DBChart画line的问题 ( 积分: 50 )

要在dbchart1上画线，横坐标是时间００：００：００开始到２３：５９：５９结束，纵坐标是温度
with datamodule2do
begin
query1.close;
query1.sql.clear;
query1.sql.text:='select user.username,data.datatime,data.temperature from user inner join data on user.add=data.add where user.username='''+DBComboBOx1.text+''' and cast(data.datatime as char(10))='''formatdatetime('yyyy-mm-dd',datetimepicker1.date)+'''';
try
query1.open;
except
query1.execsql;
end;
while not datamodule2.query1.isemptydo
begin
dbchart1.series[0].datasource=datamodule2.query1;
dbchart1.series[0].active:=true;
dbchart1.series[0].addxy(datamodule2.query1.fields[1].asdatetime,datamodule2.query1.fields[2].asinteger,'',clred);
datamodule2.query1.next;
end;
end;
end;
怎么dbchart1一点反映都没有呢，高手帮看看，就这点分了，求大家了

要在dbchart1上画线，横坐标是时间００：００：００开始到２３：５９：５９结束，纵坐标是温度
with datamodule2do
begin
query1.close;
query1.sql.clear;
query1.sql.text:='select user.username,data.datatime,data.temperature from user inner join data on user.add=data.add where user.username='''+DBComboBOx1.text+''' and cast(data.datatime as char(10))='''formatdatetime('yyyy-mm-dd',datetimepicker1.date)+'''';
try
query1.open;
except
query1.execsql;
end;
while not datamodule2.query1.isemptydo
begin
dbchart1.series[0].datasource=datamodule2.query1;
dbchart1.series[0].active:=true;
dbchart1.series[0].addxy(datamodule2.query1.fields[1].asdatetime,datamodule2.query1.fields[2].asinteger,'',clred);
datamodule2.query1.next;
end;
end;
end;
怎么dbchart1一点反映都没有呢，高手帮看看，就这点分了，求大家了

不懂

接受答案了.

dbchart1.series[0].datasource=datamodule2.query1;
这个地方把'='换成:=