Desarrollo ZKTeco

QueryState

Definition

VARIANT_BOOL QueryState([out] LONG *State)

Usage

Set the communication password of the PC. A connection can be set up only when the PC and the device use the same communication password.

Parameter

State:

Current state of the device. Values are as follows:

0 Waiting

1 Registering a fingerprint

2 Identifying a fingerprint

3 Accessing menu

4 Busy (doing other tasks)

5 Waiting for writing data into card

Return Value

Return True if it is successful, or return False.

Related Function

None

Ejemplo

C#

    /// <summary>
    /// Query the device's current state. Please refer to our development manual for more detailed parameters information.
    /// </summary>
    /// <param name="IP"> Ip of device </param>
    /// <param name="Port"> Port of Device </param>
    /// <param name="MachineNumber"> Device Number </param>
    private void QueryState(string IP = "10.0.0.44", int Port = 4370, int MachineNumber = 1)
        {
    //Create Standalone SDK class dynamicly.
            zkemkeeper.CZKEMClass axCZKEM1 = new zkemkeeper.CZKEMClass();
            axCZKEM1.Connect_Net(IP, Port);
    int idwErrorCode = 0;
    int State = 0;
    if (axCZKEM1.QueryState(ref State))
            {
                MessageBox.Show("Successfully!  QueryState=" + State.ToString(), "Success");
            }
    else
            {
                axCZKEM1.GetLastError(ref idwErrorCode);
                MessageBox.Show("Operation failed, ErrorCode=" + idwErrorCode.ToString(), "Error");
            }
        }

VB

''' <summary>
    ''' Query the device's current state
    ''' Please refer to our development manual for more detailed parameters information.
    ''' </summary>
    ''' <param name="State"></param>
    ''' <param name="IP"> Ip of device </param>
    ''' <param name="Port"> Port of Device </param>
    ''' <param name="MachineNumber"> Device Number </param>
    Private Sub QueryState(Optional State As Integer = 1, Optional IP As String = "10.0.0.44", Optional Port As Integer = 4370, Optional MachineNumber As Integer = 1)
    Dim idwErrorCode As Integer = 0
    'Create Standalone SDK class dynamicly.
    Dim axCZKEM1 As New zkemkeeper.CZKEM
        axCZKEM1.Connect_Net(IP, Convert.ToInt32(Port))
    If axCZKEM1.QueryState(State) = True Then
            MsgBox("The query state is=" & State, MsgBoxStyle.Information, "Success")
    Else
            axCZKEM1.GetLastError(idwErrorCode)
            MsgBox("Operation failed,ErrorCode=" & idwErrorCode.ToString(), MsgBoxStyle.Exclamation, "Error")
    End If
    End Sub