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XmlReadMode Enumeration

Specifies how to read XML data and a relational schema into a DataSet.

[Visual Basic]
<Serializable>
Public Enum XmlReadMode
[C#]
[Serializable]
public enum XmlReadMode
[C++]
[Serializable]
__value public enum XmlReadMode
[JScript]
public
   Serializable
enum XmlReadMode

Remarks

Use the members of this enumeration when setting the ReadMode parameter of the ReadXml method.

Note    Auto mode may be slower than setting XmlReadMode to an explicit option.

Members

Member name Description
Auto

Supported by the .NET Compact Framework.

Default. Performs the most appropriate of these actions:

If the data is a DiffGram, sets XmlReadMode to DiffGram.

-or-

If the dataset already has a schema, or the document contains an in-line schema, sets XmlReadMode to ReadSchema.

-or-

If the dataset does not already have a schema and the document does not contain an in-line schema, sets XmlReadMode to InferSchema.

DiffGram

Supported by the .NET Compact Framework.

Reads a DiffGram, applying changes from the DiffGram to the DataSet. The semantics are identical to those of a Merge operation. As with the Merge operation, RowState values are preserved. Input to ReadXml with DiffGrams should only be obtained using the output from WriteXml as a DiffGram.

The target DataSet must have the same schema as the DataSet on which WriteXml as DiffGram is called. Otherwise the DiffGram merge operation fails, and an exception is thrown.

Fragment

Supported by the .NET Compact Framework.

Reads XML documents, such as those generated by executing FOR XML queries, against an instance of SQL Server. When XmlReadMode is set to Fragment, the default namespace is read as the inline schema.
IgnoreSchema

Supported by the .NET Compact Framework.

Ignores any inline schema and reads data into the existing DataSet schema. If any data does not match the existing schema, it is discarded (including data from differing namespaces defined for the DataSet). If the data is a DiffGram, IgnoreSchema has the same functionality as DiffGram.
InferSchema

Supported by the .NET Compact Framework.

Ignores any inline schema, infers schema from the data and loads the data. If the DataSet already contains a schema, the current schema is extended by adding new tables or adding columns to existing tables. An exception is thrown if the inferred table already exists but with a different namespace, or if any of the inferred columns conflict with existing columns.
ReadSchema

Supported by the .NET Compact Framework.

Reads any inline schema and loads the data. If the DataSet already contains schema, new tables may be added to the schema, but an exception is thrown if any tables in the inline schema already exist in the DataSet.

Requirements

Namespace: System.Data

Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, .NET Compact Framework

Assembly: System.Data (in System.Data.dll)

See Also

System.Data Namespace

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