I have a GUI that is running for a form, let's call it Class xWindow. It has finished processing data and is simply waiting for the user to press a button, i.e. the main thread has nothing to do. Just before it finished processing, it kicked started something that has a callback function which occurs in a new thread (e.g. a system timer or a Bonjour callback to say that a service has been found on a port). This callback occurs within the xWindow class.
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
[Code]...
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 modified a program in Expressions Blend that is C# I want to use this program as part of a VB program that I am creating. Is it possible to create a VS 2008 application using mixed languages? If not I can build the C# app to an Executable, but then how do I get it to run from within my VB app?
I have an application, written in C#, which needs some functionality from VB.NET (better said, something valid in CIL but not provided in C#). So I have an executable and a library file.
Problem: It has to be published in one file and may not be split to different assemblies!
But: It's a WPF application, ILMerge will not work.
What could I do?Is it possible to generate (performant) IL on the fly?
I'm trying to create a program that will merge two data tables (one from a database on a network drive, the other is found in a database on the local machine). Each datatable is identical in structure, only (maybe) differs in content. The structure has a primary key, dateCreated, and dateLastEdited fields (plus other fields). I would like to merge down from the network to the local database. If the primary key does not exist on the local db but does on the network, copy from the network db to the local table. If it does exist, check the dateLastEdited column and copy the latest row to the local table.
How would i set up the code to do this? Any assistance would be great.
I'm trying to merge 2 files - a 'simple' string replace. 2 files - an ini-style data file that has <descriptor>=<value> with about 70 rows created by web-form and database, and a csv template file with 2500 rows that has 12 fields, but the values will either be in fields (4) and (5) OR (6) and (7). The data fields won't always be in the same order. I'm reading a line from the Template file, then looping through the data file looking for a descriptor match then replacing it with the value, but because they are in pairs per line, I have to loop twice; then loop to the next template file and so on. Then cleanup to remove the unused descriptors.
I have been unable to crack this for about a week. I wrote a VBScript version yesterday in about an hour and it worked flawlessly first time taking 2 seconds to produce the csv output file exactly as required.
Tried reading the data file and looping through the template, tried almost every combination of Using/End using; For/next, Do Until, Do while, etc. Used Streamreader, File.ReadAllLines, I've read msdn till I know it by heart, but no use. You name it, I've tried it. Must have missed something or it would work though.
You are my final hope. The problem part of the code is below...
I need to marge two datatable with condition. i table data come from local XML Database and another data come from remote sql data if any update made at remote datatable and then marge with local datatable. i wrote a code below :
Public Sub MargeTwoTable() Dim SQL As String = "" Dim RemoteTable As New DataTable Dim LocalTable As DataTable
[code]....
as you see in my code data come from remote database which update date getter then local database . Both table are same and "ID" is primary key. I code is working well. But problem is that when data more then 1000 updated record so this function take too long in loops.
i write a code like : Dim mm() As DataRow = LocalTable.Select("ID = '" & RemoteTable.Rows(i).Item("ID") & "'"). for finding local datatable id row so when data is more then 1000 it take too long because localtable record more than 100000 records. So I need someone help to modify my code what the best way to write the code.
I need to marge two datatables with condition. I have a datatable where the data comes from a local XML Database and another datatable where the data comes from a remote SQL Server. If any update made in the remote datatable I need to update/merge with the local datatable. Here is what I have so far:
Public Sub MargeTwoTable() Dim SQL As String = "" Dim RemoteTable As New DataTable Dim LocalTable As DataTable
[code]....
In this code data comes from the remote database which updates a date getter then the local database . Both tables have "ID" as the primary key. The code is working well, but the problem is that when more than 1000 records are updated this function takes too long using loops.
I have a DLL that was created in VC++ 2008. Can I add it to my VB.net project? I'd like it so that when I build the program, I don't have to have the DLL in the folder with the .exe.
Is it possible to merge two For Loops into one? I need this because I am using two for loops (1 to 100,000) to work with the data in a collection. The problem with this code is that it takes more than two hours two finish:
I have a combobox which I want to populate with Locations. The Locations are in the Location table. BUT If the location is in the Item Location AKA the Stock Item has that Location.. but I can't think of a different way of doing this. There must be a simpler way....
