本文整理汇总了VB.NET中System.Data.SqlClient.SqlDataReader.GetOrdinal方法的典型用法代码示例。如果您正苦于以下问题：VB.NET SqlDataReader.GetOrdinal方法的具体用法？VB.NET SqlDataReader.GetOrdinal怎么用？VB.NET SqlDataReader.GetOrdinal使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类System.Data.SqlClient.SqlDataReader的用法示例。
在下文中一共展示了SqlDataReader.GetOrdinal方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的VB.NET代码示例。
示例1: ReadGetOrdinal
Private Sub ReadGetOrdinal(ByVal connectionString As String)
Dim queryString As String = _
"SELECT DISTINCT CustomerID FROM dbo.Orders;"
Using connection As New SqlConnection(connectionString)
Dim command As New SqlCommand(queryString, connection)
connection.Open()
Dim reader As SqlDataReader = command.ExecuteReader()
' Call GetOrdinal and assign value to variable.
Dim customerID As Integer = reader.GetOrdinal("CustomerID")
' Use variable with GetString inside of loop.
While reader.Read()
Console.WriteLine("CustomerID={0}", reader.GetString(customerID))
End While
' Call Close when done reading.
reader.Close()
End Using
End Sub示例2: MainClass
' 导入命名空间
Imports System
Imports System.Collections
Imports System.Data
Imports System.IO
Imports System.Xml.Serialization
Imports System.Xml
Imports System.Windows.Forms
Imports System.Data.SqlClient
Public Class MainClass
Shared Dim WithEvents con As SqlConnection
Shared Sub Main()
con = New SqlConnection("Server=(local)\SQLEXPRESS;Initial Catalog=MyDatabase;Integrated Security=SSPI")
Dim cmd As New SqlCommand()
cmd.CommandText = "SELECT * FROM Employee"
cmd.Connection = con
Try
con.Open()
Dim reader As SqlDataReader = cmd.ExecuteReader()
Dim OrderIDIdx As Integer = reader.GetOrdinal("ID")
'Dim OrderDateIdx As Integer = reader.GetOrdinal("FirstName")
'Dim OrderFreightIdx As Integer = reader.GetOrdinal("LastName")
Do
While reader.Read()
Dim OrderID As Integer = reader.GetInt32(OrderIDIdx)
'Dim OrderDate As DateTime = reader.GetDateTime(OrderDateIdx)
'Dim OrderFreight As Decimal = reader.GetDecimal(OrderFreightIdx)
'Console.WriteLine(OrderID & vbTab & OrderDate & vbTab & OrderFreight)
Console.WriteLine(OrderID & vbTab )
End While
Loop While reader.NextResult()
reader.Close()
Finally
con.Close()
End Try
End Sub
End Class