.NET Button Is A Object Or Class?
Apr 20, 2010 clarify me this interview Question.
Button is Class or Object?
clarify me this interview Question.
Button is Class or Object?
I've scenario where I want to insert data into database without post back. there are around 12 to 13 fields which i need to insert. I'm passing DTO from the client side which is actually Json object. Now the problem which i'm facing is how to convert that Json object which i got in webservice to the "class" (in my case class name is User) object.
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In the above case AddNewUser method takes the object of User class. But i'm getting casting error. So how do I convert Json object to the "User" class object?
I have an existing class for an input, is it possible to add an additional class for the object in C#.net, instead of doing a if/else and not having a preset class on the object in the first place?
View 3 RepliesActually i want to cast the type from find control to div but i cant find the class with div or body or form name why so?
View 5 RepliesI have a WindowsForm that has a DataGridView that shows output of my app. The class with the button is DriveRecursion_Results.cs. I want it so that once the button is pushed by the user, my method FileCleanUp() in my SanitizeFileNames class is called. I'm not quite sure how to do this though.Here is the code for both classes:
public partial class DriveRecursion_Results : Form
public DriveRecursion_Results()
InitializeComponent();
private void listView1_SelectedIndexChanged(object sender, EventArgs e)
[code]...
I keep getting this error Object reference not set to an instance of an object. What i want to do is when the button is clicked my panel is visible with a textbox of the id number, of the row that they clicked. by id number i mean the column id, and the number given to it by the database.
Protected Sub GridView1_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs)
Dim button As Button = CType(e.Row.FindControl("button1"), Button)
Dim id As Label = CType(e.Row.FindControl("id"), Label)
button.OnClientClick = _
Panel1.Visible = True
Label2.Visible = True
Label2.Text = id.Text
UpdatePanel1.Update()
End Sub
When I get an Object Ref error, it can sometimes be a real pain to find out which variable is causing the error (when you can't debug). Is there a way for this error to throw the classname that isn't assigned?
View 2 Repliesi have 10 classes and i want to send the class in a paramenter dynamically to call a method for example int addmember(aslogic.base obj) smilary i want to pass class in the parameter.
View 4 RepliesMy problem today is that I am having trouble shifting some functionality, that is being used in multiple applications, from the applications themselves to a class library I have started building. The issue comes in the fact the code was written to utilize Response objects as seen below...
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This is all currently within a function called "DownloadDocument". I continue to have issues running any of the Response object functionality. I usually get the error saying, "Response is not available in this context", is there anyway to use a Response object in a class library file?
We all know that, we cannot create the object of Abstract class.
But why it is so?
I mean, can anyone explain it with real time example?
how to create object of HttpResponse class
HttpResponse response=new
HttpResponse (TextWriter
tx);
how to inplement this wrong code to right one & how to implement TextWriter.
I have a class TicketOrder. It's not recognizing my lstSectionNumber (Tickets.TicketForm.lastSectionNumber is inaccessible due to its protection level).
Here is the code for TicketOrder class:
public class TicketOrder
{
public TicketOrder(TicketForm form)
{
this.form = form;
}
//Declare static variables
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This is my code behind:
public partial class TicketForm : System.Web.UI.Page
{
//Declare variables
int myInt;
TicketUser user = new TicketUser();
TicketOrder order;
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Why do we use the reference of abstract class (or base class) to create object of it's sub-class. eg: TextWriter is the abstract class for StreamWriter & StreamWriter.
TextWriter writer = new StreamWriter();
why can't we simply use :
StreamWriter writer = new StreamWriter();
I wanted to know what is the use of System. Environment class and what is an object pool in .Net?
View 2 Replies I create a database with more than 10 tables, how can I automatically generate business object class inside asp.net C# project?
I hope that one expert can give me steps for how to do that?
I am interested to know what happens with unused properties of a class when an object is instantiated?
Are there performance hits for having additional unused properties? What about complex properties that are accessing the database, but I'm not using them, are they still being loaded?
I have a user control with a number of methods. I also have a dataset object that I'm filling in one method, but I also need to access that same dataset (and the data in it) in another.
I am filling the dataset from some xml that I get from a webservice when someone clicks on a button. The data from the dataset is then bound to a listbox control. When someone selects an item in the list control (I have autopostback set to true on it) it then fires off another method and it's this method where I need to access the data in the dataset, but when I check the immediate window it's telling me that the dataset is set to null.
Where am I going wrong?
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When I create a report in my Visual Studio 2010 (SP1 Beta) Web Site and select New->DataSet ... from the Report Data window, the DataSource Configuration Wizard goes directly to 'Choose You Data Connection'.
In the desktop world the wizard first presents the 'Choose Your Data Source Type' wizard screen where I can select 'Object' as the type. In my case it skips this screen and goes directly to the 'Choose You Data Connection' wizard screen as if I had clicked 'DataBase' as my type. Note that I do have 'LINQ to SQL Classes' in my project.
I have reviewed the following link but it does not seem to in my case and I am using dbml rather than xsd:
[URL]
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?
I have a class object which is basically kind of hierarchy and looks like this when I convert that to XML.
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So you can see that I have "objectComponent" which is kind of hierarchy and that hierarchy can be upto any level.
Now I need to update <quantity> value where <sku> = "SKU 2", remember this <sku> can be anywhere in hierarchy, so I need to update its <quantity> value where <sku> = "SKU 2".
So my question is how can I update that value using Linq query and specifically, I need that value to be updated in the actual object itself because I need to pass that updated object for furthur process.
In my c# code, there is only one class named "ObjectComponent" and that has all of these properties and "objectBundle" as array and the whole hierarchy starts from there.
how can I update value in this object directly?
I have customer table with column firstname and lastname. How can i write a class that allow me to read and write value back to table?
View 4 Repliesstore our DAO objects in the Application object, so there's one object of each available for the whole application.
This Application object is easily accessed in the Page codebehind itself, but how do we access it from a plain class that is not extending anything?
I hate to see the name of the class used as a string parameter like "FileDownloader" in the code, and I would like to use something like this FileDownloader.Name(), where FileDownloader is name of the class.
Only problem is that I can't find out how to do that without instantiating object or creating a static method...
Is there a way to get a class name in .net without having the object instance and without creating a static method that returns the name of the class?
I wish to persist a class object across postbacks by using a single session variable/object/whatever.
The class has about a dozen single variable properties; and about a dozen table properties; and several methods. The main table tracks rows of sporting event results. The web site will collect one row at a time for each postback. The data in the object's constructor is based on a dataset, but the data in the class will grow each time I do a postback so I don't want to loose the information in the class. The data isn't very big - it will fill a single computer screen.
Being new to programming I am thinking that I can store the dataset in the session but that would slow down the response time because I the methods would have to be called to refine the data - or maybe I can just store the entire class object in a session.
I want to change the class of an object dynamically in C#
Main Class : handleOperator objOpr = new handleOperator();
Then for object objOpr I need to access the methods for another class Class2 :
Means, I want objOpr = new Class2();