I have a database in .ACCDB format with some tables.
I'm successfully loading it into an OleDbDataReader with the following code:
string connectionString = "Provider=Microsoft.ACE.OLEDB.12.0;data source=C:\marcelo.accdb";
OleDbConnection conn = new OleDbConnection(connectionString);
[Code].....
I'd like to load the table "clientes" to a datatable instead. How should I do it ?
I am using Dynamic Textboxes. I am Loading table in Datatable from Database. From that Datatable i am naming the textboxes. After entering some values in the textboxes during runtime, i want that values to be added to the database. So i Coded as below. But i am getting errors as value of type '1-dimensional array of System.Windows.Forms.Control' cannot be converted to 'System.Windows.Forms.TextBox'.Here's my coding
Private Sub btn_click(ByVal sender As Object, ByVal e As System.EventArgs)
[Code]...
I'm having some trouble trying to export a datatable to Access. I've built an Access DB and Table identical to the datatable that I'm trying to export using ADOX.Now using and OLEDB connection I'm trying to populate that table. The following code works just fine in another app written in 2005 but not in 2008 for some reason.
Basically I'm bringing in the empty Access table into a dataset.Filling that table with the rows from the export datatable.Then running the dataadapter's update method to send the data to Access.The problem is the da_a.Update doesn't seem to work. No errors, the Access table just isn't being populated. I checked my before and after counts. I know that the datatable is being populated. It's just not landing in Access.
Dim conn_a As New OleDb.OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & strFullFileName)
conn_a.Open()
'Select Access Table into new Dataset[code]....
I have a table in Access with two key fields (let's call them Item and Cust). These key fields *combined* are the primary key. So each record must have a unique Item and User combination. It can have a duplicate Item with other records, and a duplicate Cust with other records, but not a duplicate of both. Because my "primary key" is a combination of two fields, I can't make a primary key on the table in Access (it only supports one field as a primary key).
I have another table in SQLServer which also has Item and Cust, but in addition, is has several descriptive fields that give more details about the Item and Cust. I'm trying to use ADO.NET to bring in that SQL Server table and UPDATE some matching fields in Access with the descriptive fields. [Code]
Source: DataTable
Destination: Access Database Table
I should mention that the DataTable contains data resulted by an SQL SELECT query and it's not related to the "targeted" Access Database Table.
load the contents of a query from a dataTable Adapter into a datatable?
View 2 RepliesAn unhandled exception of type 'System.InvalidOperationException' occurred in system.windows.forms.dllerror in line: dbAdp.Update(dbDset) in btnSave_Click, (elseif editflag = true) blockdescription: Update unable to find TableMapping['Table'] or DataTable 'Table'I was also wondering if I could simply use the ExecuteNonQuery for the delete statement, but since I've placed my data in a datarow, I'm not sure if i can actually use it. Any thoughts on this? Btw, this is my first time using a datarow, and I've recently been studying how to use ADO.net.
dr = dbDset.Tables(0).Rows(CurIndex)
dr.Delete()
dbAdp.Update(dbDset.Tables("addresses"))
[code].....
I'm trying to call a stored procedure for a vb.net WCF program. For some reason, it's not returning any rows on the vb side. It should be a simple datatable.load(cmd.executereader). When I execute the stored proc in SQL, I get at least two rows. There are NO parameters for the stored proc. Here's my VB code:
[Code]...
I am loading data from an excel sheet using the following code.The first test I did worked fine.But when I tried another sheet it errored on a cell that was blank"Object reference not set to an instance of an object".Even though the sheet in the first test had blank cells.I need the loop to load the blank cell in the datatable
For nRow = 1 To objSheet.UsedRange.Rows.Count - 1
dr = dt.NewRow
For nCol = 0 To objSheet.UsedRange.Columns.Count - 1
[code]...
I currently have a procedure that stores the Level, Parent.Level, and Text properties of each TreeNode in a TreeView control in a DataTable.I can't seem to come up with the logic to load this data back into the TreeView from scratch, though.
Below is what i currently have in place which does not work.
Private Sub LoadTree(ByVal table As Data.DataTable)
treeBilling.Nodes.Clear()
For Each row As Data.DataRow In table.Rows
[code]....
I want to add a new table in my accdb and copy the content tfrom an existing table into the new one.
Is there an easy way to do this?
I have a vb.net form to add, modify or delete the product list..i have a datagridview in which i m loading data from sql server datatable...now i have a text box which accepts code for the product..i want that when i press a key, all data starting with that key should be highlighted in datagridview.....
eg
i have product codes
A001
A002
A003
C001
D001,, etc..
Now i press A in text box...in datagridview all data with A should be highlighted
I am facing a "weird" problem with the DataGridView. In fact, I have a function, that loads each table of an xml file into a datagridview (27 tables all with same structure except one called Listes). In the datagridview I have a combobox column to select "type" (it's the 3rd Column, so it's index is 2 normally). The problem is that when I call the function loaddata for the first time, all work perfectly ! If I call it for a second time, to reload the data, I get an error of cast! I verified and it seems that first time I call the function the column that contains the combobox is column(2), but when I run it again automatically the indexes of the columns are changing and am getting the error, because the column that contains the combobox is becoming column (3) and that explains the cast error because the column'(2) is not anymore the combobox so the cast will fail ! What I can't understand is why it's reordering that way my columns automatically ?
