How To Code Multiple Datasets
Oct 16, 2009
I have a report where I need the same data, but for four separate date ranges. Currently this data is based on one month, so it's just one dataset. But now I am trying to do this with four separate datasets, where each one is filtered on each of the four date ranges. I setup my WHILE loop to loop thru all four dates. But I'm having trouble now with distinct naming these datasets. Is this the best way to do this? It looks like if I used multiple datatables for one dataset, I'd have to define each datatable column. Here is my current dataset commandstring
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Jun 28, 2011
I have a dilemma. The program I"m trying to complete is one VB project with three (3) forms. The first form will act as a menu dialog box. The other two forms will have a dataset (database) on each form. The first form will have a button when clicked it will pull up form 2 and the second button when clicked will bring up form 3. What I add the dataset to form 2 everything is fine. I can see my tableadapter, dataset and so on. Now, when I add the second dataset (database) to form 3, I loose my, dataset and so on. It doesn't appear on any of the two forms (in designer)tableadapter.
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Jan 19, 2010
I have an encrypted SQL Server stored proc that I run with (or the vb .net equivalent code of):[code]this returns 2 datasets and the output parameters for the results, the datasets are made up of various table joins etc, one holds the header record and one the detail records.I need to get the 2 datasets into a structure in VB .net (e.g. linq, sqldatareader, typed datasets) so that I can code with them, I don't know what tables any of this comes from and there are alot of them Whooopeee...I came close using Linq to SQL and IMultipleResults but got frustrated when I had to recode it every time I made a change to the designer file.
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Nov 24, 2010
Im currently making a program. It loads data from database fields into an combo box. Everything works so far, It just seems to be a mess. Do i need to have all the datasets and data adapters? or can i get away with just using 1 of each. It seems like im doing it wrong, and although it works it seems like a difficult and messy way of doing it.
Also i would like to assign the firshermenID to a variable depending on the fisherman name that is selected in the combo box. When button is pressed: id = fishermanID of the current fisherman (cmbFisherman.text)
[Code]...
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Jul 12, 2010
I have a form with multiple DataSets (filled by multiple Stored Procedures) and corresponding DataAdapters. Associated with the DataApters are commands for UPDATE, INSERT......... Before using the DA Update I am using 'If DSxyz.HasChanges(). It seems that when I make a change anywhere on the form affecting 1 dataset, all of the datasets show this to be true. Why should changing one dataset on a form cause all of the datasets to show changes?
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Apr 13, 2012
I have 4 ComboBoxen and 1 DatagridView into one Form. I make a code, for binding with 5 tables, each is own dataSet and dataAdaptor Is it possible to use one DataSet and one DataAdaptor for 5 Tables, so my code become shorter.
I think the solution is a SQL SELECT query, but i dont no for sure.If it is a SELECT query, ore something else, cane anybody help with make the code i need.
[Code]...
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May 14, 2010
I'm using vb.net and have a small project that displays data from a SQL Server database. I used the Data Source Configuration Wizard to create a dataset. I've noticed web sites and code samples that show coding to connect to a database and I've tried that with success. But I'm wondering what the difference is between the two and which is better to use. The only difference I can tell so far is that by using the wizard, the textboxes on my form are bound and I have a lot less coding to do. By hard-coding the connection, I have to bind the textboxes in code. Is that the only difference?
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Dec 23, 2011
I already know how to call insert, update, delete & select procedures in DataSet.xsd window. And I also know how to call queries by table adapters. But I just found out that its not possible to call all functions by queries (such as insert). It works when I test the query but when I try to add it, it says "Failed to get schema for this query". So I built a few stored procedures which do many functions (such as transaction, insert, update etc...). But I am unable to use these stored procedures in VB form. I found some tutorials mentioning that it can be done by defining connections and some other stuffs with which I don't want this to be. I want to call these procedures by writing code in VB code editor window with DataSets, TableAdapters, BindingSource etc...
