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08-Jun-2019 02:12

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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.Here we will perform Select, Insert, Update and Delete operations on a COURSE table.Only one record should be returned to be updated and the WHERE query is based on the Attribute of the System tag. Not errors are caught, nor is the status label, but the Save is carried out (though no changes are made). Am I going completely the wrong way or am I just missing something? Thanks in advance, Nate Hi indieboynate , XDocument doc = XDocument. Map Path("XMLFile16.xml")); var eles = from c in doc. For files the database connection string is defined in the web.config file as: We can use a connection string from the web.config file or we can pass a connection string as a parameter in the constructor of the Data Context class to create an object of the Data Context class.The SELECT Operation Conculsion To perform select, insert, update and delete operations we create a table and create a data context class; in other words a dbml file.For example the Update, Insert and/or Get might be in some sort of repository class.The Create Customer Log and Update Customer Log might be at the higher level, maybe your UI level as it interacts directly with the UI elements.

Below are the first three parts of my LINQ to SQL series: In today's blog post I'll cover how we we can use the data model we created earlier, and use it to update, insert, and delete data.

operations in LINQ to SQL by adding, changing, and removing objects in your object model. Orders[0]; // Removing it from the table also removes it from the Customer’s list.

By default, LINQ to SQL translates your actions to SQL and submits the changes to the database.

Map Path("XMLFile16.xml")); Try Dim xml Doc As XDocument = XDocument. Map Path("..\Know All.xml")) Dim eles = From c In xml Doc.

Text = "Data successfully added." Catch ex As Exception lbl Status.

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.



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