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. For information that is common to all overloads of this method, see the Load(AssemblyName) method overload. 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. Please use an overload of Load which does not take an Evidence parameter. For more information, see Row States and Row Versions. WebLoad (Stream) Creates a new XDocument instance by using the specified stream. Should it modify current values, original values, or both? Loading Elements There are several different ways to load the elements: Use an x:Bind expression to specify the load state. The Upsert option facilitates aggregating changes from one or more secondary data sources. A FillErrorEventHandler delegate to call when an error occurs while loading data. In general, the PreserveChanges and OverwriteChanges options are intended for scenarios in which the user needs to synchronize the DataSet and its changes with the primary data source. It's important to note that all of the elements in the vector When legacy CAS policy is not enabled, securityEvidence should be null. In general, the PreserveChanges and OverwriteChanges options are intended for scenarios in which the user needs to synchronize the DataSet and its changes with the primary data source. 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. Specifies the name and path of the file to be loaded. This method should be used only to load an assembly into the current application domain. Load object The object placeholder represents an object expression that evaluates to an object in the Applies To list. Loads the XML document from the specified TextReader. In this case, the document remains empty. Microsoft makes no warranties, express or implied, with respect to the information provided here. When you use a Load method overload with a Byte[] parameter to load a COFF image, evidence is inherited from the calling assembly. An array of DataTable instances, from which the Load(IDataReader, LoadOption, DataTable[]) method retrieves name and namespace information. More info about Internet Explorer and Microsoft Edge. It corresponds to the assembly's FullName property. The assembly is loaded into the domain of the caller using the supplied evidence. The example uses the file, books.xml, as input. Whether certain permissions are granted or not granted to an assembly is based on evidence. Fills a DataTable with values from a data source using the supplied IDataReader using an error-handling delegate. Remarks . This file is in format. The Load method's overwrites the read-only column values, if needed. To load an assembly from a byte array with the trust level of the application domain, use the Load(Byte[], Byte[], SecurityContextSource) method overload. Some information relates to prerelease product that may be substantially modified before its released. The value of securityContextSource is not one of the enumeration values. If the registry key name contains a space, enclose the key name in quotes. The DataTable tracks changes, allowing synchronization with the primary data source. 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. Applies to See also Introduction to the ASP.NET Page Life Cycle Recommended content UpdatePanel (System.Web.UI) LinkButton (System.Web.UI.WebControls) Web The read only constraint on a DataColumn is applicable only for changes that occur in memory. Shader Model 4.1 is available in Direct3D 10.1 or higher. These values may be equivalent, or may be different if the data in the row has been changed since filling the DataTable. See http://go.microsoft.com/fwlink/?LinkId=155570 for more information. A FillErrorEventHandler delegate to call when an error occurs while loading data. The following example creates a new DataSet, adds two DataTable instances to the DataSet, and then fills the DataSet using the Load method, retrieving data from a DataTableReader that contains two result sets. You can use this event to perform tasks such as allocating resources used by the form. For example, to access a 2D texture, supply integer texel coordinates for the first two components and a mipmap level for the third component. Have questions or feedback about Office VBA or this documentation? The rules for assembly and security evidence merging are as follows: When you use a Load method with no Evidence parameter, the assembly is loaded with the evidence that the loader supplies. Let me explain it again. This file is in format. Developers, testers, and quality assurance (QA) engineers can use it to optimize application performance, scalability, or capacity. The DataSet tracks changes, allowing synchronization with the primary data source. A byte array that is a COFF-based image containing an emitted assembly. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. Loads an assembly with the specified name. ; Multiple columns at a time in the form of a vector like HistoricalPrices in the HousingData class. The DataTable isn't responsible for tracking changes in order to allow synchronization with the secondary data source. Call GetTemplateChild with the name that you defined on the element. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. The example then adds tables to a DataSet and attempts to fill the tables with data from a DataTableReader. An array of type byte that is a COFF-based image containing an emitted assembly. This function is supported in the following shader models. The display name of the assembly. The trust level of an assembly that is loaded by using this method is the same as the trust level of the calling assembly. The assembly is loaded into the application domain of the caller. Exceptions XmlException There is a load or parse error in the XML. If your application needs to know which encoding is used to read the stream, consider using an XmlTextReader object to read the stream, and then use the XmlTextReader.Encoding property to determine the encoding. These issues, and more, are controlled by the loadOption parameter. The XmlReader used to feed the XML data into the document. Valid root keys for the local computer are: HKLM, HKCU, HKCR, HKU, and HKCC. Load (DirectX HLSL Texture Object) Article 04/28/2022 2 minutes to read 6 contributors Feedback In this article Parameters Return Value Minimum Shader Model Example Related topics Reads texel data without any filtering or sampling. Each cell in this table describes the current and original value for a field within a row, along with the DataRowState for the value after the Load method has completed. The Load method must take into account three specific issues when loading the data from an IDataReader instance: schema, data, and event operations. ; Multiple columns at a time in the form of a vector like HistoricalPrices in the HousingData class. Loads the assembly with a common object file format (COFF)-based image containing an emitted assembly, optionally including symbols and specifying the source for the security context. The stream containing the XML document to load. 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. With Azure Load Balancer, you can scale your applications and create highly available services. Please use an overload of Load which does not take an Evidence parameter. The service simulates traffic for your applications, regardless of where they're hosted. The assembly is loaded into the application domain of the caller. An array of DataTable instances, from which the Load(IDataReader, LoadOption, FillErrorEventHandler, DataTable[]) method retrieves name and namespace information. The evidence that first succeeds is the evidence that is used. The Load extension method works just like ToList except that it avoids the creation of the list altogether. 