sqldatareader

Is there an easy way to convert all the columns of the current row of a SqlDataReader to a dictionary? using (SqlDataReader opReader = command.ExecuteReader()) { // Convert the current row to a dictionary } Thanks You can use LINQ: return Enumerable.Range(0, reader.FieldCount) .ToDictionary(reader.GetName, reader.GetValue); Easier than this?: // Need to read the row in, usually in a while ( opReader.Read ) {} loop... opReader.Read(); // Convert current row into a dictionary Dictionary<string, object> dict = new Dictionary<string, object>(); for( int lp = 0 ; lp < opReader.FieldCount ; lp++ ) {

I am trying to figure out how to check if my SqlDataReader is null or has no rows (meaning the reservation does not exist) and then display a messagebox. For some reason when I debug once it hits the While dr.Read()) code it steps out if it does not have a return result. I've tried putting this code in a few different locations but none seem to fire off the messagebox if no records are returned if (dr.GetValue(0) == DBNull.Value || !dr.HasRows) { MessageBox.Show("Reservation Number Does Not Exist","Error", MessageBoxButtons.OK, MessageBoxIcon.Asterisk); } else { (read records) } My code... try

I'm creating a booking management system and I am having problems trying to get data from a SQL database and insert into a group of textboxes of my application. I want to show the customer details, when a button is clicked, in a DataGridView, but when I click the button, the application throws an exception with the following error message; Invalid attempt to read when no data is present. I have attached a screenshot of the screen where I want to view customer details, and the code for the button, which will eventually show customer details in the respective textboxes. Any help would be greatly

Trying to see if it is beneficial to add an if (dr.HasRows) before the while (dr.read()) function. I mean, technically if it doesn't have rows it isn't going to read, so would it matter if you checked this first? using (SqlDataReader dr = cmd.ExecuteReader()) { if (dr.HasRows) { while (dr.Read()) { ....do stuff here } } } or is this going to essentially do the exact same thing if you're just making sure it has values to provide... using (SqlDataReader dr = cmd.ExecuteReader()) { while (dr.Read()) { ....do stuff here } } No..It is not mandatory to check (dr.HasRows) if the DataReader contains

I am creating an application for a asp.net class that I am taking. One of the pages in the application needs to allow a user to search for a specific student via last name or user ID. When the student is found the page should display the students data and his/her class schedule. I have gotten everything to work except for the class schedule. The approach I have taken (as we learned in class) was to get the query results via the SqlDataReader and bind it to a GridView. This is done in showStudentSchedule(). The query in this function returns the correct results when I test it against the DB I