolute; top: 0%; right: 0%">
Both the script and the table are in the same master page file. What could be causing this? I should mention that this script is executed on onload
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Apr 23, 2010
I think thaAjaxControlToolkitTextBoxWrapperThis use to work, but I think that upgrading to te latest version of teh Toolkit (4 something) broke it:
var txtExpireYear = document.getElementById("ctl00_phPageContent_dtmPassportExpirationDate_txtYear");
txtExpireYear.AjaxControlToolkitTextBoxWrapper.set_Value(dtmDateOfExpire.getFullYear());
I now get the error:
Microsoft JScript runtime error: 'AjaxControlToolkitTextBoxWrapper' is null or not an object
Executing this:
txtExpireYear.innerText="value1"
txtExpireYear.value="value2"
results in the watermark text being changed, not the textbox's text.
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