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VB Code into VB.net confusion

Posted on 2009-05-08
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Last Modified: 2012-05-06
Hello experts,
I am in the process of rewriting a small VB 6.0 application into VB.net and I really dont understand the below code.

In the code below how can I do this part in VB.net Please help

Do While Not LocalRec.EOF
                If EroleIDs.Length > 0 Then EroleIDs += ","
                EroleIDs = +"'" + Trim(Str(LocalRec(0))) + "'"
                ERolesRec.MoveNext()
            Loop




LocalRec = New ADODB.Recordset
        ERolesRec = New ADODB.Recordset
        If LocalRec.State > 0 Then LocalRec.Close()
        LocalRec.Open("Select * from JobFilters where ID='" + JobID + "'", DB(DBOffset), adOpenForwardOnly, adLockOptimistic)
 
 
ERolesRec.Open("select id FROM TypeofTypes where typeid=73 and value like '*%'", db(NumConnections), adOpenForwardOnly, adLockOptimistic)
        EroleIDs = ""
        If Not ERolesRec.EOF Then
            Do While Not LocalRec.EOF
                If EroleIDs.Length > 0 Then EroleIDs += ","
                EroleIDs = +"'" + Trim(Str(LocalRec(0))) + "'"
                ERolesRec.MoveNext()
            Loop
        End If

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Question by:rowmark
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2 Comments
 
LVL 16

Expert Comment

by:ToddBeaulieu
ID: 24337394
EroleIDs appears to be a string variable. The intent of this loop is to build a comma delimitted list of id's .

So, the first recordset is a list of job filters for the current job (JobID variable).

Next it fetches a recordset from TypeofTypes that meet the typeif and value criteria shown.

It then clears the target list string and loops through all the rows in the job filters recordset. Before it does this, though it checks to make sure that Types were found via the EOF property. If there are some, it will enumerate the filters and for each one found, append the first column in the filter recordset. Since "*" is used, it's not possible to know what that column is from the given code. It proably ought to be tweaked to return the first column only, unless the others are used elsewhere now shown.

This code doesn't really look correct, though. If you notice the "do while" is enumerating the list of filters, but the "movenext" is advancing the TypeofTypes recordset. I can't see how this loop would EVER exit.
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LVL 14

Accepted Solution

by:
raja_ind82 earned 500 total points
ID: 24342703
i hope you got clear about the functionality. see the previous post.
Attached sample code in vb.net

Cheers,
M.Raja


Dim connString As String = ConfigurationManager.ConnectionStrings("ORACLE_LOCAL_DB").ConnectionString
        
Dim myConnection As New OleDb.OleDbConnection(connString)
 
Dim strQuery As String = "Select * from JobFilters where ID='" & JobID & "'"
  
 Dim strQuery2 As String = "select id FROM TypeofTypes where typeid=73 and value like '*%'"  
 
Dim myCommand As New OleDb.OleDbCommand(strQuery, myConnection)
Dim myCommand2 As New OleDb.OleDbCommand(strQuery2, myConnection)
 
 
 
myConnection.Open()
 
Dim myDataReader As OleDb.OleDbDataReader
Dim myDataReader2 As OleDb.OleDbDataReader
 
myDataReader = myCommand.ExecuteReader(CommandBehavior.CloseConnection)
myDataReader2 = myCommand2.ExecuteReader(CommandBehavior.CloseConnection)
					   
if myDataReader2.Read() then
 
Do While (myDataReader.Read())
 
 If EroleIDs.Length > 0 Then EroleIDs &= ","
	EroleIDs &= "'" & (myDataReader.Item(0).tostring + "'"
 
Loop
 
end if
 

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