VS2010 - Appending DataTable Fields To RecordSet?
Feb 24, 2011
I have some code from this site CodeProjectLink to convert a datatable to a recordset. This code had been working fine until I changed to .NET 4 (was previously 2), now when I call the following line:
Dim result As New ADODB.Recordset()
result.CursorLocation = ADODB.CursorLocationEnum.adUseClient
Dim resultFields As ADODB.Fields = result.Fields
Dim inColumns As System.Data.DataColumnCollection = inTable.Columns
For Each inColumn As DataColumn In inColumns
[Code] .....
I tried changing my line to just:
resultFields.Append(inColumn.ColumnName, TranslateType(inColumn.DataType))
But this gave the same error. The TranslateType function is correctly returning ADODB.DataTypeEnum.adVarChar so this seems valid as well
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Nov 25, 2009
I have some code from this site CodeProjectLink to convert a datatable to a recordset. This code had been working fine until I changed to .NET 4 (was previously 2), now when I call the following line:
Dim result As New ADODB.Recordset()
result.CursorLocation = ADODB.CursorLocationEnum.adUseClient
Dim resultFields As ADODB.Fields = result.Fields
[code].....
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Jul 15, 2009
I'm trying to create a recordset with 4 fields. So I created the recordset as: Dim rs As New ADODB.Recordset..I am new to VB .net and I dont know how to define the four fields in rs.
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Oct 26, 2010
The field's names of hashtable are same of fields adodb.recordsetHow can i import the fields value of hashtable in fields adodb.recordset without do it manually?[code]....
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Jul 13, 2009
I am developing an application on VB2008 with MySql as database. I opened the connection without any errors. I have three fields/columns in my database and on the form. When I am running vb form data is not reflecting on to form fields.
I have written the following code in form load event.
'Dim cn As ADODB.Connection
'Dim rs As New ADODB.Recordset
'cn = New ADODB.Connection
'cn.ConnectionString = "DRIVER={MySQL ODBC 3.51 Driver};" + "SERVER=localhost;" + "DATABASE=in_out;" + "UID=root;" + "PASSWORD=pacvision;" + "OPTION=3;"
'cn.Open()
'MessageBox.Show("Connection Opened Successfully")
'rs.Open("Select * from deptno", cn.ConnectionString, ADODB.CursorTypeEnum.adOpenKeyset, ADODB.LockTypeEnum.adLockOptimistic)
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Mar 15, 2011
I got a DataGrid Control that uses an Adodb.Recordset as a data source. I'd like to change the data type of the dodb.Recordset.Fields at run time. PS:I tried use the Type property but I got a message that it can't perform the operation when the object is open. Then I tried closing it with Close() but then it says the field is not available.
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Jun 1, 2011
I am trying to convert some old VB6 code into VB.NET. The old code used DAO and now I am trying to replicate it in ADO.NET/OleDB. I have made some advances (I think...) but now I can't figure out how to add the DataTable object into the database.[code]So instead of the TableDef, I am taking the data from the same sheet and putting it in a DataTable object (dt). I hope this is correct so far. Now my question is how to replicate the m_db.TableDefs.Append td line from above.
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Oct 7, 2011
how to update fields in an Access database through VB. What I'm supposed to do subtract the quantity of the daily orders from the inventory quantity. My textbook is a little bit vague at this point, because the only way it describes updating the DB is manually through the BindingSourceNavigator. I don't want to enter it manually, I want it to subtract the quantity from the orders table.
Public Class frmMicroland
Private Sub frmMicroland_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[Code].....
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Aug 9, 2010
Is it possible to pass adodb.recordset from VB6 to datatable? Just thinkin', I have created a dll from VB6 that is returning a record, in the future I want my .net apps to call from it. Or I have to build a new one from .NET?
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Sep 28, 2011
I'm appending string variable text after appending a line throws System.OutOfMemoryException?
Can any one explain why it is throwing error.
str+="something Text"
str+="something Text"
and lastly I assign it to a lable text When I assign the value of str it throws exception.....
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Dec 13, 2010
I have an application where I would like to allow the user to change one field in a datatable but leave the other ones uneditable. I am using a datagridview to do this but I can only make the whole table editable or not. The result should be an order form where you have a determined product and should only be able to change the number of items.