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Jul 1, 2009
How to comment multiple lines of code/block of code in VB?
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Nov 5, 2010
I have this code so I was wondering how do you put in multiple files: E.g:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
If System.IO.File.Exists("C:fileiwannadelete") Then
My.Computer.FileSystem.DeleteFile("C:fileiwannadelete")
End If
End Sub
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Apr 12, 2012
I have the following code which is used by 7 comboboxes, the only difference is the combobox1 to 7 and the DataGridView5 to 11. In VB6 I would have used arrays, is there any way to write the code once or do I have 7 ComboBox1_SelectedIndexChanged subs.
[Code]...
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Aug 26, 2010
I have a working form that shows the product flow in a manufacturing plant.For various reasons,I need to create another form that is a duplicate of the original, but rotated 180 degrees.All of the underlying code to fill and handle events on the two forms will be identical.I don't want to have to duplicate and manage two sets of code to handle both forms.What is the best way to handle this?
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Jul 19, 2010
I am really new at this and need to find out how to code multiple events so that I don't have to type the same thing out many times as you can see I have done below. I am sure there is a way to do it but I am lost. It is for a Mastermind game and I have created 8 buttons from which you can drag the text number on the button into a text box. there are 20 text boxes. 5 x rows of 4 textboxes.I have started to try to do it for button 1 but I am confused. I have tried to copy from other people's code but it is just confusing me more. Can someone please put me on the right track. [code]...
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Jul 30, 2009
I'm trying to work with an ODBC driver for Interbase in VS2008 (vb). I succesfully inserted the data tables I want to use in the project datasource. Then I want to add some rows in one of the tables of the datasource. I used myDataSet.addTABLENAMErow(field1, field2, ...).The compiler gives me no error, but when I open the database with InterbaseConsole, the line I've add is not there. Do I do something wrong? Must I open/save the database (how do I do so). I've tried meDataSet.AcceptChanges whitout result.I'm not used to work with Datasets and tables...
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Mar 25, 2009
Though I know your site ask for some effort on my part im not exactly sure where to start.. I know how to code some decent things and such but recently I wanted to make a serial code system.. What Im looking for is to have a list of Serials on my website (possibly through MySQL? Or something simpler Not sure on this either) I know about the obvious
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
If TextBox1.Text = "BLAH123" Then
MsgBox("Valid Registration key. Thank you")
[CODE]...
But I do not like this system as I have no control over multiple uses. I want to pull the keys from my website (hell through a notepad if its easier) therefore allowing me to delete and add serial keys as needed..
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Feb 5, 2011
I have an app that is going to sign into my social bookmarking sites...I already have accounts on all of these sites but I want to programmaticly click on these links but each link has a different name for the link.Each link does has the same inner text info in the HTML but different urls for the links <a href="submit.php?" rel="nofollow">Submit</a>...How can I program my app to locate and click on the link that has the <a href="" rel= "nofollow">Submit</a>..Is there a way to ignore the information in between the ""?
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Nov 13, 2010
How can I tell something to use a code without completely adding it in that sub again? I have some code that will be used alot within my program. I could write a DLL, but I don't know how to use those!
Here is my code:
Dim str1 As String = System.IO.File.ReadAllText(Me.OpenFileDialog1.FileName)
Dim s2 As String = str1.Replace(".[1gs5]", "a")
s2 = s2.Replace(".[u775]", "b")
s2 = s2.Replace(".[fsef]", "c")
[Code]...
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Oct 15, 2011
I need to rename/move a file to a different folder after downloading. When I log into the customer's FTP site via the url, user, password it put in into a particular folder. I can download these files using the URI but I cannot Rename (Move) into a different folder (i.e. DONE). I get a The remote server returned an error: (550) File unavailable (e.g., file not found, no access using the FTP Class and FTPClient. [url]...
