Solved

VB Collection code equivalent in C#

Posted on 2009-04-07
6
407 Views
Last Modified: 2013-12-25
Can some expert provide me equivalet C# code from the below VB code. Thanks for your help in advance.





I have the following data in a table tempdata:
 
EmpNo		EmpName		DeptNo
1		Roger		1
2		Mike		1
3		Wayne		2
4		Whitney		3
5		Anne		3
 
Main.frm has following code
Private Sub Command1_Click()
    Dim oRS As ADODB.Recordset
    Dim oCn As ADODB.Connection
    Dim mDataBaseName  As String
    Dim oEmp As Class1
    Dim cEmp As Collection
    Dim iLoop As Integer
 
    Set oRS = New ADODB.Recordset
    Set oCn = New ADODB.Connection
    Set cEmp = New Collection
    
    mDataBaseName = App.Path & "\test.mdb"
    oCn.Open ("Provider=Microsoft.Jet.OLEDB.4.0;" & "Data Source=" & mDataBaseName & ";Jet OLEDB:Database Password=" & PWD & ";")
    oRS.CursorLocation = adUseClient
    oRS.Open "select * from tempdata", oCn
    
    Do While Not oRS.EOF
        Set oEmp = New Class1
        With oEmp
            .EmpNo = oRS.Fields("EmpNo").Value
            .EmpName = oRS.Fields("EmpName").Value
            .DeptNo = oRS.Fields("DeptNo").Value
        End With
        cEmp.Add oEmp
    Loop
 
    For iLoop = 1 To cEmp.Count
        With cEmp.Item(iLoop)
            Debug.Print .EmpNo, .EmpName, .DeptNo
        End With
    Next iLoop
    
    If oRS.State Then oRS.Close
    If oCn.State Then oCn.Close
    Set cEmp = Nothing
    Set oRS = Nothing
    Set oCn = Nothing
End Sub
 
class1.cls has following code:
 
Private mEmpNo As Integer
Private mEmpName As String
Private mDeptNo As Integer
 
Public Property Let EmpNo(vEmpNo As Integer)
    mEmpNo = vEmpNo
End Property
 
Public Property Get EmpNo() As Integer
    EmpNo = mEmpNo
End Property
 
Public Property Let EmpName(vEmpName As String)
    mEmpName = vEmpName
End Property
 
Public Property Get EmpName() As String
    EmpName = mEmpName
End Property
 
Public Property Let DeptNo(vDeptNo As Integer)
    mDeptNo = vDeptNo
End Property
 
Public Property Let DeptNo(vDeptNo As Integer)
    DeptNo = mDeptNo
End Property

Open in new window

0
Comment
Question by:shanvidhya
6 Comments
 
LVL 18

Expert Comment

by:philipjonathan
ID: 24093633
Something like this:
private void Command1_Click()
{
  List<Class1> cEmp = new List<Class1>();
 
  string mDataBaseName = App.Path + "\\test.mdb";
  string connectionString = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=" + mDataBaseName + ";Jet OLEDB:Database Password=" + PWD + ";";
  OleDbConnection oCn = new OleDbConnection(connectionString);
  oCn.Open();
 
  string cmdText = "select * from tempdata";
  OleDbCommand cmd = new OleDbCommand(cmdText, oCn);
  OleDbDataReader oRs = cmd.ExecuteReader();
 
  while (oRs.Read())
  {
    Class1 oEmp  = new Class1();
    oEmp.EmpNo   = (int) oRS["EmpNo"];
    oEmp.EmpName = (string) oRS["EmpName"];
    oEmp.DeptNo  = (int) oRS["DeptNo"];
    cEmp.Add(oEmp);
  }
 
  for (int iLoop = 0; iLoop < cEmp.Count; i++)
  {
    Class1 oEmp = cEmp[iLoop];
    System.Diagnostics.Debug.WriteLine(string.Format("{0} {1} {2}", oEmp.EmpNo, oEmp.EmpName, oEmp.DeptNo));
  }
 
  oRs.Close();
  oCn.Close();
}

Open in new window

0
 
LVL 6

Assisted Solution

by:HarryNS
HarryNS earned 25 total points
ID: 24094834
C# code for Class file:

using System;
 
public class class1
{
 
    int mEmpNo;
    string mEmpName;
    int mDeptNo;
 
    public int EmpNo
    {
        get { return mEmpNo; }
        set { mEmpNo = value; }
    }    
    public string EmpName
    {
        get { return mEmpName; }
        set { mEmpName = value; }
    }
    public int DeptNo
    {
        get { return mDeptNo; }
        set { mDeptNo = value; }
    }
 
}

Open in new window

0
 
LVL 26

Expert Comment

by:Anurag Thakur
ID: 24096853
0
3 Use Cases for Connected Systems

Our Dev teams are like yours. They’re continually cranking out code for new features/bugs fixes, testing, deploying, testing some more, responding to production monitoring events and more. It’s complex. So, we thought you’d like to see what’s working for us.

 

Author Comment

by:shanvidhya
ID: 24097400
philipjonathan,

I get an error in oRs part saying "The Name oRS do not exist in the current context" for
(int) oRS["EmpNo"];
(string) oRS["EmpName"];
(int) oRS["DeptNo"];

from the below part. Please advice.

while (oRs.Read())
  {
    Class1 oEmp  = new Class1();
    oEmp.EmpNo   = (int) oRS["EmpNo"];
    oEmp.EmpName = (string) oRS["EmpName"];
    oEmp.DeptNo  = (int) oRS["DeptNo"];
    cEmp.Add(oEmp);
  }


Thanks,
Shan
0
 
LVL 18

Accepted Solution

by:
philipjonathan earned 100 total points
ID: 24097634
Sorry, typo-error, should be oRs, instead of oRS (note the small letter s).


while (oRs.Read())
  {
    Class1 oEmp  = new Class1();
    oEmp.EmpNo   = (int) oRs["EmpNo"];
    oEmp.EmpName = (string) oRs["EmpName"];
    oEmp.DeptNo  = (int) oRs["DeptNo"];
    cEmp.Add(oEmp);
  }
0
 

Author Closing Comment

by:shanvidhya
ID: 31567837
Thanks Philipjonathan and Harry for providing me right solution. I am a VB developer moving to C#. Jonathan's last comment (upper and lower case typo problems) will help me to avoid more mistakes in future. You guys are great.
0

Featured Post

Master Your Team's Linux and Cloud Stack

Come see why top tech companies like Mailchimp and Media Temple use Linux Academy to build their employee training programs.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

When trying to find the cause of a problem in VBA or VB6 it's often valuable to know what procedures were executed prior to the error. You can use the Call Stack for that but it is often inadequate because it may show procedures you aren't intereste…
If you need to start windows update installation remotely or as a scheduled task you will find this very helpful.
As developers, we are not limited to the functions provided by the VBA language. In addition, we can call the functions that are part of the Windows operating system. These functions are part of the Windows API (Application Programming Interface). U…
Show developers how to use a criteria form to limit the data that appears on an Access report. It is a common requirement that users can specify the criteria for a report at runtime. The easiest way to accomplish this is using a criteria form that a…

813 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

16 Experts available now in Live!

Get 1:1 Help Now