VS 2010 DataSet - Using Variables In Query
Apr 26, 2011I added queries to my dataset via the designer. Is there a way to use variables in those queries?
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Declaring Variables With New DataSet Vs DataSet?
Apr 16, 2010What is the impact of creating variables using:
Dim ds as New DataSet
ds = GetActualData()
where GetActualData() also creates a New DataSet and returns it? Does the original empty DataSet that was 'New'ed just get left in the Heap?
What if this kind of code was in many places? Would that affect the ASP.NET process and cause it to recycle sooner?
Using Variables In SQL Query?
Aug 12, 2008I have a DataGridView of which is being populated via a table adaptor.
I can populate it with a query where the value is statically assigned in the query.
What I'd like is a textbox where I can type in a variable for the query and then populate the datagridview.
Fill Tables In Dataset By Data Variables?
May 22, 2012I need to fill a datatable(in data set) row by row by providing the the data by variables in VB.Net. The variables assigns its value by loop.. so the datatable row should be filled row by row until the loop ends. There are three columns in the table. so the table should fill with different kind of datatype variables.
View 1 RepliesPassing Variables To A Sql Query?
Nov 19, 2010I have two forms and I'm trying to pass a declared variable from form1 to form2 and then pass that variable in a sql query that I have in a dataset that is bound to my form. I know that my query works but it's not producing any data. I have debugged my form and can see the data being passed in the variables elsewhere on the page but I'm not sure of the syntax within the query.
[Code]...
Error After Adding Variables In SQL Query
Feb 18, 2009I'm having issues w/ querying the database w/ user selected dates. Hardcoded everything worked fine but when I started to use the DateTimePicker things stopped working.
Dim sqlcn As New SqlConnection(db.dbcn)
Dim cmd As SqlCommand = sqlcn.CreateCommand()
cmd.CommandText = "SELECT * FROM TABLE " _
& "WHERE CHK_DT BETWEEN @BeginDt and @EndDt"
[Code]...
Replacing Two Variables In A Query String?
Dec 20, 2010I am wondering how to replace two variables in a query from selections that the user makes. One variable is chosen by a combo box called cboYEARMONTH and the other is selected from a list view called employeeListView. I know that I can use .replace to insert the YearMonth into the string but, how do I also replace the EmployeeID in the query string?
[Code]...
Using MySQL Query Results As Variables?
Mar 15, 2012I am finding it exceptionally difficult to pass an sql query result (string) into a variable.No matter what I try, I can't seem to get anything but boolean output from my reader function.I need to obtain staff "account type" from my staff table and then define that account type in a variable.
View 1 RepliesAssign The Results Of An SQL Query To Multiple Variables In .NET?
Mar 30, 2012This is my first attempt at writing a program that accesses a database from scratch, rather than simply modifying my company's existing programs. It's also my first time using VB.Net 2010, as our other programs are written in VB6 and VB.NET 2003. We're using SQL Server 2000 but should be upgrading to 2008 soon, if that's relevant.I can successfully connect to the database and pull data via query and assign, for instance, the results to a combobox, such as here:
[Code]...
How do I execute a query so as to assign each field of the returned row to individual variables?
Sql - Inserting Variables Into A Query String - It Won't Work
Apr 22, 2010Basically i have a query string that when i hardcode in the catalogue value its fine. when I try adding it via a variable it just doesn't pick it up.This works:
Dim WaspConnection As New SqlConnection("Data Source=JURA;Initial Catalog=WaspTrackAsset_NROI;User id=" & ConfigurationManager.AppSettings("WASPDBUserName") & ";Password='" & ConfigurationManager.AppSettings("WASPDBPassword").ToString & "';")
This doesn't:
Public Sub GetWASPAcr()
connection.Open()
Dim dt As New DataTable()
Dim username As String = HttpContext.Current.User.Identity.Name
[code]....
When I debug the catalog is empty in the query string but the WASP variable holds the value "WaspTrackAsset_NROI"
VS 2008 : Build Query Based On Two Variables?
Dec 29, 2010In my program I have a combo box that the user selects a date from and a list view that the user selects an employee ID from. How do I properly design my database query string to use both the date selected and the employee ID selected? The date is stored in a variable called YearMonth and the employee ID is stored in a variable called EmpID.
