Sql Server - ExecuteScalar And SqlDataAdapter.Fill Behave Different For Same Query?
Jul 8, 2011
I have a big stored procedure that I run. At the end its supposed to select a singe value to say if it succeeded or not, so I run the query as
Dim Command As New SqlCommand(SqlString, Conn)
Return Command.ExecuteScalar()
Which works. However there is an error in my stored procedure. I know its causing an error because the logic in the stored procedure rolls back the transactions, and after the Execute Scalar call, my transaction count is down to 0 and the my data hasn't changed. However no SQL exception was generated.
The strange part is, I changed the code to grab all the result sets from the SP to see if I could get more information. So I called the same SP like this,
Dim DAObj As SqlDataAdapter = New SqlDataAdapter
Dim CommandObj As SqlCommand = New SqlCommand(SQLString, Conn)
DAObj.SelectCommand = CommandObj
Dim DS As New DataSet()
DAObj.Fill(DS)
When I run this, with the exact same sql as before, executing the exact same stored procedure, this time I get an SQL exception because one of my nested SP calls was missing required parameters. So what could cause this? Why would running it one way produce an error and the other way have the error but not report it? Is the difference on purpose, or some kind of obscure bug in ADO.Net?
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Jan 19, 2010
I fill a dataset using fill() method of sqldataadapter. The select query call a user defined function in it. My problem is that when I run this query in sqlDataAdapter , the fill() method take about 70 Sec. to give output but if I run the same query in Enterprise Manager or in Query Analyzer it gives output within a 1 or 2 Sec.
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Jan 21, 2009
I use SqlDataAdapter.Fill to retrieve data from a SQL2000 Server, and the datatable is updatable.
Recently, we plan to upgrade to SQL2005, during testing we found that the same statement will return a datatable, which is readonly We need to change the column's readonly property in order to update it.
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Mar 9, 2011
I'm still in my novice stages of .net development, and I think I may be trying to make something too complicated.In VB.Net 2008, I'm using a SQLDataAdapter to Fill a dataset with records being returned from a Stored Procedure (SQL Server 2005).I'm using that dataset as the datasource for a gridview. Up to this point, everything is great and I understand what's happening.I'm getting ready to make my first-ever attempt at updating the data in thegridview and then pushing the updates back to the SQL dB.Here's where I'mgettingconfused...to cut to the chase, what's the simplest way to load the updates back into SQLServer?
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Feb 21, 2009
I'm moving over date.oledb commands to SQL ones and wondering what the equivalent to executenonquery here is? This is what I have at the moment and I can bind select queries to datagrids no problem how would I get the DBCommand to execute the query?
Dim DBConn As SqlConnection
Dim DBCommand As SqlDataAdapter
Dim DSPageData As New DataSet
[code].....
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May 17, 2012
Here's my query[code]...
how to get it from the array to the checkedlistbox.
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Apr 28, 2010
I am having a problem with filling a combobox with unique values.Im not very good at vb either so I will explain what I have done so far.
1. I added a combobox to my form called Combobox1
2. I clicked the little triangle widget thing on the ComboBox1 set the dataset to MyDATASETDataSet1
3. Display Member: CurrencyCountry, Value Member: FCode, Selected Value = None
4. I fill MyDATASETDataSet1 when the form loads using:
PricesTableAdapter.ComboBoxQuery(CurrencY_DATABASEDataSet1.Prices)
ComboBoxQuery =
SELECT DISTINCT [CurrencyCountry], [FCode] FROM [Prices]
The form does not load, i get the error: Failed to enable constraints. One or more rows contain values violating non-null, unique, or foreign-key constraints.If I replace ComboQuery with Fill Query (which is the default fill command) it displays results....but not unique results, i see the same items being repeated throughout the list in the combobox.I guess my questions are:
1. when you fill a dataset do you need to select all the fields when you are creating your query?
2. if i simply wanted to perform the following lookup:
SELECT DISTINCT [CurrencyCountry], [FCode] FROM [Prices]and set the combobox Display Member: CurrencyCountry, Value Member: FCode how would I do this in the code?
