see this code:
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While in constructor i am gettine error, Aobj(0).type is not initialized, it says that Object reference not set to an instance of an object. how to initialize my objects?
I have an ASP.NET webform where I initialize an array with a list of controls on the page like this
FileUpload[4] = new FileUpload[4];
public myclass()
{
fileUpload[0] = FileUpload1;
fileUpload[0] = FileUpload2;
...etc
}
I then use these in the page load and they are all null. they are null in the constructor but why should they be null when used in the page load.
i want to store objects in a array, that is array of objects.
View 2 RepliesI currently have a function that returns a Dataset. I would to create another function to convert the DataSet to an array of objects. I have looked around and havent found anything that can help. Can someone show me a snippet or point me to the right direction.
View 4 RepliesMy brain doesn't seem to be working today. I googled around for this and just couldn't find it, which seems kind of strange since this is such a basic question that I can typically find out very quickly.
I'm trying to create an array of DateTime objects. I can't use a List.
DateTime[] dates
dates[0] = Convert.ToDateTime("12/01/2009");
dates[1] = DateTime.Now;
However, I get an error, stating use of unassigned local variable.
In the project I'm working on I have got a list List<Item> with objects that Is saved in a session. Session.Add("SessionName", List);
In the Controller I build a viewModel with the data from this session
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and in my View I loop trough the list of Items and make a form for all of them to be able to remove the item.
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When the post from the submit button is handeld the item is removed from the array and post back exactly the same viewModel (with 1 item less in the itemList).
return View("view.ascx", viewModel);
When the post is handled and the view has reloaded the value's of the html.Hidden and Html.Textbox are the value's of the removed item. The value of the html.Encode is the correct value. When i reload the page the correct values are in the fields. Both times i build the viewModel the exact same way.
Assume the JSON returned is
{"2010143545":{"info":[1,"soccer"]},
"2010143547":{"info":[0,"Basketball"]}
}
How do I use JQuery to render the array on ASP.NET page? More precisely, what kind of HTML template do I need to set to stuff the JSON with JQuey?
I'm trying to add Div Objects to an array and trying to access them later when I call my loadViews function. All of my alerts fire, in the proper order, but the array m_Divs is always of length 0.
I'm re-registering the script each time on Page_Load, due to it throwing an "Error: Object expected" after each page_load when trying to call the javascript if I don't.
.JS file.
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I have a gridview control that displays expenses claims received from clients. I have a template field that contains a checkbox - if this is ticked, a value from the gridview is added to a variable and this is outputted to a label control.
What I then want to do is to update the database according to which row has been ticked. I have so far the following code that adds each value to an array, which I was then hoping to access in the sql query i.e. Update table set value = value where id = (id's added to array)..
Code as follows - so far I'm just displaying the count of values in the array to make sure they are actually being added:
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For some reason the following JSON string creates the correct number of records in the custom objects array, but does NOT populate the objects in the array with and values.
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have some Objects, lets say Employee and Role defined as below and I have defined relationships in my database that gives me a list of objects say employees and thanks to my framework each employee object also has a Role object linked via the RoleIDID, UserName, Password, Email, RoleIDRoleID, RoleNameSo in code I can do something like this
Employee emp = dataService_GetEmployeeByID(1);
string RoleName = emp.Role.RoleName;
Now here is my problemI can bind any object in a repeater and it works fine for the first level in my relationship
For instance <%# Eval("UserName") %>
But I need to be able to show the details for my child objects as well (Role) so something like this (which does not work)
<%# Eval("Role.RoleName") %>
I know how to bind a simple objects to a dropdown list. However I am having problems binding my objects which contains sub objects to the control.i.e. with simple object i just do ddl.DataValueField = "myproperty"
with my objects they contains sub objects which i want to bind. I have tried ddl.DataValueField = "sub-object.myproperty" which doesnt work.
Iam getting an array of list from database to client side(javascript array). Now my aim to place those values in a div one by one and that div should attach to the textbox similar to Autocomplete extender.
View 4 RepliesI need to know what would be the best choice of array to use given the following specifications. This array's size will be predermined upon the loading of the appication. All I want to do is be able to add values to this array and replace preexisting array items with new values without the array changing size. Someone suggested that I use a Dictionary Array Object? I would appreciate any suggestions.
