Read Method

Reads specified number of bytes from serial port.

Syntax

Visual Basic .NET	Function Read(ByVal DataBuffer As System.IntPtr, ByVal BytesToRead As UInt32) As UInt32
Visual C#	UInt32 Read(IntPtr DataBuffer, UInt32 BytesToRead);

Parameters

DataBuffer

[out] Pointer to the buffer that receives the data. Use type-casting to convert it to void* or char*.

BytesToRead

[in] Number of bytes to read from serial port

Return

Number of bytes read from serial port.

Errors

The method may throw exception. Refer to Handle errors sample for details.

Remarks

In Visual Basic use function ReadArray.

Code Example

// using System.Runtime.InteropServices;

private void ftspcControl1_OnReceive(object Sender, uint Count)
{
	try
	{
		IntPtr Ptr = IntPtr.Zero;
		byte[] ReadBuffer = new byte[Count];
		Ptr = Marshal.AllocHGlobal((int)Count);
		ftspcControl1.Read(Ptr, Count);
		Marshal.Copy(Ptr, ReadBuffer, 0, (int)Count);
		TextBox_Data.Text =
			System.Text.Encoding.ASCII.GetString(ReadBuffer);
	}
	catch (FTSPCException E)
	{
		MessageBox.Show("Error " + E.ErrorCode.ToString() + "\r\n" + 
		E.ErrorSource, "Error", MessageBoxButtons.OK, 
		MessageBoxIcon.Error);
	}
}