3. how can i change my query to display only unique values, distinct doesnt seem to be working?
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Dec 11, 2011
I'm trying to fill combobox with my SQL query result.[code]...
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Jan 24, 2009
[code] i use this line to fill the datagrid Me.tableTableAdapter.Fill(Me.DDataSet.table)how can i fill the datagrid with a custom query?
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Apr 26, 2010
I've got a button that sends an sql query to the database it works but i don't know how to fill the datagrid with the results of that query
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May 6, 2011
i want to fill my datagridview column with sql query and data i have 1 datagridview in datagridview 4 column
column1 column2 column 3 column4
this gridview is undound
i want to fill with sql data
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Dec 12, 2011
my query is too long and retrive larg data.
and myform hanged when query is process.
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Apr 22, 2011
I am trying to use a DataViewGrid to show certain transactions.I also have a TextBox for the user to enter the transaction ID to fill the DataViewGrid.In the Query Builder it works if I give the NABTransID in the Query but I want it to read the TextBox1.text to find the transactions.
[code]...
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Sep 7, 2009
I have a field called "payor" where the user selectes either "All, Medicare, Managed care" from a drop down list. I am sending the value of payor to the Fill query once the user selects the one they want.
I have no problem with coding 'Where (payor = @payor) if the user doesn't pick ALL, but what code do I need to include ALL records if the user selects "ALL" in the where statement?
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Dec 17, 2009
VB.Net 2005 SQL server 2005
I have a project I have a dataset that contains tables In the dataset designer, each table has a defaiult FILL command set. I have draged and droped my table as a grid onto my form VB automatically sets up the table adapter, and binding source to make it all work.
in my code, is placed in the form load routine, a tableadapter.fill(dataset.datatable)
Here is my dilemma. The data in my table may have 100's of thousands or rows.
I have presented the user with a front end that allows for filterring and selecting based on several columns. reguardless of how many rows the result set contains, there will always be the same columns in the dataset.
Because there are so many combinations of select query, i do not want to make 20 or 30 custom fillby's in the dataset. I want to make an addhoc select query and have the binding source and table adapters work as expected. I have created a query called "FillByCustom" in the dataset designer attached to the DataTable Adapter section.
My question is this.
If i build a select query that returns the desired rows, how do i place it into the adapter in place of the FILLBYCUSTOM select command, such that it all works as expected?
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Apr 10, 2010
I have a database with around 100 columns and when i go:
[Code]...
The code works fine with a smaller database, so i was just wondering the problem is that the database is too big and the adapter isn't able to handle such a long query. I was just wondering if anyone knows what kind of limits there are?
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Jun 2, 2009
I have the following query that executes when my form loads. It's the rowsource for my combo box. The query is fine and populates the combo perfect, however, when i click into the combo box I cannot click out of it or even close the form. I have tried taking out the line of code that fills the form via table adapter on load and it works fine (opening the form unbound by the main table). Has anyone run into this before? I have another combo box on the form setup the exact same way and this is not happening. I've experimented with different datatypes etc....
code to populate combo box:
Public Shared Function LoadCallSource() As String
Dim sConnectionString As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:Documents and Settingsdiw07My DocumentsDaily Backupsphone memo backend.mdb"
[code]....
If I take out the line
Me.MemoTableAdapter.Fill(Me.Table_Memo.Tables("Memo"), intMemoID)
The Combo boxes do not act up or "Lock"
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Mar 1, 2012
I created a new query in the dataset designer. There are now 2 queries there. The original one and the new one.I also added named parameters in the Where clause of the 2nd query.This is the query in the new one:
SELECT ID, FatherName, MotherName, EmergencyContactName,
EmergencyContactRelationship, Address1, Address2, City, State, Zip,
PrimaryPhone, SecondaryPhone, Emaile.
[code].....
