i want to know how to recognize null values or not required fileds when fileds are empty for example: u have 2 textboxes name and id ,one time u want to select DB all of members that they have no id (it means in search fields id is null field----select name, id from t1 where id = null) another time u need to select members that their id is blank----(select name from t1 where id = '';) thanks again

I have a Winform with some textboxes and comboboxes to search values from sqlserver, i need to recognize when my fields are empty and users dont input anything and by mean they dont need fields,and i have to know they dont want a field or this field is a null i am looking for the best way to handle null values in textboxes and comboboxes in c# thanks

HI i write two application with C#. at now i want to create an interaction between them. what is best way to do this (create interaction between 2 application) ? can we do this with interfaces ?

Hi,i want to know that how can i get schedule back up from server to local ?? for example : i have a database ("testDB")in the server ( www.server.com) then i need get backup every day and transfer all new data to my PC in (localhost ). thanks.

Hi.Thanks Can you Write Example Code For me?? I cant Run that method for my aim. my aim: string nameClass = "Class1"; Class1 { .... } nameClass newInstance = new nameClass(); how can i write this code with activator?? best regards.

Can I create a class from a string name?? I want to Make a new instanc class from string name in C#. for example: string nameClass = "Class1"; Class1 { .... } nameClass newInstance = new nameClass(); Thanks For Your Time.