Hello! I've got a question that I hope an arduino teacher can help me out with.
how to display excel.csv data into lcd use SD cards as data storage.?
and how to display to lcd from each column excel.csv we need?
thanks.and please help
Break your project into small parts.
Do you know how to put a CSV file onto an SD Card?
Do you know the format of the data in your CSV file?
Have you something to connect an SD Card to your Arduino?
Have you written a short Arduino program to open a file on the SD Card, read its content and display it on the Arduino Serial Monitor?
Have you written a short Arduino program to display simple messages such as "Hello World" on your LCD display?
...R
Hi,
Welcome to the forum.
Please read the first post in any forum entitled how to use this forum.
http://forum.arduino.cc/index.php/topic,148850.0.html then look down to item #7 about how to post your code.
It will be formatted in a scrolling window that makes it easier to read.
Thanks.. Tom... 
You have not told us what the program in Reply #2 actually does, or what you want it to do differently.
If that was my project I would break it all up into small functions (such as your writeSD() ). Have a look at Planning and Implementing a Program
In particular I would read and save the state of all the buttons at the same time rather than scatter the reading throughout the program. And by saving the values you can use Serial.print() to let you know is they are what you expect.
Pins connected to buttons need either an external pullup or pulldown resistor or (much better) use the internal pullup resistor with pinMode(pin, INPUT_PULLUP); and wire the switch to connect the pin to GND when pressed.
...R
If you followed post #3 and read the how to use this forum, you would know that subject lines draw people who know about your needs. right now, only a very few (4 ?) people know you need help with a CSV file and an LCD.
if you go back to your first post and on te bottom right of the post, hit the more options screen, you can edit your first post and make the subject line say something about CSV files and LCD's.