login code for c#3.5 in wpf

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i have login label and password control and department label for that i want login code using dataset.
table name is login_tbl(login column, password column)

Posted 5-Jul-11 23:07pm

jayanthik

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Keith Barrow · Answer 1 · 2011-07-05T23:20:00

Please read the Site Guidance about asking a question, we do not provide code here when it is just doing someone else's work. In principle:

DO NOT store the plain text password, it is a huge security risk, and if the query is sent to a remote server the values can be intercepted on the network. Instead store a "salted hash" (google for this term) of the password and store the salt om the login table.

Use an SqlCommand (google for this, there are plenty of examples) to get the password and salt for the user ID, then check they match. There are other ways of getting the data out the database such as LINQ to SQL or the Entity Frameworkm, the principle remains the same and you should choose the technology most suitable for your purposes.