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 makes all these scenarios possible. The return values for the reg load operation are: To load the file named TempHive.hiv to the key HKLM\TempHive, type: More info about Internet Explorer and Microsoft Edge, Specifies the full path of the subkey to be loaded. Loads an Assembly into this application domain. Each of these tables must be a member of the DataTableCollection contained by this DataSet. The Load method attempts to find a table within the DataSet matching the name found in the array of table names, in order. Loads an assembly given its AssemblyName. The term load balancing refers to the distribution of workloads across multiple computing resources. The following example uses the StringReader class to load a string of XML data into the XmlDocument object. Occurs before a form is displayed for the first time. A load balancer health probe monitors a given port on each VM and only distributes traffic to an operational VM. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. Remarks If a remote computer is specified, valid root keys are: HKLM and HKU. These scenarios describe standard usage for a DataTable, describing its update and merge behavior. With Azure Load Balancer, you can scale your applications and create highly available services. To load an extension DLL, you can do one of the following: Use the .load or .loadby command. Notifies the server control to perform any processing steps that are set to occur on each page request. See FullName. This method is obsolete and will be removed in a future release of the .NET Framework. WebLoad (String) Load (Byte [], Byte []) Overloads Load (Byte []) Loads the Assembly with a common object file format (COFF) based image containing an emitted Assembly. [in] The texture coordinates; the last component specifies the mipmap level. Microsoft makes no warranties, express or implied, with respect to the information provided here. Use the Show method to make the object visible. Microsoft makes no warranties, express or implied, with respect to the information provided here. One or more DataTable's contents are modified. Call FindName with the name that you defined on the element. Before considering the behavior of the Load method in terms of data operations, consider that each row within a DataTable maintains both the current value and the original value for each column. If you select the Upsert option, it is assumed that the data is coming from one of a secondary data source, such as data provided by a middle-tier component, perhaps altered by a user. In each case, the Action property of the DataRowChangeEventArgs instance passed to the event handler contains information about the particular action associated with the event. The first is taken from a Windows Forms data binding application where Load is used to If the reader is already positioned on some node at depth "n", this method loads that node and all subsequent siblings up to the end tag that closes depth "n". Using partial names has a negative effect on performance. [in] An optional offset applied to the texture coordinates before sampling. The tables parameter allows you to specify an array of table names, indicating the order of the tables corresponding to each result set loaded from the reader. See http://go.microsoft.com/fwlink/?LinkID=155570 for more information. More info about Internet Explorer and Microsoft Edge, Load(IDataReader, LoadOption, DataTable[]), Load(IDataReader, LoadOption, FillErrorEventHandler, DataTable[]). Microsoft makes no warranties, express or implied, with respect to the information provided here. The loader does not continue probing for other assemblies that match the simple name. Set the property to false to indicate that you wish to halt processing. The example then displays the full name of the assembly's public types. Load balancing aims to optimize resource use, maximize throughput, minimize response time, and avoid overloading any single resource. This has the following results. WebLoad-balancing options. 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. The DataSet isn't responsible for tracking changes in order to allow synchronization with the secondary data source. Next steps. If the file is not found, the CodeBase property is used to search for the assembly. C# Copy public static System.Xml.Linq.XDocument Load (System.IO.Stream stream); Parameters stream Stream The stream that contains the XML data. Given these two hypothetical data sources, a user is likely to require one of the following behaviors: Initialize DataSet from a primary data source. This method provides the same functionality, but allows you to load multiple result sets from an IDataReader into multiple tables within a DataSet. . When you use a Load method with a Byte[] parameter and Evidence to load a COFF image, only the supplied evidence is used. (If you want finer control over the behavior of incoming data, see DataTable.Load.) Until an object is visible, a user can't interact with it. Windows. If the existing row and the incoming row contain corresponding primary key values, the row is processed using its current row state value, otherwise it's treated as a new row. The Load method fills each supplied DataTable instance with data from a single result set from the source data reader. An IDataReader that provides a result set. Exceptions XmlException There is a load or parse error in the XML. Specifies the name and path of the file to be loaded. Preserve changes and re-synchronize from the primary data source. If the current node and its siblings look like the following: Load throws an exception because a document cannot have two root level elements. To load assemblies into other application domains, use a method such as CreateInstanceAndUnwrap. C# public virtual void Load (string filename); Parameters filename String URL for the file containing the XML document to load. It's important to note that all of the elements in the vector Load columns as: Individual columns like Size and CurrentPrices in the HousingData class. To run the example, paste the following code in a form called Form1 containing a Button called Button1 and two Label controls called Label1 and Label2. For more information about the use of evidence with overloads of the Load method that take byte arrays, see the Load(Byte[], Byte[], Evidence) method overload. These values may be equivalent, or may be different if the data in the row has been changed since filling the DataTable. This command is intended for use with temporary files that are used for troubleshooting or editing registry entries. WebLoad-balancing options. These scenarios describe standard usage for a DataSet, describing its update and merge behavior. 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. More info about Internet Explorer and Microsoft Edge, Load(IDataReader, LoadOption, FillErrorEventHandler). The Load method consumes the first result set from the loaded IDataReader, and after successful completion, sets the reader's position to the next result set, if any. 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. In each case, both events occur, and the action is the same for each. An array of strings, from which the Load method retrieves table name information. For example, the following code loads MyAssembly into the new application domain ChildDomain and also into the application domain where the code executes: The assembly is loaded into both domains because Assembly does not derive from MarshalByRefObject, and therefore the return value of the Load method cannot be marshaled. The PreserveWhitespace property determines whether or not insignificant white space, that is white space in element content, is preserved. 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