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I'm jumping into Python/Django, and have been hitting some speed bumps. I'm a somewhat novice programmer. I know the basics, but haven't done anything more than create a PHP webform, and build very simple websites. I have a thousand questions about Django (most centering around Views and customizing the Admin, … |
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Okay so I have a class `Student`, which takes a number and a vector as a parameter for the constructor. Everything works well, until I output the values of the vector for every instance. The problem is that the same vector is being shared with EVERY instance I create, but … |
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Hello everyone, In my wpf application i have user conrtols like button,rectangle,image etc.. in one side of the window(whole window is divided into 2 canvas panels) i need to implement the functionality where, if i drag any user control and drop it in other area of the window, a new … |
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Hello everyone, I am working on a VB project which implements a number of custom controls. So far I have had no issue with the controls I have been writing; until now. Every time I add the control to the form it appears like a normal control, however when I … |
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I get error #91 at line 114 (Object reference not set to an instance of an object). What do I need to do to correct that. (I get the error either pre-declaring X or as it is now) Thanks Dim iterAAA As Single = 1 54: 55: Dim arraydciP(3) As … |
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So basically im creating this python adventure text game. And so far its good. But i have this problem with class instances(Is that the right term?) Say for example i have this class, class monster(object): def __init__(self,health,attack): self.damage = damage self.health = health So then I create a class object(again, … |
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Hi, Can anyone tell me how to create a class in C++ such that, the instance of that class cannot be created on stack? Am not able to figure out how to do it. Thank-you in advance, Sri |
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I have a warning that I can;t get rid of: Access of shared member, constant member, enum member or nested type through an instance; qualifying expression will not be evaluated. I am pretty sure it is becasue I have not dimentioned the variable but how do you dimention an IO.memorystream. … |
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Good morning Guys, I've got this code currently running: private void button1_Click(object sender, EventArgs e) { SqlDataSourceEnumerator sdse = SqlDataSourceEnumerator.Instance; DataTable table = sdse.GetDataSources(); foreach (DataRow row in table.Rows) { instanceCombobox.Items.Add(row["ServerName"].ToString() + "\\" + row["InstanceName"].ToString()); } Which gives me the Instance and Name of the SQL Server over the Network. … |
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i have a problem when updating database. i need to update stock value in other table and count it and update to another table again. here the code : 'in every row on 'SalesDetailBindingSource' For Each SalesDetailData In SalesDetailBindingSource MsgBox("SalesDetailData : " & SalesDetailBindingSource.Count) 'dim use to take parameter Dim … |
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Hi i m trying to connect with .mdf database file from vs2005. it gives error failed to create user instance .....i hv installed visual studio managemant express2005 |
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Thanks for the support! I have been working on a program with 7 classes, one the main and one starts the program, and I have been troubleshooting for a few hours trying to see why for one of the output constructors I'm not getting the classes to update the output. … |
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Is there any method to deal with distributed deadlock when multiple instances are available for each resource type? I think method of wait-for graph and chase algorithm can be used only when single instance of each resource type is available. |
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Private Sub DataGridView1_CellContentClick(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles DataGridView1.CellContentClick frmDisplayLockerInfo.Show() frmDisplayLockerInfo.TextBox2.ReadOnly = False frmDisplayLockerInfo.TextBox3.ReadOnly = False frmDisplayLockerInfo.TextBox4.ReadOnly = False frmDisplayLockerInfo.TextBox5.ReadOnly = False frmDisplayLockerInfo.TextBox6.ReadOnly = False frmDisplayLockerInfo.TextBox7.ReadOnly = False frmDisplayLockerInfo.TextBox8.ReadOnly = False frmDisplayLockerInfo.TextBox9.ReadOnly = False frmDisplayLockerInfo.TextBox10.ReadOnly = False frmDisplayLockerInfo.TextBox11.ReadOnly = False frmDisplayLockerInfo.TextBox12.ReadOnly = False frmDisplayLockerInfo.TextBox13.ReadOnly = False frmDisplayLockerInfo.TextBox15.ReadOnly … |
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Hi Guys I am trying to create a global object instance and am currently running into a segmentation fault while accessing a member variable. I have a capture.h file and a capture.cpp file //In capture.h struct ringinfo { // a simple struct }; class capture_manager{public: func1(); func2(); ringinfo ringinf ; … |