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Jun 22, 2010
is there a way i can get my datatable to have multiple constraints that are attached to a unique id? an example of what i'm talking about is if i have a unique machine but it's on many lines, can i show that somehow in a datatable? the reason i'm asking is that i have code that sorts the data by line number and shows the relevant machines in a combo box based on the line selection out of another combo box. i'm having to input the data into the datatable (as a starting point for the data base) and it's very tedious. i'm entering machines that have the same name in multiple rows because the line number is different. i can't figure out how i can add multliple values into my line number column so that it will sort properly when queried.an example of what i'm asking with regard to the datatable is as follows:
Machine LineNumber
slicer Line 1, Line 2, Line 4
conveyor belt Line 1, Line 6
So that when called to fill the combo box, the correct one is called.The code i'm using to sort right now is as follows:
Private Sub linecbo_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles linecbo.SelectedIndexChanged
Dim cline As String
[code]....
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Jun 15, 2010
This is bug in VB 2008
Dim dsExpre as New DataTable
Table has Two Fields (ExprID, Expression)
112,xyz
113,abc
Private Sub..........
Dim rsExpr as DataRow=Nothing
Dim i as Integer
[Code] .....
The Problem is, When i becomes 2, Table Data also becomes "q", Why....?
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Feb 25, 2010
I have a dynamic query which returns a DataTable. This DataTable will contain a varying number of columns depending on the selection used in the query. I want an efficient way of filtering the records in the DataTable.
For Example The DataTable contains columns : A, B, C and D
I need to query this data at serveral points in my program. At some point I may need records where A=10 and C>40. At another point I may need records where A<10 and D=90 etc.etc. The selects are dymanmic, I do not now what Columns or values are needed until the code is executing.
I could simply use a DataTable Filter and build the selection string dynamically. I have no problem with this. However I was wondering if using LINQ would be more applicable. I am completely new to LINQ and would like to use it but don't know its capabilities.
(At present I am using a DataTable but in future this may change to a collection of Objects)
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Mar 23, 2012
Basically what I want to do is, say after I've filled my datatable(whichever fill method i used[dataadapter.fill; or datatable.load(reader)]), now the datatable has the fields i've selected albeit, "Select * from" or "Select field1, field3 from" - either way the table now has my fields. Later incode when i'm ready to access them, say "dt.rows(x)(" OR "dt.rows(x)!", right here I would like intelisense to show me the available fields for that table. I already have my clsDataTable that inherits DataTable.
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Mar 4, 2011
I want to select column 'F1' from an excel spreadsheet and dump the data into my datatable 'oleDT'. How do I map the column F1 to the column i've added called 'colTest' ? When i call Fill, the dataTable has 2 columns, which are 'colTest' full of nulls and a created column called F1.[code]...
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Jun 28, 2011
I am filling data from a sheet of Excel book to datatable . The excel sheet contains about 160 columns. It gives error message "to many fields"[code]...
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Jul 15, 2009
How do you change an ADODB recordset to ADO.Net recordset?
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Nov 14, 2011
I'm currently refactoring an old Visual Basic DLL (VB.Net), which stores all of its data in one module called Globaldefinitions as public fields. There are about 200 fields, referenced thousands of times all around the code:
Public Module Globaldefinitons
Public a As Short
...
Public zz10 As Double
[Code]...
I need to change the module into a class with non-shared fields. This means, each and every of these thousands of references needs to reference the instance of that class:
globalDefinitionsInstance.a = 5
How do I go about this efficiently?
Regular expressions operating on the source fall flat. Refactoring tools like Re-Sharper or CodeRush don't seem to offer this functionality. Visual Studio 2010 cannot do it automatically either.
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Jun 19, 2011
Class Foo
ReadOnly name As String
Public Sub New(name As String, dependentUpon As Foo)
Me.name = name
[code]....
The output of New Bar() is:
Dependent created. Dependent upon nothing.
Independent created. Dependent upon nothing.
