backgroundworker

问题 I am using following code to handle all the unhandled exceptions in the program. But the problem that the exception is not propagated to the specified methods. [STAThread] static void Main() { AppDomain currentDomain = default(AppDomain); currentDomain = AppDomain.CurrentDomain; Application.SetUnhandledExceptionMode(UnhandledExceptionMode.CatchException); // Handler for unhandled exceptions. currentDomain.UnhandledException += GlobalUnhandledExceptionHandler; // Handler for exceptions in

问题 I have problem with code below. Can some one tell why it doesn't work in BackgroundWorker and how can i solve this problem string address = "My URL"; webBrowser.Navigate(new Uri(address)); do { Application.DoEvents(); } while (webBrowser.ReadyState != WebBrowserReadyState.Complete); 回答1: No!! You better open a new thread and instruct the WebBrowser from there Application.DoEvents() is kinda evil. Here is how you can start System.Threading.Thread t = new System.Threading.Thread(() => {

问题 Im running a c# code with background worker. Im impelmenting it by having a foreach loop and inside the loop im passing the foreach variable as parameter for the Backgroundworker. But the problem is that whenever i run the code only single random value, most probably the last row in the gridview is passed as parameter. The code is as here foreach (DataGridViewRow row in dataGridView3.Rows) { BackgroundWorker worker = new BackgroundWorker(); worker.WorkerSupportsCancellation = true; worker

问题 I have a time consuming task that tests a couple of network connections. In my example below I have confined it to one connection. Normally the connection returns quickly but it could happen that the connection cannot be made so that the socket times out. During this time I would like to display an "idler" gif in the Form, when the connection succeeds the app should change the Image in the Form to some green check icon or in case of a failing connection a red icon "stopper" should be

问题 Hello I am trying to implement a solution for updating form controls without using a delegate. I am attempting to use the 1st solution on this page: http://www.dreamincode.net/forums/blog/143/entry-2337-handling-the-dreaded-cross-thread-exception/ Imports System.ComponentModel Imports System.Runtime.CompilerServices Public Module MyInvoke <Extension()> _ Public Sub CustomInvoke(Of T As ISynchronizeInvoke)(ByVal control As T, ByVal toPerform As Action(Of T)) If control.InvokeRequired Then

问题 I am writing (and teaching myself how to write) an experimental assembly in VB.NET 3.5 that is exposed via COM and then called from some Excel VBA code to initiate an instance of a class that traps some Excel events and then perform some functions on the active workbook in Excel. To initiate the class, a reference to the Excel Application is passed from the VBA (I am using a PIA for Excel in the assembly). I needed to perform a time-consuming operation on the active workbook from my assembly

问题 Currently I am working on a project which need to consume large amount data from web services, There is service class sending input date to the server and get back the result, due to it time consuming process, it is required to user combined progressbar and backgroundworker to show user the process percentage. I have browsing quite a few sample code on this topic, but still could not figure out the best way to do it. Would you please help, My code is following, private MyCollection[]

问题 I'm writing an app that parses a very large logfile, so that the user can see the contents in a treeview format. I've used a BackGroundWorker to read the file, and as it parses each message, I use a BeginInvoke to get the GUI thread to add a node to my treeview. Unfortunately, there's two issues: The treeview is unresponsive to clicks or scrolls while the file is being parsed. I would like users to be able to examine (ie expand) nodes while the file is parsing, so that they don't have to wait

问题 I couldn't find a solution for this yet...hope someone can help me. I have a backgroundworker that runs until it is cancelled by the user (it reads data from a socket and writes it into a file). Now I want to split the output file after a certain period of time, e.g. every 2 mins create a new file. For this to happen I'd like to use a timer, something like private void bckWrkSocket_DoWork(object sender, DoWorkEventArgs e) { //create timer and set its interval to e.Argument //start timer while

问题 I have the following in a button click event: private void buttonSubmitAchChecks_Click(object sender, EventArgs e) { if (backgroundWorker1.IsBusy) return; SubmittingAch(true); backgroundWorker1.WorkerReportsProgress = true; backgroundWorker1.WorkerSupportsCancellation = true; label_Status.Text = "Submitting checks to ACH ...."; var qry = from ds in checkTrans.IndividualCheck where ds.SubmitToACH && ds.Status == "Entered" && ds.CheckAmount > 0 && ds.SubmitToACH select ds; if (qry.Count() <= 0)