I am using OLEDBDataReader to read from an Access database.
I have 4 data source where I get my data from, and each data source is in
its own thread.
When receiving data, if it is a new commodity I am need to read from the
database.
Since I can receive data from different data source at the same time, it is
possible that I read from the database at the same time.
During ExecuteReader sometimes I will get the error
"ExecuteRea der requires an open and available Connection. The connection's
current state is Open, Executing."
How can I fix this ?
This are my codes:
Dim dr As OleDb.OleDbData Reader
Dim cmd As New OleDb.OleDbComm and
sql = "select [Open],[High],[Low],[Last] from CommodityPrice where Commodity
= '" & sContract & "'"
With cmd
.Connection = g_ConnectionOLE
.CommandText = sql
Try
dr = .ExecuteReader( )
Catch ex As Exception
DBErr(bErr, bSuccess, ex, sCaller)
If bSuccess Then
cmd.Connection = g_ConnectionOLE
dr = cmd.ExecuteRead er()
End If
End Try
End With
1  4680 
fniles,
Each thread needs to open its own connection, select its data from the
database, and then close the connection.
Kerry Moorman
"fniles" wrote:
I am using OLEDBDataReader to read from an Access database.
I have 4 data source where I get my data from, and each data source is in
its own thread.
When receiving data, if it is a new commodity I am need to read from the
database.
Since I can receive data from different data source at the same time, it is
possible that I read from the database at the same time.
During ExecuteReader sometimes I will get the error
"ExecuteRea der requires an open and available Connection. The connection's
current state is Open, Executing."
How can I fix this ?
This are my codes:
Dim dr As OleDb.OleDbData Reader
Dim cmd As New OleDb.OleDbComm and
sql = "select [Open],[High],[Low],[Last] from CommodityPrice where Commodity
= '" & sContract & "'"
With cmd
.Connection = g_ConnectionOLE
.CommandText = sql
Try
dr = .ExecuteReader( )
Catch ex As Exception
DBErr(bErr, bSuccess, ex, sCaller)
If bSuccess Then
cmd.Connection = g_ConnectionOLE
dr = cmd.ExecuteRead er()
End If
End Try
End With
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