.NET Tutorials, Forums, Interview Questions And Answers
Welcome :Guest
Sign In
Win Surprise Gifts!!!

Top 5 Contributors of the Month
Gaurav Pal
Post New Web Links

Use the NEW keyword to create an object instance.

Posted By:      Posted Date: September 18, 2010    Points: 0   Category :WPF
Private Sub textadd(ByVal sender as Object, ByVal e as System.Windows.Controls.TextChangedEventArgs)         txtfirstname.Text = txtdisplayname.Text 'TODO: Add event handler implementation here.     End Sub I almost wasted hours on figuring this error, I don't know how to fix this I got this error

View Complete Post

More Related Resource Links

How to create one instance of COM object that can be accessed from custom fields/workflows

Hi, Ive got a COM-object that is used to perform some actions on another server, and i can use only one instance of it ... But : 1. my custom fields must interact with it for fetching data 2. my custom workflows must interact with it for posting data So the question is : How to create only one instance of COM-object which can be fully accessible from custom fields/workflows ( custom too ) Thanks :)

VS2010 Silverlight 4 - Getting "Object reference not set to an instance of an object" when loading a

In Visual Studio 2010 I'm trying to use the Blacklight Controls (http://blacklight.codeplex.com/releases/view/37652) in my own project (and actually included the Blacklight.Controls project in my solution so that I could debug what was going on) and... after making all the XAML changes needed to incorporate the Blacklight navigation menu with my stuff in the innermost grid... everything compiled ok when doing a Build.  When I run it there's a reference to a resource dictionary in the XAML that fails with the object reference error above.  The XAML is as follows:       <UserControl.Resources>       <controls:ResourceDictionaryManager x:Key="ResourceDictionaryManager">       <controls:ResourceDictionaryManager.ResourceDictionaries>       <controls:ResourceDictionaryCollection>       <controls:ResourceDictionary Path="/Blacklight.Showcase;component/ResourceDictionaries/DavesGlossyControls.xaml">       <controls:ResourceDictionary.ResourceKeys>       <controls:ResourceKeyCollection>       <controls:ResourceKey ResourceName="GlossyBlackScrollViewer" />       </controls:ResourceKeyCollection>     &

Create COM object from ProgID in a separate domain

Hi, How should I create COM object from ProgID in a separate app. domain? After I created corresponding Type object by means of Type.GetTypeFromProgID, I cannot use neither Activator.CreateInstance nor <MySeparateAppDomain>.CreateInstance because both require assembly name as one of the arguments... but as I said before I have no RCW assembly - just a ProgID. Those Activator.CreateInstance overloads which have argument of AppDomain type do not accept argument of Type type, only argument "assembly name" (of String type). And neither of <MySeparateAppDomain>.CreateInstance overloads accept argument of Type type (all require assembly name and type name). Any ideas?!

Proxy failed to create remote object on the server

Hi, I am using .net remoting for inter-process communication between two processes on the same machine 1.   The first process is one of the Office application: Ecxel /   Word /   PP 2.   The other process is another application that interacts with one of the above. For that it needs office application object. For example: Excel The solution is comprised with 3 projects: Project #1: The remote object is a simple Called RemoteOfficeApplication – that simply wraps the required application object (Word / Excel / PP).   Project #2: The Server is a simple Office add-in, written with a Visual Studio Extensibility -> Shared project. This add-in is instantiated whenever Excel is lunched. This project reference project #1. Code: var channel = new TcpChannel (5003); ChannelServices.RegisterChannel(channel,true ); RemotingConfiguration.RegisterWellKnownServiceType( typeof (RemoteOfficeApplication.RemoteOfficeApplication ), “AppObj”, WellKnownObjectMode .Singleton);   Project #3: The Client is the process that requires the application object. This project also reference project #1. Code:   //Get Remote object proxy object remoteAppObject = Activator.GetObject(typeof(RemoteOfficeApplication.RemoteOfficeApplication), “tcp://localhost:5003/AppObj" ); //Cast the proxy var r

Can I dehydrate the Workflow object as well as the instance?

