when i am declaring my connection string i am getting error below is my connection string
[Code]....
the error is A field initializer cannot reference the non-static field, method, or property 'Default3.con1' .i am unable to type con1.
I am getting the error "A field initializer cannot reference the nonstatic field", While My code is as below:
Object selectedItem = PageVariables.slectedItemData;
MyClass selectedItems = (MyClass)selectedItem;
But the same thing works if assign the value at the constructor or in a different method , like below:
public partial class MusicPlayer : Page
{
Object selectedItem = PageVariables.slectedItemData;
[code]...
I am just trying to understand what is the difference, Why it is looking for a static varaible declaration(in 1st case) while doesn't look for it while in a constructor or a different method
I've got an ASP.NET web app that is starting to show some very strange behavior. Here's some example code:
// in Bar.cs
public class Bar {
public static Baz baz = Something.Step2();
}
// in Global.asax
public void Application_Start(...) {
Something.Step1();
}
The short version of the story is this: On some machines, Something.Step2 is executed before Something.Step1 and is throwing an unhandleable exception. On other machines, Step1 correctly executes before Step2. Global.asax and all the objects it uses do not refer to Bar at all.
When are static fields supposed to execute in relation to other programming elements? Why would two machines (both Win7 64-bit, both with .NET 4.0, same IIS version, etc) execute things in different orders? The order is consistent on each machine too. On my machine, it always executes Step2 before Step1, but on my coworker's machine it always executes Step1 before Step2.Update I've found the root cause why my static field is being accessed. Class "Bar" from my example is actually a custom authentication module, and is referenced in web.config as the Authentication handler under System.webServer. If I remove that line from web.config, my system calls Step1 first and never calls Step2 at all. My question changes subtly to: "Why does web.config cause my static initializers to fire, and why does it cause them to fire before Application_Start executes?"
I m having a webService.
In that I m using Caching.
I have wrote following code to store datatable in cache.
using System.Web.Caching;
Cache.Insert("dt", dt, null, DateTime.Now.AddHours(1), TimeSpan.Zero, System.Web.Caching.CacheItemPriority.Default, null);
It give me error like "An object Reference is required for non static field.
I'm using jQuery and setInterval method in my asp.net web application.
I call the webservice every 5 seconds in order to check for DB changes. When i see a change, i want to change the photo of the linkButton that located on the master page, but i can to that due to static constrains.
An object reference is required for the non-static field, method, or property 'System.Web.UI.Page.Master.get'
my c# code is:
[WebMethod()]
public static bool checkDBChange(string userId) {
DBConnection dbConnection = new DBConnection();
if (dbConnection.isChanged(userId)) {
((Site1)Master).SetImageUrl = "~/Icons/a.ico";
}
return false;
}
The SetImageUrl is a setter in my master page that sets the new url to the linkButton. How I can implement it?
Aplogies if this has been discussed before but I couldn't find an answer.
I'm trying to use jquery/Ajax to access some webmethods in my codebehind. This is fine, but I would in my function like to reference a placeholder (phStory in the code below) on my page and also load a usercontrol into that placeholder.
Unfortunately I get the message: "An object reference is required for the non-static field, method, or property 'TestControls.phStory' " and similar for the usercontrol. Does anyone know how I can still access my placeholder and usercontrol from within this.
It has to be stati as it's a WebMethod but this then throws up these errors.
[code]....
I am getting a CS0120 error when trying turn a button visible after checking some variables. In plain english, If AmmohelpSession.UserActions contains AmmohelpEnums.UserAction.ArticleEdit then turn the Edit button visible. Here is my comparison:
[Code]....
In the code behind for AmmohelpSession, a public class AmmohelpSession which contains a private variable: private HashSet<UserAction> _userActions; has been stated. In that same file, there is a public function for the UserActions that does a get or set method.In the code behind for AmmohelpEnums, we are setting byte variables to specific actions. Mine would be something like:
[Code]....
Where is my error coming from ?????
I have a private static field in my Controller class in an MVC web application.
I have a static method in that controller that assigns some value to that static field, I want to apply lock on that static field until some other instance method in the controller uses the value stored in the static field and then releases it.
