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Updating with linq

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LINQ to SQL offers maximum flexibility in manipulating and persisting changes that you made to your objects. As soon as entity objects are available (either by retrieving them through a query or by constructing them anew), you can change them as typical objects in your application. Contact Name = "New Contact"; // Create and add a new Order to the Orders collection. This way you can have a variety of ways that your object is created and the method is only responsible for the persistance of that object not also it's creation and populating.A couple of problems I see in your approach: // a method higher up the chain void Create Customer Log() void Update Customer Log(string application No) Data_Customer_Log Get Customer Log(string application No) Data_Customer_Log Insert Or Update(Data_Customer_Log record) Data_Customer_Log Insert(Data_Customer_Log record) Data_Customer_Log Update(Data_Customer_Log record) I would probably point out that these methods would probably be in different classes.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 Context Data file using the Object Relational Designer: Create a new item, select the LINQ to SQL classes (as shown in the following figure) and name it We just need to create a new object of corresponding database table type, then add it to the Data Context object and then commit the changes. If you want to insert more than one row, then you will have to create a ‘List’ array object containing all the ‘User’ objects and then use ‘Insert All On Submit‘ method, it will work fine.Here is a small block of c# code samples to create new ‘User’ linq to sql class(Representing ‘Users’ Table in Database) and add it to ‘Users Data Context’ class(Represents the database) and commit the changes to original database by ‘Submit Changes'(without this, no changes will be reflected to database): For your information, the above code example is for . If you are using an earlier version, you will have to use ‘Add‘ method instead of ‘Insert On Submit‘ . Deleting data/row from database using linq is as simple as inserting data and this is also sql syntax free operation 🙂 .

We can easily retrieve data from any object that implements the IEnumerable LINQ to SQL translates our actions to SQL and submits the changes to the database.

I'll also show how we can cleanly integrate business rules and custom validation logic with our data model.

In Part 2 of this series I walked through how to create a LINQ to SQL class model using the LINQ to SQL designer that is built-into VS 2008.

I would probably pass in the customer log as a parameter to the method and then have it deal with just the database insertion.

If you wanted to keep a Insert Or Update type of approach I would branch on perhaps something like the object ID if it has one.