Hiya All Can I dehydrate the workflow object (i.e. not an instanciation of it) into SQLServer?  I want to save all versions created of a workflow so that I can chose to instanciate the workflow from any of the previous versions if I need to. This is due to a compliancy issue - being able to reconstruct the data created by a previous version of a workflow to prove accuracy. ThanksMichelle x

How to create an extremely large array/object (> 2 GB) without using jagged arrays ?

Hello,I had implemented a matrix scaling algorithm in Java (64-bit) for a university project and have now implemented the code in C# with .NET 3.5 64-bit. One of the operations I did in Java was creating a rectangular array with double[][] = ... (in C# this is a jagged array!) to store a symmetric matrix which is used as input for the algorithm. Since I was using matrices with n up to 30720, memory usage for the single matrix object was around 8 GB in it's maximum and with matrix multiplication around 20 GB.So... now I implemented this in C# and I am shocked to see that double[,] (rectangular arrays) can only be 2 GB in size even on 64-bit! That means that for matrices with n larger than ~15000 I will get OutOfMemory Exceptions although there is a huge amount of free memory (I have two quad core systems with 12 GB and 24 GB Ram). When I use jagged arrays in C# (i.e. double[][]) I can create larger matrices. That is because I have one small array with the size of the row number (i.e. n) and then for each row an array of size n, but they are all single objects so I don't reach the 2 GB per object limit. The problem with jagged arrays is that they are horribly slow for matrice calculations compared to rectangular arrays and even slower compared to single dimension arrays.Actually I intended to rewrite my code and simulate the matrices in single arrays (see sample code below) bec

reference not set to an instance of an object.

Hi friends,I got this error. This application for  delete  multiple record in gridview using Check Box.Please verify it. I tried before one application, that one finally worked,That application also error occurred, but after some time it execute(automatic I didnt do anything) correctly,Please tell me why this type of error occurred.  Object reference not set to an instance of an object. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.Source Error: Line 153: if (chkdelete != null) Line 154: { Line 155: chkall.Checked = array.Contains(grideviewsasmple.DataKeys[i].Value); Line 156: Line 157: if (!chkdelete.Checked) Source File: c:\Inetpub\wwwroot\AdditionUpdate\Default.aspx.cs    Line: 155

Create a meeting instance with an event handler

Hi, i want to know if its posible to insert a new meeting instance in a meeting workspace automatically when you add a new event in a calendar.   i try to pass automatically the option of the template selection.   its posible with the objetc model or web services?   thanks

Object Reference not set to an instance of an object

Hi All,While using listview to upload images I get the error message. "Object Reference not set to an instance of an object".Gallery.aspx is suppose to call ManagePhotoAlbum.aspxError generatedLine 5: Protected Sub LinqDataSource1_Inserted(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.LinqDataSourceStatusEventArgs) Handles LinqDataSource1.Inserted Line 6: Dim myPhotoAlbum As PhotoAlbum = CType(e.Result, PhotoAlbum) Line 7: Response.Redirect(String.Format("ManagePhotoAlbum.aspx?PhotoAlbumId={0}", _ Line 8: myPhotoAlbum.Id.ToString())) Line 9: End SubCode Behind Gallery.aspx.vbPartial Class Photo_Gallery    Inherits System.Web.UI.Page    Protected Sub LinqDataSource1_Inserted(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.LinqDataSourceStatusEventArgs) Handles LinqDataSource1.Inserted        Dim myPhotoAlbum As PhotoAlbum = CType(e.Result, PhotoAlbum)        Response.Redirect(String.Format("ManagePhotoAlbum.aspx?PhotoAlbumId={0}", _            myPhotoAlbum.Id.ToString()))    End Sub    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load    End S

How to create Object in Object Test Bench

Hi,I used Object Test Bench to test my classes in VS 2008 professional edition . Right click on Class name and then selected create instance ,then its Constructor, there comes a dialog box, that just gives a message and a TextBox field is present there, i filled that field with any name and clicked OK.Then error message comes that "Create Instance Failed" and its error code is "0x80004005" . What's this ? How to instantiate object of my classes ?

Create new database as a user instance

Hello...Is there any way to create a new database directly as a user instance. I guess this means creating a new mdf/ldf pair which is detached from the server after its created.Thank you...

Object reference not set to an instance of an object.

