sap rfc调用时判断连接状态(找了1天,郁闷啊)
代码中出现了一个常数tloRfcConnected,在vb6.0中可用,可是在vb.net中不可用,到底这个是什么意思哪,如下是sap的解释:Connection Property: IsConnected
Purpose
Checks the current status of the Connection object and the R/3 connection.
Returns
type String.
Description
Use this property after the Logon method has returned FALSE. All valid values for the IsProperty property are given in the RfcConnectionStatus table: RfcConnectionStatus values
Logon method has returned FALSE. All valid values for the IsProperty property are given in the RfcConnectionStatus table: RfcConnectionStatus values
tloRfcNotConnected= 0
The R/3 connection is not established, Logon was not called, or Logoff has been called.
tloRfcConnected = 1
The R/3 connection is established.
TloRfcConnectCancel= 2
The R/3 connection is not established due to the fact that the user pressed the Cancel Button during Logon.
tloRfcConnectParameterMissing = 4
The R/3 connection could not be established, due to the fact that a silent logon was attempted with connection parameters.
TloRfcConnectFailed = 8
The R/3 connection failed. Call LastError to display additional information.
代码示例如下：
If m_cnnRFC.IsConnected <> 1 Then
ConnectState = False
Else
ConnectState = True
End If
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