Here is the code:
vb.net
Sub LoadData(Path As String )
Dim oData As DataSet
oData = New DataSet
oData.ReadXml(Path)
Dim i As Integer
Dim MaGrille As DataGridView
[Code] .....
how to load the contents of an Access Database table into a Dataset? The Access Database consists of multiple tables with different data table names but all tables has same row header and same data type.
View 2 RepliesI have just turned to using VB.net and would like to know why when I load an RTF (with tables in a 9x9 cell format) all appears in a 1x9 format...i.e. instead of loading the tables (some are side by side), they load up in series (below each other).
My simple line of code on a button is:
RichTextBox.LoadFile("c: est.rtf")
I wrote a function that allows me to retrieve data from a single SQL table and place it into 3 datagridviews. The problem i am having is as follows:* Whenever a user types something in anyone of the datagridviews that information is recorded in all three of the datagridviews.I am seeking partnership to address my issue. I have enclosed my function that is called to populate the 3 datagridviews
Function SetupColumns(ByVal str As String) As BindingSource
Data_set.Clear()
Try
[code]......
ive a dictionary database with table having 32000 entries... ive bound it to the listbox(using binding source and dataset)... but when the program starts it hangs for 1-2 minutes in the beginning..
View 4 RepliesI'm using VB.net and WPF 4, as well as an SQL database.
I have been using this EXACT code successfully for several days now, with absolutely no problems whatsoever. However, now, suddenly, it is throwing the weirdest exception...
Public Class ROSTER
Dim table_adapter As New AGENT_ROSTERTableAdapters.AGENTROSTERTableAdapter
Dim roster_table As New AGENT_ROSTER.AGENT_ROSTERDataTable
[Code]....
I have a set of code that builds a table as the user enters information. This information may be changed more than once before it is considered complete. After the user is done, I want them to click a button, and have that information entered into the SQL database where it belongs. Right now, the code I am using gives the error: "System.ArgumentException: This row already belongs to another table"
Is there a way to add a table to a table like this, or do I need to add each row to the SQL table as the user moves along.
Try
For Each row In Me.tblTraining
Me.DataSet1.docContent.Rows.Add(row)
[Code]....
I'm trying to connect to an Access table who's name includes spaces ('look Material Type').How do I identify this table in an OleDB string
View 2 RepliesI get a Syntax Error with the following code"ALTER TABLE receipts RENAME COLUMN payees TO payee"what I am doing wrong
View 18 RepliesI have a datatable in memory (a flat file, no primary key or relation to other table) and I wish to make a pivot table in Excel out of it. I have been using the Excel COM, so I am hoping that there is a way to do it this way. I have seen code that will put data in a pivot cache via an SQL connection string, but I have yet to find anyway of using a datatable as is.
View 10 RepliesI have a DataTable with 20 columns and it have lot of rows. I have created a SQL table which is have the same 20 columns. Now I want to copy the complete Datatable to SQL table using VB.net 2005.
View 3 Repliesasn1.htm (14.26K)
Number of downloads: 248Private Sub Command1_Click()
Dim HTML As HTMLDocument
[Code]......
I've been fighting with this problem for 2 weeks now and haven't been able to figure it out to parse data from a text file to a datatable using SteamReader. I am trying to import the data like it is displayed in the datatable into SQL Server 2005, I have tried using sqldataadapter approach, the standard approach, ADO.NET approach. [code]...
View 8 RepliesI am not getting any errors but the values of data table is not being inserted either
I have declared Public
Public x As Int16 = 0
Public table As New DataTable
[code].....
I used the DataSet Designer to create FTWDataSet which holds the AlarmText table from a SQLExpress database.This far my form contains ONLY Datagridview1.The code below successfully shows the contents of the AlarmText table plus the one added checkbox column (which I will populate with display-only data, and is not an issue here).
Dim ta As New FTWDataSetTableAdapters.AlarmTextTableAdapter
Dim dt As New FTWDataSet.AlarmTextDataTable
ta.Fill(dt)[code]....
What else do I need to do to use the DataGridView to edit and save values in the AlarmText table?
I have followin codes
Dim dt As DataTable
Dim str As New SqlClient.SqlCommand("select code,name from employees", con)
da = New SqlClient.SqlDataAdapter(str)
[Code].....
How to update datatable with master table?
How do I get a datatable that has been populated(filled) in a subroutine in one class and use it in a sub-routing in another class with that same data?
View 1 Repliesi have access database connected to application.. i have a table in database called "clanovi" (members) and first column items loaded to combobox their name and surname..now..when i select one of them from combo box i need all their other info loaded into several text boxes..adress,email etc..all of that info is in the same table ..i need some example code too .
View 6 Replies