Difference Between A DataAdapter And DataSet?
Apr 16, 2011Can you explain to me what they a
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Difference Between Insert Query And Dataadapter.update
Mar 3, 2011Is there any difference in the
1) If I insert a row into a sql table using insert query and
2) If I fill a datatable in dataset and add a row to it and again use the dataadapter.Update method for inserting this row.
Access 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 A Connection, Dataadapter, Dataset Etc Be Public, Ie Available To The Whole Program
Dec 6, 2011I have an application with a number of forms that basically access the same data (or subsets of it)Can the data adapter, connection object etc be opened in a module so that all the forms have access to them to avoid writing the same code in each form?I had a go at doing this but they seemed not visible to the form?
View 8 RepliesDataadapter, Update, Updatecommand Dataset Stuff?
Jan 25, 2007I'm having trouble updating a sql server database with a dataset using a dataadapter. I have used the dataadapter with success in the past when adding new rows, using a single table, and just calling the dataadapter.update command.However, I am now running into a more complex scenario and I need to use dataadapter.UpdateCommand method and I'm having lots of problems.
The sql statement that I'm using to fill the dataset looks like this: "Select [Order Details].ProductID, [Order Details].UnitPrice, [Order Details].Quantity, [Order Details].Discount, Products.ProductName From [Order Details] INNER JOIN Products ON [Order Details].ProductID = Products.ProductID Where OrderID='" & strOrderID & "'", sqlConn"
This is pulling the data from 2 different tables (Order Details and Products) and then joining them and filling the dataset, and I am seeing the exact results I want. I am then binding the dataset to a datagrid control that allows the user the option to edit the datagrid, which in turn updates the dataset.
So that being said how do I get the updated dataset back into the database? I tried using dataadapter.update but it informed me that I now need to use dataadapter.UpdateCommand. Ok, so I've looked up how to use UpdateCommand but I cannot for the life of me figure out how to set up the right sql command statement. Part of what has me confused is the UpdateCommand examples I have seen are working with a specific row and updating that rows data. I can get that to work but I want all changes to the dataset to persist and update to the database when the user is done working on the datagrid.
Also, the examples shown set up command parameters but again, this is only confusing me because I just want to send the whole dataset back to the database. It seems like the parameters are saying "Ok, this specific row in this specific dataset.table, update these specific fields in this specific database". I'm not sure how to accomplish that when working with a datagrid.
VS 2005 Fill DataAdapter To Dataset Is To Slowly?
Jul 21, 2009i try to use this yesterday it work fine..now, it will process too slow.. when fill the dataadapter into the dataset..here is the code it gives 20 menutes still no result.. "no error, no comment. it's like standby
Dim conn1 As MySqlConnection = New MySqlConnection("server=pc1;user id=user;Password=12345;persist security info=True;database=mytsmobile")
conn1.Open()
[code]....
Check 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.
Insert, Edt, Delete And Search Access Database Using DataSet/DataTable/DataAdapter In Code Through Datagridview
Mar 23, 20101. Can someone show me sample codes on how to do that ?
2. I encountered a problem with the INSERT sql statement. I keep receiving syntax error in insert statement exception. Is there anything wrong with the statement ?
[code]...
VS 2008 Difference Between A DataTable And A DataSet
Nov 18, 2009I've been using VB for some time now, but I must admit I am a little confused. I started learning with 2002, then 2003, 2005 and now 2008. I think database coding must have been going through a kind of transition when I was trying to teach myself the basics. As a result, I am not entirely clear on a few things..
1) What's the difference between a DataTable and a DataSet. Why would I use one over the other?
2) Personally I dislike using DataAdapters etc and much prefer typing my connections in code so I can see what's what. When using the visual tools things are 'hidden' from view and it's not clear what's going on - do others find the same or is this just me being old fashioned?
3) Using my code-based approach (ie: creating SQL connection, using ExecuteNonQuery and a SQLDataReader to read the results into my application) - is this less efficient than the alternative methods?
4) Finally...LINQ. Is it any better and should I be using it as standard practice?
Add New Row To DataGridView Without Using DataAdapter?
Jan 19, 2009Code to add a new row to my datagrid on click of add button. I am not binding my grid to a datasource.I m fetching values from the database through a datatable n then through a lood inserting t values to my datagrid. i m not binding the entire datatable as my datasource for the grid.
View 2 RepliesDataAdapter UpdateCommand?
Mar 6, 2009I have 2 datagrids. One to show Product information and another for Product purchase details entry.Both share the same dataset. The dataset (ds) is filled up with columns from 2 table
ProductMstrTbl : ProductID, ProductName..