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Hi all, I got the error in design window "Object reference not set to an instance of an object." Instances of this error occurs at two cs files one.cs value = UIHelperConfig.GetSelectedPaymentTypeCode("CreditCard"); two.cs public static string GetSelectedPaymentTypeCode(string paymentType) { return ConfigurationManager.AppSettings.GetValues(paymentType)[0]; } How to make my design window viewable?? Any … |
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Does anyone know how to resolve this other than a complete reboot? I'm restarting both my work desktop and personal laptop on an almost daily basis, which is irritating, to put it politely: **Couldn't register com.your.App with the bootstrap server. Error: unknown error code. This generally means that another instance … |
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Hey all, I have been busy building my own chess game and as of now im a bit stomped. Well you see i have an object Board, this object will be initiated and it will create a new frame with various panels one of them being the panel which holds … |
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Hi Ive got an error message saying "Object reference not set to an instance of an object." It doesnt make sense to me and the troublshooting tips says to make a new keyword, but since Im new to C# I dont fully understand it. Heres the bit of code thats … |
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Is there a way to call a visiblox chart that created with c# code in wpf? Let's say that i have created a chart like : [CODE]private Chart CreateNewChart(int num_chart, string chartName) { Chart newChart = new Chart(); newChart.Name = "Chart_"+num_chart; newChart.Title = chartName; newChart.Width = 600; newChart.Height = 120; … |
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I am trying to create a walker that goes through directories. Here are the inputs and outputs which I have partly working. I am using a test directory but I would like this to be done on any directory which is leading to some problems. [CODE][IN]: print testdir #name of … |
Hi all, How to find the base address of a structure ,just by knowing the name of the structure and a address of one of its members. Thanks in advance |
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I have three classes. I have a main app, a Draggable class, and a creator class. I want it so that when i click on one rectangle it produces the same exact dimensions as the shape i pressed. However, the problem is that when I use mousePressed, it seems that … |
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Hi all, Wonder if someone could please lend a hand, I have a courses.txt file which is read into a Course String array I also have a program.txt (A list of 8 courses required to pass the program) There's a menu option to change the Program, however a condition of … |
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Hey dear Friends... I'm developing a code for an assignment given that find a solution for a modified Dining philosophers problem.. For that problem I had to create four classes. [ICODE]Philosopher[/ICODE] , [ICODE]chopStick[/ICODE] , [ICODE]samllBowl [/ICODE] and [ICODE]bigBowl[/ICODE].. I implemented the class [ICODE]philosopher[/ICODE] as Runnable.. And the problem is this.. … |
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Can someone help...this used to be so easy in C++ and VB6 :) I am dynamically creating multiple instances of a fairly simple class, tracking them via the Collections class in vb.net. I loop through the collection if I need to get to a particular instance to set some property, … |
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When I declare a class or an instance of the class, I get the error, error: redefinition of 'class player' then after, I get, error: previous definition of 'class player' by the way, I am using gc++. If you want to see the source, just ask. thanx, JT |
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I have created a UserControl Popup window and called that xaml file into another file. Imported the namespace. When I am trying to build this project an error at this below given code: [code=xaml] <Popup x:Name="POP" IsOpen="False" PlacementTarget="{Binding}" Placement="Center" AllowsTransparency="True"> <a:PopUpWindow x:Name="pp" /> </Popup> [/code] Error at [code=xaml] <a:PopUpWindow x:Name="pp" … |
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Hi! I want to run multiple threads at the same time, and each thread has foreach loop accessing a listbox, so each thread checks every item in listbox, instead that each thread checks only one item, or skip an item if it has already been checked by other thread. Now, … |
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I was reading an SCJP book by Khalid Mughal and I came across a statement [QUOTE]Enum constants are static members[/QUOTE] and another [QUOTE]Enum constant is an instance of its enum type[/QUOTE]. I am unable to reconcile the 2 statements. Are the constants static members or are they instances ? (Instances … |
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