I can't seem to get a DataTable filled.url...I'm using VB, Visual Studio 2010.I keep getting an error on this line: adapter.Fill(dt)The Microsoft Jet database engine could not find the object 'Book1.txt'.Make sure the object exists and that you spell its name and the path name correctly.The name of the file and the path should be perfectly fine, although i did change the code just a bit:[code]I read somewhere that you have to 'drag a data adapter object from the Toolbox onto a form or component'.I don't have a DataAdapter in my Toolbox.I did a right-click and selected 'Choose Items.It is nowhere on the .NET Framework Components.
I am trying to add NewRow to the database by using datatable in dataset, but before I do that I want to make sure that row is not already there. I create new row for the datatable I am working with, fill it with information. I fill datatable with the row from database that has the same primary key as my NewRow by using tableadapter.fill method, but when I do that my NewRow that was never added to the datatable is filled with information from database(and not information that I assigned to it). I count rows in my datatable before I fill it and it's 0, so why is my NewRow affected by Fill command? (I am using VB.NET 2005 Framework 2.0)
i want to fill a Datatable with a Datareader row by row but get an exception because the reader's columns have a different order than the Datatable's columns.
Why and how does a Datatable loads itself with a Datareader correctly, even so it has a column collection with different order?
I need to calculate values for every row so i dont want to load the Datatable completely but row for row. It has 25 columns so i dont want to set it all manually.
There must be a chance to load/fill/add a new row from a datareader without having the same column order(reader.GetSchemaTable?).
Following is what i have but what doesnt work:
Using reader As System.Data.SqlClient.SqlDataReader = command.ExecuteReader 'next line works(configInfo.DataSource is a Datatable)but is inappropriate configInfo.DataSource.Load(reader)
I am using a SQL query to fill a datatable from 2 associated tables. The first table has Products and the second has associated addonpackages. When I loop through my Products I am able to get all of the addonpackages for the first product but after that the datatable is only getting populated with the last addonpackage for each product. ie:
product 1 - all 6 packages are added tp the datatable product 2 - only package 6 is added to the datatable product 3 - only package 6 is added to the datatable ...and so on
My query follows. Why I am getting all of the info for the first product but just the last item for all others. No matter which product I would query first, I get all of the associated data with it but only the last for all others.
SELECT Products.ProductNumber, Products.Name, Products.Mnemonic, AddOnPackages.PackageNumber, AddOnPackages.Name AS PackName, AddOnPackages.Mnemonic AS PackMnem FROM AddOnPackages RIGHT OUTER JOIN Products ON AddOnPackages.ProductNumber = Products.ProductNumber WHERE (Products.Name = @ProdName) ORDER BY Products.ProductNumber, AddOnPackages.PackageNumber
I fill a data table with 11 columns and 1 row. Columns/ User Pass Row / **User2054** 1234 I have a Label named lblUser and I want to put the value=User2054 from my Table(Collumn[0], Rows[0]). How I can fill it?
I would like the main form I am designing in VB.net to appear as quickly as possible. As a result I don't want to fill a datatable in the load event but instead fill it as soon as the form appears, in the background.Then when a user clicks the button a listbox can quickly be populated.
With this in mind I called a function to fill the datable from the _Shown event. The trouble is that the form freezes until the query executes, making the process pointless for my needs.
Does anyone know how to keep the form active while the datatable fills silently in the background?
I'm getting a set of data by a datareader and assigning to a string. Now I need to fill the datatable columns with the Query fields. The datatable is connected to a grid to display the filled data. query is : strSQL = "SELECT EmpCode,EmpID,EmpName FROM dbo.Employee" Datatable columns are EmpCode,EmpID,EmpName. I need to read the query and assigned to the columns of datatable and fill the table. Me.DtShifts.Tables("NonAllocated").Clear() Me.DtShifts.Tables("NonAllocated").Load(dr)
I was wondering if there is a way to change the Fill command text of a datatable before issuing it.I need this because the table I am opening has over 15 thousand rows and it hangs for a while in the network when filling the table. So I would like to tell it what to SELECT instead of getting the whole table and then applying a filter.If there's a way of doing that without changing the fill command, it will also work for me.
