如何设置“*”+ Sum（Fields！Barnumber.Value，" DataSet1"）+" *"表达

大家好，

如果你能帮助我，我需要一些帮助。我正在创建RDL报告并在其上放置条形码（free3 of 9 font）但我必须设置数字的第一个和结尾符号，因此条形码阅读器可以读取它像

* 1234 *

我知道值的字符串用于

Hi everyone,
I need some help if you could please help me. I'm creating RDL reports and puting Barcode on it with (free3 of 9 font) but I have to set the first and end of numbers star symbol so barcodereader can read it like
*1234*
I know the value is string is used like

="*"+First(Fields!FirstName.Value,"DataSet1"+"*")// this one works fine

但是有了整数值它会给出错误

but with integer value it give error

="*"+sum(Fields!CustomerId.Value, "DataSet1")+"*"// in here it won't work

所以任何帮助都会如此受到赞赏..........

so any help will be so appreciated..........