UI Controls Show Much Less Record Than DataTable?
Feb 22, 2011
I have very strange problem, here it is: I have a quite large MS Access Database (2003) containing exactly 68020 records (rows). The problem is, when i read the entire database directly toa data representation control like DataGridView or Listbox,only 66710 records are returned. The weird thing is: If i load the entire database to a in-memory datatable object, rows.count gives "correct" amount of records as expected, that is 68020What is the reason of that? Why DataGridView or other controls cannot have records more than 66710 items? Is there an internal limitation? (That's dread if there is).
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Nov 18, 2011
stock table
fkodsno
[code].....
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Mar 1, 2012
I have an application that downloads about 19,000 records from a SQL table and I need to step through all the records doing a calculation on each then create a new Excel workbook with the data.
[Code]
m_rows does accurately report that the number of records in the datatable is the same as in the SQL table. I can add records to the XLS file with a for/next loop but they are all the first record of the datatable. So now that I have the data, how do I go through each record sequentially?
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May 14, 2011
I have a dataset, which have a column create_date which have value(5/12/2011 12.54.00) , but i want to select the value from dataset with date only not by time (i.e. 5/12/2011),[code]
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Jul 29, 2009
How do I add a few textboxes, comboboxes for each for in datatable?[code]...
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Jul 29, 2009
How do I add a few textboxes, comboboxes for each for in datatable?[code]...
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Apr 19, 2010
I want to use FindBy method to return record in a datatable and show the fields in the corresponding textboxes and other controls. The DataTable in which i am looking is already bound to these controls, maybe when I use the following code (which is not working correctly, hence this thread) the fields will show up rightaway?
{
Dim MoviesRow As New_Movie_DatabaseDataSet.My_Movies_TableRow
MoviesRow = New_Movie_DatabaseDataSet.My_Movies_TableDataTable.FindByID(ComboBox1.Text)
}
This is the error:
reference to a non-shared member requires an object reference.
I wanted to import Microsoft.Practices.ObjectBuilder2 but that does not work either.
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Apr 16, 2012
Syntax error: Missing operand after 'top' operator.on line below dg.DataSource = dsResult.Tables("aTable").Select("RowID in (select top (100) [RowID] from aTable)")
Does anyone other way to do this.
BTW the rowID is just a unique id.
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Dec 26, 2011
Please any genius can help me about how to display record in text box.and my database is attached in my project not with sql [code]with this connection how i show data record in text box please every one Student
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Mar 14, 2011
i have form that save data in sql database use linq ince of column is related to othere table ID i need some how show the name of record in database in combobox but when i select it combobox return the id of it
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Feb 7, 2011
I have created a usercontrol. I would like to add one of these user controls per record in a recordset.
I have almost all the code created ready, and the control ready and available for use, however i can not find how to add the new control.
How do i go about this
I have my user control contained in a project Continuous_Form_Control1, called UserControl1.vb
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Mar 18, 2011
I have written a code which adds some information to a database. No problem with that since the records get inside the database. My problem is that the record I added always shows up on my Search. I tried changing the variables so that none will have the same names between the two forms but it still shows.Example:
1. I added a record of a book which has an id of 1, name of Cisco, and total of 50. I added it thru the debug function.
2. I added a record of a book which has an id of 2, name of Link, and total of 30. This time, I added it directly on the database file itself.
2. I created a search button which will show records depending on the input of the user.If I type "1" for the ID, the first record will appear on the datagrid. If I type "2" for the ID, both records will appear. If I type "3" which I doesn't have any record with, the FIRST record will still appear. To summarize it, the record that I added through the program itself will always show up on the query results, no matter what I type into.
Dim command As New OleDb.OleDbCommand
Dim adapter2 As New OleDb.OleDbDataAdapter
Dim bkId, bkTtl As Integer
[code].....
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Jul 4, 2011
I'm fine with both C# and VB.NET..I have two tables. Authors and Books. It's a one to many relationship, Authors to Books. I'm writing a query to show how many books that each author has.[code]But in the Authors table, there are some authors without any books yet. For example, there two authors, Author D and Author E that have no books yet. I want to write query that includes all authors and number of ther books, even though they don't have any book yet, no record in the Books table yet.