View 3 Repliesfirstly a static class only ever exists once and is not an instance. Any static members (ie static int NoOfPeople;) is stored in one place and is shared between all sessions (like the old global variables).
Now static methods is where i'm not 100% sure. If I have a static method that doesn't use any other static members could this cause inconstant results, example (this is a fairly pointless method but just a quick example of the top of my head)
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So in this example if two sessions (or threads) were to call this at the same time - would they both get back the expected results, because the method only uses private data (a, b and totalToReturn).Im sure this sounds a little simple but I will be using static methods to build user objects and various other objects that there will have to be a 100% garentee that the objects will not get mixed up between sessions and the wrong things return to the user.
i create a web part in the code behind page and i didn't nkjow how to
initializes
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I have a problem on ASP.NET webpage for data input form. My form contains a TEXTFIELD(txtDateEntry) and a Dropdownlist (ddlRegistration).
dllRegistration should be populate its data base on date in txtDateEntry. I have added an image(imgCalendar) next to extfield(txtDateEntry) and attach javascript to load a Popup Calenday. In my page load(Register.aspx) I have added the script as below:
this.imgCalendar.Attributes["onclick"] ="javascript:window.open('../CalendarPopup.aspx?textbox=txtDateEntry','cal','width=250,height=225,left=270,top=180')";
and on CalendarPopup.aspx:
protected void calDate_SelectionChanged(object sender, System.EventArgs e)
{
string strScript = "<script language='javascript'>window.opener.document.forms(0)." + control.Value + ".value = '";
strScript += calDate.SelectedDate.ToShortDateString();
strScript += "';self.close()";
strScript += "</" + "script>";
ClientScript.RegisterClientScriptBlock(this.GetType(),"anything", strScript);
}
My purpose now is that when user click on the calender and select a date, the dropdown list ddlRegistration will initial its data base on the date where calender is being selected. How could I do to reach this requirement?
In my company app they are doing the following. I do not understand that what initialize does? Do we need to Initialize assemblies before using them? and what kind of assemblies needs to be initialized?
Below is the code:
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I have a Button that creates a new product object. Then I add this button product to a list via list.add(product) and than I initialize the DataSource property of the GridView with that list via gridView.DataSource = list.
Here is the example code that will be exuted if the user clicks the add button:
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It works. But if I press the button the second time, I overwrite the previous entry from the list / grid. How can I solve this problem? They idear is, to save all created objects in the list to save the whole list later. The grid view is necessary to show the users the added objects. All components are inside an update panel.
I want to initialize text box with specific dates and after page is loaded, user can change dates and refresh the data on page.
When I set default date on pageload event, user's changes get lost as soon as page is refreshed.
txtStartDate.Text = DateTime.Now.AddMonths(-2).ToString();
txtEndDate.Text = DateTime.Now.ToString();
In past, I have used onInit event for such initialization but I am unable to find it on web form.
when i want to create a table in a form using visual web developer 2008 express how can i initialize the table with no of rows that the table contains
View 5 RepliesI'm working on a project in which we have a database, data layer (entity framework), business layer and web/UI layer.I want to use ASP.NET Dynamic Data for the web layer, but don't want it to access the data layer or database, as I want it to be purely running off business logic, and not directly accessing the data.However, it appears that Dynamic Data only allows Linq-to-SQL or entity framework data sources to be used.Has anyone used it with business-layer objects instead?
View 1 RepliesI have some code I only want to execute the first time I display a form. With this in mind I created a class variable which I initialize the first time I execute page load.
public partial class CLVideoDefinition : System.Web.UI.Page
{
string videofile;
string first;
protected void Page_Load(object sender, EventArgs e)
{
if (first != "N")
{
I then select a value from a drop down list , but when it does the auto postback it executes page load but my class varaible has been reinitialized to null and will then execute the code I only want to execute on the first run. why my class variable has been reinitialized.
Lets say I am doing a shoping cart. I authenticate the user with a session variable.For example:
If(Request.IsAuthenticated)
// Here I want to add to the shoping cart.
// Can I do the following
Session["Cart"] = "Washing Machine";
Now will this Session["Cart"] value which is washing machine here be unique to diff customers?
I want to add a class and initialize a JS funcion behind my nested masterpage which is being dervised from an other master page. But when I add the following code in the PageLoade event in the code behined of my derived page then it give the folowing error
Exception Details:
System.NullReferenceException: Object reference not set to an instance of an object.
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