Code example for SQL DB connection can't be compiled

2 posts, 1 answers
  1. algot
    algot avatar
    57 posts
    Member since:
    Nov 2011

    Posted 28 Dec 2011 Link to this post

    I try to use following code from example
    SqlConnection thisConnection = new SqlConnection("Data Source=.\\sqlexpress; Initial Catalog=myFirstDB; Integrated Security=true;");
    //We define a new SQL connection with a connection string. 
    //The connection string will be different depending on your usecase and the name of the Database, table etc.
    //If you don't know how to write a connection string please look for tutorials on the Internet
    //Wrie the name of the database to the Log
    SqlCommand thisCommand = thisConnection.CreateCommand();
    //Create an SQL command
    thisCommand.CommandText = "SELECT test FROM MyFirstTable";
    //This is a simple SQL command that will go through all the values in the "test" column from table "MyFirstTable"
    //The SQL command will vary depending on your usecase. 
    //If you don't know how to write SQL commands please look for tutorials on the Internet                   
    SqlDataReader thisReader = thisCommand.ExecuteReader();
    //Create SQL reader
    while (thisReader.Read()) {
    //Loop to go through the entire column
        //Write each value to the log
        //You can implement you own custom logic here
        Log.WriteLine("Value of test column:" + thisReader("test"));
    //Close Reader
    //Close connection to SQL database
    But compilation error occurs:
    'thisReader' is a 'variable' but is used like a 'method'
    for this statement
    Log.WriteLine("Value of test column:" + thisReader("test"));
    What I did wrong? Or is there the error?
  2. Answer
    Stoich avatar
    1 posts

    Posted 28 Dec 2011 Link to this post

    Hello Alexander,
    you're right - that was a mistake on my part. You should use these type of brackets '[' because we're using indexing (not sure if that's the correct term) to access the value. So the code should look like this:
    Log.WriteLine("Value of test column:" + (String) thisReader["test"]);

    I've fixed the code sample on the page. Thank you for your feedback no this, 100 Telerik points added to your account.

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