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How Do I...Use an XmlNodeReader?
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| Total Hit (995) |
This sample illustrates how to create and use an XmlNodeReader. An XmlNodeReader is a reader that provides fast, non-cached, forward-only access to XML data in an XmlNode. It has the ability to read an entire XML DOM tree or read from just a subtree. However, the XmlNodeReader does not support Docum
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How Do I...Load XML data into an XmlDataDocument?
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| Total Hit (969) |
This sample illustrates how to load XML into the XmlDataDocument class. This class extends the XmlDocument class, allowing structured data to be stored, retrieved, and manipulated through the DataSet class, which provides a relational view onto the loaded XML data. This affiliation between the XmlDo
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How Do I...Navigate XML with the XPathNavigator?
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| Total Hit (1010) |
This sample illustrates how to navigate XML documents with an XPathNavigator created from an XPathDocument. It also demonstrates how to use an XPathNodeIterator. The XPathNavigator class provides a cursor-style model to navigate an XML document. This topic also introduces XML Path Language (XPath) e
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How Do I...Query XML with an XPath expression?
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| Total Hit (990) |
This sample illustrates how to query an XPathDocument with an W3C XML Path Language (XPath) expression supplied to the XPathNavigator class. The XPathNavigator class is only for read-only XPath queries over a document and, for Extensible Stylesheet Language Transformations (XSLT) processing, is impl
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How Do I...Apply an XSL Transformation to XML?
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| Total Hit (994) |
This sample illustrates how to apply an Extensible Stylesheet Language Transformations (XSLT) file to an XML document using the XslTransform class. This class implements the World Wide Web Consortium (W3C) W3C XSL Transformations (XSLT) version 1.0 specification. (For further reference, you might wa
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How Do I...Use an XPathExpression class?
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| Total Hit (1052) |
This sample illustrates how to use an XPathExpression class to compile an XML Path Language (XPath) expression to select a node-set from an XML file. Then the sample demonstrates how to add a custom sort routine and use an XPathExpression to sort the elements returned by the compiled XPath. Finally,
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How Do I...Create DataSet mappings from an XSD schema?
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| Total Hit (961) |
This sample illustrates how to create DataSet mappings from a supplied XML Schema Definition language (XSD) schema. Generally, schemas are metadata, or data about data, but XSD schemas also cover the relationships between data types. From a schema, you can create a relational structure of tables and
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How Do I...Load a DataSet with XML?
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| Total Hit (992) |
This sample illustrates how to load a DataSet with XML Data. The sample builds on the topic, How Do I...Create DataSet mappings from an XSD schema?, by first loading XML data into an XmlDataDocument and then accessing this data from the DataSet. The DataSet has previously loaded a schema in order to
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How Do I...Infer DataSet mappings from XML?
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| Total Hit (940) |
This sample illustrates how to create DataSet mappings from XML Data. This sample uses the concept of inference, whereby the actual structure of the XML data itself is the basis for a relational schema. The sample then creates a relational structure of tables and columns to store data in a DataSet t
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How Do I...Save a DataSet as XML?
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| Total Hit (1210) |
This sample illustrates how to use XmlDataDocument to save relational data from a DataSet to an XML file. This demonstrates the transition from relational data to XML data.
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How Do I...Read and Write a Schema?
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| Total Hit (561) |
This sample illustrates how to read an XML Schema Definition language (XSD) file into the Schema Object Model (SOM). Then, the sample writes the XSD schema which has been loaded into memory to a StringWriter for display to the screen. The schema could also be written to a file using an XmlWriter.
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How Do I...use the Xml Schema Object Model?
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| Total Hit (559) |
This sample illustrates how to read two XML Schema Definition language (XSD) schemas into a SchemaCollection, navigate through the schemas that they represent, and create a fictious XML output that is representative of the schema's.
This sample shows how to use the XmlSchemaCollection to cache a
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How Do I...Use XML Schema Collection?
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| Total Hit (609) |
This sample illustrates how to use the XmlSchemaCollection class used by the XmlValidatingReader for efficient data validation. The XmlSchemaCollection class allows you to maintain a cache of multiple XML Schema Definition language (XSD) and XML-Data Reduced (XDR) schemas which can then be used when
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How Do I...use XmlNamespaceManager and NameTable?
