Must declare the scalar variable Error

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I have error on run time "Must declare the scalar variable Error"
how i can solve it ?

this is my function
---------------------

VB

Public Function executeUpdateQuery(ByVal _query As [String], ByVal OleDbParameter As OleDbParameter()) As Boolean
       Dim myCommand As New OleDbCommand()
       Try
           myCommand.Connection = openConnection()
           myCommand.CommandText = _query
           myCommand.Parameters.AddRange(OleDbParameter)
           myAdapter.UpdateCommand = myCommand

           myCommand.ExecuteNonQuery()



       Catch e As SqlException
           MsgBox("Error - Connection.executeUpdateQuery - Query: " & _query & " " & vbLf & "Exception: " & e.StackTrace.ToString())
           Return False
       End Try
       Return True
   End Function

Posted 18-Aug-13 1:26am

Ahmad Al Halabi

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Comments

Richard MacCutchan 18-Aug-13 7:29am

Show the values of the command and variables.

Ahmad Al Halabi 18-Aug-13 7:35am

My Error in "myCommand.ExecuteNonQuery()" >>
myCommand.ExecuteNonQuery() Run-time exception thrown : System.Data.OleDb.OleDbException - Must declare the scalar variable "@ImageData".

---------------------------------------------------------------------------
_query : update Company set CompanyLogo = (@ImageData) where CompanyID = 1
OleDbParameter : length=1
name =@ImageData
value={System.Array}
myCommand : update Company set CompanyLogo = (@ImageData) where CompanyID = 1

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Ahmad Al Halabi · Accepted Answer · 2013-08-18T07:35:00

Solution 1

I Found the Solution

SQL

Replace my named parameters with "?"
for example:
SELECT COUNT(*) FROM Account WHERE AccountID = ?

Posted 18-Aug-13 7:35am

Ahmad Al Halabi