Reading Dataset To Collection Gives Two Time As Many Rows?
Oct 1, 2011devicetypecollection = New Collection
devicetypecollection.Clear()
For Each dr1 As DataRow In _Default.ide.dtds.Tables(0).Rows
[code].....
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Rows Cannot Be Programmatically Added To The DataGridView's Rows Collection
Sep 2, 2010how to add Rows programmatically to the DataGridView's rows collection when the control is data-bound? here is my code but i got error as "Rows cannot be programmatically added to the DataGridView's rows collection when the control is data-bound? "
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VS 2010 - "Rows Cannot Be Programmatically Added To The DataGridView's Rows Collection When The Control Is Data-bound"
Sep 1, 2011Can anyone tell me why "Rows cannot be programmatically added to the DataGridView's rows collection when the control is data-bound." I keep getting an error "Invalid Operation Exception was Unhandled" error. All I am attempting to do is allow the user to select products from a list(or a second datagridview) and have it added to the datagridview so they do not have to type in every cell since the other cells are not visible because they do not purtain to their needs. Plus they will be able to save all items at the same time.
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VS 2010 - Datagridview - Rows Cannot Be Programmatically Added To DataGridView's Rows Collection When Control Is Data-bound
Sep 13, 2011I have two datagridview's both are databound. First one shows items for sale and the second stores all the items that were sold. I am trying too transfer selected rows from one to the other but no matter what I keep getting told "Rows cannot be programmatically added to the DataGridView's rows collection when the control is data-bound."
View 2 RepliesSaving Dataset To Database Which Has Imported Rows From Another Dataset
Jan 4, 2011I have a problem saving a dataset which contains rows that i have imported from another dataset. i can successfully view the imported rows in a gridview but i cannot commit the rows back to the database.
View 2 RepliesHow To Loop Through DGV Selected Rows Collection
Apr 1, 2009how to loop through DGV selected rows collection?
View 2 RepliesIn C#, Why Does A Datatable Not Know The Type Collection Of Rows
Jul 8, 2010I have recently started .NET programming, and looked at both VB.NET and C#. In VB.NET, a strongly typed Datatable cosisted of a collection of strongly types rows. Therefore, for example, this statement would work:
lCustomerTable As CustomerDataSet.CustomerTable
lCustomerRow as CustomerDataSet.CustomerTable.CustomerRow
lCustomerTable = TableAdapter.GetData
lCustomerRow = lCustomerTable.Rows(0)
However in C#, it seems i have to explicitly cast the returned Row to a CustomerRow:
lCustomerRow = (CustomerDataSet.CustomerTable.CustomerRow)lCustomerTable.Rows[0]
Should the dataset not create the object type definitions when creating the table adapters and SQL dataTables?
VS 2005 - Collection Of Unfinished Rows?
Jun 8, 2009I would like to create a group/collection/set of unfinished rows that I can later add to a datatable.I have tried to do this by creating a DataRowCollection, and then create a new row based on the table I want then add it to the collection. Doing that I get a NullReferenceException though.Using the new keyword for dr does not work.[code]......
View 4 RepliesVS 2010 : Query A DataTable To Get A Collection Of Rows?
Jul 12, 2011I'm trying to query a DataTable to get a collection of rows but I'm finding that my search string has to be the exact length of the columns width. So, for example this won't work:
Dim rows As DataRow() = (From r In myTable.AsEnumerable() Where r.Field(Of String)("fname") = "Bob").ToArray()
...but this will:
Dim rows As DataRow() = (From r In myTable.AsEnumerable() Where r.Field(Of String)("fname") = "Bob ").ToArray()
The search term ("Bob") has to be padded with spaces to make it equal in length to the column width (10 characters). Is this how it's supposed to work or am I doing something wrong?Also, how can I do a LIKE search? So for example, I want to search for all names that start with "Bo" or whatever. ie. "Bo*".
