After a few months, my website has been down because of someone from Tunisia was proudly hacking my website for his glory without thinking the impact to someone else. well anyway, life goes one and I forgive him regardless. I’ll start writing a few articles in the next few weeks of Message broker in SQL Server, Dependency Injection, and Thread pooling.
First method is to use the “Using” keyword which is quite clean and simple
using (IDisposable obj = new DataTable())
{
//do your logic with obj variable
}
Second method is to use Try and finally keyword
IDisposable obj = null;
try
{
obj = new DataTable();
}
finally
{
if (obj != null)
{
obj.Dispose();
}
}
Normally when you have a UTF8 encoded file then it might have BOM character that will be rendered when you read it using filestream even though when you open the file with the notepad it doesn’t have that character.
I’ve created a function to remove the BOM character from the file
private void removeBoms(string filePattern, string directory)
{
try
{
foreach (string filename in Directory.GetFiles(directory, filePattern))
{
var bytes = System.IO.File.ReadAllBytes(filename);
if (bytes.Length > 2 && bytes[0] == 0xEF && bytes[1] == 0xBB && bytes[2] == 0xBF)
{
System.IO.File.WriteAllBytes(filename, bytes.Skip(3).ToArray());
}
}
MessageBox.Show(“Files have been processed completely!”);
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
//uncomment this for recursive
//foreach (string subDirectory in Directory.GetDirectories(directory))
//{
// removeBoms(filePattern, subDirectory);
//}
}
How to call it
private void btnProcess_Click(object sender, EventArgs e)
{
string extension = txtExtensions.Text;
if (extension.Trim().Length > 0 || folderBrowserDialog1.SelectedPath.Trim().Length > 0)
{
if (!extension.StartsWith(“*.”))
{
extension = “*.” + extension;
}
//just process the html files
removeBoms(extension, folderBrowserDialog1.SelectedPath);
}
else
{
if (extension.Trim().Length == 0)
{
txtExtensions.Focus();
MessageBox.Show(“Please specify the extension files”);
}
else if (folderBrowserDialog1.SelectedPath.Trim().Length == 0)
{
MessageBox.Show(“Please select target folder”);
}
}
}
Simple function to encode and decode UTF8 character for unicode (this is for IE)
Encode
utf8bytes= unescape(encodeURIComponent(unicodecharacters));
Decode
unicodecharacters= decodeURIComponent(escape(utf8bytes));
This snippet of code shows how to do Synchronisation or HTML tag replacement
-My problem is i want to synchronise of tags between 2 HTML document
Issue
-Source.htm
my source.htm has this tag
<xml id=“STATIC_CRITERIA_“>
<fields>
<field fieldID=“OPEN_FLAG“ displayType=“checkboxGroup“ searchType=“checkboxGroup“ underlyingType=“int“ />
<field fieldID=“PARTITION“ displayType=“dropdown“ searchType=“profile“ profileID=“SU_PARTITIONS“ underlyingType=“int“ />
<field fieldID=“TEMPLATE_IND“ displayType=“checkbox“ searchType=“checkbox“ underlyingType=“int“ />
<field fieldID=“INCLUDE_DELETED“ displayType=“checkbox“ searchType=“checkbox“ underlyingType=“string“ />
</fields>
</xml>
-Target.htm has this tag
<xml id=“STATIC_CRITERIA_“>
</xml>
So now the problem is how do I fill the gap in XML tag in target.htm with the value from mySource.htm. We can do this using regex and it’s very simple
string originalDocument = Load(“c:\\MySource.htm”);
string syncDocument = Load(“c:\\Target.htm”);
MatchCollection mc = Regex.Matches(originalDocument, “<xml([ ]?.*?)>(.*?)</xml>”, RegexOptions.Singleline | RegexOptions.IgnoreCase);
foreach (Match m in mc)
{
string token = “<xml{0}>”;
syncDocument = Regex.Replace(syncDocument, String.Format(token, m.Groups[1].Value) + “(.*?)</xml>”,
String.Format(token, m.Groups[1].Value) + m.Groups[2].Value + “</xml>”,
RegexOptions.Singleline | RegexOptions.IgnoreCase);
}
MatchCollection is used to return all the instances of that regular expression (e.g you might have multiple XML tags with different ID)
What does this tag means
“<xml([ ]?.*?)>(.*?)</xml>”
([ ]?.*) means that I don’t care whatever after it (e.g it can be ID or attributes etc). this is the first parameter that we stored on variable
(.*?) means that whatever inside the tag are captured into the second parameter that we stored on variable
You can access the first variable (e.g any attributes after the XML) by doing
m.Groups[1].Value
you can access the value inside the xml bracket by using
m.Groups[2].Value
so what contains in
m.Groups[0].Value