ProductDetailsTbl: ProductID, PurchaseDate, Amt, BalanceQty..
[code].....
Using Transaction Then SQL DataAdapter
Jun 12, 2011I'm having a hard time on using Transaction then after that I need to use sqldataadapter. When I tried the code below I'm having an error "ExecuteReader requires the command to have a transaction when the connection assigned to the command is in a pending local transaction. The Transaction property of the command has not been initialized." Pointing to this block.[code...]
View 1 Replies.net - How To Alias In Dataadapter Query
Aug 21, 2011I am using a sql server database and i am storing the time value in the datetime variable. I am developing a booking system application in vb.net. When I want to view already made bookings using datagridview and by implementing dataadapter and dataset...When the table is shown in the datagridview I want custom column names to be shown so tell me that how can i use alias in the query given in datadapter initialization part?
View 1 RepliesAdd Another New Dataadapter In Previous Data-set
Mar 17, 2009im added a dataset inside my project, and inside the dataset i added a DataAdapter with the steps like below:Use SQLStatement --> select A,B from tb_example --> Fill a datatable.And then i bind one of my combobox datasource's display member = Avalue member = BAnd its work properly!After few weeks, im reopen the project and i try to add another new dataadapter in the previous dataset and a new combobox like steps i did before. When i come to the combobox and try to find the datasource in combobox's properties and i cant find the dataadapter i jz added.
View 7 RepliesAsp.net - Add Parameter To DataAdapter.fill()
Jul 20, 2011I am trying to add a parameter to a sqlDataAdapter. I have tried to use parameters.add() but the adapter is not a sqlCommand. Here is some of my code.
Private Sub convertToCSV(ByVal SqlQuery As String)
Dim Dt As New DataTable()
Dim SqlCon As New SqlConnection("Data Source=db;Initial Catalog=productionservicereminder;User Id=id;Password=pass;")
[Code]....
Basically I am trying to do something like this:
Ada.Parameters.Add(New SqlParameter("@pgid", pgid))
Asp.net - Sort DataAdapter Alphabetically ?
Nov 30, 2010This should be a fairly simple one. I am creating a dataset which will contain a description field which I would like to sort by. The reason I want to sort the dataadapter and not in my SQL is that I am already ordering by the results that have a particular value.My SQL looks like this:
SELECT pif_desc, pif_fund, psf_end, (CASE WHEN SUM(pmi_units) IS Null THEN 0 ELSE SUM(pmi_units) END) As fundunits
FROM tbl_mem INNER JOIN tbl_sfunds[code]....
I want to sort the datarows is ds.tables(0) by pif_desc but still have the rows with fundunits > 0 listed first. how I can achieve the correct ordering.
DataAdapter Does Not Update A Record?
Feb 15, 2011I have been researching all that is related to DataSources, DataReaders, DataAdapters, etc, with an Access 2010 DB bound to a DataGridView.
Everything is fine, just one line fails and is driving me nuts Here is the code:
[Code]...
The line that fails, actually updates my database, but somehow, the update is not performed on the line that belongs to the first row of the grid. What is more, if I change the value manually, the same update method works fine. What is going on here?
DataAdapter Not Writing Updates
Sep 29, 2009I'm trying to create a form that uses controls that are bound at runtime. All the data objects are declared at the form level. The Select statement includes the two fields that make up the PK form the table. The Owing_Company data displays in the bound control. I can change the text and in Save_Click the RowState is Modified and Row!Owning_company has the changed data. DsForm.HasChanges is False. A simple call in Save_Click daForm.Update(dsForm) does not change the DB. If I update the Row!Owning_Company in code dsForm.HasChanges is now true and daForm.Update changes the data. What am I missing that allows changes made via the bound control to modify the DataSet?
[Code]....
Execute SQL Command For A Dataadapter?
May 14, 2012Is there a way to execute SQL command for a Dataadapter rather than regular approach.
I i have parameters to pass to the SQLCommand. In he below model DAtaadapter at declaration itself we need to pass the SQL as string, and Conn. But i wan to send SQL Command to the adapter to execute instead command as string
Previously i have used to fill dataadapter as below
dbSource = "Database= DataBase;"
conn.ConnectionString = dbProvider & dbPassword & dbSource
If conn.State = ConnectionState.Open Then
[Code]....
Getting Error During DATAAdapter Update?
Dec 29, 2009I dont know where's my error.To begin with i have two buttons ADD and SAVE.My Datebase Name is COURSE where all its fields are text except courseid (number).when i click SAVE the only error is FAILED to convert parameter value from a string to Int32 exactly during dataadapter.update (ds,course)I am not converting any datatype or value to int32 .
