The Load method fills each supplied DataTable instance with data from a single result set from the source data reader. Given these two hypothetical data sources, a user is likely to require one of the following behaviors: Initialize DataTable from a primary data source. A byte array that contains the raw bytes representing the symbols for the assembly. SampleIndex must always be specified first with multi-sample textures. Microsoft makes no warranties, express or implied, with respect to the information provided here. If the reader is positioned on a leaf node that is invalid for the root level of a document, for example a white space or attribute node, the reader continues to read until it is positioned on a node that can be used for the root. In the .NET Framework version 1.0 and in version 1.1 without SP1, when you use a Load method overload with a Byte[] parameter to load a COFF image, evidence is combined. The default namespace associated with DataSet, if any, is associated with each newly created DataTable. The stream containing the XML document to load. Fills a DataSet with values from a data source using the supplied IDataReader. Version 2.0 or later of the common language runtime is currently loaded and assemblyString was compiled with a later version. In this Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. Returns If the registry key name contains a space, enclose the key name in quotes. Microsoft makes no warranties, express or implied, with respect to the information provided here. Version 2.0 or later of the common language runtime is currently loaded and assemblyString was compiled with a later version. This file is in format. WebLoad (Stream) Creates a new XDocument instance by using the specified stream. These values may be equivalent, or may be different if the data in the row has been changed since filling the DataTable. These values may be equivalent, or may be different if the data in the row has been changed since filling the DataTable. More info about Internet Explorer and Microsoft Edge, Reading XML Data using XPathDocument and XmlDocument. WebThis occurs because the form values have already been loaded. The display name of the assembly. Windows. Microsoft makes no warranties, express or implied, with respect to the information provided here. When working with the schema, the Load method may encounter conditions as described in the following table. Methods which use evidence to sandbox are obsolete and will be removed in a future release of the .NET Framework. In this Notifies the server control to perform any processing steps that are set to occur on each page request. To determine which version of the primary key field to use for comparing the current row with an incoming row, the Load method uses the original version of the primary key value within a row, if it exists. The DataSet tracks changes, allowing synchronization with the primary data source. Evidence of the calling assembly and evidence of the COFF image is ignored. Forms Assembly: System.Windows.Forms.dll Important Some information relates to prerelease product that may be substantially modified before its released. Remarks In the .NET Framework version 2.0, processor architecture is added to assembly identity, and can be specified as part of assembly name strings. Preserve changes and re-synchronize from the primary data source. The trust level of an assembly that is loaded by using this method is the same as the trust level of the calling assembly. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. It's important to note that all of the elements in the vector If you need to use a XmlDocument object to work with XML, you can use the XmlTextReader object to create one. Occurs when the server control is loaded into the Page object. In addition, a DataTable can accept incremental data from one or more secondary data sources. These scenarios describe standard usage for a DataSet, describing its update and merge behavior. The following table describes the three load options provided by the LoadOption enumeration. WebLoad (String) Load (Byte [], Byte []) Overloads Load (Byte []) Loads the Assembly with a common object file format (COFF) based image containing an emitted Assembly. More info about Internet Explorer and Microsoft Edge. WebLoad (String) Loads the XML document from the specified URL. If the file is not found, the CodeBase property is used to search for the assembly. If the debugger has not yet loaded DLLName .dll, it loads the DLL at this point if it is located in the current DLL search path. Until an object is visible, a user can't interact with it. In addition, a DataSet can accept incremental data from one or more secondary data sources. When you use a Load method with an Evidence parameter, pieces of evidence are merged. Some information relates to prerelease product that may be substantially modified before its released. In this case, the method doesn't allow you to indicate the load option, and uses the default, PreserveChanges. Exceptions XmlException There is a load or parse error in the XML. Loads the XML document from the specified URL. This command is intended for use with temporary files that are used for troubleshooting or editing registry entries. The URL can be either a local file or an HTTP URL (a Web address). A texture-object type (except TextureCube or TextureCubeArray). The object that describes the assembly to be loaded. If the assembly is found using CodeBase, the display name is matched against the assembly. When you use a Load method overload with a Byte[] parameter to load a common object file format (COFF) image, evidence is inherited from the calling assembly. One common way to do this is to write a LINQ query and then call ToList on it, only to immediately discard the created list. The FillErrorEventArgs parameter passed to the procedure provides properties that allow you to retrieve information about the error that occurred, the current row of data, and the DataTable being filled. The Load method must take into account three specific issues when loading the data from an IDataReader instance: schema, data, and event operations. In terms of event operations, the RowChanging event occurs before each row is changed, and the RowChanged event occurs after each row has been changed. The following example demonstrates several of the issues involved with calling the Load method. The techniques shown in this topic apply equally to models created with Code First and the EF Designer. ; If you have a vector property, apply the VectorType attribute to the property in your data model. A FillErrorEventHandler delegate to call