create strongly typed dataset from xml

... xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com :xml- msdata" xmlns:codegen="urn:schemas-microsoft-com :xml- msprop" attributeFormDefault="qualified" ... ] Recipe 2.19 Replacing Null Values in a Strongly Typed DataSet Problem When a column in a database has a null value, you want the value in the DataSet to be a string indicating that no ... annotations in the XML schema to control the handling of null values. The sample uses one XSD file: CategoriesDS_AnnotatedNull.xsd The schema used to generate the strongly typed DataSet. The schema...

Ngày tải lên: 14/12/2013, 18:16

... example form. Modifying Data Using a Strongly Typed DataSet In Chapter 10 , you saw how to create and use a strongly typed DataSet class named MyDataSet. You can use objects of this class ... and rows from that table. In this section, you'll see how to modify data using a strongly typed object of the MyDataSet class. Note One of the features of a strongly typed DataSet object ... form in the example project shows how to add, modify, and remove a row to a strongly typed DataSet object named myDataSet1. You can see the steps that accomplish these tasks in the following...

Ngày tải lên: 24/12/2013, 01:17

... Names Used in a Strongly Typed DataSet Problem You want to assign your own names to the classes and properties for strongly typed DataSet classes. Solution Use annotations in the XML schema to ... objects in a strongly typed DataSet and the default names and available annotations for each. Table 2-18. Default values and available annotations for elements of strongly typed DataSet objects ... classes and properties in strongly typed DataSet classes. The sample uses one XSD file: CategoriesDS_AnnotatedName.xsd The schema used to generate the strongly typed DataSet. The schema is annotated...

Ngày tải lên: 24/12/2013, 05:15

... 8.2 Saving and Loading a DataSet from XML Problem You need to save a DataSet as an XML file and create a DataSet from an XML file. Solution Use the XmlTextWriter and XmlTextReader classes. ... // Create an XmlTextReader using the file stream. XmlTextReader xtr = new XmlTextReader(fs); try { // Read the schema into the DataSet. DataSet ds = new DataSet( ); ds.ReadXml(xtr, ... on the form. Read Button.Click Creates a DataSet and reads in schema and data from a file containing a previously serialized XML. The XML is written from the DataSet to a stream and displayed....

Ngày tải lên: 24/12/2013, 05:15

Ngày tải lên: 21/01/2014, 07:20

Ngày tải lên: 21/01/2014, 11:20

... objects from a database. So let's move on to Chapter 16, where you'll learn to do the same with the strongly typed SQLData and CustomDatum interfaces. Chapter 16. Strongly Typed Object ... need to create a Statement or a PreparedStatement object to execute it. Since we formulated a SELECT statement for use with a Statement object, we'll create a Statement: stmt = conn.createStatement( ... PERSON_TYP object from the database. For example, to select a copy of Tim O'Reilly's Person object from the database, use the following SELECT statement: select value(p) from person_ot...

Ngày tải lên: 29/09/2013, 09:20

... objects—inherit from the ADO.NET disconnected classes allowing you to cast the DataRow to the strongly typed row. [ Team LiB ] [ Team LiB ] Recipe 3.11 Getting Typed DataRows from DataViews ... DataView to find rows in a typed DataSet, you want to convert the rows you find to typed DataRow objects having all the properties and methods defined in your typed DataSet. Solution Cast the ... a DataRowView to a typed DataRow. The sample code contains two event handlers: Form.Load Sets up the sample by creating a typed DataSet containing the Categories table from the Northwind...

Ngày tải lên: 24/12/2013, 05:15

Ngày tải lên: 21/01/2014, 07:20

... id="NewDataSet" xmlns="" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com :xml- msdata"> - <xs:element name="NewDataSet" ... <diffgr:diffgram xmlns:msdata="urn:schemas-microsoft-com :xml- msdata" xmlns:diffgr="urn:schemas-microsoft-com :xml- diffgram-v1"> - <NewDataSet xmlns=""> ... shown here in Listing 13.5. Listing 13.5 Dataset Sent Back as XML < ?xml version="1.0" encoding="utf-8" ?> - < ;DataSet xmlns="http://appsplus.com/webservices/">...

Ngày tải lên: 24/12/2013, 06:17

... look like this: SELECT * FROM Customers FOR XML RAW To execute the SQL statement in this case, you use the method ExecuteXMLReader. When you use this method, an XMLReader is returned. You ... retrieves data from SQL Server 2000 in an XML format. Click on the button labeled Retrieve XML, and the data will be listed in the TextArea at the bottom of the form (see Figure 12.4). 1. Create a ... Sometimes I have to pull data from my SQL Server database into an XML document format. How do I do that with SQL Server 2000? Technique To accomplish this task, you will create a Command object...

