Represents the structure, or schema, of a data field.
Assembly: System.Design (in System.Design.dll)
Thetype exposes the following members.
|DataType||Gets the type of data stored in the data field.|
|Identity||Gets a value indicating whether the value of the data field automatically increments for each new row added to the table or view.|
|IsReadOnly||Gets a value indicating whether the DataColumn is read-only.|
|IsUnique||Gets a value indicating whether values in the data field are required to be unique.|
|Length||Gets a value indicating the size of data that can be stored in the data field.|
|Name||Gets the name of the data field.|
|Nullable||Gets a value indicating whether the data field can accept null values.|
|Precision||Gets the maximum number of digits used to represent a numerical value in the data field.|
|PrimaryKey||Gets a value indicating whether the data field is in the primary key for the containing table or view.|
|Scale||Gets the number of decimal places to which numerical values in the data field are resolved.|
|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.)|
|GetType||Gets the Type of the current instance. (Inherited from Object.)|
|MemberwiseClone||Creates a shallow copy of the current Object. (Inherited from Object.)|
|ToString||Returns a string that represents the current object. (Inherited from Object.)|
Use the class to get the properties of a data field using a DataColumn. You can discover the structure of a data field by using the following properties in this class: DataType, IsReadOnly, Length, Name, and IsUnique. In addition, you can use the Identity property to determine if a data column is set for AutoIncrement, or the PrimaryKey property to determine if a data column is in the primary key.
The class is used by custom control designer components to provide information about a data field at design time.
To examine the components of data using a DataSet, use the following classes.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.