Answered Reading From Collection?
Dec 8, 2009I am working on a small program that reads items from a text file. The items are the split up into data and used to fill the menuItem() as menuItems. Each instance of menuItem has 3 properties (name(string), price(double), and menuType(string)). As an item is selected, it's price is added to the Order collection with :
Order.Add(menuItem(index).price)
The running total of the sum of the selected items is to be displayed in text box. I have,
txtTotal.Text = FormatCurrency(runningTotal()) ' with runningTotal as a function
Function runningTotal()
For Each menuItem As MenuItems In Order
[code]....
However, when run, this error appears. This is new coding to me, so if I'm just way off, let me know. Anywho, I tried with & without the CDbl. It doesn't seem to have any effect.
Dynamic List From DataTable.Select Rows Collection?
Jun 6, 2011I'm am creating a "pop-up" CheckedListBox over a button on my DataGridView. The values in the list are going to be filtered based on the value in column 0 of the DataGridView.I have already pulled in a "master" DataTable with two columns: ACODE and MATRIX.I want to call the following function and return an array of strings that I can use to build this CheckedListBox with. The line between "For Each r" and "Next" generates a "Number of indices is less than the number of dimensions of the indexed array". The number of items is variable in the array so I can't predefined it. I know I'm going down the wrong path.
Function StudyGroupSamples(ByVal sampleType As String) As String()
Dim thisArray() As String
Dim theseRows() As DataRow
[code]....
VS 2010 Query An Unbound DGV To Get A Collection Of Rows Where A Column Contains A Certain Value?
Jan 6, 2011Is it possible to query an unbound DGV to get a collection of rows where a column contains a certain value? Can LINQ do this?
View 10 RepliesPossible To Fill A Collection-Type Instead Of A DataTable/DataSet?
Aug 4, 2010this 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()
[code].....
VS 2005 Reading Files And Placing Them In A Collection?
Jul 23, 2009I have created football (American) play creator. When the user is satisfied with a play he has created it is saved it as a file with a .play extension. What I want to do is to cycle through all the files in a folder (probably named after the team), and place each one that has the .play extension into a CList (of ClPlay) collection.I have been able to successfully load one play at a time by using this code...
Dim fs As Stream = New FileStream(diaOpenPlay.FileName, FileMode.Open)
Dim bf As Runtime.Serialization.Formatters.Binary.BinaryFormatter = New Runtime.Serialization.Formatters.Binary.BinaryFormatter()
Dim Play As CLPlay
Play = CType(bf.Deserialize(fs), CLPlay)
...but that was when a specific play was selected from a load dialog box. This time I want to load all the plays in a folder and store it in a collection, and I'm not sure how to modify the above code to do that.
Fluent NHibernate Not Mapping Child Rows To A Collection Property (DB2 Database)
Nov 4, 2011The tables described herein both utilize composite keys. I have a parent table that stores eligibility information per "case". The child table stores eligibility information regarding each individual associated with the case. The child records are differentiated by pin number to make them unique in the child table only.
I am using NHibernate v3.1 with Fluent NHibernate v1.2, both acquired via NuGet packages. The entities are mapped in using the Fluent NHibernate auto-mapper functionality. Any custom mapping is done in the mapping override method for each entity.
Another thing to know is that these tables do not have a "primary key" defined in DB2. They only have "unique keys", which are what you see in the composite key definition below (see code).
T0026_AG_ELIG is the name of the parent table and the corresponding POCO class.
T0265_AG_IN_ELIG is the name of the child table and the corresponding POCO class.
Problem:
The problem is that when I execute the query, all the data is queried, the parent record is successfully mapped to the class, but the returned child rows do not map into the collection on the parent class. NHibernate does generate the queries for the parent and child data. When I execute my own query against the database, the correct data for the conditions does come back. For some reason, the child records are just not being bound to the property on the parent (T0026) class.
