Dataset Merging Sorts Records Incorrectly?
Feb 4, 2011
I have a temp dataset (ds) that I load with data from a filtered dataset. I run this in a loop essentially populating the temp dataset with select records from the main dataset. I then merge the temp dataset back to the main dataset (dsSpecifics). The issue I am running into is that the records are loaded into the temp dataset in the way they were merged. record 1 is at row 0, record 2 is at row 1 and so on. When I merge the ds back to dsSpecifics, they load out of order but in a predictable way. Here is a snipit of the code:
myAircraft.Reset()
While myAircraft.MoveNext()
Me.TblAircraftSpecificTableAdapter.FillBy(Me.DsSpecifics.tblAircraftSpecific, CInt(myAircraft.Key.ToString))
[Code].....
It seems that after the final merge, the merge starts with the last record of ds and and then rolls over to record position 0.
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Sep 8, 2009
I have a data table in my dataset which was created with the following script.[code]
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Dec 29, 2011
How do I update records in a dataset with records in a transaction file?
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Jul 16, 2009
I'm following a tutorial using serialization/saving records.I can make records, display them ok in a datgridview and then save them ok using serialization. Then I can reopen the programme and reload the dataset from the deserialised file, and show the records ok [code]....
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Jul 16, 2009
I'm following a tutorial using serialization/saving records. I can make records, display them ok in a datgridview and then save them ok using serialization. Then I can reopen the programme and reload the dataset from the deserialised file, and show the records ok - but I cannot add any more records to the datagridview.
Here is my code:
Imports System.IO
Imports System.Runtime.Serialization
Imports System.Runtime.Serialization.Formatters.Binary
[Code].....
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Jul 18, 2010
i have a register form and a dataset called clifs_project21Dataset.xsd
i just want to update
de info from register form to dataset and i use acces 2007
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Mar 30, 2010
I want to return the top 5 records of a table in a dataset for datagrid view. The following does not work.
DataGridView.DataSource = DS.Tables("TABLENAME").Select("SELECT TOP 5")
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Mar 12, 2009
having trouble adding records to an existing dataset, I tried the following code but it made a new connection which I don't want:
Dim inc As Integer
Dim con As New OleDb.OleDbConnection
Dim da As OleDb.OleDbDataAdapter
Dim sql As String
[code].....
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Jun 24, 2010
I have used VB6 for all kinds of database programming. Now I am fairly new to the vb.net. How do we read the records (rows) from a dataset and manipulate data? I want to populate a combobox or a datagrid with a recordset (in VB6 language). What is the .net equivalent of ado dataset, and how do I use it. I have tried several ways using dataadapters and dataset, etc.
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Feb 21, 2012
I am trying to use a ListView to display records from a dataset. In these records, I have 4 columns: EmployeeID, EmployeeName, CustomerID, and CustomerName. It is possible for both the Employee and Customer to be listed multiple times, but with different combinations.
For instance, if we have Employees 1, 2, 3 and Customers A, B, C we could have:
(1A)
(1B)
(1C)
(2A)
(2B)
etc.
What's going on with mine is I add say (1A) to the listView and then when it tries to add (1B) I get an error saying that it cannot add the same item.
Here is my code so far:
With list
.Clear()
.Columns.Add("Employee ID")
.Columns.Add("Employee Name")
.Columns.Add("Customer ID")
.Columns.Add("Customer Name")
[Code] .....
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Mar 11, 2012
so I have chosen to add the database to my vb project when the connection was being set up in Visual Studios 2010. so the code below inserts it to dataset, but database doesnt seem to be updated, I am trying to add new records to Business and Login tables and have defined two functions to assign the value of text boxes to the fields on the records: [Code]
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Jun 7, 2010
I want to display dataset records in textboxes instead of GridView. I also want to provide next, previous and search option to navigate between records in the dataset. And I also want to provide update and delete buttons to update and delete the current record that is being displayed.
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Jun 19, 2011
I'm having a problem with editing records in my DataSet. When adding a record to the database, I have a button that adds to the binding source
[code]...
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Dec 19, 2009
I've got a form where a user enters data. When the user submits that data, it inserts a record to two separate tables via a dataset. One of the records has no problem being saved into the database (in the table it was put into), but the other record seems to temporarily be in there (according to a third form), because it exists for the duration of the application, but when I exit, and then check the database, it's not there, and it's not shown on the third form when I restart the application again either.
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May 2, 2011
I need to add rows to a DataSet using databound controls in VB.net. I've set up the data bindings themselves, they're bound the the correct controls, and the BindingSource uses the correct DataSet. The DataSet is filled from the DataAdapter correctly, and the binding source works, as the navigation controls all work fine. How do I use the controls to add new data to the DataSet? I guess there must be some kind of end-edit involved which would enable me to insert, update and delete records in the DataSet (as you would use with DataGridViews)
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May 11, 2012
Im inserting records from a dataset to access table by selecting a key(dix) from a listbox. below is the code Sub loop2(ByVal dix)
ds.Clear()
table_name1 = "TestStepDetailTable"
con.ConnectionString = dbprovider
con.Open()
'MsgBox("database is open")
[Code]...
The problem is when i insert a first key(dix) records its coying fine. But when i insert the second set of records in is sorting int he table. but when i looked at the dataset by using gridview the recods appears in a right order. but the updated table is somewat sorted order. Is there any possible way to insert the records in the same order in the dataset..
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Mar 15, 2011
I'm using the following code to write the data and schema of a dataset to a XML file.
[Code]...
