Hi friends,
I want your hlep.
In my application I want to display approx 64 k string data into a text
multiline textbox control.But I am not able to show data in text box getting
MemHandle Null error.following is the code snippet for method who take care
of creating memory handle .
static void SetFieldText( UInt16 fieldID, Char* textP )
{
// UInt32 j;
MemHandle newTextH, oldTextH;
FieldPtr fieldP;
fieldP = (FieldType*)GetObjectPtr( fieldID );
ErrNonFatalDisplayIf( !fieldP, "Invalid field identifier!" );
newTextH = MemHandleNew( StrLen( textP ) + 1 );
ErrNonFatalDisplayIf( !newTextH, "Out of memory!" );
StrCopy( MemHandleLock( newTextH ), textP );//
MemHandleUnlock( newTextH );
oldTextH = FldGetTextHandle( fieldP );
FldSetTextHandle( fieldP, newTextH );
FldDrawField( fieldP );
if( oldTextH )
MemHandleFree( oldTextH );
}
in above code MemHandleLock(newTextH ) methods gives above error and when I
debug my code that time I come to know that this is due to
MemHandleNew(StrLen( textP ) + 1) new method in above code which gives me 0
memhandle.
My test size which is to be display will vary from 1 k to max 64 k ,when it
is 6 or 7 k that time it works fine but when it goes more that 7.5 or 8 k
that time I am getting above error.
So I am sure that there must be some limit for getting memory handle for
particular length string.
I want to know that limit ..........
Please help me to solve this problem and also give me some alternative way
to do this.
Thanks and regards,
Ravi
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Nova Software, Mumbai, India
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