At line 4 of my code, how or is it possible to have a condition in there?
For example:
Dim expr As String = "SELECT * FROM [Sheet1$] WHERE excelColumn1 <> NULL"
I have tried it, but it gives an Error: No value given for one or more required parameters.
Dim ExcelConnection As New System.Data.OleDb.OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Users\z.fontanilla\Documents\etl2.xlsx;Extended Properties=""Excel 12.0 Xml;HDR=Yes""")
ExcelConnection.Open()
Dim expr As String = "SELECT * FROM [Sheet1$]"
Dim objCmdSelect As OleDbCommand = New OleDbCommand(expr, ExcelConnection)
Dim objDR As OleDbDataReader
Dim SQLconn As New SqlConnection()
Dim ConnString As String = "Data Source=cyayay\sqlexpress;Initial Catalog=reportingDB;Integrated Security=True"
SQLconn.ConnectionString = ConnString
SQLconn.Open()
Using bulkCopy As SqlBulkCopy = New SqlBulkCopy(SQLconn)
bulkCopy.DestinationTableName = "tFalse"
Try
objDR = objCmdSelect.ExecuteReader
bulkCopy.BatchSize = 5000
bulkCopy.WriteToServer(objDR)
objDR.Close()
SQLconn.Close()
Catch ex As Exception
MsgBox(ex.ToString)
End Try
End Using
ExcelConnection.Close()
Related
I am trying to use OleDB and SQLBulkCopy to pull data off an excel spreadsheet, into an SQL database. When I try and run my code, I get the following exception, triggered by
"bulkCopy.WriteToServer(objDR)" (which is also described in the question title): exception data
OleDB successfully reads the excel sheet which is then populated properly in the DataGridView I created within a WinForm for debugging purposes.
Below is a snippet of the relevant code.
Dim ExcelConnection As New System.Data.OleDb.OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=\\damon\Everyone\sheet1erictest.xlsx;Extended Properties=""Excel 12.0 Xml;HDR=Yes""")
ExcelConnection.Open()
Dim sheet As String = "Sheet5$"
Dim expr As String = "SELECT * FROM [" + sheet + "]"
Dim objCmdSelect As OleDbCommand = New OleDbCommand(expr, ExcelConnection)
Dim objDR As OleDbDataReader
Dim SQLconn As New SqlConnection()
Dim ConnString As String = "SERVER=SqlDEV;DATABASE=Freight;Integrated Security=True"
SQLconn.ConnectionString = ConnString
SQLconn.Open()
Using bulkCopy As SqlBulkCopy = New SqlBulkCopy(SQLconn)
bulkCopy.DestinationTableName = "dbo.test"
Try
objDR = objCmdSelect.ExecuteReader
Dim dt = New DataTable()
dt.Load(objDR)
DataGridView1.AutoGenerateColumns = True
DataGridView1.DataSource = dt
DataGridView1.Refresh()
bulkCopy.WriteToServer(objDR)
objDR.Close()
SQLconn.Close()
Catch ex As Exception
MsgBox(ex.ToString)
End Try
End Using
End Sub
Your reader object is being used by the DataTable, so comment out those lines and run them separately later with a new instance:
objDR = objCmdSelect.ExecuteReader
'Dim dt = New DataTable()
'dt.Load(objDR)
'DataGridView1.AutoGenerateColumns = True
'DataGridView1.DataSource = dt
'DataGridView1.Refresh()
bulkCopy.WriteToServer(objDR)
I have a table with 9 records.
When I run SELECT * FROM table; in my VB.Net I only get 6 from the 9 records.
When I run the query in 'DB Browser' an SQLite viewer I get them all.
Here is my code:
Dim SQLconn As New SQLite.SQLiteConnection()
SQLconn.ConnectionString = connstring
If SQLconn.State = ConnectionState.Open Then SQLconn.Close()
Dim SQLcmd As New SQLiteCommand
Dim SQLdr As SQLiteDataReader
Dim SQLstr As String
SQLstr = "SELECT * FROM SignedEvent;"
SQLconn.Open()
SQLcmd.Connection = SQLconn
SQLcmd.CommandText = SQLstr
SQLdr = SQLcmd.ExecuteReader()
SQLcmd.Dispose()
While SQLdr.Read()
ListBox1.Items.Add(SQLdr("TotalTicketCounter").ToString)
End While
SQLdr.Close()
SQLconn.Close()
SQLconn.Dispose()
I am trying to fill the DataGridView (grvExcelData in this case) with data from an excel file. But I am getting the following error:
"Child list for field [Sheet1$] cannot be created"
Below is my code fragment where I am trying to fill the data grid view. Also I am using Visual Studio 2010 for programming
Thanks for your help in advance
Public Sub fillgrid()
Dim conn1 As String
conn1 = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" & filenamepath & ";Extended Properties=""Excel 12.0;HDR=Yes;IMEX=2"""
Dim connection As OleDbConnection = New OleDbConnection(conn1)
Dim da As OleDbDataAdapter = New OleDbDataAdapter("SELECT * FROM [Sheet1$]", connection)
Dim ds As DataSet = New DataSet()
Dim emptyfile As String = "The file does not have any records for inserting."
