1. SDK
2. Pull
3. Related Attributes
4. DeleteDeviceData

DeleteDeviceData

Function

Objective

The function is used to delete the data (for example, user information and time segment) on the device.

Parameter description

[in]: The handle that is returned when the connection is successful.

[in]: Data table name. Attached table 4 lists the available data tables.

[in]: Data record; the data is expressed in a text format; the multiple records are separated by \r\n, and the “Field=Value” pairs are separated by \t.

[in]: The default value is null; it is used for extension.

Returned value

When the returned value is 0 or a positive value, it indicates that the operation is successful. When the returned value is a negative value, it indicates that the operation fails. Attached table 5 lists the information about the error codes.

Example

table = “user” data = "Pin=2" # Conditions of deleting the data p_table = create_string_buffer(table) p_data = create_string_buffer(data) ret = self.commpro.DeleteDeviceData(self.hcommpro, p_table, p_data, "")

int ret = 0; string devtablename = "user"; string data = "Pin=2"; string options = ""; ret = DeleteDeviceData(h, devtablename, data, options);

    [DllImport("plcommpro.dll", EntryPoint = "DeleteDeviceData")]
public static extern int DeleteDeviceData(IntPtr h, string tablename, string data, string options);
private void DeleteDeviceData_Pull(string tablename = "user", string data = "1", string options = "")
    {
int ret = 0;
if (IntPtr.Zero != h)
        {
            ret = DeleteDeviceData(h, tablename, data, options);
if (ret >= 0)
                MessageBox.Show("The deleted operation succeed!");
else
                MessageBox.Show("The deleted operation failed!");
        }
    }

<DllImport("plcommpro.dll", EntryPoint := "DeleteDeviceData")> _
Public Shared Function DeleteDeviceData(h As IntPtr, tablename As String, data As String, options As String) As Integer
End Function
Private Sub DeleteDeviceData_Pull(Optional tablename As String = "user", Optional data As String = "1", Optional options As String = "")
Dim ret As Integer = 0
If IntPtr.Zero <> h Then
        ret = DeleteDeviceData(h, tablename, data, options)
If ret >= 0 Then
            MessageBox.Show("The deleted operation succeed!")
Else
            MessageBox.Show("The deleted operation failed!")
End If
End If
End Sub