Ngày tải lên: 17/10/2013, 21:15

... 13.2 Create a Simple XML Web Service Using Parameters I have seen how to create a Web Service using the sample that Microsoft provides. This was instructive but not very useful. How do I create ... returned; otherwise, False is returned. 1. Create an ASP.NET Web service project, calling it SecurityWebService. 2. Highlight the default .asmx file created in the Solution Explorer, renaming ... going to create the start of a security Web Service. This security Web Service is going to take in two parameters: Login Name and Password. It will then check against a table that you will create...

Ngày tải lên: 20/10/2013, 13:15

... data grid on the form. Copy Button.Click Creates a destination DataSet and copies the schema and specified data into it from the source DataSet created in the Form.Load event handler. The ... of rows from the source to the destination table. Once the destination tables are created and the data is copied into them, the example shows how to create the DataRelation objects from the ... source DataSet in the destination DataSet. The sample code contains two event handlers: Form.Load Sets up the sample by creating a DataSet containing the Orders and Order Details tables from...

Ngày tải lên: 28/10/2013, 18:15

... Typically, the XML data packet includes a mixture of content: ! XML data created from user input ! XML data retrieved from XML data islands or XML documents Creating XML data from user input ... Posting XML Data from Client to Server Sending XML Data from Client to Server ! Client creates an XML data packet and posts it to the server Client Web server XML DOM tree 1 XMLHTTP object 2 XMLDOM object 4 XML ... demonstration, you will learn how to create an XMLDOM object on the client and populate it with a mixture of boilerplate XML data, XML data from a data island, and XML data based on user input....

Ngày tải lên: 10/12/2013, 16:16

... the btnCreateXMLFile button. The first task is to declare an instance of the XMLTextWriter. Then the XMLTextWriter creates and opens the file c:\Text .xml. Next, the XML document is created ... data that the XMLWriter generates conforms to W3C XML 1.0 and the namespaces in XML recommendations. With XMLWriter, you can accomplish the following: • Create well-formed XML. • Manage ... do I create an XML document with it? Technique The XMLWriter provides a quick way to generate streams or files that contain XML data. The stream is not cached; it is forward-only. The XML data...

Ngày tải lên: 14/12/2013, 20:16

... vào DataSet) Constraints  Constraint sẽ không thực thi nếu thuộc tính EnforceConstraint trong DataSet không được gán true  Vậy constraint chỉ sử dụng được nếu các Table tạo ra được add vào DataSet  Có ... (tt) DataViewManger  Namespace: System.Data  Là thuộc tính trong DataSet.  Thiết lập các DataView cho từng DataTable trong DataSet  Thuộc tính: DataViewSettings[“TênTable”] DataRelation Danh ... trên Table và DataBind DataViewManager: Dùng để lấy View của tất cả Table trong DataSet Ví dụ: Xây dựng quan hệ DataSet  Namespace: System.Data  Là một thể hiện database nhưng được lưu trong...

Ngày tải lên: 22/12/2013, 18:17

... myXmlFile2 .xml using the WriteXml() method Writing schema out to an XML file named myXmlSchemaFile .xml using the WriteXmlSchema() method Reading rows from myXmlFile .xml using the ReadXml() ... ReadXml(XmlReader myXmlReader); void ReadXml(stream myStream, XmlReadMode myXmlReadMode); void ReadXml(string fileName, XmlReadMode myXmlReadMode); void ReadXml(TextReader myTextReader, XmlReadMode ... myXmlReadMode); void ReadXml(XmlReader myXmlReader, XmlReadMode myXmlReadMode); where myXmlReadMode is a constant from the System.Data.XmlReadMode enumeration that specifies how to read XML...

Ngày tải lên: 24/12/2013, 01:17

... an ExecuteXmlReader( ) that allows you to retrieve an XML stream directly from SQL Server, where it returns an XmlReader that contains the results of the SQL query. The ExecuteXmlReader( ) ... return XML data, such as those with a FOR XML clause. The ExecuteXmlReader( ) method can also be used to return ntext data containing valid XML. For more information about the FOR XML clause, ... xmlTextBox.Text = ds.GetXml( ); Discussion SQL Server 2000 introduced support for retrieving data in XML format using the FOR XML clause. The .NET SQL Server...

Ngày tải lên: 24/12/2013, 05:15

Ngày tải lên: 21/01/2014, 11:20

Ngày tải lên: 21/01/2014, 11:20