Hack gmail password without using any software key. Hacking Gmail or any other email account is no longer a rocket science. Further in this article you will learn some of the possible ways to hack Gmail account password in simple steps. With Gmail being one of the most widely used email services across the globe, it has also become a favorite place for many to engage in secret relationships and exchange cheating messages. Is it possible to hack anyone's Google Mail accounts without limit? GMail Password Decryptor – Pass Breaker is a small unobtrusive tool to decrypt all Gmail passwords. Find IDs of all your friends or family with this software.
Language Integrated 整體 Query (LINQ) is a component between the LINQ query and the actual data source which includes SQL Server, XML documents, Objects in memory etc. Linq to SQL provider can convert a Linq query to TSQL. LINQ to SQL LINQ to SQL translates our actions to SQL and submits the changes to the database. Here we will perform Select, Insert, Update and Delete operations on a COURSE table. Step 1: Create a COURSE Table in the database Step 2: Create a ContextData file using the Object Relational Designer: Create a new item, select the LINQ to SQL.
Introduction
LINQ to SQL is great as an ORM tool. It provides ease of access to data in our data oriented applications. It is also very easy to learn. In this article, we will be discussing about SET based operations for database operations using LINQ to SQL.
Background
Like many other ORMs, it is not very good with data insertion, manipulation, and deletion. Though it does allow all of these operations, all of these operations are not efficient in terms of the performance standpoint of applications involving large data manipulations. These operations are submitted to the database as soon as we call the submitChanges()
method of our DataContext
object. These are submitted as individual INSERT
, UPDATE
, or DELETE
statements for each record involved. You might notice these statements using SQL Profiler when the submitChanges()
method is called.
Since the system does not support bulk insertion, manipulation, or deletion out of the box, we need to provide this functionality ourselves.
Discussion
We know that LINQ to SQL supports Stored Procedures as a first class citizen through DataContext
. Like entities, we need to add the definition of the Stored Procedures to our DBMLs. The solution proposed here would use a Stored Procedure. This is not a generic solution, but would help in doing bulk operations with your database entities. Those who have been doing bulk database operations in .NET might have used similar solutions using datasets. This involves sending XML to the Stored Procedures and using OpenXML for applying SET based operations to our data.
To present the solution, let us create a table in the database. I am using SQL Server 2005. We are creating a table named TBL_TEST_TEST with two columns (ID
and Name
). Here, ID
is an identity column which is the primary key of the table.
We create a C# console project named TestIQueryable.csproj.
Now, we add a LINQ to SQL class item to our project, named Test.dbml.
Add a connection to your database in Server Explorer, and drop TBL_TEST_TEST to the LINQ to SQL designer for Test.dbml.
Now let us discuss about each operation separately.
Bulk Insert
Let us start with the insertion of bulk data in our database. We create a Stored Procedure in the database as follows:
As discussed earlier, we are passing XML data to this Stored Procedure in the nText
argument. We are using OpenXML to get data and insert into our table.
Now, we open the LINQ to SQL designer for adding this Stored Procedure to Test.dbml. Drag the Stored Procedure from Server Explorer to the tab of the designer set aside for Stored Procedures. Update the name of the Stored Procedure to some thing meaningful. https://dacoolscompsig1986.mystrikingly.com/blog/canoscan-lide-20-driver-windows-7-x64-lite. Aadade aadharam serial cast crew. We update the name to insertTestData
.
We open Program.cs and write some code to generate data. Add the following code to the Main
method of the Program
class:
You can see that we have neither used db.insertOnSubmit()
nor submitChanges()
. But we have generated data in an array of TBL_TEST_TEST
type objects provided by LINQ to SQL. After generating data in the array, we convert it to XML using XMLSerializer
. We pass this XML directly to the Stored Procedure using the DataContext
object.
Now finally, we are successful in inserting 50 rows of data in one shot to the database.
Bulk Updates
You might be more interested to learn about operations involving IQueryable
types. Let us create this Stored Procedure in the database:
We add the definition of this Stored Procedure to Test.dbml:
Sql Insert Or Update
You can remove the code written in Program.cs (Main
method). Add the following code:
In the above code, we have queried the database using the IQueryable
interface. After fetching data, we have updated it using a foreach
loop. We have serialized it to XML data, and have written it to StringBuilderObject sBuilder
. We have passed this data to the database using the Stored Procedure already added. This way, we achieve sending bulk data to our database for update.
Bulk Deletion
Now finally, we discuss about bulk deletion. This would be nearly the same solution. The difference is just that instead of updating, we will be deleting data. Let's attempt to delete all records from the database with the values of ID greater than 25.
Add the definition of this Stored Procedure to Test.dbml and rename it to deleteTestData
.
https://dacoolscompsig1986.mystrikingly.com/blog/add-a-blog-post-title. Computers are getting so fast now, latency isn't really an issue. Eh, not worth it IMO.
Like in the Update operation, update the code of the Main
method of Program.cs as follows:
History
- Article posted: 01/20/2010.
All,
Insert Update Delete
So I've got all my select queries in LINQ-to-SQL converted to using CompiledQueries to speed things up. Works great so far for select statements, but I haven't been able to figure out how to pre-compile insert, update, or delete statements.
Granted, when you're inserting, deleting or updating in LINQ-to-SQL, you have to use the object model. But obviously somewhere along the way it generates a query, which would be nice to pre-compile and store in a static member.
Is this possible? What is LINQ performance like for updates, deletes and inserts when its not pre-compiled? I could see it being a lot faster than the selects, because what they do underneath is a lot simpler and less 'dynamic'..
mat3 Answers
There is a big difference. Linq-To-SQL select queries can be large complex expressions trees. Its these that may take sometime 'compiling'. In this case coalescing to some T-SQL that can be run against a SQL Server. So it makes sense to cache the result of an operation so that it can be re-used.
However other Delete, Update, and Insert are simple operations that do not require an expression tree to be converted to T-SQL (LINQ itself is all about querying). Its just unfortunate that we've been trained to think of SQL code that performs these other operations as 'queries', we're not actuall asking for any info.
These operations are only defined by the DataContext not by LINQ hence the code to perform these functions is already compiled.
AnthonyWJonesAnthonyWJonesLinq To Sql Insert Update Delete C#
I think of the three only insert would make sense to be able to compile and re-use because delete is trivially simple (DELETE FROM Table WHERE Key..) and UPDATE only updates the fields that have changed and so varies per update operation.
Sql Update Delete
Linq To Sql Stored Procedures Insert Update Delete
[)amien
L2S uses 'sp_executeSQL' so after you run it the first time it will be in the stored procedure execution plan cache. Subsequent runs (of the same query - not same params) will reuse the compiled plan from the cache. So what you are asking for is automagically handled by SQL Server 'behind the scenes'.
KristoferAKristoferA