I have a UI control that gets updated from two different threads using the standard delegate/Invoke thing. The problem is that the calls that go through the invoke are happening way after the calls from the main thread. I need them to update the UI in the order they where called.
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I got this form with 2 textboxes and 2 buttons, when clicking each button, the corresponding textbox should show 1, problem is none of these textboxes show anything
here's the code in form1
Imports System.Threading
Public Class Form1
Dim mc As New mycl
[Code]....
I'm fairly new to ASP.NET and of course happened to stumble some strange problem. problem is very popular, but none of the replies I found worked for me.
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And the image doesn't change. It doesn't even fire up the showphoto.aspx code.The property is changed (because next time i step into it, it's changed), but showphoto is never fired.I'm aware of image caching issues, but I can't get even one image, not mentioning have it changed.For sure there's a very simple explanation, but I'm fighting with this for 2 days now to no avail.
overwrited class property not updated in the control.I have the following custom dgv:
Public Sub New()
MyBase.New()
Me.AllowUserToAddRows = False
Me.AllowUserToDeleteRows = False
Me.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle
Me.EnableHeadersVisualStyles = False
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part of my code is in below
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I would expect to see the path.Path include the new record, however, I also notice that tempnextgen also include the new record. Can anyone help me out on this issue? Why the tempnextgen got updated as well, how to prevent this unexpected operation?
I have a DataTable that's constantly being updated with new data from my database via a timer. That data is eventually reformatted and displayed in a DataGridView control.In an effort to prevent the DataGridView from completely refreshing from re-databinding (thus, clearing out selections, resetting scrollbars, defaulting sorting settings, and making the gridview flash as it reupdates), I'm simply removing old rows from the datagrid that no longer exist in the DataTable, and adding new rows to the datagrid that appear in the DataTable since the last update.
For the sake of simplicity, we'll call DataGridView the LEFT table, and DataTable the RIGHT table I'm looking for a way to go through both tables (LEFT and RIGHT), and remove old rows that are no longer in RIGHT and delete them from LEFT. And look for new items in RIGHT and add them to LEFT. Each table has a column called "RecID" containing a unique id for each entry that can be used for comparison. is there a way to do this all in one loop? What I'm looking for, in pseudo code:
<loop through everything>
if RecID does not exist in LEFT but exists in RIGHT
add new item to LEFT
if RecID does exist in LEFT but does not exist in RIGHT
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I just had a new, last-minute idea on to take on a task, so I am running to StackExchange for quick help.
What I want to do is execute a series of methods right in a row, each in their own threads. I want the application to wait until all of these threads are completed, after which the program will resume. It also has to use managed threading (thread pool).
What quick examples could you provide to help me along the way? If it's too complex, what things should I know about so that I can Google it on my own?
I have a main thread which is designed to be a batch processor - it spawns a series of 'child' threads from a loop (which can vary in terms of the no of items) - see below
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However, each of the 'child' threads could take anywhere from milliseconds to about a minute to process - depending on the complexity of each calculation. There may also be a large number of child threads - e.g 100s. Creating large numbers of child threads is not efficient. I therefore want some way to effectively queue each child thread (and cancel if the process is taking too long to complete). Autoevents seems like one way of doing this, but the only examples I can find seem to assume there are two different processes on seperate threads, not one process being repeated.
I load a DataGridView (VB.Net, VS2005) using the code below. The save logic works fine for manual edits oh the cells.However, I run some code that updates a Status column in every row then I call the same Save logic. All rows execpt the first row are updated! I am updating the Datasource (dvCerts)Ah.... I just tried changing the CurrentCell to 1,0 instead of 0,0 and now the data saves OK.
Load_...
daCerts.SelectCommand = New SqlCommand("SELECT * FROM PERP_ARB_Certificates", conPERP)
Dim cmdBldr As New SqlCommandBuilder(daCerts) ' used for grid save
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as os are being updated does windows updates the api also ?is yes what are the new windows api provided by microsoft and their documentation for windows 7
View 6 RepliesI have a picturebox that is supposed to grab an image from the clipboard, which contains the latest image captured from a webcam. Portion of the codes are as follows:[code]...
View 8 Replies[Code]...
The table is not getting updated.
I'm trying to write my first application which connects to an Access db. It took me hours to understand this, but I figured out that, if during the creation of the connection I chose to copy the mdb file in my project directory (VB asks this), I get that the database is not updated. Everything works, except the save button which saves new rows in the db. If I answer no, and the original mdb file is used, the database is correctly updated as expected. Is there a reason for this? Why is this happening? Shouldn't the database bu updated anyway?
View 2 Repliesi'm having a gridview which is binded to a dataview, OnPageLoad i'm populating gridview records. and i have a textbox and a button, So now i want to add more Records to GridView but this records should not be get added into DB, they just added to the page and of course the default records which are coming from db stay.
<asp:GridView id="gvItems" runat="server">
<Columns>
<asp:TemplateField HeaderText="Item Code" SortExpression="ItemCode">[code]....
