DbParameter Class

 

Represents a parameter to a DbCommand and optionally, its mapping to a DataSet column. For more information on parameters, see Configuring Parameters and Parameter Data Types.

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


Public MustInherit Class DbParameter
	Inherits MarshalByRefObject
	Implements IDbDataParameter, IDataParameter

NameDescription
System_CAPS_protmethodDbParameter()

Initializes a new instance of the DbParameter class.

NameDescription
System_CAPS_pubpropertyDbType

Gets or sets the DbType of the parameter.

System_CAPS_pubpropertyDirection

Gets or sets a value that indicates whether the parameter is input-only, output-only, bidirectional, or a stored procedure return value parameter.

System_CAPS_pubpropertyIsNullable

Gets or sets a value that indicates whether the parameter accepts null values.

System_CAPS_pubpropertyParameterName

Gets or sets the name of the DbParameter.

System_CAPS_pubpropertyPrecision

[Supported in the .NET Framework 4.5.1 and later versions]

Gets or sets the maximum number of digits used to represent the Value property.

System_CAPS_pubpropertyScale

Gets or sets the number of decimal places to which Value is resolved.

System_CAPS_pubpropertySize

Gets or sets the maximum size, in bytes, of the data within the column.

System_CAPS_pubpropertySourceColumn

Gets or sets the name of the source column mapped to the DataSet and used for loading or returning the Value.

System_CAPS_pubpropertySourceColumnNullMapping

Sets or gets a value which indicates whether the source column is nullable. This allows DbCommandBuilder to correctly generate Update statements for nullable columns.

System_CAPS_pubpropertySourceVersion

Gets or sets the DataRowVersion to use when you load Value.

System_CAPS_pubpropertyValue

Gets or sets the value of the parameter.

NameDescription
System_CAPS_pubmethodCreateObjRef(Type)

Creates an object that contains all the relevant information required to generate a proxy used to communicate with a remote object.(Inherited from MarshalByRefObject.)

System_CAPS_pubmethodEquals(Object)

Determines whether the specified object is equal to the current object.(Inherited from Object.)

System_CAPS_protmethodFinalize()

Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.)

System_CAPS_pubmethodGetHashCode()

Serves as the default hash function. (Inherited from Object.)

System_CAPS_pubmethodGetLifetimeService()

Retrieves the current lifetime service object that controls the lifetime policy for this instance.(Inherited from MarshalByRefObject.)

System_CAPS_pubmethodGetType()

Gets the Type of the current instance.(Inherited from Object.)

System_CAPS_pubmethodInitializeLifetimeService()

Obtains a lifetime service object to control the lifetime policy for this instance.(Inherited from MarshalByRefObject.)

System_CAPS_protmethodMemberwiseClone()

Creates a shallow copy of the current Object.(Inherited from Object.)

System_CAPS_protmethodMemberwiseClone(Boolean)

Creates a shallow copy of the current MarshalByRefObject object.(Inherited from MarshalByRefObject.)

System_CAPS_pubmethodResetDbType()

Resets the DbType property to its original settings.

System_CAPS_pubmethodToString()

Returns a string that represents the current object.(Inherited from Object.)

NameDescription
System_CAPS_pubinterfaceSystem_CAPS_privpropertyIDbDataParameter.Precision

Indicates the precision of numeric parameters.

System_CAPS_pubinterfaceSystem_CAPS_privpropertyIDbDataParameter.Scale

For a description of this member, see IDbDataParameter.Scale.

Universal Windows Platform
Available since 10
.NET Framework
Available since 2.0

Any public static ( Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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