it contains the whole xml tag that we extracted using regex
then we can use regex.replace method to replace the tag in target html. When you replace the tag you need to replace the whole xml tag. You can’t just replace the inner part of it
foreach (Match m in mc)
{
string token = “<xml{0}>”;
syncDocument = Regex.Replace(syncDocument, String.Format(token, m.Groups[1].Value) + “(.*?)</xml>”,
String.Format(token, m.Groups[1].Value) + m.Groups[2].Value + “</xml>”,
RegexOptions.Singleline | RegexOptions.IgnoreCase);
}
You need to explore the file in your iphone, you can use SSH or you can use this tool i-FunBox (it’s free at http://i-funbox.com/)
Please navigate to
/private/var/mobile/Media/iTunes_Control/iTunes
and rename folder iTunes_control to iTunes_control2 (or BAD)
When you connect to iTunes then it will ask you to configure your ipod then
I’ve renamed it, connect to iTunes and iTunes will recreate a new iTunes_Control database (hence I deleted iTunes_Control2 folder)
I would like to transfer hundred millions of records between table in different database server. I tried to use DTS export/import and it’s not fast enough for my needs but i forget that there is a BCP command in SQL which is SQL Server format file.
The speed in my local machine is (22795.13 rows per sec)
Sample of the command: (You need to run it in command prompt), you can find bcp.exe in folder (C:\program files\Microsoft SQL Server\100\Tools\Binn) – The 100 is for SQL Server 2008, for SQL server 2005 it’s 90
Sample
1. You need to generate the BCP File from the source table
bcp MyDatabase.dbo.MyTable out C:\BCP_MyTable -n -S localhost -T -e[BCP_MyTable_ERROR]
*Using -T is for trusted connection
2. You need to import the BCP file to the destination table
bcp MyDatabase.dbo.MyTable in C:\BCP_MyTable -n -S localhost -T -e[BCP_MyTable_ERROR]
for further command line reference click here
*UPDATE:
you can configure your server to to reduce the amount of transaction log during bulk copy/insert transaction by executing
EXEC SP_DBOPTION MyDatabase, ‘SELECT INTO/BULKCOPY’, TRUE
bcp MyDatabase.dbo.MyTable in C:\BCP_MyTable /b 20000 -n -S localhost -T -e[BCP_MyTable_ERROR]
What I did was to add extra parameter of /b and the number 20000 (you should play around with the number to see the best one fit your situation) after it means the number of the records per transaction. Please be careful if you don’t put /b parameter, sql server by default will commit all the records at once. but if you put /b parameter then it will commit the transaction per x amount of records specified. If you transfer large data, you shouldn’t commit all at once because it will take sometime. In my case I transferred 18 millions of records
I’d recommend you to save the BCP file and copy the file over if it’s in different server because you need to be careful with the bandwidth of the network and the risk if the network connection is interrupted
I had a problem where I need to restore database using shared folder on the network. I tried to copy it locally to my local harddrive but then the connection is not stable enough. Hence I decided to create a script
Single Media
USE MASTER DECLARE @fromdatabase varchar(50) DECLARE @todatabase varchar(50) DECLARE @sql as nvarchar(4000) DECLARE @BackupPath as nvarchar(250) /***************************************/ /* Change this string to match the database name you want to create a backup of */ Set @fromdatabase = 'DailySupport-1' Set @todatabase = 'MyDatabaseName' /***************************************/ /***************************************/ /* Which db server are you using? */ /***************************************/ Set @BackupPath='\\sharednetwork\SQL\DatabasesBackup\' /***************************************/ /***************************************/ /** Kill off any existing connections **/ SET @sql = ' use master' SET @sql = @sql + ' EXEC sp_KILLSPIDS ' + @todatabase + ';' Print @sql EXEC sp_executesql @sql /** Perform the restore **/ SET @sql = 'RESTORE DATABASE ' + @todatabase SET @sql = @sql + ' FROM DISK = N''' + @BackupPath + '' + @fromdatabase + '.bak''' SET @sql = @sql + ' WITH FILE = 1,NOUNLOAD, REPLACE, STATS=10 ;' Print @sql EXEC sp_executesql @sql
Multiple Media(Sometimes the backup source is stripped multiple files hence if you try to run it with above script you will get this error “The media set has 2 media families but only 1 are provided. All members must be provided.”)
