I've only dealt with firing a single SQL statement at a SQLServer table and returning a single result... easy....
however....
is there a way to fire a dual sql command and load the results into respective tables within a dataset?.. I'm thinking something along these lines (this code of course does not work)
Dim ds As New DataSet
Dim dt1 As DataTable = ds.Tables(0)
Dim dt2 As DataTable = ds.Tables(1)
I have two Datagrids, One grid has all the customers garments on it with style number and contact length. The other grid has the users who have garment issued to them. the style number is in both grids. I need to loop through the users grid and say if the contract number is 1 from the first grid then the contract date on the second grid will be todays date + 365 days (year contract) I have looked at using a stored procedure and also a for each command but I am just getting stuck with it all. [Code]
I have redirected the results of the command prompt to a multi-line textbox and i want to get the line number of the error. [code] how would i get the line numbers? it should get 90,92,95.
last year i have written a simple application with a listview filled by a sql-server with patient data.When the application opens, then the actual month is displayed. Now i get the db-entries from last year not from this year.Here is the function:
Private Function getPatienten()As DataSet Dim selStr As String = "SELECT ID, Nachname, Vorname, Dauer, Fachbereich, Datum FROM tbl_station11 WHERE month(Datum) = month(GetDate()) ORDER BY Datum"
In my first application I need to create a multi-level "IF" statement and I am a little lost on how to proceed. The idea is to do figure out an estimate on costs based on the quantity of products being sold. I can do this in Excel, but the VB code escapes me.
So I'll show you in psuedo code what I want to do. IF comboBoxA = 1 and comboBoxB = 1 then value X IF comboBoxA = 2 and comboBoxB = 1 then value X If comboBoxA > 3 and comboBoxB > 1 then (comboxBoxA * costA) + (comboBoxB * costB) = Value X
I have another IF statement that will work off the calculations here. Haven't figured this one out yet, but I haven't gotten there yet in my form. If Value X > Y Amount then Offer product Z as a better idea
i have a table with information on how much tax a company has to pay, and i need to put it into a select case statement that will let me display the results, but i have no idea how to do that. this is the table:
Sales Income OverBut Not OverCompany Tax IsOf the Amount Over $0 $50,000 1% $0 $50,000 $150,000 $500 + 2% $50,000 $150,000 $300,000 $3,000 + 3% $150,000 $300,000 $500,000 $9,000 + 4% $300,000 $500,000 - $20,000 + 5% $500,000
how do i display this? i have no clue where to start..
I have a DataGridView bound to a DataSet. I only want a selection of columns displayed on the DataGridView rather than all. I then have a text box which I want to display a value (Version_no column) from the column not showing in the DataGridView. Is this possible?
Would it be better to have a hidden column on the DataGridView and use this value for the text box?
Dim UpdateThreadStart As New ThreadStart(AddressOf QueryDataBase) Dim CallDataBindToDataGrid As New MethodInvoker(AddressOf Me.DataBindToDataGrid) Dim MyDataSet As New DataSet
I'm on my way to MSDN but thought I'd stop by here first because the answers are usually more cogent.I have a test bed that mimmicks my product app. The general architecture is a factory that builds/instantiates a number of objects (device controllers) that are scalable in number based on requirement. Each object has a threaded portion that reads a device. This way, each object can read its own device simultaneously with all the others. To perform the read, the object calls a routine in a Module that houses the device interfaces. Interestingly (and happily), it seems like each thread has its own copy of the Module routine.
The test bed seems to verify what I'm seeing in the app. In the testbed, a 500 mil second delay is substituted for the device call. Even enclosing the test module portion that hosts the delay in a Synclock results in multi-threaded execution of the pseudo device call. I haven't tested for data yet, but this seems to indicate that when the module routine is called from controller object, it too carries it's own copy of the data just like the calling object. As a long time c++ programmer...that don't quite seem right.
[code] BUT, in code, watching the locals window for rec.EOF and rec.BOF both return true and therefore no results.Why does this work in VB Query Designer but not in code? If I remove the WHERE statement than the results return fine as expected.But its returning ALL of the results which is no good.
I do however have a slight background with VBA particularly with MS Access, so I am not completely lost.I am recreating my Access database application in VB.net.I created a new project and added an Access database through the wizard, which automatically created a dataset for the database. On one of my forms I have, esentially, a search form. What I want to happen is have a text box, and as I start typing display a search result from my customers table in the list box under it. So for example, I type "A" and all customer names that start with "A" are displayed in the list box.I continue typing with a "p" (full string is now "Ap"), then all customer names that start with "Ap" are displayed and so on...
I did search on my own first before posting this and found a few tips but cant really get it to work the way I want. This is what I have... I know I would put this code in the keypress event of my test box, but just until I get it working I attached it to a button to search. (I basically got this online and not even sure its the correct usage.
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click 'Create a dataview[code].....
The item in red is where i get an error. it sucessfully builds and i open the find form enter a last name that I know is in the customers table, but I get the error "Cannot find Column ["whatever name i typed inthe text box"].So first of all is this the correct way of going about what I want to achieve?If so how can I get it to work?BTW the next step for the user would be to double click the customer in the list box they are searching for to open the customer Details form for that customer, so I would need an ID or Index attached to that item to be able to open that record in another form.
I have a form with a Listview. I have not manually added columns through the gui so I need to do this too.I have a stored procedure which returns two sets of data. One is titled url and the other occurrences in he procedure.I have bound the results to a dataset. I am having problems taking that dataset and putting the results in the listview. Here is the code I have:
[code]...
It is not creating the column headers. It is not putting both results in the view. It is only putting the first column "url" It is not putting the next row on the next line, but placing it in the next column where the occurrences should be going. It is also not resizing the columns to match the data , but keeping at the size assigned (I assume) in the columns.add section.