Here is what I am trying to do with my query:
Dim ExactQuery As String = _
"SELECT * " & _
"FROM[JobTypeExact_Query] WHERE (EMPID = ?) AND WHERE (YEARMONTH = YM)" 'Define Exact job type query
[code]....
Class Variables - Holding Data From SQL Server Query
Oct 1, 2009I am creating an ASP.Net page with VB.Net codebehind. I am using a class variable to hold data (named ods see below) from a SQL Server query so I do not have to keep going back out to the server. The class variable gets loaded ok and I populate a grid data with this dataset. However when I need to go back in and reference the dataset again, I get an error and I come to find out my dataset no longer holds the data.
Here is my declaration in my code behind:
Partial Public
Class LotTrackingMain
Inherits System.Web.UI.Page
Private con
As SqlConnection =
Nothing
Private ods
As
New DataSet
How Does One Complete This Query In A Dataset (.NET)
Mar 30, 2009How does one complete this query in a Dataset(VB.NET)?
Declare @Username as varchar(20), @Address as Varchar(20)
Select @Username=Username, @Address=Address
from EmployeeDB.EmpInfo
Where ID = 1
Query A Dataset With SQL Queries?
Jun 30, 2007How do you query a Dataset with SQL queries? I'm using VB with Visual Studio 2005. I've got a large library of SQL queries I'd like to run in-memory on a Dataset.All the examples in the documentation show how to "query a dataset with code," but none show how to run a simple SQL query against a dataset. I've seen other threads that say you can do so, but no code examples. Can anyone provide sample code to show how you would run a simple SQL "Select..." query (using the same syntax you would use to query a database) on an in-memory dataset?
View 3 RepliesQuery In DataSet / How To Run In Code
Jan 25, 2011I have created a query in the DataSet Designer and now I would like to run this in a code to get the result of the query. Its just number which I get back and with this number I would like to continue working in the code.I know when I have a field connected with the Data sources I can launch it like this:Me.ProduccionTableAdapter.DowntimeHorasTrabajadas(Me.SHFDataSet.Produccion, datefrom:=DateTimePicker_From.Text, dateto:= DateTimePicker_ To.Text)but how do I do this when I dont wanna associate it with a text field and I just want to get the value into a variable?
View 1 RepliesAccess Query - How To Use DataAdapter With DataSet
Jun 3, 2011I have access Query have more than one table. I want to insert into it. I cannot insert into it by CommandBuilder coz CommandBuilder for one table only so how can I do that using DataAdapter with dataset.
View 6 RepliesCan't Query Access - Not Filling Dataset?
Aug 26, 2011The SQL string won't return data from Access. I've tested this exact SQL String in Access and it works fine.First of all, Am I getting a SQL query from Access in the proper manner?Second... should I be using a stored procedure for this? Or is making a query from tables like this a good practice? Third, if I'm doing it right, why won't Access query return and fill my dataset?These are the results I'm getting.
Connection State = 1
Tables in Dataset = 0
Where am I going wrong?
SQL:
SELECT PageSetupData.Size, PageSetupData.Category,
PrinterList.Location, PageSetupData.isPlotter, PrinterList.LocationSuffix,
PaperSizeData.PrinterName, PrinterList.HasAltPrinter, PageSetupData.SetupTitle,
[code]....
Dataset Query Validates Incorrectly
Sep 8, 2009I have a data table in my dataset which was created with the following script.[code]
View 6 RepliesForms :: Dataset Query Not Acting Right?
Nov 29, 2011I have an application that uses bound controls on the form. I have a dataset associated with my form and have a custom query written for one of my tables that is supposed to get two fields in the database and order them by their ID in descending order. However, when I run the program, the bound controls do not contain the last record, but the first.
View 8 RepliesQuery - Pull Single Value Not Dataset
Jul 27, 2009I've written a bunch of queries that bring back a set of results that look like the following. I have a user level column in an employees table which I'm trying to pull the value from. Only one result (number) will ever be returned. For instance the query will be like: Select username, userlevel from employees where username = "joe" So i'd be bringing back just the level, say 7.
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Query Dataset And Output To Text Box?