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Jun 16, 2012
I'm using a DataGridView that gets its data from table in Microsoft Access, one of the fields is a Short Time type record (e.g 16:00) but when the DataGridView is loaded it shows the record as "16:00 12/31/1899" and never shows only the ShortTime.
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Jan 23, 2009
I am using VB 2008 and SQL Server 2005. I have a texbox in which I need to show the field 'domain' from the table x. I am getting the field in the format needed from a stored procedure.Below is the Vb code that I am using in which I am getting an error message: Invalid attempt to read when no data is present.at this line sDomain = sDomain & " " & v_DR!Search
[Code]...
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Jan 19, 2010
I have a access database connected to a project in Visual Basic Express 2008.This is a database for items I have.I my database, when I change reccord from one item to another, I try to have a picturebox to display acutal picture for the item.
Dim NKnr As ????
If NKnr = txtNKnr Then
picFrimerke.Image = System.Drawing.Image.FromFile("C:Program FilesFrimBas
knrpic"txtNKnr".jpg")
the value in "txtNKnr" referer to a picture with the same name in given folder.
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Apr 20, 2010
My DevExpress CSV export has two lines per record.
Rank Score,Prog.,Full Address
63.30 ,JIW ,1234 Whispering Pines Dr
, ,Sometown MI 48316
62.80 ,JIW ,9876 Beagle Dr
, ,Sometown Twp MI 48382
I would like to change it to one line because I want to do a Word Merge. (Unless Word can merge these two lines back together, which I do not thing it can do)
[Code]...
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Aug 25, 2011
Our shop primarily use "ADO objects" (I'm referring to DataSet, DataTable, and DataRow) for marshaling around data and manipulating it on forms and in grids. We are experimenting with creating shop-flavored counterparts to the native ADO objects so that we can impose our in-house standards on top of them. Implementing this is straightforward with one exception: I want our objects to be bindable to controls.
I'm aware of IList, IBindingList, BindingSource, etc. and have looked at and experimented with these, but I am falling short when it comes to making a class with no hard property names bindable. The native ADO objects are not strongly typed by default. You have column values that you access via the Item property (e.g. row("Age") or row.Item("Age")). The binding examples I've found online deal with strong-typed objects (e.g. row.Age). Essentially, we want to create custom ADO objects (not inherited from the native ones) that still retain their ability to bind to controls. In a grid I would expect to see columns Name, Age and Occupation from a row where these properties are exposed via row("Name"), row("Age") and row("Occupation"). This must be doable as this is exactly what the native DataTable and DataRow provide.
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Jul 25, 2011
I have a Console app that loops through a queue and processes each record in a datatable. Each process is long and time-consuming (connecting to a remote website, downloading files, reading them and adding them to the database). I'm trying to implement threading for speed's sake but am having cross-threading issues. (The job takes 8 hours or so to run and the cross-threading doesn't start happening until a couple hours into the run.)I'm trying to figure out how to make my code thread safe. I don't update or rely on any non-local variables, and I don't need to return anything. I've tried locking which works but defeats the purpose of the multiple threads. What other things should I be looking for?
[code]...
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May 14, 2012
I have on a form a UserControl that I use as a Data-Entry form. I show and hide it constantly with new data. Often (not all the times) the same two memo-boxes are shown on the screen first for a second, and then the full control is visible. I found this link, I'm not sure if that's my solution, but in any case I don't know where to call it and when. EDIT: I noticed that it happens 'only' if the program is idle for a couple of minutes. I could show and hide the control 10 times one after the other no problem. but if I hide it and show it again after 2-3 minutes then I get this behavior.
I guess it has to do with the time it takes to reconnect to the MsSQL database to pull the data. But how can I tell this 2 boxes to stay invisible like there parent until the parent is ready to show?