This one has been killing me for 2 days now, and it should be so simple.I have a button on a page with an onClick that calls a web service.  I get the above error (on Line 938, Sys.WebForms.PageRequestManagerServerErrorException) as soon as the button is clicked.  The error seems to occur the second that the service is called - I have verified that every step of  the client-side code works and does not contain null values.  When remote debugging, the exception hits as soon as it jumps over to the web service's source code, an indication that the reference to the server itself is also valid.The code: (bad spelling and formatting not mine... I inherited this and have been cleaning it up as I go)'btnClick event - removed the log-writing lines for clarity's sake Private Sub btnSendCIS_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnSendCIS.Click Dim dt As DataTable Dim retr As String = "" dt = createOrderTable() Dim client As New ProdEndpoints.CISPRODUCTIONClient() retr = client.CompleteOrders(dt) client.Close() tmRecive.Interval = tickinterval getallrecive() End Sub 'createOrderTable - creates the dt that is sent to the service, also with log-writing lines removed. verified this is not returned Null as the log-writing includes pulling ou

How to Create SiteCollection through SharePoint Object Model?

hi all, i want to create site collection through programmatically. i used below code but iam getting error as "object reference not set to instance of an object"   SPSite site = new SPSite("http://servername:7833/");   SPWebApplication oweb = site.WebApplication;   SPSiteCollection sitecol = oweb.Sites; sitecol.Add( "sites/sitename", "sitename", "welcome to site collection", 1033, "STS#0", "Domian\\user", "User Display name", "user mailID"); oweb.Update();   iam getting an error at sitecol.add line the error is "Object reference not set to an instance of an object". please suggest me in order to remove the error. please suggest me if is there any other way to create site collection through programmatically. thanks in advance..

Null Reference Exception was not handled by user Object Reference not set to instance of an object

using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;using System.Security.Principal;using System.Data;using System.Data.SqlClient;using System.Windows;using System.Collections; public partial class Default2 : System.Web.UI.Page{    protected void Page_Load(object sender, EventArgs e)    {     }    private bool tableCopied = false;    private DataTable originalDataTable;     protected void GridView2_RowDataBound(object sender, GridViewRowEventArgs e)    {         if (e.Row.RowType == DataControlRowType.DataRow)        {            //string sValue = e.Row.Cells[3].Text;             if (!tableCopied)            {                originalDataTable = ((System.Data.DataRowView)e.Row.DataItem).Row.Table.Copy();                ViewState["originalDataTable"] = originalDataTable;      &nbs

Object reference not set to an instance of an object.

can anybody help me with this error??the error occurs in the first line of the if statement...i really dont know how to fix this problem.. please help..Dim GW1 As new GridView            GW1 = CType(Me.LoginView1.FindControl("GridView1"), GridView)            If GW1.PageCount < 1 Then                lblFromDept.Visible = True                ddlFromDept.Visible = True                SelectedFromDept.Visible = False                btnOK.Visible = True            Else                lblFromDept.Visible = False                ddlFromDept.Visible = False                SelectedFromDept.Visible = False                btn

Object reference not set to an instance of an object.

When  can debugg the code it will give the error "Object reference not set to an instance of an object.". The code is--     using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; using SMC.AlphaAccounting.EntryControls; using SMC.AlphaAccounting.PlugIns; using SMC.PlugInContracts; using SMC.BusinessObjects; using SMC.Utils; using SMC; using SMC.AlphaAccounting; using SMC.AlphaAccounting.DataEntry; using Infragistics.Win.UltraWinEditors; using Infragistics.Win.UltraWinMaskedEdit; using Infragistics.Win.UltraWinToolbars; namespace WindowsApplication3 {     public partial class FormCountry : SmcDataEntry     {         private boGlChart boLocalGlChart;         private boVendors boLocalVendors;         public FormCountry()         {             InitializeComponent();             this.ultraNumericUniqueID.KeyDown += new KeyEventHandler(ultraNumericUniqueID_KeyDown);             this.ultraNumericUniqueID.KeyPress &
ASP.NetWindows Application  .NET Framework  C#  VB.Net  ADO.Net  
Sql Server  SharePoint  Silverlight  Others  All   

Hall of Fame    Twitter   Terms of Service    Privacy Policy    Contact Us    Archives   Tell A Friend