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VB Collection code equivalent in C#

Posted on 2009-04-07
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417 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

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Question by:shanvidhya
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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();
}

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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; }
    }
 
}

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LVL 26

Expert Comment

by:Anurag Thakur
ID: 24096853
0
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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.
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