I am attempting something along the line of below mentioned code. Though it works in single dimension array. How to make it work with 2-d array?
Dim arrayord(,) As String = {ds.Tables(0).Rows(3).ItemArray, ds.Tables(0).Rows(23).ItemArray}
But it throws the following error.Error 8 Value of type '1-dimensional array of 1-dimensional array of Object' cannot be converted to '2-dimensional array of String' because '1-dimensional array of Object' is not derived from 'String'.
I currently have an excel spreadsheet that has a macro that displays information from my sql server. Everything works fine with it. Im trying to embed that into my vb project though. Anyone know what the best route to go would be to do this. Should I try to convert the vba macro and display the results to a dataset?Or should I try to recreate the connection through VB to display the results? or is that sort of the same thing? Or should I try something different? [Code]
I want to develop a program that uses an online API, with GET and POST requests, and I want to know how to make the requests within the program (without the user seeing a web page), and then download the results into the program so I can parse them
somehow combine the results of separate Fill queries on a single dataset?Basically, I'm trying to implement a 'Filter' function, whereby, the user can filter the records in a DataSet according to specific criteria.
Heres my issue, I am retrieving data from xml and populating a DataSet with the results into multiple DataTables but i have an issue where an item is repeated in my input data and it is causing it to exception because of the constraints imposed between these tables. how can i determine if a row exists prior to adding the DataRow and thus not include it in my DataTable?
There is a "how do I video" on how to properly control updates, inserts and deletes in multi-user applications on forms that edit master-detail related data. [URL] Massi worked through the process using Order (OrderID is PK) as the master table and Order Detail (OrderDetaiID is PK) as a related table in dataGridView. The dataGridView automatically generate orderDetailID whenever the mouse enters in a new row. I am doing a similar form, but placing order form and orderDetail form in two separate tabs in a tabcontrol, and also using Details view for both tables. When I click "new" button in BindingNavigator, the orderID is automatically generated. If I use dataGridView for my orderDetail tab, then the orderDetailID is automatically generated when the mouse enters. This allow me to insert/update tables correctly. However I need the Details View for my orderDetail form too. How do I get a orderDetailID automatically generated when user insert a new order and have the mouse click on OrderDtail tab?
I am returning to VB and coding after several years of trying to be out of coding :) I would like in grabbing data retrieved from a SQL database call into an array of sorts so that I can quickly close the database connection. I am having some trouble remembering how to do this. Most of the posts I've found say to use the dataSet() functionality, but I do not have a table name for the structure to mimic. I am selecting from several tables on a remote server.
I want to know how to use the ASYNC CTP to manage the querying of a SQL Database with a SQL Select statement and use a SQLDataAdapter to fill in a DataSet. I have downloaded the VS2010 SP1 and the ASYNC CTP, I have also reviewed the videos on the MSDN site and the documentation included.
my program is "live" and my customer has troubles because it doesn't functioning as well as it should.I don't know what happen, did I changed something or not but suddenly data won't save to database from newly created forms. Beside this form I have additional 20 forms and everything is working like a charm and I use same code logic to save data to database. I tried to find myself what could be the reason, check by entering data directly to database table (works fine), check insert statement of dataset table (seems fine, too) and everything I could imagine. But now I ran out of ideas and I had to ask here.
Also, I added 3 fields to database table (nvarchar, int and decimal). All 3 of them allow nulls. I changed dataset and data entry form and now data won't insert if I dont enter values to int and decimal fields. Also, this decimal field doesn't accept 0 value if enter but if I assign value 0 from the code than it is ok. I'm not sure if I somehow changed concurrency and somewhere. I tried to find where I can change it but I couldn't find it. I use Visual Studio 2008 and Sql Server 2005 Express. Language vb.net.
I am trying to work programmatically with a dataset. The tableAdapter was created by dragging and dropping the dataset on my form, and then deleting the binding navigator and dataviewgrid. The problem I am having is when I am trying to delete a record that is DBNull. The dataset.delete( ) call creates fields for each of the fields, along with their data type (say Description as String). but I get an error whenever the field has a DBNull value.
The error is Throw New Global.System.Data.StrongTypingException("The value for column 'Description' in table 'Course' is DBNull."I do have Option Strict On, but the problem exists even if I turn it off.
I am creating XML files and load them back again. I use this following code to write xml to a folder. the code below will put date and time to the file name. and this code works fine.[code]...
Again, I want to load the last xml file back and put in a dataset. I normally write code like [url]...
I have the following function: Public Shared Function GetLookupTableData(ByVal TableName As String, ByVal WhereClause As String) As DataTable
[Code]...
With one xml file it loads the schema and data just fine, but with another xml file it only loads the schema and not the data. There's no error thrown - just no data loaded.
Anybody have any ideas? I've attached the .xml file for your review. I would have attached the .xsd but the system wouldn't allow it.
so what I want to do should be pretty simple. I've been following the examples found here Using the BackgroundWorker Component - VBForums . I've been successful, but I'm not smart enough to put it in my project.
What I'd like to happen is this
1. I hit a button to load data from a dataset....
2. have a progress bar show until this action is complete.
The main problem is that I can't figure out how to tie the "progress bar" to the action of "pulling the dataset"
I'm sure this is a crazy question for you all, but hey...
Would I put all of the coding in the button_Click sub?
I have a comma delimited text file. I need to write this file to xml. I was thinking of first loading a dataset from the text document and then working from there. Is this a good way to go about it?Also how would I load the dataset from a comma delimited text file. The text is enclosed in quotation marks which I want to be removed
