Get number of columns in SqlDataReader

 
Imports System
Imports System.Data
Imports System.Data.SqlClient


public class MainClass
   Shared Sub Main()
      Dim thisConnection As New SqlConnection("server=(local)\SQLEXPRESS;" & _
          "integrated security=sspi;database=MyDatabase")

      'Sql Query 1
      Dim sql As String ="SELECT  FirstName, LastName FROM Employee;  "

      'Create Command object
      Dim thisCommand As New SqlCommand _
         (sql, thisConnection)

      Try
         ' Open Connection
         thisConnection.Open()
         Console.WriteLine("Connection Opened")

         ' Execute Query
         Dim thisReader As SqlDataReader = thisCommand.ExecuteReader()


         ' Get number of columns
         Console.WriteLine()
         Console.WriteLine("Number of columns in a row: {0}", _
            thisReader.FieldCount)


         'Close DataReader
         thisReader.Close()

      Catch ex As SqlException
         ' Display error
         Console.WriteLine("Error: " & ex.ToString())
      Finally
         ' Close Connection
         thisConnection.Close()
         Console.WriteLine("Connection Closed")

      End Try
   End Sub
End Class

Related examples in the same category

1.	Use SqlDataReader.Read to read result set
2.	From SqlDataReader get Column Name
3.	Format data when reading the data from SqlDataReader
4.	Get info about each column: Name, Ordinal and FieldType
5.	Get data from SqlDataReader by Data type
6.	Use column name to index data
7.	Employee Table Metadata

Get number of columns in SqlDataReader : SqlDataReader « Database ADO.net « VB.Net

Related examples in the same category