Shulou(Shulou.com)06/02 Report--

In this issue, the editor will bring you about the common properties and methods of the DataSet class of the ADO.NET dataset. The article is rich in content and analyzes and describes for you from a professional point of view. I hope you can get something after reading this article.

DataSet is the main component of the ADO.NET structure, which is the in-memory cache of data retrieved from the data source. DataSet consists of a set of DataTable objects that you can associate with DataRelation objects. You can also implement data integrity in DataSet by using UniqueConstraint and ForeignKeyConstraint objects.

Public attributes:

1.CassSensitive this property is used to get or set a value indicating whether string comparisons in the DataSet object are case-sensitive.

2.DataSetName this property is used to get or set the name of the current DataSet object.

3.DefaultViewManager this property is used to get a custom view of the data contained in a DataSet object to allow filtering, searching, and navigation using a custom DataViewManager object

4.EnforceConstraints this property is used to get or set a value indicating whether constraint rules are followed when attempting to perform any update operation

5.ExtendedProperties this property is used to get a collection of custom user information related to the DataSet object

6.HasErrors this property is used to get a value indicating whether there is an error in any DataTable object in this DataSet

7.Locale this property is used to get or set locale information used to compare strings in a table.

8.Prefix this attribute is used to get or set a XML prefix that is an alias for the DataSet namespace

9.Relations this property gets a collection of relationships used to link tables and allow browsing from parent tables to child tables

10.Tables this property is used to get the collection of tables contained in the DataSet object

Public methods:

1.AcceptChanges () this method commits all changes made to the DataSet object since the DataSet was loaded or the AcceptChanges () method was last called

2.Clear () this method is used to clear the DataSet of any data by removing all rows from all tables

3.Clone () this method is used to copy the structure of DataSet, including all DataTable schemas, relationships, and constraints. Do not copy any data.

4.Copy () this method is used to copy the structure and data of the DataSet object

5.GetChanges () this method is used to get a copy of the DataSet object that contains all changes made to the dataset since it was last loaded or since the AcceptChanges () method was called

6.GetXml () this method returns the XML representation of the data stored in the DataSet object

7.GetXmlSchema () this method returns the XSD schema in the XML representation of the data stored in the DataSet object

8.HasChanges () this method is used to get a Boolean value indicating whether the DataSet object has changed, including new rows, deleted rows, or modified rows

9.InferXmlSchema () this method is used to apply XML schemas to DataSet objects

10.Merge () this method is used to merge an array of specified DataSet, DataTable, or DataRow objects into the current DataSet or DataTable object

11.ReadXml () this method is used to read XML schemas and data into DataSet objects

12.ReadXmlSchema () this method is used to read XML schemas into DataSet objects

13.RejectChanges () this method is used to roll back all changes made to the DataSet object since it was created or since the last call to the AcceptChanges () method.

14.Reset () this method is used to reset the DataSet object to its initial state. Subclasses should override the Reset object to restore the DataSet object to its original state

15.WriteXml () this method is used to write XML data from DataSet objects, and optionally to write schemas

16.WriteXmlSchema () this method is used to write DataSet structures in the form of XML schemas

DataSet can read and write data and schemas as XML documents. Data and schemas can be transferred over HTTP and used by any application on any platform that supports XML. You can use the WriteXmlSchema method to save the schema as a XML schema, and you can use the WriteXml method to save the schema and data. To read an XML document that contains both schema and data, use the ReadXml method.

These are the common properties and methods of the DataSet class of the ADO.NET dataset shared by the editor. If you happen to have similar doubts, please refer to the above analysis to understand. If you want to know more about it, you are welcome to follow the industry information channel.

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