TREEVIEW只输入表名,父ID,节点ID,节点名就得到树型结构之十二(转)

// Call the overload that takes an array of SqlParameters
return ExecuteScalar(connectionString, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
// Otherwise we can just call the SP without params
return ExecuteScalar(connectionString, CommandType.StoredProcedure, spName);
}
}

///
/// Execute a SqlCommand (that returns a 1x1 resultset and takes no parameters) against the provided SqlConnection.
///
///
/// e.g.:
/// int orderCount = (int)ExecuteScalar(conn, CommandType.StoredProcedure, "GetOrderCount");
///
/// A valid SqlConnection
/// The CommandType (stored procedure, text, etc.)
/// The stored procedure name or T-SQL command
/// An object containing the value in the 1x1 resultset generated by the command
public static object ExecuteScalar(SqlConnection connection, CommandType commandType, string commandText)
{
// Pass through the call providing null for the set of SqlParameters
return ExecuteScalar(connection, commandType, commandText, (SqlParameter[])null);
}

///
/// Execute a SqlCommand (that returns a 1x1 resultset) against the specified SqlConnection
/// using the provided parameters.
///
///
/// e.g.:
/// int orderCount = (int)ExecuteScalar(conn, CommandType.StoredProcedure, "GetOrderCount", new SqlParameter("@prodid", 24));
///
/// A valid SqlConnection
/// The CommandType (stored procedure, text, etc.)
/// The stored procedure name or T-SQL command
/// An array of SqlParamters used to execute the command
/// An object containing the value in the 1x1 resultset generated by the command
public static object ExecuteScalar(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
if( connection == null ) throw new ArgumentNullException( "connection" );

// Create a command and prepare it for execution
SqlCommand cmd = new SqlCommand();

bool mustCloseConnection = false;
PrepareCommand(cmd, connection, (SqlTransaction)null, commandType, commandText, commandParameters, out mustCloseConnection );

// Execute the command & return the results
object retval = cmd.ExecuteScalar();

// Detach the SqlParameters from the command object, so they can be used again
cmd.Parameters.Clear();

if( mustCloseConnection )
connection.Close();

return retval;
}

[@more@]

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转载于:http://blog.itpub.net/8781179/viewspace-924794/