Why is datatable disposable

Source code demonstrates how to use the DataTable object along with the SqlCommandBuilder class to add a new column and row into a table of the database. Add[drowEmployee ; sqldaAirSpeed. Update dtableEmployee ; dgvwEmployee. Table; dgvwEmployee. This class generates commands to update the table with the changes, made to the DataSet. The DataSet is filled with the records of Employee table. An instance of the DataTable class is created and is populated with the records of Employee table.

A new row is added to the table in the DataSet using the NewRow method. Finally , the new row is added to the table using the Update method of SqlDataAdapter class. The DataGridView control is used to display the records of the table in descending order of employee names. This is specified using the Sort property of DataGridView class. The class manages the tables using the Add , Remove and Clear methods.

Following are the properties, methods and events of DataTableCollection class. AddRange - This method copies the DataTable elements to the end of the collection. IndexOf - This method retrieves the index in the DataTable object collection. RemoveAt - This method removes the DataTable object from the specific index in the collection.

Source code demonstrate how to retrieve the table names existing in the DataTableCollection object. Add dtableIndex. This is normal, and by design: anything else would slow down the whole system.

Posted Aug pm OriginalGriff. Maciej Los Aug am. For example: C. Posted Aug am Maciej Los. Member Aug am. I have tried all these, but didn't help. The issue is when i get data from database and populate to datatable the memory increases rapidly and this doesn't decrease. If you're looking in Task Manager to see how much memory your app is using, it's lying to you. You're seeing the size of the managed heap your app has immediate access to.

When objects go out of scope, the. NET Garbage Collector deallocates the object and returns the memory back to the managed heap, not to Windows. Posted Aug am Dave Kreskowiak. Add your solution here. OK Paste as. Treat my content as plain text, not as HTML. Existing Members Sign in to your account. This email is in use. Do you need your password? Submit your solution!

When answering a question please: Read the question carefully. NET using C. View All. DataTable In C. Mahesh Chand Updated date Nov 08, Add method RejectChanges Reject all changed made after last AcceptChanges was called Reset Resets a data table's original state Select Gets an array of rows based on the criteria The DataTable class provides methods and properties to remove, copy, and clone data tables.

Add a DataGridView control to the Form and resize your control as you see it fits. The form constructor looks like listing 1. See the following code public class Form1 : System. Columns["id"]; custTable. Avenue, Bridgetown, PA"; custTable. GetType "System. Int32" ; dtColumn. String" ; dtColumn. DataSource dataGridView1. Add custTable ; Now, the last step is to add data to DataTable.

You add data using DataRow. Conclusion This article originally written in from my ADO. Next Recommended Reading. Windows 10 Vs Windows Visual Studio Vs Visual Studio Understanding Matplotlib With Examples. Understanding Numpy With Examples.