MissingSchemaAction Enumeration (System.Data)

MissingSchemaAction Enumeration

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Microsoft Visual Studio 2008/.NET Framework 3.5

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.NET Framework Class Library

MissingSchemaAction Enumeration

Specifies the action to take when adding data to the DataSet and the required DataTable or DataColumn is missing.

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

Syntax

Visual Basic (Declaration)

Public Enumeration MissingSchemaAction

Visual Basic (Usage)

Dim instance As MissingSchemaAction

public enum MissingSchemaAction

Visual C++

public enum class MissingSchemaAction

JScript

public enum MissingSchemaAction

Members

	Member name	Description
	Add	Adds the necessary columns to complete the schema.
	Ignore	Ignores the extra columns.
	Error	An InvalidOperationException is generated if the specified column mapping is missing.
	AddWithKey	Adds the necessary columns and primary key information to complete the schema. For more information about how primary key information is added to a DataTable, see FillSchema.To function properly with the .NET Framework Data Provider for OLE DB, AddWithKey requires that the native OLE DB provider obtains necessary primary key information by setting the DBPROP_UNIQUEROWS property, and then determines which columns are primary key columns by examining DBCOLUMN_KEYCOLUMN in the IColumnsRowset. As an alternative, the user may explicitly set the primary key constraints on each DataTable. This ensures that incoming records that match existing records are updated instead of appended. When using AddWithKey, the .NET Framework Data Provider for SQL Server appends a FOR BROWSE clause to the statement being executed. The user should be aware of potential side effects, such as interference with the use of SET FMTONLY ON statements. See SQL Server Books Online for more information.

Remarks

The MissingSchemaAction values are used whenever an action is taken that could change the schema of the DataSet.

Platforms

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Version Information

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

XNA Framework

Supported in: 3.0, 2.0, 1.0

Reference

System.Data Namespace

Merge