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| Total Hit (538) |
This sample shows how to select namespace specific XML data from an XmlDocument. It demonstrates the use of the XmlNamespaceManager class. This class encapsulates a collection of namespaces and provides a variety of namespace management tasks, such as resolving, adding, and removing namespaces to a
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How Do I... Get Started Using Interoperability?
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The common language runtime's COM interoperability services make it possible to use existing COM objects from within managed applications and expose managed objects to existing COM applications.
Note: Managed code is code that targets the common language runtime.
In addition, the runtime's p
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How Do I...Build a .NET COM Server Callable from COM clients?
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This section explains how to build and install managed code that will be used from COM applications. The steps involved in the build process are as follows:
«LI»Write and compile the managed code.
«LI»Generate a type library for the assembly using the tlbexp.exe utility.
«LI»Install and regi
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How Do I...Pass Simple Data from .NET Code to VB6 code?
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This example demonstrates how to use .NET objects from a Visual Basic 6.0 application. The same technique can be used to create the object from any COM application, including those built with Visual C++ 6.0, VBScript, or JScript.
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How Do I...Pass an Array From .NET Code to VB6 Code?
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This example demonstrates how to use a .NET object from a Visual Basic 6.0 application. The same technique can be used to create the object from any COM application including those built with Visual C++ 6.0, VBScript or JScript.
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How Do I...Build a .NET Client That Uses a COM Server?
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This section explains how to build managed code that uses COM. The steps involved in the build process are as follows:
«LI»Obtain an assembly containing definitions of the COM types to be used.
«LI»Install the assembly in the global assembly cache. (optional)
«LI»Reference the assembly conta
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How Do I...Call COM Methods from .NET?
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| Total Hit (804) |
This example demonstrates how to use COM object from a Visual Basic .NET or C# application.
In order to use the types defined within a COM library from managed code, you must obtain an assembly containing definitions of the COM types. Refer to the How Do I...Build a .NET Client That Uses a COM Se
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How Do I...Sink Unmanaged Events from .NET?
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This example demonstrates how to sink unmanaged events from .NET code.
In order to use the types defined within a COM library from managed code, you have to obtain an assembly containing definitions of the COM types. Refer to the How Do I...Build a .NET Client That Uses a COM Server? for specific
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How Do I...Marshal Strings Between Managed and Unmanaged Code?
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This example demonstrates how to marshal strings from .NET client to COM server.
In order to use the types and methods defined within a COM library from managed code, you have to obtain an assembly containing definitions of the COM types. Refer to the How Do I...Build a .NET Client That Uses a CO
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How Do I...Call a Function Exported From an Unmanaged Library?
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This example demonstrates how to call a function exported from an unmanaged library from managed code. The MessageBox routine in User32.dll and GetSystemTime routine in Kernel32.dll are called. The same technique can be used to call any exported function in any other library.
In order to call Me
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How Do I...Read a text file?
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| Total Hit (1044) |
This sample retrieves information from a text file, and uses an ArrayList to display that information for the user.
Opening and reading files for read access is an important part of IO functionality, even if you do not need to write to the file in question. In this example, we open a file for read
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How Do I...Enumerate directories and their contents?
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| Total Hit (1272) |
This sample illustrates how to use the DirectoryInfo class to create a directory listing. This is a great way to quickly list files for users or reports, or to find basic information about a specific directory. When used in combination with FileInfo, you can get all the information you need about fi
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How Do I...Create a log file?
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| Total Hit (1232) |
This sample illustrates how to create a basic log file using the IO classes. This demonstration introduces many useful concepts such as writing to a file, and opening a file, even if the file does not yet exist. Since the information written to the file needs to be shown to the user, this example al
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How Do I...Read and write large files?
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| Total Hit (1387) |
This sample demonstrates how to write a large file and read it back in. This sample also shows how to time such operations. It accepts a file size (measured in kilobytes) from the user, indicating the size of the file to create. The larger the specified size, the longer the process will take to both
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How Do I...Read and write binary data?
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| Total Hit (1656) |
This sample illustrates basic binary file input and output using the BinaryReader, BinaryWriter and FileStream classes. A similar topic is presented under the heading How Do I...Create a log file?. Reading and writing binary information enables you to create and use files that are not accessible thr
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How Do I...Handle Events from XmlDocument?
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| Total Hit (912) |
This sample illustrates how to receive and handle events when nodes in an XML document change. In particular, this sample demonstrates how to catch the NodeChanged and NodeInserted events described in the following paragraphs.
Modifying an XmlDocument can result in one or more of the following e
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