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Jun 5, 2011
I'm trying to create a Server/Client Sync scenario for my application using Sync Services for ADO.NET specifically the LocalCache custom tool which sets the whole thing up for me.My server DB has 5 Tables, all of which are being synchronized to the client application, which now has a SQL Server Compact DB with the same schema as the server DB. I have a dataset with some custom queries that I use to connect my app with the local database.So far so good.However in my application when I try to fill one of my tables with the table adapter on my form (the default "fill" method) it gives me the following exception:No mapping exists from DbType Object to a known SqlDbType.
However, if I continue and do the fill again, IT WORKS without a problem.
Try
Me.WTSUsersTableAdapter.Fill(Me.WTSMainDataSet.WTSUsers)
[code]......
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Mar 21, 2012
i need to get users domain from any server and fill my combobox.[code]
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Apr 26, 2010
In VB 2008, I use a combobox on a form, and I want to fill it with data coming from a column of an SQL Server table
The Table is PLG_Rank, Columns are "ID_Rank, Rank_Name, Rank_Code"
I want to fill the combo with PLG_Rank.Rank_Name
After that, on a selection in the combobox, I want to use the PLG_Rang.ID_Rank for a request on the SQL_Server
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May 27, 2009
how to fill List View and Data Grid from a Database (SQL Server).
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Nov 30, 2011
I am working on a login page for an asp.net application. I'm making my own login and everything is working so far: I get a connection, the query is asking to return Count from the table where the username and password match the username password in the table.
[Code]...
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Nov 28, 2011
It worked fine till i applicated some conditions... Now my form execution stop right after a ExecuteScalar.[code]
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Jun 1, 2011
I have a Stored Procedure which returns 10 columns of data. Using cmd.ExecuteScalar() returns the value of the 1st column from the 1st record. How can I change this so that I can return different columns, by specifying their alias/dataitem name?
I want to be able to do something like: Dim FirstName as String = cmd.ExecuteScalar("FirstName")
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Mar 15, 2012
show me how to do an insert with EF4 VB and also how to return the ID of the inserted row?This is what I have got for edit and it works.. I have seen some very confusing ways of doing selects and edits and have found that i'm most comfortable keeping it written nice like this so that I can go back and understand what I have done.
[Code]...
I want to insert a new order with an order_id and value for ExportedToOW and get the order_id back which is auto generated by the DB..
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Nov 3, 2011
Why i got this error ?? ExecuteScalar: Connection property has not been initialized
the red section got error.
my code
Dim sql As String
Dim sql1 As String
Dim sql2 As String
[Code].....
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Apr 17, 2009
i tried this sqlcommand select max(food) from foods and i tried this dim x as double=cdbl(cmd.executescalar)and it throws the the exception {System.Invalid CastException}because the food table is empty and the max(food) is null how can i fix that because i want to take the value and add one to it so do i need to catch the error or try another conversion option?
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Feb 22, 2009
I've got this
Public Function VendorIdOf(ByVal SimpleId As String) As String
Dim result As String = Nothing
Using drc As New SqlCommand("Select VendorId From Vendor_T Where SimpleId = @SimpleId", _connection)
[Code]....
"Object reference not set to an instance of an object."
Why is that? I would expect a null value to be returned if the row does not exist.
Also - out of curiosity - how come this can be written two ways?
result = drc.ExecuteScalar().ToString()
or
result = drc.ExecuteScalar.ToString
What's up with those paren's?
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Mar 4, 2010
I am converting projects from C# to Visual Basic, and the namespaces in VB.NET behave in a weird way. There is some kind of hidden default namespace, and it's annoying. I want it to behave identical to C#, which works as expected - things go into the namespaces you create for them.
I've been getting around it usually with say
using MyClassLibrary;in C#, and in VB
Imports MyClassLibrary
Imports MyClassLibrary.MyClassLibrary
but it would be nice to have the functionality the same, and also logical.The other bigger problem is, I have a .tt file, and the C# project generates the code in a different namespace to the VB one.
Is there some solution to make both behave identically with regards to namespaces?
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