barcode generator vb.net download Executing SQLXML BulkLoad from a .NET Application in .NET framework

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Executing SQLXML BulkLoad from a .NET Application
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You must include a reference to the Microsoft SQLXML BulkLoad 3.0 Type Library in your program before you can start using it in your code. After the project has been opened (or created), select Project | Add Reference. In the Add Reference dialog box, switch to the COM tab, select Microsoft SQLXML BulkLoad 3.0 Type Library, click Select, and click OK. If the component is not present, you can browse for it. You should be able to find xblkld3.dll in the \Program Files\Common Files\System\Ole DB\ folder. After you have added the reference to the project, you can declare an object of the SQLXMLBULKLOADLib.SQLXMLBulkLoad3 type.
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The number 3 at the end of the PROGID string represents the version of the component. If you want, your application can be set to always use the latest version by using the PROGID without the number. However, Microsoft has been changing features and interfaces between versions, and it is probably better to specify the version.
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Before executing, you need to specify the ConnectionString and ErrorLog attributes of the object. In the following case, we also set the object to accept XML
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fragments, and to drop and generate the target table, by setting the XMLFragment, SGDropTables, and SchemaGen attributes to True:
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'XmlBulkLoad_Simple Module Module1 Sub Main() Dim objBulk As New SQLXMLBULKLOADLib.SQLXMLBulkLoad3() objBulk.ConnectionString = "provider=SQLOLEDB.1;" + _ + "data source=(local)\ss2k;database=Asset;" _ + "integrated security=SSPI" objBulk.ErrorLogFile = "error.log" objBulk.XMLFragment = True objBulk.SchemaGen = True objBulk.SGDropTables = True 'do the load objBulk.Execute("Inventory.xsd", "Inventory.xml") objBulk = Nothing End Sub End Module
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During the load, the BulkLoad component will write fatal and nonfatal errors to the file specified by the ErrorLogFile property. The file is naturally an XML document:
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< xml version="1.0" > <Result State="FAILED"> <Error> <HResult>0x80004005</HResult> <Description> <![CDATA[No data was provided for column 'Cost' on table 'InventoryBulkLoad', and this column cannot contain NULL values.]]> </Description> <Source>General operational error</Source> <Type>FATAL</Type> </Error> </Result>
15: Modifying Databases Using SQLXML
Executing BulkLoad from DTS (Using VBScript)
DTS is my tool of choice for implementing data transfer applications in SQL Server. The current version of DTS does not have a specialized connection or task object for using XML documents as a data source. Fortunately, you can use an ActiveX Script Task (which allows you to write VBScript or JScript code) with the SQLXML BulkLoad component to achieve this objective. I created a DTS package with global variables for the XML document, XSD document, error log file, and connection string. Then I created an ActiveX Script Task (see Figure 15-4) to perform the load using the following code:
Function Main() Dim objBulk, objDTS, s Set objDTS = DTSGlobalVariables.Parent Set objBulk = CreateObject("SQLXMLBulkLoad.SQLXMLBulkload.3.0") objBulk.ConnectionString = objDTS.GlobalVariables("ConnectionString") objBulk.ErrorLogFile = objDTS.GlobalVariables("ErrorLog") objBulk.XMLFragment = True objBulk.SchemaGen = True objBulk.SGDropTables = True objBulk.Execute objDTS.GlobalVariables("XSD"), _ CStr(objDTS.GlobalVariables("XML") ) Main = DTSTaskExecResult_Success End Function
The statement for initializing the object is slightly different in VBScript, but you still need to reference the same component. The properties of the bulk load object are set from the global variables of the DTS package. The location of the XML document had to be converted to a string before it could be used in the Execute method. After the object is prepared, the procedure uses the Execute method to load the document. The Execute method requires the name of the XML data file and the name of the mapping schema that maps the XML file to the relational tables. The mapping file can be either an annotated XSD schema or an annotated XDR schema.
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Figure 15-4
ActiveX Script task for using BulkLoad component
NOTE
The preceding ActiveX script uses a hard-coded version (3.0) of the SQLXML BulkLoad component. Again, if you want your package always to use the latest version, use the PROGID without the number.
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