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)
fill a NEW DataSet's DataTable with data from a DataGridView? I am generating a data report that uses that "new DataSet." I need to go from a DataGridView to a DataSet because i need the person to be able to perhaps edit the information before its inserted into the report. my process to generate the report is...
- fill datagridview with advanced join sql - allow user to edit datagrid if necessary - put datagrids modified information in new dataset - set report's databinding source to new dataset - generate report...
I have a SQL db that holds the records for my page. On my page I have a details view I want to populate with records from my db. I can populate the records just fine, I need to be able to populate in records based on a user selection from a drop box?To clarify, on my main page I have a drop down list with years (ie. 2011, 2010, 2009), and a drop down containing account codes (ie. six-digit numbers). Based on what the user chooses for the year (for example 2010) and the what they choose for the account code (for example 123456) I want to populate the details view (which is on a seperate page) with only those records from 2010 and with the account code 123456??
this is more a theoretical question i asked myself.I remembered that BinarySearch of an ordered List(Collection in general) is faster than finding Rows with Datatable.Rows.Find or DataTable.FindByPK with a primary key value.Hence i fill a Datatable from Database in a shared constructor and immediately after that a List(of Int32) that contains all primary keys from that table. Later i will check with BinarySearch if the List contains primary-key values. But because the datatable contains only the PK-Column anyway, i asked myself if there is a way to avoid the huge overhead of filling a Datatable and after that adding all Rows to a List. Is it possible to fill a generic List(or other collection-type) instead of a Datatable/Dataset directly from a Dataadapter?Maybe i'm off the track and there is another way to avoid the Extra-Loop that i'm missing.
The code of filling the DataTable in a strong typed Dataset and the List: Private Shared w205CorrectSWUpgrades As New List(Of Int32) Shared Sub New()
The following code loops through the rows of a datatable to process each record which has a Processed column value not equal to -1. When a record is processed, its Processed value is updated to -1. As a record is processed, the code within the Do Loop may add a new record to the datatable with a Processed column value equl to 0. All of that works as intended. My test set record gets processed and a new record is added.At the end of the For.Next code, there is a line , "clsWTAdapter.Fill(clsWTDataTable)", which I intended to refresh the rows so that it would include the newly added record which would then be processed during the next iteration of the For...Next sequence. This is not happening. What am I doing wrong, and how can I refresh the rows and process the newly added records?
I found this line in an MSDN page about DbDataAdapter Fill Method (DataTable) at [URL]"The overload of Fill that takes DataTable as a parameter only obtains the first result. Use an overload of Fill that takes DataSet as a parameter to obtain multiple results."Does this mean that I am on the wrong trackby using a datatable where I should be using a dataset? Does "multiple results" mean filling the dataset multiple times like I am trying to do with the datatable?
Using clsCnn As New SqlClient.SqlConnection("Server=REXSQLEXPRESS;Database=dmf;Trusted_Connection=True;") clsCnn.Open() Dim clsCmd As New SqlClient.SqlCommand
I have a datatable that was created with the dataset designer. I have it bound to my datagridview. All the columns are set up the way I want, etc. I am performing a SQL operation at runtime, so I can create SQL statements dynamically rather than creating them with the designer. When I try to fill the existing datatable, I get no results. There is no error, but the data i should be seeing in the DGV is not there. However, if I fill a dataset that is created in code at runtime, and then set table(0) of that dataset as the DGV's datasource, the data displays as it should.
It seems I've tried a million little variations of this and I keep getting the same error: "The SelectCommand property has not been initialized before calling 'Fill'
Imports System.Data Imports MySql.Data.MySqlClient Public Class clsDB
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 read many posts on this topic; among them and most recently .NET - Convert Generic Collection to Data Table. Unfortunately, all to no avail.
