/// <summary>
/// mark a record as locked for editing
/// </summary>
/// <param name="tableName"></param>
/// <param name="recordID"></param>
/// <returns>true if locked, else set message</returns>
public bool LockTable(string tableName, int recordID, string recordDescription)
{
bool result = false;
if (!LockingEnabled)
{
return(true);
}
if (tableName.DoesntContain("]"))
{
tableName = "[" + tableName + "]";
}
if (AdministratorID > 0) // invalid admin id if 0 or less
{
if (!db.TableExists("lock"))
{
db.execute(@"
CREATE TABLE [dbo].[Lock](
[LockID] [int] IDENTITY(1,1) NOT NULL,
[TableName] [nvarchar](50) NULL,
[RecordID] [int] NULL,
[AdministratorID] [int] NULL,
[DateLocked] [datetime] NULL,
CONSTRAINT [pk_Lock] PRIMARY KEY CLUSTERED
(
[LockID] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]");
}
DataBlock rslock = db.execute("select * from lock where tablename=" + Fmt.SqlText(tableName) + " and recordid=" + recordID + " ");
if (rslock.eof())
{
db.execute("insert into lock(tablename,recordid,administratorid,datelocked)values(" + Fmt.SqlText(tableName) + "," + recordID + ", " + AdministratorID + "," + Fmt.SqlDateTime(DateTime.Now) + ")");
result = true;
}
else
{
var lockTime = rslock.GetValueDate("DateLocked");
if (lockTime.AddMinutes(LockNumMinutes) < DateTime.Now) // has lock timed out
{
//auto unlock / relock
IsLocked = true;
string adminUser = db.FetchValue("select email from Person where PersonID=" + AdministratorID + "");
UnLockTable(tableName, recordID, true); //any person unlock record - timed out
Web.InfoMessage = "Record was locked by " + adminUser + ", but its been " + LockNumMinutes + " minutes without a save, so you may now edit it. You may want to contact them to check you are not overwriting their work.";
result = LockTable(tableName, recordID, recordDescription);
}
else if (AdministratorID != rslock.GetValueInt("AdministratorID")) // make sure not same user
{
//int lockid = rslock.GetValueInt("LockID");
int adminid = rslock.GetValueInt("AdministratorID");
string adminUser = db.FetchValue("select email from Person where PersonID=" + adminid + "");
LockMessage = "This edit page is in use (" + Fmt.TimeDiffText(rslock["DateLocked"].ConvertToDate(null)) + " ago) by " + adminUser + ": " + recordDescription + " (id:" + recordID + "). You may save, but your changes may be overwritten by them. Check with this person, or wait " + LockNumMinutes + " mins.";
}
else
{
result = true;
}
}
rslock.close();
}
else
{
LockMessage = "Admin id missing";
}
IsLocked = result;
return(result);
}