It seems fields are initialized in the same order as they appear in the source code, which (a) leads to an unexpected result, and (b) seems a little puzzling, given that one is normally not permitted to read from uninitialized variables in .NET, yet that seems to be working fine above.I would've expected VB.NET to be smart enough to initialize referenced fields first, and only then those that reference it; i.e. I'd have liked to see this output instead:
Independent created. Dependent upon nothing.
Dependent created. Dependent upon Independent.
how to get VB.NET to behave like that instead, without simply having to swap the declaration order of dependent and independent inside class Bar?
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May 27, 2012
I'm trying to create a table in Word using data from a table in Access. There are four fields in the access table that I need. 3 fields are text which I can populate the Word without any issues. However the fourth field is a memo with >255 characters.I'm struggling to come up with the proper code to allow me to populate the Word field with the memo data that has more than 255 characters. The code I have so far is listed below. But when it hits the memo field, it crashes on the line I marked with **. I know it's not text, but I've tried many different field types, but nothing has worked so far.[code]...
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Jan 14, 2012
My intent is to have the code - on a button.click event - check the Username and Password fields and return an error depending on which is wrong. Or if both are wrong, return a different error message. I've set the username as parts and the password as parts (still learning how to use external authentication). [Code]
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Aug 17, 2010
I have several sqldatasources for my gridview. All of the columns are autogenerated. However they all have some consistent fields and I'd like to make those fields template fields so I can modify the edit template for them such as adding a drop down menu. Is this possible?
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Sep 3, 2009
experience on how to create an engine using C# (VB.NET is okay too) that is generic enough to handle most cases of MS Word text fields I need to fill with data I'm getting from a database? In short, I'm about to embark on this little Office automation excursion and I'm hoping a little bit of feedback here.
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Oct 28, 2010
i have the following code which appends a text base file knowen as a .pgp file; all works fine except that everytime i launch this app i append the text in one continual line i need the text to appned to a new line eveytime it is used.Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
[Code]...
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Sep 22, 2011
s1nickelFrontImage is a declared variable, and I have others similar to it, they run up to 10.
how can I append/change the variable 's1nickelFrontImage1' to 's1nickelFrontImage2', and so forth, until LOOP is complete.(always increases by 1)
Do While ac1IMGPtoCCount > 0
ac1ImgPtoCString = ac1ImgPtoCString & s1nickelFrontImage1
ac1IMGPtoCCount = ac1IMGPtoCCount - 1
Loop
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Apr 6, 2010
I am trying to use and display calculations from various text fields, however it is appending the values. I think it has to do with it being a String Variable and not a Value.. here is the code
Private Sub btnTransact_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnTransact.Click
If rb1Deduct.Checked = True Then txtp1Amt.Text = (txtp1Amt.Text - txtTransact.Text)
[code].....
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Aug 17, 2011
I have a list of file names and there locations as follows:
c:ICTAUTOCAD_2010Customisations2009040920090409.lsp
c:ICTAUTOCAD_2010CustomisationsAdvanced OffsetLSPADVANCED
OFFSET.lsp c:ICTAUTOCAD_2010CustomisationsLockDWGLSPLockDWG.lsp
c:ICTAUTOCAD_2010LSPacad2010doc.lsp
The list is very basic but should be appended to say:
(load "c:ICTAUTOCAD_2010Customisations2009040920090409.lsp")
(load "c:ICTAUTOCAD_2010CustomisationsAdvanced OffsetLSPADVANCED OFFSET.lsp")
(load "c:ICTAUTOCAD_2010CustomisationsLockDWGLSPLockDWG.lsp")
(load "c:ICTAUTOCAD_2010LSPacad2010doc.lsp")
How can this be done with VB.net?
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May 21, 2011
How would I go about appending text to a Textbox without losing the current scrollbar position? I thought somehting as simple as:
Textbox1.Text += "MyString" & vbCrLf
would work, but it just sends the scrollbars to the top.
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Feb 16, 2009
This append feature does not seem to work. I've looked in many places to no avail. The other examples below for writing and reading seem to be going fine.
Private Sub ApFile(ByVal textFilePath As String)
Dim objWriter As System.IO.StreamWriter = file.appendtext("textTBD")
objWriter.WriteLine("textTBD")
[code].....
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