Basically at first Data From DB comes to page then after that Textbox data should get appended to the Gridview but Db should not get updated. i tried to do it by keeping DataView in ViewState or Session variable but later i came to know am going in a wrong way and that this won't work since Dataview can't be Serialized. i just need an idea or right path to do this, is this possible what am doing? [my alternative option ]: create a temp db table and save it... but i don't want to use this option..
i implemented a RSS for big company on loacal area network attached with sql database to feed internal news.everything working fine.but i faced a small problem when the database changed the RSS doesn't take the update unless the user close the RSS and start it again.how can autorefresh the rss without closing it when the database changed.
View 1 RepliesIn my inventory mobile application , i use RDA.using the mobile device ,i update only the Barcode of a particular Item which is in the Item Master(.sdf file). then I push the tables to the SQL Server.there is a web application handles all the other functionality , including Item Master Changes.for and eg.
(1) I pull the Item master to the Mobile Device.
(2)change the Item Name from the Web application.(NOT FROM DEVICE)
(3)Update Bar code from the Device
(4)push table from mobile Device to SQL Server.
In this situation Old Item Name is replaced.My need is only to update the Barcode.
Using this code i cannot insert data in the database . it gives no error but no row is created in the data base
Imports System.Data.SqlClient Publi ClassForm1 SqlConnection("Data Source=.SQLEXPRESS;AttachDbFilename=
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Ive never done a database before and i found this in one of my books... I think it should work. The part of the program that is in bold is the issue i get an error that says "Update unable to find TableMapping['Table'] or DataTable 'Table'." From the da.Update(ds).. ive been trying to figure this out for hours!
Public Class retailForm
Dim tempPrice As Double
Dim dbProvider As String
[code].....
I am using a table adapter and the update code as below in a Try/Catch block as shown on the MSDN site.
Me.MyTableAdapter.Update(Me.MyDataSet.MyTable)
This all works fine but I should like to return to the user a MsgBox which displays the count of new records added and/or existing records amended.I know I could count the records in the underlying table before and after the update, the difference being the count of new records. How can I count amended existing records ?
I am using the project management database created by Microsoft to track our projects. I would like it to notify (send an email) out to people once they are added to a project. And then send another one out when their due date is a couple days out as a reminder. Can someone help me with this. I am not a guru at programming and am just starting to get in to it. I would love to get this task done and then I think this database is complete. ( I am guessing I need to use the DoCmd.SendObject, but from there I am lost and what needs to go before it.)
View 2 RepliesDoes anyone know if Visual Studio 2010 has a good/Updated Tapi sdk? Or Does any one know where I can get a Tapi Sdk that is in .Net format?
View 1 RepliesUsing VB in Visual Studio 2005, I buit a lttle bit of code to create/manipulate an Excel spread sheet. At time of creation no problem no errors or warnings. Program ran fine. That was a couple weeks ago, I open the project now and I get a warning :"Warnin There are updated custom wrappers available for the following referenced components: Excel ,VBIDEI haven't changed anything. One other thread to this said remove references to Excel and readd, I tried that, no luck. I have had same warning with other VB programs using COM and cannot firgure out how to update custom wrappersRDE
View 1 RepliesI have an array of objects, I find the item by index, assign a value but then looking at the array the item doesn't show the updated value.
Public Structure Cheque
Public Id As String
Public Status As Byte
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How can i retrieve last updated EmpID form sql database.
View 1 RepliesI have some text boxes in my form that takes data and saves the data to the database. There is a combo box on the form that loads data from a specific field of a database.
When I enter and save the new data (using the textboxes), the combobox doesn't show the newly entered data. I tried to refresh the combobox using code like combobox.refresh, me.refresh etc....to refresh the form but nothing is working.
The combobox only display the new data when I close the form and reload the form again. Anyway, the data loading in the combobox is done using datasource, displaymember, valuemember in the properties So, how can I make the combobox show the updated record (field)?
the combobox name is cboManager
the Displaymember: Mname
Here's the code
Private Sub frmAdmin_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'TODO: This line of code loads data into the 'UserDataSet.Manager' table. You can move, or remove it, as needed.
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I am trying to update a table using LinQ. Though records are getting inserted, for some reason they are not getting updated.what can be possible problem
Dim db as new empDataContext
Dim emptable as new employee
if update then[code].....
KB Article Q180366 has a good (and really simple) solution on how to detect when a web page is done loading. However, it is horribly out of date (applies to IE 4.0). Has Microsoft produced an updated version to this solution that works with more recent version of IE like IE 8? Here is the older link: [URL] Seems like everyone has a solution that works sometimes but not one that works all the time.
View 11 RepliesFinding the right way to code my program. I want to have the Now.DayOfWeek updated every 60 sec, as it only update on startup. I have been trying many diffident solutions but just can seem to find one which works.
Public Sub New()
'Opbygning af menuen
mnuDisplayForm = New ToolStripMenuItem("Vis bnings tider")
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Whenever I change a user setting in app.config (via running the program) the change doesn't appear in the app.config file (it stays the same). When re-running the program, however, the change is reflected in the program's behaviour. How can this happen if app.config wasn't altered when the program was last run?
View 2 RepliesHaving trouble with properties in a Class, demonstrated by the code below.If create a class (person) that has another class (address) as a property and set the elements of the address, the set method on the first class never gets called.It also allows the property to be updated although the set method prevents this.
Module Module1
Class PostalAddress
Property Street1 As String[code]....