Using word 2003, merging to a new document. I want the macros in the template to be in the new document. I'm using the macros to control printer desitination, each template can go to a different printer.
The problem is I want merge duplicate serial_no into one row which the value of testong adding to new column. I have tried many ways, but I can't find the solution. Here is my code behind :
I have 2 arrays, I don't know their length...I wanna copy both arrays into 1 single array.So the length of output array will be sum of my 2 input arrays.I know I should use Array.Copy but don't know how, for my case, it won't merge the contents of 2 arrays into 1.I also used this but won't work:
My code got an error at messagebox.show at messagebox said System.NullReferenceException was unhandled Message="Object reference not set to an instance of an object"What is wrong? (dt1 and dt2 are all ok. They are have only one columnd: ID)
I need to add in mail merge functionality to my application. I don't have MS Office, but I do have MS Works (which does have mail merge functionality, in the word processor application). Can the MS Works Mail merge functionality be accessed from VB.NET code.
Private Sub DataGridView1_CellPainting(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DataGridViewCellPaintingEventArgs) Handles DataGridView1.CellPainting 'Here 0 is the ColumnIndex to for merging cells and 14 is the RowIndex till 'where merging
Is the following grid layout possible with DataGridView in VB.net? Kind of similar to html table layout. I'm adding data cell by cell. However I'm not sure on how to get the layout for Group A & Group B Cells. -------------------------------------------------| | Item11 | Item12 | Item13 | |-----------------------------------------| | Item21 | Item22 | Item23 | GroupA |-----------------------------------------| | Item31 | Item32 | Item33 | |-----------------------------------------| | Item41 | Item42 | Item43 | -------------------------------------------------| | Item51 | Item52 | Item53 | |-----------------------------------------| GroupB | Item61 | Item62 | Item63 | |-----------------------------------------| |Item71 | Item72 | Item73 | -------------------------------------------------|
I'm trying to merge two datasets based on these rules: 1. With ds1 and ds2, If the Unique Key from ds1 is not found in ds2, copy it to ds2 and move to next row in the table, else, goto the next part 2. If the unique key in ds2 is found in ds1, check the DateLastEdited row. a. If DateLastEdited in ds2 is greater then in ds1, copy the row from ds2 to ds1, else , do nothing
I'm just having trouble with the loops. Here's what I have: Dim ds1 As DataSet = fillNetwork() 'this function fills ds1 with the dataset from a table found on a network Dim ds2 As DataSet = fillLocal() 'this function fills ds1 with the dataset from a table found on local drive Dim returnRows() As System.Data.DataRow = Nothing For Each dtDs1 In ds1.Tables [Code] ..... This bit of code is just trying to segregate the one that are in both tables from the ones that are just in one table.
I am trying to create a front end to a) add records to a mysql db (without been able to view, or edit or delete) which i have working and press a magic button which sets up a word mailmerge doc so that the venue managers just have to edit the document and click send. The code I have so far for this bit is
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click If Venue.Text = "The Old Tramshed" Then ConnectDatabase()
[code].....
The idea been, grab the email and firstname from the database. Write them to a locally stored word document which is used as the datasource for the mail merge. It opens the correct template and seems to create the same number of documents as is in the database, but i cannot click send in word (except to internet fax) as the email bit is greyed out.I was expecting the document to be started as an e-mail merge document, which the venue managers would then already have the correct template, put on the details they wish to send and then click finish mail merge and send documents.
I have a word document that has three fields in it (First Name, Last Name, Date) plus a page of common text (text that remains the same for everyone). I want my vb.net project to open the word document, and use the data from a listview (the listview has three columns: First Name, Last Name, Date) to fill in fields in the word document (doing a mail merge so that each row in the listview produces a new page in the document, with the corresponding First Name, Last Name, Date.
i already forget how to start when write the programming using vb.net.i already try to study back the basic of vb.net.but the step to build system merge using vb.net i didn't how to start it.