Dim selectCmd As OleDbCommand = New OleDbCommand()
selectCmd.Connection = connection
selectCmd.CommandText = "SELECT * FROM [Sheet1$]"
If connection.State = ConnectionState.Closed Then
connection.Open()
End If
da.SelectCommand = selectCmd
Dim dsCounter As Integer = da.Fill(ds, "[Sheet1$]")
If dsCounter = 0 Then
MessageBox.Show(emptyfile, "dsCounter")
End If
grvExcelData.DataSource = ds
grvExcelData.DataMember = "Sheet1"
grvExcelData.SelectionMode = DataGridViewSelectionMode.FullRowSelect
da.Dispose()
If connection.State = ConnectionState.Open Then
connection.Close()
connection.Dispose()
End If
End Sub
Change
grvExcelData.DataMember = "Sheet1"
to
grvExcelData.DataMember = "[Sheet1$]"
I get this error:
system.data.sqlclient.sqlexception timeout expired. the timeout period elapsed prior to completion of the operation or the server is not responding.
Code:
Dim ExcelConnection As New System.Data.OleDb.OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Users\z.fontanilla\Documents\etl.xlsx;Extended Properties=""Excel 12.0 Xml;HDR=Yes""")
ExcelConnection.Open()
Dim expr As String = "SELECT * FROM [Sheet1$]"
Dim objCmdSelect As OleDbCommand = New OleDbCommand(expr, ExcelConnection)
Dim objDR As OleDbDataReader
Dim SQLconn As New SqlConnection()
Dim ConnString As String = "Data Source=cyayay\sqlexpress;Initial Catalog=reportingDB;Integrated Security=True"
SQLconn.ConnectionString = ConnString
SQLconn.Open()
Using bulkCopy As SqlBulkCopy = New SqlBulkCopy(SQLconn)
bulkCopy.DestinationTableName = "tFalse"
Try
objDR = objCmdSelect.ExecuteReader
bulkCopy.WriteToServer(objDR)
objDR.Close()
SQLconn.Close()
Catch ex As Exception
MsgBox(ex.ToString)
End Try
End Using
ExcelConnection.Close()
You could try to set the CommandTimeout property on the objCmdSelect object to 700 (or whatever) value.
I am new to this and had this question. Can I use SQLDataReader instead of a Recordset. I want to achieve the following result in an SQLDataReader.
Dim dbConn As New ADODB.Connection
Dim rs As New ADODB.Recordset
Dim sqlstr As String = "SELECT Name,Status FROM table1 WHERE id=" + item_id.Value.ToString
rs.Open(SQL, dbConn)
While Not rs.EOF
txtName.Text = rs.Fields.Item("Name").Value
ddlstatus.SelectedIndex = 1
rs.MoveNext()
End While
rs.Close()
rs = Nothing
dbConn.Close()
dbConn = Nothing
Can I replace recordset with SQLDataReader and if I can can you please show me the changes in code?
Its highly recommend that you use the using pattern:
Dim sConnection As String = "server=(local);uid=sa;pwd=PassWord;database=DatabaseName"
Using Con As New SqlConnection(sConnection)
Con.Open()
Using Com As New SqlCommand("Select * From tablename", Con)
Using RDR = Com.ExecuteReader()
If RDR.HasRows Then
Do While RDR.Read
txtName.Text = RDR.Item("Name").ToString()
Loop
End If
End Using
End Using
Con.Close()
End Using
You will have to swap out a few things, something similar to the following.
Here is an example, you will need to modify this to meet your goal, but this shows the difference.
I also recommend using a "Using" statement to manage the connection/reader. Also, a parameterized query.
Dim sConnection As String = "server=(local);uid=sa;pwd=PassWord;database=DatabaseName"
Dim objCommand As New SqlCommand
objCommand.CommandText = "Select * From tablename"
objCommand.Connection = New SqlConnection(sConnection)
objCommand.Connection.Open()
Dim objDataReader As SqlDataReader = objCommand.ExecuteReader()
If objDataReader.HasRows Then
Do While objDataReader.Read()
Console.WriteLine(" Your name is: " & Convert.ToString(objDataReader(0)))
Loop
Else
Console.WriteLine("No rows returned.")
End If
objDataReader.Close()
objCommand.Dispose()
Dim rdrDataReader As SqlClient.SqlDataReader
Dim cmdCommand As SqlClient.SqlCommand
Dim dtsData As New DataSet
Dim dtbTable As New DataTable
Dim i As Integer
Dim SQLStatement as String
msqlConnection.Open()
cmdCommand = New SqlClient.SqlCommand(SQLStatement, msqlConnection)
rdrDataReader = cmdCommand.ExecuteReader()
For i = 0 To (rdrDataReader.FieldCount - 1)
dtbTable.Columns.Add(rdrDataReader.GetName(i), rdrDataReader.GetFieldType(i))
Next
dtbTable.BeginLoadData()
Dim values(rdrDataReader.FieldCount - 1) As Object
While rdrDataReader.Read
rdrDataReader.GetValues(values)
dtbTable.LoadDataRow(values, True)
End While
dtbTable.EndLoadData()
dtsData.Tables.Add(dtbTable)
msqlConnection.Close()
Return dtsData