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Feb 5, 2010
I am trying to create a program that can upload many files at a time to an FTP site. I don't want to use a dialog box. I want to be able to specify a certain requirement in my code (for ex. all files that begin with "abc_"). I was able to find a lot of code online for uploading a single file, but all the code that I found for mulitiple files were either very lengthy or done by bringing in a new library
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Jan 29, 2010
Anyway to view the content of a dataset or datatable in debug? I don't mean looking up a specific element of the dataset but to view the hole thing.
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Mar 14, 2009
difference between the two statements given below
1. Dim ds as new DataSet
2.Dim ds as DataSet = New DataSet
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Oct 8, 2010
I'm trying to combine two datasets, each with 1 datatable and each having the same schemas. Datatable 1 would have a list of records. Datatable two may, or may no, have some or all of the records from table 1 plus more records. I would like to remove all the records from table 2 that are present in table 1.
This is what I got so far:
For Each table1 As DataTable In ds.Tables
For Each row1 As DataRow In ds.Tables(0).Rows
ds.Tables(0).PrimaryKey = New DataColumn() {ds.Tables(0).Columns(0)} 'Where 0 is the index of the column that's your key
row2 = ds2.Tables(0).Rows.Find(row1("ID"))
'if its found, delete it
Next
Next
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Aug 2, 2011
how to join two datasets together.
First Dataset
Dim sql As String
sql = "SELECT payment.Debtor, SUM(Value_invoice) AS before_this_month,debtor.nama FROM Payment INNER JOIN dbo.debtor ON Payment.Debtor = debtor.debtor" & _
[code]....
Now i just want to either inner join or left join PaymentBeforeThisMonth and PaymentThisMonth into another dataset?
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Feb 10, 2011
I have a dataset that contains only employee ID's. I need to loop through that dataset and for each employee ID I need to loop through several other datasets and pull data. I need help with this looping syntax. Here is a sample of some code that I am receiving an error with:
Dim EMPID as Integer
Dim CommandEmpid As New OleDb.OleDbCommand
Dim EmpidDS As New DataSet
[code]....
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Mar 2, 2011
I have a form that needs to load data for 20 different combo boxes - the data is always the same. To get the combo boxes to function properly i need to create a separate dataset for each combo box. Doing this when the form loads takes it about 7 seconds each time a search result is double clicked and the form pops up displaying the correct data. The form is bound to the main table. Is there a way to store these data sets in memory somewhere so the user can close the form but still have them loaded? I can put this code behind the login form and it works until the form is closed, then the combo's no longer load.[code]
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Jan 8, 2010
i want to check if datasets have changes and after that use msgbox (vbYesNoCancel) when program closes ,when i wrote this code it had error "Operator 'Or' is not defined for types 'System.Data.dataset' and Boolean"..[code]
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May 17, 2009
I want to use my main dataset (dbds) on a second form. It's simple, on my main form, the user clicks a button, opens a new form, they enter an item number and I want to find that row, and change a value in another column of that same row, and have that be in effect onthe main dataset to send back to the database.[code]...
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Jun 5, 2011
I want to draw three straight lines on a form. if the following code is correct:
Private Sub Form1_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles Me.Paint
Dim Line1 As System.Drawing.Graphics
[CODE]........
Can I use only one variable (Line1) to draw three straight lines?
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May 18, 2010
I am attempting to hard code a richtextbox that has multiline characters upon the Load_Event. However, whenever I use the "&controlchars.newline _ " I get a syntax error and end of statement expected error.
[Code]...
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Mar 16, 2010
I want to print contents of a ListView, currently I can print on one page only so my question is how do I improve my code to print on multiple pages. I've read little about the HasMorePages property but no idea how to use it in this context. Heres my code:I have a PrintPreviewDialog and Print Document to assist in printing [code] I understand most part of this code but not all so its kinda hard to follow the program flow to make any big changes myself so if possible can someone please comment the code a bit? how printing works in .NET because I only understand parts of it so having trouble joining the pieces together if that makes sense?
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