Row Level Locking Problem - Important


   This is multi user app. Now what i want when one user open record in edit/delete mode , other user should get the error msg the record is locked by other user. I have a table structure i.e

  EmpMaster ---- Master Records of Employees  -- Primary Key
  EmpLog ---- Records Attendance of Employees -- Foreign Key

   I want when 'A' user click on Edit/Delete Button , particular Record from the above tables should be locked on server. And When the 'B' User Want to delete/modify same record an error should be raised , but the user can view the record. How can i do this.

  i am using Vb6 with Ado 2.7 and Sql Server 7.0.

  i have heared the Row Level Locking Can also be done on Sql Server.

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See the link
This is from MSDN
SAMPLE: Rowlock.exe Demonstrates Row-Level Locking Using ADO & SQL Server
You could indeed do it on SQL-Server level, with the <table_hint> part in the FROM clause:

Table Hint Syntax

[ FROM { < table_source > } [ ,...n ] ]

< table_source > ::=
    table_name [ [ AS ] table_alias ] [ WITH ( < table_hint > [ ,...n ] ) ]
< table_hint > ::=
    { INDEX ( index_val [ ,...n ] )
        | HOLDLOCK
        | NOLOCK
        | PAGLOCK
        | READPAST
        | ROWLOCK
        | TABLOCK
        | TABLOCKX
        | UPDLOCK
        | XLOCK

There are fifteen hints defined in this syntax listing. Thirteen of these hints (HOLDLOCK, NOLOCK, PAGLOCK, READCOMMITTED, READPAST, READUNCOMMITTED, REPEATABLEREAD, ROWLOCK, SERIALIZABLE, TABLOCK, TABLOCKX, UPDLOCK, XLOCK) are considered table-level.
More info:

I think it should work already like that.

If it is not, then it is strange.

The important is that you open a recordset in Edit mode and using LockEdit=true (or false, try the two).

Then, whenever you try to open it again in edit mode, it should give the error and then you open it just for reading.



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jatinderbahlAuthor Commented:

   i alrady downloaded RowLock.exe and i am going through it. rest i am also trying wsteegmans
 approach .  
jatinderbahlAuthor Commented:
Hi rajaamirapu

    i tried RowLock It works fine but when i try whole thing in my project nothing happens. Is there any some sort of setting on Server Side.

Hi  wsteegmans

   I tried the synatx On USer A like this "Select * from Author With (ROWLOCK)"
 But nothing happens to User B , no error generated. what is wrong.....
jatinderbahlAuthor Commented:

   any body to respond

How/Where did you use this ROWLOCK? Because, I think you must always use it together with a TransAction ...


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jatinderbahlAuthor Commented:
hi  wsteegmans

    i write the same code as written in RowLock.exe , but the original code runs fine whereas my code does not reflect the desired results.
jatinderbahlAuthor Commented:

   i got the solution and thanks to  wsteegmans and rajaamirapu for discussion.
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