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    Updating excel using ado net

    The idea behind connection pooling is simple - instead of incurring a large amount of overhead each time a connection to database server is established and closed, once a connection has been opened, it remains open for the lifetime of the process, available to be used again if needed.

    Pooling database connections can significantly enhance the performance and scalability of your application. NET data providers automatically pool connections for you.

    When you click on the Update Drop Downs button, the VBA code uses the “Data” worksheet as a table and then finds unique values for Products, Region and Customer Types and then populates them as List Items for the Combo Box controls.

    Example for Products drop down What is important to notice here is how the Table and Fields have been identified using square brackets unlike traditional SQL where we just provide the name, also the table name has to be suffixed with a $ symbol at the end.

    We'll be covering connecting to a SQL Server database, executing queries, calling stored procedures, filtering data, and reflecting changes in a database - and point you in the direction of further resources for more in-depth discussions on particular topics.

    I've provided code in both VB and C# if there are any major syntatical differences, and the rest in C#.

    student ID, student Name, student Address and in a single data table we can store data for specific topic.

    Like to store student's records you can have students data table, For school accounts you can have accounts data table, For school results you can have results data table.

    Starting at row 16 the column names are: Attendee First Name, Attendee Last Name, Attendee PTIN, Program Number, CE Hours Awarded Program, Completion Date This is how I am attempting to write to excel This is frustrating because I pull each field directly from the column name as gotten by col Names[i] = String. You haven't set the Update Command property of clients Adapter. I see it set for the Insert, take a look at this Stack Over Flow posting and see if this helps you stackoverflow.com/questions/10535663/…We will also use another SQL statement to populate the top right hand side table for calls data when all the 3 drop downs have some options selected.We need to add a reference to the Microsoft Active X Data Objects Library to be able to use the worksheet as a database table. I usually select the most recent version, however if you are developing a product it will be best suited if you are familiar with the operating system and office version used by the end-user’s system and accordingly select the best version available.Often I have thought, if I could have write “Select Employee Name From Sheet Where Employee ID=123” and use this on my excel sheet, my life would be simpler. People spend a lot of time thinking whether to use Excel as their database or not.Eventually they start using Access or SQL Server etc.

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