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| Ado.Net Exception: access non-exist column exception |
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Imports System
Imports System.Data
Imports System.Data.SqlClient
public class MainClass
Shared Sub Main()
Dim SqlConnection1 As New SqlConnection("server=(local)\SQLEXPRESS;" & _
"integrated security=sspi;database=MyDatabase")
Dim thisCommand As SqlCommand = SqlConnection1.CreateCommand()
thisCommand.CommandText = "Select * from Employee"
Try
' Open connection
SqlConnection1.Open()
' Run command and get data as a reader
Dim thisReader As SqlDataReader = thisCommand.ExecuteReader()
' Access non-existent column
Dim str As String = thisReader.GetValue(20).ToString()
' Close data reader
thisReader.Close()
Catch ex As System.InvalidOperationException
Dim str As String
str = "Source : " & ex.Source
str &= ControlChars.NewLine
str &= "Exception Message : " & ex.Message
str &= ControlChars.NewLine
str &= "Stack Trace : " & ex.StackTrace
Console.WriteLine("Specific Exception:" & str)
Catch ex As System.Data.SqlClient.SqlException
Dim str As String
str = "Source : " & ex.Source
str &= ControlChars.NewLine
str &= "Exception Message : " & ex.Message
Console.WriteLine("Database Exception" & str)
Catch ex As System.Exception
Dim str As String
str = "Source : " & ex.Source
str &= ControlChars.NewLine
str &= "Exception Message : " & ex.Message
Console.WriteLine("Generic Exception" & str )
Finally
If SqlConnection1.State = ConnectionState.Open Then
Console.WriteLine("Finally block closing the connection")
SqlConnection1.Close()
End If
End Try
End Sub
End Class
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