sqlcommand

everyone I am a student and new to .NET and specially MVC3 development but for one of my project I’ve to work over it and so going through the learning phase Issue and confusion I am facing is regarding DB-Connectivity, whast I leanree d regarding retrieving records from a database is something like this: //Method One: var conn = new SqlConnection(conString.ConnectionString); const string cmdString = "Select * FROM table"; var cmd = new SqlCommand(cmdString, conn); var mySqlDataAdapter = new SqlDataAdapter(cmd); mySqlDataAdapter = new SqlDataAdapter(cmd); mySqlDataAdapter.Fill(myDataSet,

I have seen this show up several places in code, never with an explanation, just a cryptic comment above it (Declaration and execution included for an idea of context. It's just a standard procedure of running a SqlCommand): //SqlCommand cmd = new SqlCommand(); //cmd.ExecuteReader(); //Read off the results //Cancel the command. This improves query time. cmd.Cancel (); Basically, after finishing a query, it goes back and cancels it, claiming some performance boost. I suppose you might get some memory back when it goes and frees up the XmlReader, but usually it's about to go out of scope anyways

Is it necessary to separately dispose of a SqlConnection as well as a SqlCommand? I'm doing some maintenance work on an application and found the following code: public void CallStoredProc(string storedProcName) { using (SqlCommand command = new SqlCommand(storedProcName, CreateConnection())) { command.CommandType = CommandType.StoredProcedure; command.Connection.Open(); // Additional code here. command.ExecuteNonQuery(); } } Will this clean up the SqlConnection properly, under normal circumstances as well as if there is an error? Or would we have to alter the code to something like: public

With little help of you I made this two QUERY . I posted pictures so you can see that in green squares are empty values which I would like to see and in red squares are values which I wouldnt like to display. Variable vyberradek inserts values for 'subkey' it is INT in DB but I pass it through string . So I will simplify: Now I can display all or a little, would you help me how to display the correct records? This first query does this: string sQuery = string.Format("SELECT zajsluz.akce,zajsluz.text,klisluz.pocet,klisluz.subkey,zajsluz.ID FROM zajsluz LEFT JOIN klisluz ON zajsluz.ID=klisluz

I have the following snippet of code in my WCF web service that builds a set of where conditions according to the formatting of the values of a provided dictionary. public static Dictionary<string, string>[] VehicleSearch(Dictionary<string, string> searchParams, int maxResults) { string condition = ""; foreach (string key in searchParams.Keys) { //Split out the conditional in case multiple options have been set (i.e. SUB;OLDS;TOY) string[] parameters = searchParams[key].Split(';'); if (parameters.Length == 1) { //If a single condition (no choice list) check for wildcards and use a LIKE if

when I enter this INSERT INTO works_on (essn, pno, hours) values ('123456789', 1, 32.5), ('123456789', 2, 7.5), ('666884444', 3, 40.0), ('453453453', 1, 20.0), ('453453453', 2, 20.0), ('333445555', 2, 10.0), ('333445555', 3, 10.0), ('333445555', 10, 10.0), ('333445555', 20, 10.0), ('999887777', 30, 30.0), ('999887777', 10, 10.0), ('987987987', 10, 35.0), ('987987987', 30, 5.0), ('987654321', 30, 20.0), ('987654321', 20, 15.0), ('888665555', 20, 0); I get the follow error ORA-00933: SQL command not properly ended In Oracle, you can't specify multiple sets of values like this (I'm guessing that