DETAILS:
I have a controller named BaseController having a static ClientId field as follows and two methods as follows:-
public static string ClientId = "";
static void OnClientConnected(string clientId, ref Dictionary<string, object> list)
{
list.Add("a", "b");
// I want the ClientId to be locked here, so that it can not be accessed by other requests coming to the server and wait for ClientId to be released:-
BaseController.clientId = clientId;
}
public ActionResult Handler()
{
if (something)
{
// use the static ClientId here
}
// Release the ClientId here, so it can now be used by other web requests coming to the server.
return View();
}
I have the following code in my ASP.NET project
public sealed class IoC
{
private static readonly IDependencyResolver resolver =
Service.Get("IDependencyResolver") as IDependencyResolver;
static IoC()
{
}
private IoC()
[Code]....
I have a simple web service, in it i have a static class which has a static collection to remember alive tokens.
I just want to make sure that the token collection lives until the next iisreset or the application pool recycles.
And what is the difference between remembering states in Application bag and static class?
I need an advice on piece of functionality that I am ought to implement. The scenario is that we haven an HttpHandler which servers to intercept file uploads. In the handler, I need to persist a large dictionary of strings inside the memory. The dictionary might be as large as 100 entries. I am wondering whether it is safe to store that in a static variable, so that it is not initialized every time instance of the handler is created (there will be a lot of instance for sure). In general, what is the approach in such scenarios. Is it a generally better idea to use static fields, to persist data that will not be changed?
View 5 RepliesI have a 2D array of doubles in my Default class on my Default.aspx.cs page, like so:
protected Double[,] time;
By the time the page loads, I have populated this array from a database. Now, I want to reference this array in another file (Diff.aspx.cs) to avoid visiting the database again. Also, the data is used in a read-only fashion.
I am using a GridView Control to display multiple fileds with 0's and 1's.
I am using template fields where CheckBoxes are used.
Where exactly and how do I apply the Logic to get a checked CheckBox when field Value=1 and unchecked CheckBox when field Value=2 .Also some times to be able to write a YES where fieldValue=1 or NO where filedValue=0
Do I apply this logic using asp or C#? How?
I wanna join all the field as a new col.
but how can i ignore the empty field because i always join the field and separate by space like the following.
select (field_1+' '+field_2+' '+field_3) as new_col from TABLEA
but if the field is empty, then there is the double space
how can i ensure all the space is one space only.
I have 2 fields in my gridview one called ScriptType the other BagNo, when a user click the edit button, I would like the BagNo filed to be disabled if the ScriptType field is = "TTA" and enabled otherwise. How can I do this?..something along these lines see below..I am using VB..
[code]...
I have defined a field validator that works fine on normal behavior on a page:
<asp:RequiredFieldValidator runat="server" ErrorMessage="errroooorr" ControlToValidate="TextBoxHouseNumber" Display="Dynamic"></asp:RequiredFieldValidator>
Now if I dont insert any text in the TextBoxHouseNumber field, and push submit, the FieldValidator fires as it should. But if I now click a button that automatically fills the TextBoxHouseNumber with text from a Jquery/Ajax function, the field validator still shows. It´s like "Hey, the user hasnt made any changes to the textbox, so I wont bother check it".
I have a DetailsView on the page and I have made one of the fields a TemplateField. In the EditItemTemplate and InsertItemTemplate I have a DropdownList that is databound to a table in my Sql Server database. I wanted to add an initial value to the DropdownList
namely "- select -" .
I set the AppendDataBoundItems property to true and added the initial value as a ListItem.Markup of the DropdownList
<asp:DropDownList ID="DropDownList_HP" runat="server"
AppendDataBoundItems="True" DataSourceID="SqlDataSource_HP" [code]...
This works fine for new input. The problem is however that the database already has records that were entered through a Windows Application and many of these records has a null value in this field and exceptions are thrown when I tried to open these records
and the system tried to set the SelectedValue of the DropdownList.After some more searching I found this help
http://msdn.microsoft.com/en-us/library/ms366709.aspx
So I changed the ListItem in the DropDownList markup to the following:
<asp:DropDownList ID="DropDownList_RefHospDV4" runat="server"
AppendDataBoundItems="True" DataSourceID="SqlDataSource_RefHosp" [code]...
