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TIBCO Rendezvous® 8.8.0

# Message.RemoveField

Method

## Visual Basic

    Overloads Public Sub RemoveField(
        ByVal messageField As MessageField)
    Overloads Public Sub RemoveField(
        ByVal fieldName As String)
    Overloads Public Sub RemoveField(
        ByVal fieldName As String,
        ByVal fieldId As UInt16)

## C#

    public void RemoveField(
        MessageField messageField );
    public void RemoveField(
        string fieldName );
    public void RemoveField(
        string fieldName,
        ushort fieldId );

## Purpose

Remove a field from a message.

Parameter | Description
``messageField`` | The parameter is a message field object, which specifies either the field name, the field identifier, or both; see MessageField.
``fieldName`` | Remove the field with this name.
``fieldId`` | Remove the field with this identifier. `MessageField.NoSpecificId` (zero) is a special value that signifies no identifier.

## Field Search Algorithm

This method uses this algorithm to find and remove a field within a message, as specified by a field identifier and a field name.

Procedure

| 1. | If the program supplied `MessageField.NoSpecificId` (zero) as the identifier, or omitted any identifier, then begin at step 3.

If the program supplied a non-zero field identifier, then search for the field with that identifier. If the search succeeds, remove the field and return.

On the search does not find a field, continue to step 2.

| 2. | If the identifier search (in step 1) fails, and the program supplied a non-null field name, then search for a field with that name.

On the search does not find a field, or if the program supplied null as the field name, throw an exception with the status code `NotFound.`

If the name search succeeds, but the actual identifier in the field is non-zero (so it does not match the identifier supplied) then throw an exception with the status code `IDConflict.`

If the search succeeds, remove the field and return.

| 3. | When the program supplied `MessageField.NoSpecificId` (zero) as the identifier, or omitted any identifier, then begin here.

Search for a field with the specified name—even if that name is null.

If the search succeeds, remove the field and return.

If the search does not find a field, throw an exception with the status code `NotFound.`

If a message contains several fields with the same name, searching by name removes the first instance of the field with that name.

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