DataRow Not Updating After SQLDataAdapter Execute UpdateCommand
Jan 6, 2012
I am trying to check for concurrency when updating a record in the database. Here is my current VB.NET code and Stored Procedure code to do the update.
When a user changes a Status column value the DataGridView CellValidating event is fired and in that event it try's to update the record in the database using the stored procedure. The update works, but my SqlDataAdapter doesn't update dtmUpdateDatetime in dtResults. My UpdateDatabase function uses dtmUpdateDatetime to check for concurrency.
Public Class frmCalculatedResults
Private dtCriteria As New DataTable
Private bs As New BindingSource
I'm trying to save the edits I'm doing to a dataset by using the tableadapter.update command and get this error when I attempt to do so:
Update requires a valid UpdateCommand when passed DataRow collection with modified rows.Whats the correct syntax for doing this? I have this as the update command in my
Private Sub SaveExceptionButton(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles saveexceptionsButton.Click Try Me.Validate() Me.Scratchpad3BindingSource.EndEdit()
I have looked at multiple posts regarding this issue, but can't seem to find a solution. To keep it simple I have an Access database with a single table. It does have a field as a primary key. When I click the save icon on the Binding Navigator I get this error having to do with the following code:
I cannot set the Refresh the Data Table check box in Advanced Options of the TableAdapter Configuration Wizard as it is grayed out. Once again, I have a primary key.
The posts I have reviewed indicate that an UpdateCommand needs to be created, but I can't understand how it should be done. W
I'm trying to figure out why my adapter is not updating my SQL database table. I have a form with 3 data grid views on it. If the user changes the display index, width, or visible properties of the columns I want to save their settings. For some reason the adapters update runs without error, but when I check the database table nothing is updated, why? Does it have something to do with the TableMappings?
when the program is already save the data and when the process is on updating the dataset it give me error say's"Update requires a valid UpdateCommand when passed DataRow collection with modified rows."The error occur at the line in bold letter in the codes below..
Dim classgroup As String classgroup = "" If Me.ClassComboBox.Text = "Key Project" Then
I have two datatables with similar structures that I want to make one existing row to be updated from another datatable.
For example, "tableA" has three columns: "one", "two", and "three"; with "one" being the primary key...
and "tableB" has three columns as well: "one", "two", and "three"; with "one" being the primary key.
Say there is a row on tableA that is different than a row on tableB (with a matching primary key). What I wanted to do, as efficiently as possible, is to take the that row from tableB and replace the one on tableA so it'll be modified.
I'm not sure if there's an easier way of doing that instead of using loops for setting the row's items.
I have an issue with a data base updating it won't update for me in debgging mode it is stopping here on this bit of code which is highlighted in red. the error which comes up is .(update requires a valid update command when passed datarow collection with modified rows.)
Public Sub UpdateDataSource(ByVal ChangedRows As database.dataset1) Try 'The data source only needs to be updated if there are changes pending. If (Not (ChangedRows) Is Nothing) Then
I am completly flummoxed!!! I have writen code for updating my table from a form but when I use the same code only changing the table names it wont work I get the following message: "Update requires a valid Update Command when passed DataRow collection with modified rows" My codes are as follows:
[code]....First of all, when using "Using", is the Open() method required? Some I've seen with, some without. Pretty sure it worked in both cases. Also, I've seen some that end with the Close() method before the End Using.Is that necessary? Basically, when is Open() needed, when is Close() needed, and why is Using/End Using needed at all?
**EDIT: For some reason the "Insert Code Block" isn't working properly at colouring the code.
I've done an internet search to determine if I can detail if a SQLDataAdapter is empty after running an SQLCommand? My research so far point I can't check if the SQL dataAdapter is empty until I bind it to a dataset/datatable. Ideally would not like to run another SQL command to do a row count to determine if query retruns rows or not. I'm populating a datagridview and would like to alert the user that there is no data to view. What's the most efficent way to check if an SQLDataAdapter is empty?
I'm not even sure what I'm asking is even possible, but here goes:
Is there a way to loop through a sqlDataAdapter to find multiple tables?