Question:
What do I need to do to get the multiple rows coming back from T0265_AG_IN_ELIG to map to their corresponding class and load properly into the specified collection property on the parent class (T0026_AG_ELIG)?
Collection Property of Parent (T0026_AG_ELIG):
Public Overridable Property IndividualEligibilityRecords As IList(Of T0265_AG_IN_ELIG)
Mapping Override for Parent (T0026_AG_ELIG):
mapping.CompositeId() _
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Update Requires A Valid InsertCommand When Passed DataRow Collection With New Rows
May 2, 2009Here is my code.....This code works fine but when I click on add button (Which is used to update record) the following exception/error comes
View 6 RepliesUpdate Requires A Valid InsertCommand When Passed DataRow Collection With New Rows?
Oct 18, 2011I'm still pretty new at .Net and database coding, and am working on a small program that is generating an error and I'm not sure how to resolve it.[code]The following statement is giving me the error below: m_DA.Update(m_DataTable)"Update requires a valid InsertCommand when passed DataRow collection with new Rows".I know the answer is going to be very simple, but I'm at a loss. I would greatly appreciate it if someone could point out the flaw in my code and how to correct it. And yes, I have done fairly extensive searching on this error, but none of them give any idea how to fix it, they just hint around at what's wrong.
View 9 RepliesVS 2008 : System.Data.DataSet, Which Is Not A Collection Type
Dec 30, 2009I am trying to export a dataset to a csv file
VB
Private Sub ExportDatasetToCsv(ByVal MyDataSet As DataSet)
Dim str As New StringBuilder
For Each dr As DataRow In MyDataSet
[code]....
I am getting an error on this line: For Each dr As DataRow In MyDataSet The error is Expression is of type 'System.Data.DataSet', which is not a collection type.
Reading Unlike Delimiter Text Files Into Collection?
Jun 13, 2009I want to read a text file with unlike delimters into a collection.This is what the file looks like:
_Item 4916 0.00 781.21
_Item 2831 0.02 842.25
there are 10029 items and i am trying to get each items description into 3 different collections: Item "names" (first column), Item "weights"(second column), and Item "values"(third column).the delimiters are as follows:
______(3 spaces)____(1 space)____
considering the amount of items in the file, it would be a complete waste of time to edit it.
InvalidOperationException : Update Requires A Valid InsertCommand When Passed DataRow Collection With New Rows?
Jan 8, 2010This was working on the last test, now it's throwing an InvalidOperationException saying Update requires a valid InsertCommand when passed DataRow collection with new rows. No change in this
Dim NewRowB as DataRow=dsBatch.Tables("Batch").NewRow
dsBatch.Tables("Batch").Rows.Add(NewRowB
daBatch.Update(dsBatch,"Batch")
What *has* changed is that I'm trying to fix the same error that's occurring on a different dataset in a different form. This should add a blank record to the dataset, then update the database. The blank fields allow nulls. The reason for this (and there may be another way to do this-I'm helping a novice fix up his code and, since this has been working, I haven't yet really looked at it) is to obtain the correct value for an identity field. We've found that when the row is added to the dataset, if it doesn't currently contain any rows, the identity value is set to zero-but when the database is updated, it gets a different value (because previously inserted rows have been deleted). So we update the database then retrieve the correct identity value before continuing.As I said, this was working fine-until I started working on the same problem occurring in a different dataset. So why would that affect this dataset?
Update Requires A Valid DeleteCommand When Passed DataRow Collection With Deleted Rows?
May 7, 2010I created VB.Net Win Form application in Visual Studio 2008 SP1 that connected to Microsoft SQL Server 2008.The DataGridView was used to connect the SQL Server 2008 and WinForms.When I delete or add records, run into error: Update requires a valid DeleteCommand when passed DataRow collection with deleted rows.