Oct 24, 2009I have a dataset called Me.VelocipedeDBDataSet and there is a table within the dataset called Contact.How can i check the contact table and output the results of rows which have a value for an attribute called AccntRep that matches a global variable known as repNo
I had though that the solution may be something like
If Me.VelocipedeDBDataSet.Contact.Rows.Contains(repNo) Then
Panel3.Visible = True
MsgBox("Account Rep Found", MsgBoxStyle.OkOnly, "Account Rep")
End If
but it has not worked,
Query On The Data Bank With Ado, Put Everything In A Dataset?
Oct 6, 2010I query on the data bank with Ado, put everything in a Dataset, changes the data and then lets it write in the table. How can it be that is written in all lines except the first one? I do not find any error. Someone can help me? Here the code:
[Code]...
Pass Parameter To A Dataset Query (.net Form App)
Jun 10, 2011how to pass a parameter to a predefined parameter in a dataset. I've found everywhere a solution if you build the sqldata adapter and the dataset in the code. Then you can pass the parameter like: da.SelectCommand.Parameters.Add("@param1", SqlDbType.Char).Value = param1_variable (as example)
But if you have builded a dataset (with table adapters), and then in the form app you want just to pass the param1 to a DataGridView1 (as example) which is using the table adapter, I did not find how to do this.
Populate Typed Dataset Wit UNION ALL SQL Query?
Jul 27, 2010I don't have the same problem when using an untyped dataset.
OK. I have a typed dataset MyDS with a typed datatable MyTable (TableID, Title, Message).
The table gets filled with results from two tables, using a UNION ALL
Select
TableAID,
TableATitle,
[Code]....
Is this how typed datasets handles UNION? I didn't want to create two typed datatables and create separate SQL for each and create a relation.
Query Dataset Column For Only Rows With Text?
Sep 19, 2009I have a dataset column that I am keeping comments in. If the row has no comment in it(defualt string value is "", not NULL), I don't want it to show up on my report. How can I fill only the datarows that have text in them and not the ones that are empty. I've tried to filter the columns results by Not Nothing, but everything shows up. I'm guessing because it's actually not NULL since the string is "". How can I filter these results correctly?
View 2 RepliesVS 2005 DataSet.Table.Select Query?
Dec 16, 2010I have created a DataSet.Within the dataset I have 2 DataTables.I have created a DataSet.Relations between the two tables.Now, using DataSet.DataTables.Select.... Would it be possible to perform a search similar to this in SQL?
SELECT * FROM DataTable1
INNER JOIN DataTable2
ON DataTable1.KeyColumn= DataTable2.KeyColumn
[code].....
Change The Query That Grabs The Data From The Dataset At Runtime?
May 20, 2011I'm wondering if its possible to change the query that grabs the data from the dataset at runtime, in order to produce a report based on different criteria.My project doesnt use dataset, and I've had to make one purely for the reports I'm currently using the mySQL .net connector calling everything via code, as well as the query I want to make at the time.Also, I don't want the report to be embedded in the application but be a seperate file as the report may change frequently (the layout of it)I've tried setting the build action as none, but I just get an error in the intermediate window.
View 1 RepliesCheck For Errors When Running DataAdapter / DataSet SQL Query?
Jul 8, 2010This is how I update a table using DataAdapter and DataSet in VB using SQL Server[code]...
I know that the Fill method does not make sense in case of an INSERT statement, but I am new to this technology and the above statement does the job and updates the table w/o problems. My question is this: If there was an error (say a duplicate key error) how would I know this in my application? Should I be putting the above code in a try/catch block?
Also, if there is a "proper" method for running INSERT statements using a DataAdapter/DataSet combination that does not use the Fill method, please indicate that as well.
Create DataSet And Configure Query Builder Filter
Jan 18, 2010I create a dataset and configure the query builder and in the filter i key in this "?" and when I search the name by enter the full name it will show but what I want is just type "A" and it will show the whole name starting with A. I stuck in this problem what the code to do in order to type just 1 letter and show the whole name starting with first letter that I want.
View 9 RepliesEquivalent To JOIN Query With Dataset Multiple Tables?
Dec 21, 2011How to Query multiple tables in a dataset to form single consolidated table without using any external database. I know this can be done using 'JOIN' in SQl.
Now my condition is I have multiple tables filled with data in a dataset and each table is interrelated with a common 'column'. For example ,
Table 1
ID
Name
1
[Code].....
Here I mentioned only two tables but in my case there are many tables. I need a generic answer for this dynamic query .
