DbParameter Class
.NET Framework 4.5
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 (ADO.NET).
Namespace: System.Data.Common
Assembly: System.Data (in System.Data.dll)
The DbParameter type exposes the following members.
| Name | Description | |
|---|---|---|
 | DbType | Gets or sets the DbType of the parameter. |
| Direction | Gets or sets a value that indicates whether the parameter is input-only, output-only, bidirectional, or a stored procedure return value parameter. |
| IsNullable | Gets or sets a value that indicates whether the parameter accepts null values. |
| ParameterName | Gets or sets the name of the DbParameter. |
| Size | Gets or sets the maximum size, in bytes, of the data within the column. |
| SourceColumn | Gets or sets the name of the source column mapped to the DataSet and used for loading or returning the Value. |
| SourceColumnNullMapping | Sets or gets a value which indicates whether the source column is nullable. This allows DbCommandBuilder to correctly generate Update statements for nullable columns. |
| SourceVersion | Gets or sets the DataRowVersion to use when you load Value. |
| Value | Gets or sets the value of the parameter. |
| Name | Description | |
|---|---|---|
| CreateObjRef | Creates an object that contains all the relevant information required to generate a proxy used to communicate with a remote object. (Inherited from MarshalByRefObject.) |
| Equals(Object) | Determines whether the specified object is equal to the current object. (Inherited from Object.) |
| Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) |
| GetHashCode | Serves as a hash function for a particular type. (Inherited from Object.) |
| GetLifetimeService | Retrieves the current lifetime service object that controls the lifetime policy for this instance. (Inherited from MarshalByRefObject.) |
| GetType | Gets the Type of the current instance. (Inherited from Object.) |
| InitializeLifetimeService | Obtains a lifetime service object to control the lifetime policy for this instance. (Inherited from MarshalByRefObject.) |
| MemberwiseClone() | Creates a shallow copy of the current Object. (Inherited from Object.) |
| MemberwiseClone(Boolean) | Creates a shallow copy of the current MarshalByRefObject object. (Inherited from MarshalByRefObject.) |
| ResetDbType | Resets the DbType property to its original settings. |
| ToString | Returns a string that represents the current object. (Inherited from Object.) |
| Name | Description | |
|---|---|---|
 | IDbDataParameter.Precision | Indicates the precision of numeric parameters. |
| IDbDataParameter.Scale | For a description of this member, see IDbDataParameter.Scale. |
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
