How do I read an XML file from a dataset?

How do I read an XML file from a dataset?

The XmlReader from which to read. One of the XmlReadMode values. The XmlReadMode used to read the data. The ReadXml method provides a way to read either data only, or both data and schema into a DataSet from an XML document, whereas the ReadXmlSchema method reads only the schema.

How do I use readxml to merge data from XML?

ReadXml does not merge from the XML into the DataSet any row information with matching primary keys. To overwrite existing row information with new information from XML, use ReadXml to create a new DataSet, and then Merge the new DataSet into the existing DataSet.

What is the use of readxml in Salesforce?

The ReadXml method reads the contents of the XML stream or document and loads the DataSet with data. It will also create the relational schema of the DataSet depending on the XmlReadMode specified and whether or not a relational schema already exists.

Which method is used to read the data from an XML?

The XmlReadMode used to read the data. Remarks. The ReadXml method provides a way to read either data only, or both data and schema into a DataSet from an XML document, whereas the ReadXmlSchema method reads only the schema.

Why can’t readxml read the dataset with no qualifying namespace?

If the XML Schema for a DataSet includes a targetNamespace, data may not be read, and you may encounter exceptions when calling ReadXml to load the DataSet with XML that contains elements with no qualifying namespace. To read unqualified elements, set elementFormDefault equal to “qualified” in your XML Schema as the following example demonstrates.

What is the difference between readxml and readxmlschema?

The ReadXml method provides a way to read either data only, or both data and schema into a DataSet from an XML document, whereas the ReadXmlSchema method reads only the schema. To read both data and schema, use one of the ReadXML overloads that includes the mode parameter, and set its value to ReadSchema.

Why can’t I load a DTD schema in readxml?

If your XML contains entities defined in a document type definition (DTD) schema, an exception will be thrown if you attempt to load a DataSet by passing a file name, stream, or non-validating XmlReader to ReadXml.