I am playing around trying to learn how to manipulate data in VB 2005. I
have code set to open up two db connections and pull in select data. Now
what I need to do is loop through table 1, field 1 and compare it to table 2,
field 2 and do some logical processing if the value exists.. I think I need
to use a While / for loop but not sure where to add it in. Basically I want
to look at table 1, field 1 compare it to table 2, field 2 and , if it does
not exist, write it to a file. If it does exist then continue on to the next
record.
Here is my code so far:
Imports Microsoft.SqlServer
Imports System
Imports System.Data
Imports system.Data.SqlClient
Public Class Form1
Private Sub btnProcess_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles btnProcess.Click
Dim connection As New
System.Data.SqlClient.SqlConnection("Server=VISTAD AN;Database=BlueForceImport;Trusted_Connection=Tru e")
Dim connection2 As New
System.Data.SqlClient.SqlConnection("Server=Portal ;Database=SLDemoApp60;Trusted_Connection=True")
' Create a SqlDataAdapter for the Employee table.
Dim EmployeeAdapter As SqlDataAdapter = New SqlDataAdapter()
' A table mapping names the DataTable
EmployeeAdapter.TableMappings.Add("Table", "tblEmployees")
' Open the Connection
connection.Open()
MsgBox("SQLConnection1 is open.")
' Create a SQLCommand to retrieve Employee Data
Dim EmployeeCommand As SqlCommand = New SqlCommand("SELECT * FROM
tblEmployees;", connection)
EmployeeCommand.CommandType = CommandType.Text
' Set the SqlDataAdapter's SelectCommand.
EmployeeAdapter.SelectCommand = EmployeeCommand
' Fill the DataSet.
Dim NewEmployees As DataSet = New DataSet("Employees")
EmployeeAdapter.Fill(NewEmployees)
' Create a SqlDataAdapter for the old Employee table.
Dim OldEmployeeAdapter As SqlDataAdapter = New SqlDataAdapter()
' A table mapping names the DataTable
OldEmployeeAdapter.TableMappings.Add("Table", "PJEMPLOY")
' Open the Connection
connection2.Open()
MsgBox("SQLConnection2 is open.")
' Create a SQLCommand to retrieve Employee Data
Dim OldEmployeeCommand As SqlCommand = New SqlCommand("SELECT * FROM
PJEMPLOY;", connection2)
OldEmployeeCommand.CommandType = CommandType.Text
' Set the SqlDataAdapter's SelectCommand.
OldEmployeeAdapter.SelectCommand = OldEmployeeCommand
' Fill the DataSet.
Dim OldEmployees As DataSet = New DataSet("OldEmployees")
OldEmployeeAdapter.Fill(OldEmployees)
connection.Close()
MsgBox("SQLConnection1 is closed.")
connection2.Close()
MsgBox("SQLConnection2 is closed.")
End Sub
End Class