Use Backgroundworker For Generate Query And Fill Datagirdview?
Dec 12, 2011my query is too long and retrive larg data.
and myform hanged when query is process.
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Fill Bound DataSet In Backgroundworker?
Jul 10, 2010I've added a Data Source to my project and a table from that Database (SQL 2005)
It is a rather large table and takes a LONG time to load the form. I was thinking of loading the auto-generated "Fill" statement in a Backgroundworker, but it doesn't seem to be doing anything. I have the Fill statement in the DoWork event, but it never "finishes" it seems. My BindingNavigator stays at 0.
I looked at jmc's sig link and everywhere I look, it seems like I'm going to have to iterate one at a time, but how can I do this for a bound datasource?
Fill Datagridview Using Backgroundworker & Progressbar?
Aug 23, 2010how to load data into datagridview using backgroundworker & progressbar?Let's say i have a report that shows some statistics, or has 100 000 of rows that should be displayed and during the load i would like to show the data that is already loaded and not to frees the form.Same example like in SQL when you perform a select command from a table which has 100 000 of rows and while loading the data, the grid is already filled up and progressbar is shown at the left buttom side.
View 7 RepliesUse Backgroundworker In A Class And Generate Events For Client Application?
Sep 14, 2009I have designed a class for posting data to server, which is a time consuming task so that i have used background worker in my application. instead of repeatedly using backgroundworker in my application, i decided to add it to my class and generate two events PostWorkerReportProgress, PostWorkerComplted for my application
View 1 RepliesVS 2008 Run A Query In A BackGroundWorker?
Mar 19, 2009I am trying to run a database query in a BGW to fill a DataGridView with the data that is returned by the query. The code I came up with works in that it executes the query & fills the DGV but it totally freezes the form & all controls on the form. Successive clicking on the form or any controls causes "Not Responding" to show in the title bar & I have to terminate the program from the IDE. If I run the query in a regular subroutine it works fine. Can somebody please review my code to see where I might be going astray? I've never used a BGW before so maybe I'm doing it all wrong.
[Code]...
Have A LINQ Query Execute In A BackgroundWorker?
Jan 22, 2010I would like to run a query in background (using a BackgroundWorker) in this way[code]...
...but, because of deferred execution, the actual getting of the data does not happen in the "BackgroundWorker" thread, but in the "RunWorkerCompleted" Sub, making the BackgroundWorker itself useless.Is there a right way to do this without looping through the "MyQuery" to get the results and copying them to another object to pass it to the BindingSource?
Fill A Checkedlistbox With Linq To Sql Query?
May 17, 2012Here's my query[code]...
how to get it from the array to the checkedlistbox.
Fill Combobox With Database Query?
Apr 28, 2010I 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?
Fill ComboBox With Query Result?
Dec 11, 2011I'm trying to fill combobox with my SQL query result.[code]...
View 2 RepliesHow To Fill Datagrid With A Custom Query
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?
View 4 RepliesHow To Fill Datagrid With Results Of Query
Apr 26, 2010I'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
View 1 RepliesFill Datagridview Column With Sql Query And Data?
May 6, 2011i 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
Using TextBox To Fill A DataViewGrid In Query Builder?
Apr 22, 2011I 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]...
Sending The Value Of Payor To The Fill Query Once The User Selects?
Sep 7, 2009I 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?
Specify A Custom Select Query For A Datatable Fill Method?
Dec 17, 2009VB.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?
Sql Server - ExecuteScalar And SqlDataAdapter.Fill Behave Different For Same Query?
Jul 8, 2011I 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?
VS 2008 Does Adapter.fill Have A Query Length Restriction
Apr 10, 2010I 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?
How To Print A DataGirdView In VB 2010
Nov 9, 2011I want to print a DataGirdView,
View 2 RepliesSave DatagirdView To A Textfile Row By Row?
Nov 11, 2011I need to write data that is contained in a datagridview to a text file row by row.I can't get this to work.
Dim row1 As String
Dim cell1 As String
Dim cell2 As String
Dim cell3 As String
[code]....
Use Datagirdview In Tabular Form?
Feb 26, 2010i want to use datagirdview in tabular form
example:
Left Right
Normal Yes No
BGDR No Yes
Table Adapter FIll Causing Error With Combo Box (Query)?
Jun 2, 2009I 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"
Datagirdview Clearing Rows On New Recordset
Jan 2, 2009In my vb 2005, form one combobox and a datagrid view datagridview filled via dataset and sqldataadapter - declared class objects when an item in the combobox selected, some subitems corresponding to the combobox selecteditem is displayed in the gridview.ie., when a new item selected clear the grid and fill the grid from the new record set.[code]
View 1 RepliesSave Data From DatagirdView To Another DataGridView?
Feb 16, 2011I have two datagridview1 and DataGridview2 and have same field like productCode,ProductDescripiton,Price,Qty and ItemTotal. Now I want to transfer data from datagridview1 to datagridview2. I want that when i click Save button the DGV1 field save to DGV2
View 3 RepliesSelecting A Particular Query In The Dataset Designer To Be Used In The Fill Method Of The Table Adapter?
Mar 1, 2012I 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].....
Computing And Saving Column Rows On A Datagirdview
Jul 7, 2010trying to understand DataGridView. I can sum columns with no problems and place the result in a textbox. My problem is multipling two column rows and saving it. I receive the following error when I go to save it. "Column mapping from source column failed because the data column is a computed column. So can I compute two column row to a third and save it, if so how. My code is below:
I save.[code....]
Cancel Backgroundworker - Got The Error Message" This BackgroundWorker Is Currently Busy And Cannot Run Multiple Tasks Concurrently?
Dec 14, 2009in my button click event i ececure
If BackgroundWorker4.IsBusy Then
BackgroundWorker1.CancelAsync()
End If[code]....
after proceess completed if press the button again.i got the following error msg
This BackgroundWorker is currently busy and cannot run multiple tasks concurrently.
Autocode Generate - First Query Finding Max Of A And Second String Take String A
Mar 15, 2010Private Sub txtname_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles txtname.TextChanged
myConnection.Open()
[CODE]...
I want to four digit code like Abneesh than first query finding max of A and second string take string A than code generate like A001----------A999
Backgroundworker Inside Another Backgroundworker?
Apr 2, 2012i'm in the need to start a backgroundworker inside another one.Now...The first one BGW starts a for cycle, and inside this one there is the second BGW that has to upload an image to a server.The trouble is that, the progress event and the complete event of the internal BGW are never called.
View 11 RepliesFill Datagridview Or Fill Listbox?
Sep 23, 2009I just want to display data of a single column from an oracle table into a datagridview or a listbox for readonly with no requirements to make changes to it. Simply display the information.What is the best way forward... To used DATAADAPTER or DATAREADER.s DATAGRIDVIEW SLOWER TO FILL THAN a LISTBOX.i am using the following code to fill datatgridview but for some odd reasons at time it is slow to display the data. I want to use listbox instead
Dim ds As New DataSet
Dim adp As OracleDataAdapter
adp = New OracleDataAdapter("select customer_name from customers")
[code].....
Sql - When Run The Query In Query Analyzer, It Returns One Row But When Use The Same Query, No Rows Are Returned?
Aug 19, 2010Here is the code:
Function getData(ByVal id As String)
Dim reader As SqlClient.SqlDataReader
Dim statement As String
[code].....