when an error occurs while loading data. The DataTable tracks changes, allowing synchronization with the primary data source. Evidence of the calling assembly and evidence of the COFF image are ignored. The URL can be either a local file or an HTTP URL (a Web address). (If you want finer control over the behavior of incoming data, see DataTable.Load.) An IDataReader that provides one or more result sets. C# public virtual void Load (string filename); Parameters filename String URL for the file containing the XML document to load. If the reader is in the initial state (ReadState =ReadState.Initial), Load consumes the entire contents of the reader and builds the DOM from what it finds. This method provides the same functionality, but allows you to load multiple result sets from an IDataReader into multiple tables within a DataSet. For information about how to obtain the fully qualified assembly name, see Assembly Names. In this scenario, the user wants to merge changes from one or more secondary data sources, and propagate those changes back to the primary data source. Use the Show method to make the object visible. Starting with .NET Framework 4, because execution of code in remote assemblies is disabled by default, a FileLoadException is also thrown if assemblyRef specifies a remote assembly. For information about the disadvantages of using the load-from context, see the Assembly.LoadFrom method overload or Best Practices for Assembly Loading. Values in a DataColumn can be constrained through use of properties such as ReadOnly and AutoIncrement. In each case, the description indicates the behavior when the primary key of a row in the incoming data matches the primary key of an existing row. (A partial name omits one or more of culture, version, or public key token. First, the example focuses on schema issues, including inferring a schema from the loaded IDataReader, and then handling incompatible schemas, and schemas with missing or additional columns. ; If you have a vector property, apply the VectorType attribute to the property in your data model. Specifies the name and path of the file to be loaded. A file that was found could not be loaded. Load columns as: Individual columns like Size and CurrentPrices in the HousingData class. However, the recommended way to specify an assembly name is to create an AssemblyName object and pass it to an appropriate overload of the Load method. Version 2.0 or later of the common language runtime is currently loaded and assemblyRef was compiled with a later version. Whether certain permissions are granted or not granted to an assembly is based on evidence. It's important to note that all of the elements in the vector Updates the original version of the row with the value of the incoming row. The example then calls the Load method, displaying the data both before and after the load operation. This operation is not supported on the current platform. This method is obsolete and will be removed in a future release of the .NET Framework. Returns XDocument An XDocument object that reads the data that is contained in the stream. In this case, a FileNotFoundException is raised. The following example demonstrates how to use the SetDesktopLocation, Load, Activated, and Activate members. Load columns as: Individual columns like Size and CurrentPrices in the HousingData class. Loads an assembly with the specified name. Load balancer provides low latency and high throughput, and scales up to millions of flows for all TCP and UDP applications. This method automatically detects the string format of the input XML (for example, UTF-8, ANSI, and so on). The tables parameter allows you to specify an array of DataTable instances, indicating the order of the tables corresponding to each result set loaded from the reader. This action value varies, depending on the state of the row before the load operation. A FillErrorEventHandler delegate to call when an error occurs while loading data. WebLoad Event Reference Feedback Definition Namespace: System. C# Copy public static System.Xml.Linq.XDocument Load (System.IO.Stream stream); Parameters stream Stream The stream that contains the XML data. Azure Load Testing Preview is a fully managed load-testing service that enables you to generate high-scale load. Some information relates to prerelease product that may be substantially modified before its released. The caller does not have the required permission. The Load method makes all these scenarios possible. The FillErrorEventArgs parameter supplies a Continue property: set this property to true to indicate that you have handled the error and wish to continue processing. These scenarios describe standard usage for a DataTable, describing its update and merge behavior. WebThis occurs because the form values have already been loaded. See FullName. If the assembly is found using CodeBase, the display name is matched against the assembly. See Row States and Row Versions for more information. The loadOption parameter allows you to specify how you want the imported data to interact with existing data, and can be any of the values from the LoadOption enumeration. The Load extension method works just like ToList except that it avoids the creation of the list altogether. The techniques shown in this topic apply equally to models created with Code First and the EF Designer. -or-. All but one of the overloads for this method allows you to specify a load option parameter, indicating how rows already in a DataTable combine with rows being loaded. Microsoft makes no warranties, express or implied, with respect to the information provided here. Fills a DataTable with values from a data source using the supplied IDataReader. Pieces of evidence supplied as an argument to the Load method supersede pieces of evidence supplied by the loader. FileLoadException is thrown if assemblyString specifies the full assembly name, and the first assembly that matches the simple name has a different version, culture, or public key token. If the current AppDomain object represents application domain A, and the Load method is called from application domain B, the assembly is loaded into both application domains. These scenarios describe standard usage for a DataTable, describing its update and merge behavior. A good example of this is loading entities for data binding as described in Local Data. Valid root keys for the local computer are: HKLM, HKCU, HKCR, HKU, and HKCC. If you want validation to occur, you can create a validating XmlReader instance by using the XmlReaderSettings class and the Create method.
Empowering School Culture And Social Structure Examples,