自己写一个函数:
function deletestr(str1:string;str2:string):string;
var
p,l1,l2:integer;
str:string;
begin
result:=str1;
l1:=length(str1);
l2:=length(str2);
p:=pos(str2,str1);
if p>0 then
result:=copy(str1,1,p-1)+copy(str1,p+l2,l1-p-l2+1);
end;
function dele_Str(substr, Str :string) :string ;
begin
if Pos(substr,Str) < 1 then
begin
Result := Str ;
end
else
begin
Result :=Result + dele_Str(substr, Copy(Str,1,Pos(substr,Str)-1)
+Copy(Str,Pos(substr,Str)+length(substr),Length(Str)-(Pos(substr,Str)+length(substr))) );
end ;
end ;
{$R *.dfm}
procedure TForm1.Button1Click(Sender: TObject);
begin
Label1.Caption :=dele_Str('123','1235888558123');
end;