C Sharp :: Searching With Multiple Textboxes?

So I've got a button that has to use 2 textboxes to search for 2 columns in my database.

 private void btnFilter_Click(object sender, EventArgs e) {
            SQLiteDataAdapter adap = new SQLiteDataAdapter("select * from Test", GetConnection());  
            DataSet ds = new DataSet();
            adap.Fill(ds);
            dgvTable.DataSource = ds.Tables[0];  

[Code] ....

My Current code for it.

The GetConnection(); and the CloseConnection(); Methods are just making a new connection and closing that connection, if needed I can post that code too later.

But basically, It only "filters" 1 textbox but if I say I want to search the Channel and the Log in which it is in, it doesn't search anything and returns all data in the database.