Question

I new to C#, and trying to make a winform app, i am having problem to search a Database depending upon the text entered in a textbox.

I have added the gridview, when adding a new query, what should be the WHERE clause like to be able to use data from Winform controls?

Also do i need to change the fill table call ?

And is there any Good books that may cover a good amount of similar topic,i.e,working with databases in c# winforms?

Thank you all, in advance..

Answer 1

You should look into making a stored procedure for your query and then you supply the value from your textbox.Text field into your stored procedure.

This other question might help you with the C# syntax:
How to execute a stored procedure within C# program

And assuming you’re trying out SQL Server Express, this should help you setup the query as a stored procedure:
http://msdn.microsoft.com/en-us/library/ms345415.aspx

Otherwise if you’re going for basic SQL in the winForm, you likely want to run the query based on the user pressing a button rather than the “TextChanged” event on the TextBox:

String queryStr = "SELECT * "+
    "FROM my_table "+
    String.Format("WHERE my_value = '{0}'", TextBox1.Text);