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Jan 1, 2011
What I am trying to do is update existing records in a dataset with an unbound datagridview. It updates just fine but I have added a simple backcolor change for errors. What I don't understand is it will update fine but throw the backcolor = red at the same time. Am I overlooking something here?
vb.net
For Each dr As DataRow In Form1.DbDataSet.Tables("tblInventory").Select() For Each row As DataGridViewRow In DataGridView1.Rows If row.Cells("colInventoryID").Value = vbEmpty Then 'Do Nothing Else If dr.Item("Inventory ID").ToString() = row.Cells("colInventoryID").Value.ToString() And
[code]....
I'm trying to get this working in a test application before adding it to my main project, so that's why the names of controls are the way they are.The errors I'm trying to show are if "Inventory ID", "Cart" and "Shelf" do not match. When they don't match it doesn't update, which is what it is supposed to do. However, if they do match they update just fine but also show the Inventory ID error. If I comment out that ElseIf for the Inventory, it throws the Cart error. It's like the ElseIf blocks get called even if the If statement is true...
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Mar 15, 2010
I want to create a sub that gets changes from my typed dataset and datatable. But it says mydatatable is not a public member of dataset. Passing in as objects.
Public Sub GetRateChanges(ByVal myDataSet, ByVal myDataTable)
If myDataSet.HasChanges(DataRowState.Modified Or DataRowState.Added) Then
' Create DataSet variable.
Dim xDataSet As DataSet
[CODE]...
Another question. . I pull this infor from a view via tableadapter and it comes from several different tables.. How could I save my changes and insert the new records to the appropriate tables>?
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Aug 29, 2011
I am having dataset with 5000 records.I am reading them in the below 2 functions and writing to excel.
FillDataRows1(worksheet)
FillDataRows2(worksheet)
private sub FillDataRow1(byval ws as worksheet)
[code]....
When I create thread also it is taking same time .
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Apr 5, 2011
I don't know why it is not saved to the table. Here is my code.
Private Sub btnSave_Click(ByVal sender As System.Object, ByVal e As _
System.EventArgs) Handles btnSave.Click
Try
[Code]....
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Aug 17, 2010
I have a DTO that I am using to process transactions. To ensure that it is processing in the correct order, I am using iComparable and sorting the List(of T) of the DTO. That works great. However I just got another requirement that the customer wants the output in a different order... is there a way to allow me to have two different sorts for the same object, or do I need to copy the current class, save the output as a new List of that type and sort using the new way for that object?
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Oct 13, 2011
Im converting a winforms application and it has gone smoothly except for trying to get custom sorts for generic lists working.
VS 2010 ASP.net 4.0
I have my classes in App_code but it fails to work like the winforms version.
Dim ReturnList as List(of Quotedata)
ReturnList.Sort(New SortQuoteDateAscending)
> Unable to cast object of type 'SortQuoteDateAscending' to type 'System.Collections.Generic.IComparer`1[Quotedata]
Is there a gotcha with asp.net implemenation of custom sorts in asp.net 4.0 or am I missing something.
Public Class Quotedata
Private m_quotedate As Date
Public Property QuoteDate() As Date
[Code]....
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Apr 1, 2011
I am using VB.NET and .NET framework 3.0I am currently sorting a list like this: lstPeople.Sort(Function(p1, p2) p1.LName.CompareTo(p2.LName))However, now I want to sort by FName as well after the LName. So it sorts first by last name and then by first name.
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Nov 6, 2009
I need a little guidance here. What I am needing to do is develop an application which sorts text files, approximately 10 at a time.It would look something like this. (Using VBA 2008)The code I am having trouble with, is I want to be able to "load" 10 of these txt reports.I want the Sort button to trigger the application to run through each text file looking for specific keywords.
And finally, when all is said and done, I want it to export a new text file with the keywords listed that it found.I am just breaking into this and am super excited with how much I have learned so far!
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Feb 23, 2009
Merging Two PDF files OR Merging Two Binary files
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Apr 26, 2012
I'm trying to develop a converter of sorts, and I need it to always round up, however, math.ceiling is not working like I would like. The converter I'm trying to develop is a Canadian MMAR Calculator.Here is my code.
Public Class Form1
Private Property growtype As Object
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click[cod
For some reason, when the variable < .5 it rounds down, and when the variable is > .5 it rounds up, I thought math.ceiling always rounded to the highest nearest whole.The issue comes at growtype 2 and 3, this equation "(num1 * 365) / (250 * 1) * 1.3" where num1 = 18 returns 34.164, I want this to round up to 35.
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Apr 21, 2009
I am trying to build an application using vb.net that will serve as a very large checklist of sorts. and i'm not exactly sure of the best way to do this. I considered using a database but i would need it to be self contained without having to rely on a server or internet connection
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Oct 20, 2010
I have a DataGridView, bound to a dataset. All the columns are sortable (.ColumnSortMode.Automatic). The user may change data in certain columns, although not the first ("key") column. When data gets changed on a row, I change the backcolor for that row (to show it as dirty). At some point, the user will do something with all of these changes.
My problem is that I still want the user to be able to resort the data by any of those columns. When it's sorted, though, I lose the backcolors that I changed. I do know which rows are dirty, this is just a cosmetic issue. Isn't there a way to retain those backcolors, or any other such row attribute?
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Aug 9, 2011
I'm using MySQL 5.5 database. I have created a database which only have one table where it stores all sorts of keywords according to categories.
The users key in sentences in the textbox and then I'm suppose to classify the sentences into the category based on the keywords in the database.
How do I loop through the database to compare the strings in the textbox to the keywords in the db?
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