Currently I have a module that you pass in an object and it automatically fills the parameters of a stored procedure with the values of the object. It works great, except when the stored procedure returns more than one table, it only returns the first one.
Here is what I tried to get to that second table:
Dim ds As New DataSet Dim table As New DataTable Dim reader As SqlDataReader = command.ExecuteReader
I have the followin problem. Opening a table using SqlDataAdapter, numeric columns(sqlDbType = int16, 32, 64) that allow Null value, are set in my dataRows to 0.I am using Visual Studio 2010 and Sql Server 2008.Here's my code:
Dim cmd As New SqlCommand Dim ds As New DataSet Dim dt As DataTable
At the following cmd.ExecuteNonQuery() line, I get the following error message: [code] I have followed the example at page [code] as closely as possible, but it does not work.Additionally, I am not sure of the syntax for the length (64) that I have for the BigInt or if it should even have a length.All of the examples that I have found in MSDN uses only parameters with character rather than numberic type. [code]
I am fairly inexperienced with using datatables in VB. My question is this: Can I access a particular column of a table by name if it is not defined elsewhere like when I populate a datatable using sqldataadapter.
[Code]...
Is this the way it can be done? I believe this is the case, but can't find any definitive examples online (probably not searching properly)
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
I have an empty table loaded to the datagridview. I add a new row to the table by
[Code]...
This code works fine, if i add a new row to the table in which some rows already exists. (Works only when after inputing data to the new row I select any another row). But when I use this code for the first row in a table, it creates a new empty record in the database. The data I have inputed into the datagirfview fields aren`t saved.
I am having trouble inserting data to a DB using a dataadapter. Here is the code: Dim daDevices As New SqlDataAdapter(sql, MyConnObj) Dim dsDevices As New DataSet("WORKSHOP") daDevices.FillSchema(dsDevices, SchemaType.Source, "Replacements") daDevices.Fill(dsDevices, "Replacements") Dim tblDevcies As DataTable [Code] .....
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.
I recently discover that running something like : Dim Da = New SqlClient.SqlDataAdapter( "TRUNCATE TABLE MyTable", connection) will create an empty SqlDateAdapter but it still execute the command. I want to prevent this kind of use ( drop, update, or even systable use,...) and allow my SqlDateAdapter to execute SELECT command only. I can't use a storing procedure because the command must be editable by the website users. After some research i found this :
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.
I am porting VB.Net 2 code (VS 2005) to VB.Net 4 (VS 2010). So far things have been going relatively smooth. However, in testing my new ported code, I came across a strange behavior. In VS 2005 (.Net 2), I have a DataTable filled with data. I then use a DataAdapter to send updates back to the SQL Server. When I perform the qlClient.SqlDataAdapter.Update() command, it execute in roughly 4 seconds. The same code,on the same table in VS 2010 (.Net 4) runs in 1 Minute 17 Seconds. This is completely unacceptable. However, I have no clue as to why it is happening. The .Update() method is an internal command, not one that I modified in any way. It does not error out, it's just painfully slow.
I am using vb2008 express edition and SQL Server 2000What I am trying to do is programmically populate a dataset with records from a database and then bind the fields to textbox controls so that and changes will be updated in the dataset and eventually the database.I have managed to get as far as displaying the data in a form, but cannot understand how to update the database when a button is clicked.
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.
I 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
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?
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?
My users are getting this error when trying to update the database:
"Concurrency violation: UpdateCommand affected 0 of the expected 1 records"
All the users are doing is clicking a button which updates a record.No two users are updating the same record or even within the same column. They could be updating within the same row but still not the same record.It seems to be happening when the program is open for a little while and they come back and try to update the database through the program. I have read a little bit about this error but none seem to lead to a clear solution.It seems like the database connection is timing out due to inactivity?Here is my update command:
vb.net
Private Sub btnComplete_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnComplete.Click Me.txtComplete.Text = Date.Today[code].....
When I close the form I get the message "Dynamic SQL generation for the UpdateCommand is not supported against a SelectCommand that does not return any key column information."at line obj_oledb_da.Update(dataSet).
