mirror of
https://github.com/gnh1201/welsonjs.git
synced 2025-10-31 04:51:17 +00:00
59 lines
1.5 KiB
Markdown
59 lines
1.5 KiB
Markdown
# WelsonJS.Esent
|
|
|
|
WelsonJS.Esent is a library that enables the use of the [ESENT](https://learn.microsoft.com/en-us/windows/win32/extensible-storage-engine/extensible-storage-engine) database (also known as the Extensible Storage Engine or JET Blue).
|
|
|
|
Although it was developed to support the WelsonJS framework, it can be used in any .NET-based project.
|
|
|
|
For more details, refer to the [WelsonJS Documentation](https://catswords-oss.rdbl.io/5719744820/5330609327).
|
|
|
|
## Example code
|
|
|
|
```csharp
|
|
using WelsonJS.Esent;
|
|
|
|
// connect the database to manage instances
|
|
Schema schema = new Schema("Instances", new List<Column>
|
|
{
|
|
new Column("InstanceId", typeof(string), 255),
|
|
new Column("FirstDeployTime", typeof(DateTime), 1)
|
|
});
|
|
schema.SetPrimaryKey("InstanceId");
|
|
_db = new EsentDatabase(schema, Path.GetTempPath());
|
|
|
|
// Insert row
|
|
try
|
|
{
|
|
_db.Insert(new Dictionary<string, object>
|
|
{
|
|
["InstanceId"] = instanceId,
|
|
["FirstDeployTime"] = now
|
|
}, out _);
|
|
}
|
|
catch (Exception ex)
|
|
{
|
|
// Handle exception
|
|
}
|
|
|
|
// find all
|
|
var instances = _db.FindAll();
|
|
foreach (var instance in instances)
|
|
{
|
|
try
|
|
{
|
|
string instanceId = instance["InstanceId"].ToString();
|
|
string firstDeployTime = instance.ContainsKey("FirstDeployTime")
|
|
? ((DateTime)instance["FirstDeployTime"]).ToString("yyyy-MM-dd HH:mm:ss")
|
|
: "Unknown";
|
|
|
|
Console.WriteLine($"{firstDeployTime}, {instanceId}");
|
|
}
|
|
catch (Exception ex)
|
|
{
|
|
// Handle exception
|
|
}
|
|
}
|
|
|
|
```
|
|
|
|
Source code available: https://github.com/gnh1201/welsonjs
|