Lock A Table Via Code
Mar 9, 2009
1. I have to select the next invoice number from one table.
2. Then i have to insert this invoice number as it is in three other tables.
3. Then once i have done so i have to go and update the invoice number by +1 (increment by
1). And i have to do this for each row in the datatable.
During this whole period i do not want anyone to access (read or change) that invoice number. We can lock the table or row. Does not matter. How can i do it? I am not suppose to use store procedure. Lock table ... does not work. It is not an T-SQL stmet select invoice number with (readlock) ....... only works while this stement is runned. I want to have the table or row locked until i have done 1,2 and 3rd steps. I have seaching for a stamt in sql which will do this for me! But didnt find anything. All results point me to SP which i cannot use.
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Dec 18, 2008
how can I check if an oracle tabel is lock in VB .NET?
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Mar 6, 2010
I have a process that is a detail/Master issue. I read (into a dataset) my detail record based on several keys. Then I have to read each master record..check some fields/update some fields and then update that master. Detail is not changed. First.. How do I not lock the detail table during my select?
[Code]...
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May 15, 2010
This is a part of my project, my project basically uses a motion sensor to detect any intrusion. So one of the modules is to lock the PC on detection of an intruder. Is there a way to lock the PC using Visual Basic?(Because most of the other modules have been programmed in Visual Basic.) I am basically looking for source code that can implement something similar to "Windows button + L".
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Feb 23, 2012
I'm working on a small program to activate winlogon,and to automatically log out of my account, but I'm unsure how to implement this in code.
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Jan 24, 2012
I'm newbie in VB .Net.I do want to lock a textbox but I cannot supply the right code for it.
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Jan 27, 2010
For speed, I've decided to use temporary tables as the recordsource for a report. The problem occurs when I try and tidy up after the report is closed by trying to drop the temp table. Trying to do this using database.execute "DROP TABLE x" where x is the name of the temp table. Get a Run-time 3211 error that the table still has locks. I figured that any locks generated by the report would be dropped at least by the Deactivate event, but that doesn't seem to be the case. how to use a temp table in the report withot incurring an enduring table lock? The report is the sole user.
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Feb 24, 2009
i want to access locked databse from my vb.net code, i really dont have code for that,
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Mar 5, 2009
i'm trying to Handle the Micosoft.Win32.SessionSwitch Event, so when Windows is going to be locked by the user, i will simply write a line to the console.When it's going to be unlocked, the same.
Here's the code:
Sub Main()
AddHandler Microsoft.Win32.SystemEvents.SessionSwitch,
_ SystemEvents_Sessionswitch()
Console.ReadLine()
[code]....
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May 30, 2011
I have 3 web methods in a WCF, called 'DeleteGroup', 'AddGroup', 'ModifyGroup'.Each method has its own code. I want to place a lock on code within each method, so that only one method executes at a time. For example, if 'DeleteMethod' is being executed then no request for 'AddGroup' or 'ModifyGroup' can be executed. So may be I could use something like what is below, but not very sure ? Also, where in the WCF would I declare the locker object, and would it be private, public or static (i.e. shared)?
SyncLock locker
--Delete Method Body
End SyncLock
[code].....
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Dec 15, 2011
i want to create an exe in vb.net by packaging few perl files along with it. when i am packaging those files i am able to hide those files by making the hide option true. but if the 'show hidden files' is selected those files will be visible. I want to lock/prevent the user from opening the perl file/code. want to know if there is any way to do it.
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Jul 27, 2010
when populating a data grid i keep getting a redundant row in the bottom. is there a way to lock grid rows to the number of rows in the data table?
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Apr 23, 2009
I have this code to edit the datarow of my table adapter but t doesnt update the table. I think i have a missing code that's why but i cant figured it out. by the way im using vb2008 and SQL as my database. [code]
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Feb 26, 2011
I added a table to my Access database. I added that table to my dataset. Using Database Designer VB Studio, my table and tableadapter show up in the design view. The class definition is in the datasetdesigner.vb, and it shows in the object browser. But, I can't reference it in code. I am a newby and obviously missing somethning.
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Apr 4, 2011
I'm converting a project from .net 1.1 to 3.5, and everywhere the following is used in the markup:
Design_Time_Lock: true
e.g.
<asp:linkbutton id="lbRun" style="Z-INDEX: 111; Design_Time_Lock: True" runat="server">Run</asp:linkbutton>
[Code]....
I've read up about the Design_Time_Lock attribute, and I can see when it will and won't be generated. However I don't really understand the point of it. And- more importantly- can all instances of it be safely removed throughout the code?
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May 13, 2009
I have two tables on a webform. On a button click I want to hide one and show the other. I gave them both an Id and I want to set the tables' style="display:"
I tried this in javaScript using a function and document.getelementbyid(id).style.display='none' but it did not work.
