Extracts data of type Byte from a blob variable.
GetByte ( blobvariable, n, b )
Argument |
Description |
|---|---|
blobvariable |
A variable of the Blob datatype from which you want to extract a value of the Byte datatype |
n |
Tthe number of the position in blobvariable at which you want to retrieve a value of the Byte datatype |
b |
Variable of the Byte datatype in which you want to store the returned data of type Byte |
Integer. Returns 1 if it succeeds or -1 if n exceeds the scope of blobvariable; it returns null if the value of any of its arguments is null.
If you want to get the value of the initial character in a blob, you can use the Byte function without using an argument defining the position of the character.
This example converts the text in a SingleLineEdit to a blob before obtaining the byte value of the character at the third position:
Int li_rtn
Byte lb_byte
Blob myBlob
myBlob = Blob (sle_1.text, EncodingUTF8!)
li_rtn = GetByte(myBlob, 3, lb_byte)
messagebox("getbyte", string(lb_byte))