Private Sub BUTTONSAVE_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BUTTONSAVE.Click
MsgBox(" SAVING CHANGES....")
Me.Cursor = Cursors.WaitCursor
[code]....
How To Synonymous Between DataAdapter And DataTable
Jan 14, 2012I wrote a code as:
Dim dTable
As
New DataTable
Dim dAdapter
As SqlClient.SqlDataAdapter
[Code]...
My Problem Is that when i Update Table thought dataadapter but Table didn't get auto-increment ID. When i reload the from then i get all data. how do synonymous dataAdapter and DataTable during when i call dataAdapter.Update methor.
Instert Null Value In DataAdapter?
Jul 16, 2011I have to copy the contents of one row in a table to another row, there is no problem until the source has no image so its value is Null, which is allowed in the SQL Server database.[code]....
View 2 RepliesReasonable Use Of A Dataadapter In A Class?
Jan 17, 2009[code]And the database is being updated.Is this a good use of a class for this really basic purpose?
View 5 RepliesUpdate Not Working With DataAdapter
Dec 6, 2011I need to select some user datagridview settings (such as column width, column visible, etc.) from my database. Then I run a loop to change those settings. If any settings are changed I need to update the database. For some reason I can't get the code below to update anything. The code throws no errors when it executes, but when I check the database for the updates nothing is changed.
Public Sub pubsub_UpdateUserSettings(ByVal FormName As String, ByVal dgv As DataGridView, ByVal MethodID As Integer)
Dim adt As New SqlDataAdapter
Dim cmd As SqlCommand
Dim cmd2 As SqlCommand
Dim dt As New DataTable
[Code] .....
Using DataAdapter To Update MS Access?
Jan 24, 2009I am trying to make a little search system, so the user can enter a search parameter which then populate a DataAdapter, DataSet then DataGridView with the selected data then any change the user makes in the DGV are then commited to the MS Access (97) Database when a Update Button is pressed. This is what i have so far, at the minute it seems to populate the DA, DS and DGV but when i come to press the Update Button I get a pop up box with a long error message:
Private Sub btnSearch_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSearch.Click
connetionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source= " & frmMain.varDP_System
[code].....
VS 02/03 RETURN_VALUE In DataAdapter.InsertCommand
Jul 15, 2009In my form, there is a (design time) dataadapter. This adapter has got Insert, Update, Delete and Select commands. When the InsertCommand is executed, the data in the form are inserted (and saved) to the database.
The InsertCommand has a parameter RETURN_VALUE. The value of the parameter can be read by the follwoing code.
pDataAdapter.InsertCommand.Parameters("RETURN_VALUE").value
I want to assign the above value to another field in the dataset (say, SubscriptionNo) I use the following
pPKValue = pDataAdapter.InsertCommand.Parameters("RETURN_VALUE").value
pDataSet.Tables(pDataSetTable).Rows(0).BeginEdit()
[CODE]...
But, when I assigned the pPKValue, it raises the error, "Column SubscriberNo is Read-Only". How to rectify it? I like to set this as "NON Read-only" temporarily and after updating, again set to read-only.
VS 2008 - InsertCommand With DataAdapter
Mar 12, 2010what is the method to insert a row in a table using Insert-Command and a DataAdapter. I want to insert the row using SQL = "INSERT INTO table (f1, f2) VALUES (@p1, @p2)". [Code]
View 10 RepliesVS 2008 Insert Row Into DataAdapter?
Dec 1, 2010I have this code when my form is loading
PlanningMaterialLoadDA5 = New OleDbDataAdapter("SELECT JobPlanNumber, CompanyMaterialsID, CompanyPartNumber, Quantity, [Order] FROM tblCompanyMaterials WHERE JobPlanNumber=? AND [Order] =?", cn)
[Code]....
Better Way Of Filling A Generic List From A SQL DataAdapter?
Apr 11, 2009I have an existing application that uses Active Record for its data retrieval. It's in VB.NET (first time I'm doing VB.NET; I usually work in C#). And I'm building a method to return a List(Of T) of an object. The current pattern uses a SQLDataAdapter to populate a datatable. I COULD add the record to the List(Of T) as I fill the datatable, but there HAS to be a better way to do this.
View 1 RepliesC# - Where Does Dataadapter Will Find Its Sqlparameters Information From
Mar 29, 2011I have a table, I add a dataadapter to it and it has all the commands. There are lists of paramters for update,insert and delete. I wonder where does the Visual Studio find the related informatio on the size of the parameter? Since I believe it is reading from a wrong place or I did not set someting correctly. While the corresponding NvarChar column in dataset and database table is having the size of 20, in dataadapter it is all 0!
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