Solution:
OnClientClick="javascript: tbl2.style.display='';tbl1.style.display='none';return false;"
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Nov 2, 2009
I have an exising SQL dataset in my VB 2008 program. I want to add the table below to this dataset. I did it before but I can not remember how. The name of the existing dataset is ERICOseismicDataSet. I am using this table to pass user generated data to a Crystal Report. how to add this table to the dataset?
[Code].....
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Feb 3, 2011
I have a page with a html table on and am accessing it from code behind and changing what is displayed depending on values from a database, I have managed to change what text is displayed and the background color but i'm struggling to change either a rows or a cells font/fore color.
'Iterate through the rows of the table.
For i = 0 To Table1.Rows.Count - 1
'Iterate through the cells of a row.
For j = 0 To Table1.Rows(i).Cells.Count - 1
[code]....
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Jul 8, 2009
I have code to populate an xml table however i do not know what types to use, here is my code, what should i define differently and is there any other way to do it? [Code]
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Apr 30, 2010
I am working on a rich text editor. I want to add a table to document. My table has 2 columns and 3 rows. Rtf code of my table is as follows:
[Code]...
How can I insert this code to a rtf document which is not empty. I want to add this table between two paragraphs for instance. How can I do this?
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Mar 2, 2011
I want to populate a LINQ table from code, not DataBase.Is it possible ?System.Data.Linq.Table<Question> myquestions = new System.Data.Linq.Table<Question>();
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Jun 10, 2011
i have code to produce a database and tables but now i am looking 4 code 2 add relationships to the tables i would have made
[Code]...
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Jul 22, 2011
My question is a combination of VB.Net creating html code..No Google links to pointless areticles in languages that are not VB.NET, please. If you cannot code it yourself, please don't reply because it's so annoying to ask a question then get pointless, timewasting links just so you can get your points score up.I have a table which has 3 columns - nothing special just simple but its's the row number I am having issues with. Will explain soon.There is a directory with jpg files in it and the number of jpg files increased yesterday by 67, today by 37. Because the picture files come with any filename I have created a Windows app that renames the new files taking the ending point of yesterdays number as the starting point for today..So, each row holds 3 jpg files therefore 67 jpg / 3 = rows (yesterday). First number today is 68. I type 68 into the app I created, enumberating & moving (renaming) the jpg ('hduyhdgu.jpg becomes 68.jpg, suhdos.jpg becomes 69.jpg and so on for each of the new jpgs in that directory. That is done by the simple FileInfo/DirectoryInfo classes. Whilst renaming the photos in numerical sequence it has to write the html in the following form: [code] My Questions are:
1) How to sort out the row numbers so they flow in groups of 3 correctly and not 70, 71, 72, 71, 72, 73, 74, 75..?
2) How to create the table in code that dynamically draws itself with 3 columns (200px each done by CSS) wide and enough rown to hold every jpg in that directory? So, if I moved 5000 jpgs in that directory tomorrow the code will loop through and create the html.
3) If creating the table dynamically as in Q2 above how would I fix the place to draw it? Placeholder? A div is easy (<div 'id="MyTable" runat="server"></div>. In code behind: MyTable.InnerText=.../MyTable.InnerHtml=...) but is it the best idea? [code]
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Jun 2, 2009
well i am truing 2 make a button when i click it would truncate the data in table , i am trying 2 do this by vb.net 2005.
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Sep 28, 2009
I am tyring to set up a macro to update a pivot table. I have typed the following code into my macro:
[Code]...
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May 14, 2012
I am trying to seek a specific record from a database.mdf created in visual basic 10 express. But I am getting OpenDatabase and OpenTable not declared. How can I open and access records? [code]
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Mar 7, 2009
code for creating a class in vb.net for a database table that includes insert,delete,update function.
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Jun 5, 2011
code to insert a row to a table in database in visual basic 2010?
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Aug 13, 2009
I have a search page in my application where I am searching the database for the records that meet the specified conditions that the user selects. All of this works by creating the dataset, datatable, and dataadapter in the code. I then take a created bindingsource link it to the created datatable and then attach the bindingsource to my datagridview to display the results. Now what I am trying to do is to figure the Mean, Median, Mode and Standard Deviation of the results that were found above. My question is how to I run a select query on the code created table. I have the select query I want to use and when I try to use it in the code it talks about the connection. Now I have a dataset that is part of the project and I have the on just for the search page. Let me know if you need any code samples.
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Feb 13, 2010
I want to hide a column of ListView based on the role from the code behind. Here's the mark-up and the code:
<asp:ListView ID="lvTimeSheet" runat="server">
<LayoutTemplate>
<table id="TimeSheet">
<thead>
<tr>
[Code]...
But that column id="thDelete" is visible all the time. How do I go about hiding the column based on some condition from the code behind?
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