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Dec 5, 2010
How to Show and Save latest record on VB.net 2008 form with Label? I have a vb.net form to insert database to file *.mdb (Ms Access). But after I inserted database I want it save and show record that I just added on VB.net form. It's mean that current save without database...Show and Save Direct on Form's Label.
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Mar 11, 2010
I can show information by specific ID there in crystal report by following code.
[Code]...
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Jan 14, 2010
I am currently working with a datatable and I want to be able to show richtext in a column of the table. First question can this be done? I can force the column to be Type Of richtext box. However, when I try to view/display the table, I get something like..."System.Windows.Forms.RichTextbox, Text: Text That I have added" in the column.
Is there a way that I can get it to show the rich text in a cell of a datacolumn of a datatable?
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Oct 18, 2011
I am designing programe that diplay student record from database to some asp.net control like Label and Dropdown control and nagigate the record using Next and previous button I want to view One Record at Once at a page Bellow is my Html Page
[Code]...
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Jan 14, 2011
how to show error msg in literal if no record found in database according to the text entered in textbox1 and textbox2 else if show record in gridview if the text entered in textbox1 and textbox2 will be found in database ...
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May 5, 2008
In an attempt to learn VB I'm trying to build a database project for a friend's business. This db will be used to track customer information, predominantly for targeted marketing purposes. So far, the development has been slow (I'm still trying to adapt from VBA to VB), but its all starting to make sense now. I'm using two different forms for adding new customers and reviewing the information of existing customers, mainly because the database will grow by about 2,500 customers per year and we wanted to be able to search the records without returning every record when the forms load. Most of this works so far, but I'm having trouble with two issues.
When I open the new customer entry form, I want the form to automatically begin entering data without clicking the "Add New" button. The second problem involves the row ID from the database. It keep showing up as "-1", "-2" etc. The row ID records properly in the table, so no big deal. I have read that this problem is a bug in VB and that its nothing to worry about. However, down the road I will need to access the correct row ID from this same form in order to print out a report for the customer (as needed).
For what its worth here is the code I have so far:
Code:
'Update current record when the form closes
Private Sub frmNewCustomer_FormClosing(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing
Me.TblCustomersBindingSource.EndEdit()
Me.TblCustomersTableAdapter.Update(Me.dsNewCustomer.tblCustomers)
[Code] .....
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Jun 28, 2011
I have a GridView control which I am dynamically binding to a DataTable which is populated by a query built based on a set of selected options.What I am trying to do is simply handle the RowDataBound event in order to format specific rows based on the value of a database field. The code in this event handler works fine. My problem is, calling this event causes the GridView to only display the first record in the DataTable, almost as if the Gridview stops after binding to the DataTable after the first row is bound. I have attempted adding the handler dynamically, but I get the same results.I know for a fact that there is sufficient data being returned (the DataTable fills with all of the records, and the GridView shows all the records fine when not touching the RowDataBound event).
I'm adding the handler immediately after generating the query, filling the DataTable, and binding the GridView: [code]I have also determined that, when handling RowDataBound, the GridView's DATABOUND event never gets fired; it seems to stop binding right after binding the first row.
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Dec 15, 2011
My DataGridView1 does not show the data on my testdb.mdb i need to fix this first before i continue on adding records on my db.
Imports System.Data.OleDb
Public Class Customer
Dim con As OleDbConnection
[CODE]...
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Oct 14, 2010
Can't find any thing on google. How do i keep the controls aded to the toolstrip to always show?
They only show when got focus or mouse hovers over and it only shows the outline
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Oct 27, 2011
I searched for this topic and all the examples are in C# (and they have errors as they will not convert with a C# to VB converter). I am using VB.net 2005 and would like a sample that work for it. I have a loop that goes thru the DataGridView and changes the row color based on a column/cell value from the binded DataTable (shown below). I'd like to add to the loop (where the comment is) and also hide the button for this cell and let the "In Process" show in the cell instead.
Private Sub ColorInProcessItems()
' Color the rows green if they are In Process, red if they are Complete
For Each row As DataGridViewRow In dgvQueue.Rows
[code]....
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