ConnectionState Enum
Important
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Describes the current state of the connection to a data source.
This enumeration supports a bitwise combination of its member values.
public enum class ConnectionState[System.Flags]
public enum ConnectionState[<System.Flags>]
type ConnectionState = Public Enum ConnectionState- Inheritance
- Attributes
| Name | Value | Description |
|---|---|---|
| Closed | 0 | The connection is closed. |
| Open | 1 | The connection is open. |
| Connecting | 2 | The connection object is connecting to the data source. |
| Executing | 4 | The connection object is executing a command. (This value is reserved for future versions of the product.) |
| Fetching | 8 | The connection object is retrieving data. (This value is reserved for future versions of the product.) |
| Broken | 16 | The connection to the data source is broken. This can occur only after the connection has been opened. A connection in this state may be closed and then re-opened. (This value is reserved for future versions of the product.) |
The ConnectionState values are used by the State property of the OleDbConnection and SqlConnection objects.
备注
The values in this enumeration are not designed to be used as a set of flags.
| 产品 | 版本 |
|---|---|
| .NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10 |
| .NET Framework | 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
| .NET Standard | 2.0, 2.1 |
| UWP | 10.0 |