This now solved the problem of opening a record where the value is null in the database, BUT now the RequiredFieldValidator is not validating anymore to make sure that a databound item is selected for this field and not the initial value "- select -". So basically now it is not checking anymore to see if valid input has been entered for the DropDownList and it accepts "- select -" thus it acts as if the field is not a required field anymore.
In short what is required is that I want to make sure that the user enters a valid selection in the DropDownList, but it must also cater for old records that do not have this field entered yet so that those old records can be opened in the DetailsView .Opening Old records (with null in that field):When these old records are opened in the DetailsView the DropDownlist should show "- select -" when the value in the database is null.
Saving records (old or new records):When saving the record in Insert mode or Update mode the RequiredFieldValidator should show that a valid input is not selected if the DropDownList is still on "- select -".
I have a aspx page with a ascx control inside an ascx control and the required field validator is not hit on the action of the page.
The issue is with the 2nd nested ascx control. The field validators in the first ascx control validate correctly, but with the ascx control inside the ascx control there are issues.
The nested ascx control is a repeater control and this may be the reason, but I am unsure.
I'm not exactly sure what question to ask, but I'll list a few below.
How do I attach the field validators up a level to the 1st ascx control?
Is it possible to put required fields into a nested ascx control?
I usually only write in ASP, so I am not very familiar with this script. Can anyone tell me how to how to request a querystring so I can use it to pull the image location. Like this.
PhotoCropper.aspx?userid=1090&picid=47
private const string ORIG_SAMPLE_PHOTO_URL = @"/PhotoCropperC/photos/1090/47.jpg";
I have tried just using Request.QueryString["userid"];, but I get the compiler error. Here is my code:
public partial class PhotoCropper : System.Web.UI.Page
{
//Make sure you give the IUSR_MachineName permissions to the directory below
private const string ORIG_SAMPLE_PHOTO_URL = @"/PhotoCropperC/photos/TheDog.jpg";
//private const string ORIG_SAMPLE_PHOTO_URL = "~/photos/TheDog.jpg";
private const string CROPPED_SAMPLE_PHOTO_URL = @"d:/inetpub/sites/dc/cropper/TheDogCropped.jpg";
protected void Page_Load(object sender, System.EventArgs e)
{
if (!Page.IsPostBack)
{
loadPhoto(ORIG_SAMPLE_PHOTO_URL);
}
else {
loadPhoto(CROPPED_SAMPLE_PHOTO_URL);
btnCrop.Visible = !btnCrop.Visible;
}
}
I have a question involving the ItemDataBound EventI have a linkbutton, btnOverview, that is displayed in a DataList ItemTemplate.I would like to select 1 of 2 imageurls for this button based on the value of haseOverview which is a field returned by the SelectCommend of the sqlDataSourcefor the DataList. I am not sure of how to reference this field.I have highlighted what I think is he relevant code section below.
[Code]....
[Code]....
Dim query as String = "Select * from openquery (devbook, 'SELECT wb.arrival_time FROM web_bookings wb ')"All I need is to convert my arrival_time into a datetime field in the query
View 1 Replieshow to pick a specific field (besides Primarykey field ) through HQL query ???
View 5 RepliesI have a 20 to 30 fields on a form. Most of them are optional. However, the users can fill out what they want. If a user dosen't fill in a field when data is sent to the database it's sent as blank, instead of NULL. Is there a way I can generically say "for all textboxes if Equals("") then DBNull.Value". Without going through each and every textbox?
View 2 RepliesI have a grid view, and I add new column as a hyper link field, I want the navigationURL for this field to be Pageexample.aspx?ID=other field value like this
[code]...
is that possible ?
I have a Details view containing a 2 fields. A Name and a phone number.The Name field is a template with a dropdown list that's popuplated from a database table of Names and Phone numbers. The dropdownlist shows the names. When the user selects a name I want to put the phone number into the second field in the Detailsview.
View 1 Replies