Now, with C1Grid View for Wijmo, all of that is history.C1Grid View has the feature where users can edit cells on the client side itself.
Pessimistic concurrency, on the other hand, implements policies to ensure that concurrency violations cannot occur.This article is one in a series of articles on ASP. This type of behavior is known as "last write wins" and is the default behavior for web applications."Last write wins" is sufficient in applications where it is very rare for two users to be simultaneously working on the same data.At the same time, the other manager visits the page and sees the unit price below $5.00 and, noting store policy, decides to mark it as discontinued.He clicks the Edit button and starts to make his change. Will "Scott's Tea" be: The way the Sql Data Source control and Grid View work by default is to update all editable fields, regardless of whether they've been modified by the user or not. NET 2.0 introduced a number of new Web controls designed for accessing and modifying data.
These controls allow page developers to declaratively access and modify data without writing any code to perform the data access. ) Because multiple users can visit the same web page concurrently, it is possible for a user visiting a data modification page to inadvertently overwrite the modifications made by another user. If two users visit this page simultaneously from different computers and both edit the same row, whomever saves the first will have her changes overwritten by whomever saves the row last.
It is company policy to discontinue all items that have a unit price under $5.00.
Now, imagine that two managers visit this page at the same time from different computers and both notice that a the product "Scott's Tea" has a unit price under $5.00.
This means that we can be certain that the last scenario won't unfold.
Therefore, whatever manager clicks the Update button last will have his or her changes saved, overwriting the other's.
This blog explains how you can easily update the database with the modified values without any postback.