ASP.NET GUIDELINES TO IMPROVE PERFORMANCE AND SECURITY

Posted Date: 08 Oct 2009	Resource Type: Articles	Category: ASP.NET/Web Applications
Author: Melchior	Member Level: Gold
Rating:	Points: 2

PERFORMANCE GUIDELINES
• Choose the collection type depends on the requirement
• Initialize collections to the right size when you can
• Manage the size of each object in collections
• Use arrays rather than collections
• Do not use exceptions to control application flow
• Use validation code to reduce unnecessary exceptions
• Use the finally block to ensure resources are released
• Replace ‘on error goto err’ with try/catch block
• Do not catch exceptions that you cannot handle
• Be aware that rethrowing is expensive
• Use tryparse method to avoid unnecessary exceptions
• Avoid repetitive field or property access
• Use of ‘+’ operator and stringbuilder
• Use compare method for case-insensitive string comparisons
SECURITY GUIDELINES
• Do not hard code connection strings
• Consider encrypting connection strings
• Do not log sensitive data
• Do not expose event log data to unauthorized users
• If you accept file names, validate them
• Limit file i/o operations using permissions
• Avoid hard coding your application's directory hierarchy
• Where possible, use securestring rather than system.string
• Validate sql input in sql commands
• Using parameters with stored procedures & dynamic sql
• Retrieve only the columns and rows you need
• Support paging over large result sets
• Use batch sql statements to reduce round trips
• Use primary keys and rows.find for indexed searching
• Use a dataview for repetitive non-primary key searches
• Open connections late and release them early
• Explicitly close connections
• Don’t open a connection during a single fill/update operation
• Pool connections
• Close datareader objects

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