View 3 RepliesUpdate Requires A Valid UpdateCommand When Passed DataRow Collection With Modified Rows
Jul 27, 2007I 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:
Me.Validate()
Me.TitlesBindingSource.EndEdit()
Me.TitlesTableAdapter.Update(Me.VFCurvesDataSet.Titles)
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
Update Requires A Valid UpdateCommand When Passed DataRow Collection With Modified Rows?
Nov 11, 2005I get an error when I try to edit a cell that already containts data. What am I missing? be as explicit as I am very new at this.
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Add Additional Rows To Dataset?
Jan 26, 2011I have a parent/child relation I am trying to create fow 2 datasets.The parent ds consusts of a range of PO Header information
After I fill this dataset I loop through it getting the PO number. I then take that value and execute another sql statement on the DETAIL file and fill a dataset(dtlDS) for EACH row in the parent. How do I add to this dtlDS for each row? I am getting no CHILD data in the merge. Should I be filling to a datatable and do an add.row and THEN dump into the dtlDS?
Asp.net - No Rows Being Returned From Dataset JUST On IOS Using MVC 3
Aug 11, 2011I have a model that returns a dataset to a view and builds a list. The crazy thing is that I have tested this code with IE, Safari on Mac and Windows, Chrome and Opera and all return data. However, on the iPad or iPhone, zero rows are returned from the dataset object. It seems that the model is in fact passing the dataset to the view. I am using jquerymobile to render the view for the iOS devices and have taken that out of the mix to test and it still doesn't work.
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Sql - .NET, Testing If A Dataset Contains Rows?
Feb 21, 2010how can I test if a dataset has rows? I'm trying to see if my sql procedure call managed to fill up my dataset.Also, is there an easy way to print the rows to a label?
View 3 RepliesXML Reading Rows In Sequence
Feb 19, 2010I am creating a program which needs to read a regularly updated online XML file. I am using the XDocument type to do this and currently need to read each row and its attributes' values from XMLs like this one:
<?xml version='1.0' encoding='UTF-8'?>
<eveapi version="1">
<currentTime>2007-12-12 11:48:50</currentTime>
<result>
<rowset name="characters" key="characterID" columns="name,characterID,corporationName,corporationID">
[Code] .....
My first thought was to use a statement similar to this but apparently it is invalid:
For Each d...<rowset>.<row> In d...<rowset>
The reason that this code fails is that it never even enters the for loop, although I'm sure the if block code is wrong too which is why I put a comment there, but my main issue is making the loop work for reading each row in order.
Error 'update Requires A Valid Insert Command When Passed Data Row Collection With New Rows'
Jun 15, 2011When ever I try to update a record from data grid using a dataAdapter record it always showing ' update requires a valid insert command when passed data row collection with new rows' From specific sql server Table only. Resulting me holding up a project.
View 4 RepliesError Message: Rows Cannot Be Programmatically Added To DataGridView's Row Collection When The Control Is Data-bound
Sep 1, 2010I have DataGridView display Customers Details. The DataSource are from DataSet. After the user have created a new customer record and updated the SQL SERVER Table, Instread of refreshing the whole DataGridView I am trying to add new rows with data from the TEXTBOX into the DataGridView and it generated this error message: Rows cannot be programmatically added to DataGridView's row collection when the control is data-bound This is the coding which the error was generated from:
Private Sub FRefreshDataGridViewRow()
'use strmode to determine New or Edit existing record
Dim strCell1 As String = CType(Me.txtCustId.Text, String)
Dim strCell2 As String = CType(Me.txtCompName.Text, String)
[code].....
Adding Multiple Rows To Dataset?
Jun 21, 2010I have a piece of code that works for adding multiple rows to a dataset but I think that it is a lot of code and thought maybe someone may know a better way of doing it. I need to add rows to the dataset based on the selection of a combo box. ie if the user selects 15 the the program adds 15 rows to the dataset.
Case cboQty.SelectedItem = 3
Try
Dim dr As DataRow
[code].....