I have a generic collection of structures :
Private Structure MyStruct Dim sState as String Dim lValue as Long Dim iLayer as Integer End Structure
Dim LOStates As New List(Of MyStruct) I need to fill a DataTable with this list of structures but have no idea how to go about doing this. I am using vb.net in Visual Studio 2008.
I want to modify this function to populate an array with each item in the database.I have tried various options, but I just can't get it to work
Private Function ConnectMe() As DataTable Dim conn As String = "Server=192.168.0.36;Port=3306;Database=wswc;Uid=r oot;Pwd=Jack" Dim cmd As String = "SELECT * FROM st_users"
[code]....
Instead of fill, I want to one by one add it to the dataset and also an array?
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?
i fill a datatable in a typed dataset.. it has cities and states but I want to pull just distinct states and bind it to a control etc.. there is the filter, but i havent found a way to do distinct or group by. got to be a way without adding more datatables and filling them with data thats already there right?
VB2010, MySql I have a dataview generated from a datatable using a rowfilter.I have event handlers listening to the dataview.listchanged event. To keep the datatable (in memory) in sync with the mysql database (on a remote server), i issue datadapter.fill commands every now and then, the objective being that only the changed rows in the datatable (as a result of the fill) would generate a listchanged event on the dataview.To my surprise the dataview_listchanged event fires after refresh by the dataadapter.fill method, however the ListChangedType it gives is: ListChangedType = reset. I would have expected a ListChangedType.ItemChanged for every changed datarow.Since the dataview is used to populate a large storage yard, i am now forced to repopulate the whole storage yard, which is a time consuming business.Is there a way to only generate DataView.ListChanged events for rows in the datatable that are actually changed by the datadapter.fill method?
When I declare two datatables and fill them both from a datatable returned by a function in class, that when i filter the one it seems to filter the other aswell?
For example:
I declare the datatable and initiate my class:
Dim DatatableOne As New Datatable Dim DatatableTwo As New Datatable
Dim MyClass As New MyClass
I then call the function that returns a datatable and apply it to datatable1 and 2 Then fill two DataGrids with the table:
At the top of my code for the form I have the following statements (and some other unrelated ones to):
Dim LastDataRow As DataRow Public Event RowChanged As DataRowChangeEventHandler
When my form loads I run the following line of code:
AddHandler dt.RowChanged, New DataRowChangeEventHandler(AddressOf Row_Changed)
After the form loads I have a FetchData button which connects to the database and brings the records into a datatable object. During this fill operation my Row_Changed event fires (for every record I think) and tries to run DataAdapter.Update(DataTable) (pseudocode) which ultimately fails because I haven't yet created commands. The error I get in my Row_Changed procedure is:
Update requires a valid InsertCommand when passed DataRow collection with new rows.I hadn't even planned to use an InsertCommand at all since I will not be allowing users to insert records from this form. I do plan to allow them to delete or modify existing records, but not insert new ones.run my AddHandler statement after filling the datatable. However, I'm trying to figure out how to rewrite my code so that I can refresh the datatable without closing out the form/application and having to open it up again. I think that's a problem for a separate discussion.
I'm following this tutorial: [URL]..except I'm connecting to my own data source - a MS Access database.This is the query I have setup with the dataset:
SELECT Terminal_ID, SUM(Transaction_Quantity) AS Total FROM tblTransaction WHERE TransactionType_ID=3 and Transaction_DateTime>[@fromdate] GROUP BY Terminal_ID
The debug fails immediately because it needs the extra parameter so I change the code from:
Public Class Form1 Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load 'TODO: This line of code loads data into the 'tetrisDataSet.tblTransaction' table. You can move, or remove it, as needed. Me.tblTransactionTableAdapter.Fill(Me.tetrisDataSet.tblTransaction)
[code].....
The error I get on build is:Too many arguments to 'Public Overridable Overloads Function Fill(dataTable As tetrisDataSet.tblTransactionDataTable) As Integer
...I gave it the extra parameter, so what gives? Something special I need to do as it's a datetime field?
I want to add a new select command to my dataset. To do that, I have added a new partial class to my project. Because we have to use partial class if we want to extend generated dataset codes. [code]...