USE MASTER DECLARE @fromdatabase varchar(50) DECLARE @fromdatabase2 varchar(50) DECLARE @todatabase varchar(50) DECLARE @sql as nvarchar(4000) DECLARE @BackupPath as nvarchar(250) /***************************************/ /* Change this string to match the database name you want to create a backup of */ Set @fromdatabase = 'DailySupport-1' SET @fromdatabase2 = 'DailySupport-2' Set @todatabase = 'MyDatabaseName' /***************************************/ /***************************************/ /* Which db server are you using? */ /***************************************/ Set @BackupPath='\\sharednetwork\SQL\DatabasesBackup\' /***************************************/ /***************************************/ /** Kill off any existing connections **/ SET @sql = ' use master' SET @sql = @sql + ' EXEC sp_KILLSPIDS ' + @todatabase + ';' Print @sql EXEC sp_executesql @sql /** Perform the restore **/ SET @sql = 'RESTORE DATABASE ' + @todatabase SET @sql = @sql + ' FROM DISK = N''' + @BackupPath + '' + @fromdatabase + '.bak''' SET @sql = @sql + ', DISK = N''' + @BackupPath + '' + @fromdatabase2 + '.bak''' SET @sql = @sql + ' WITH FILE = 1,NOUNLOAD, REPLACE, STATS=10 ;' Print @sql EXEC sp_executesql @sql
This article is demonstrating how to wire up an enter key into a textbox. For example you have a search text box where you press enter then it will click go button and at the same page you have another textbox where you want to do another button click when you press the enter which means it’ is not necessary to post the page. This java script is used to capture the key event of enter and execute the LinkButton and ASP.NET button Click Event on the server side. Please add this javascript to your javascript common library or add this to your master page. This piece of code works in Firefox as well
function ButtonKeyPress(evt, thisElementName)
{
if(evt.which || evt.keyCode)
{
if ((evt.which == 13) || (evt.keyCode == 13))
{
// alert('post back href: ' +document.getElementById(thisElementName).href);
if (typeof document.getElementById(thisElementName).href != 'undefined')
{
location = document.getElementById(thisElementName).href;
}
else
{
document.getElementById(thisElementName).click();
}
return false;
}
}
else
{
return true;
}
}
And add this to your .NET code behind on the page load
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not Page.IsPostBack Then
If (User.Identity.IsAuthenticated) Then
Response.Redirect("frmTimeMain.aspx")
End If
txtGUID.Attributes.Add("onkeydown", "ButtonKeyPress(event, '" + lnkSubmit.ClientID + "')")
txtPassword.Attributes.Add("onkeydown", "ButtonKeyPress(event, '" + lnkSubmit.ClientID + "')")
End If
End Sub
I’ve a case where I have an ASP.NET calendar that has a page load method that automatically select a date when it’s loaded. I also have an event defined for Selected_Changed which will be triggered only when the user select any other date other than pre-selected date on the load
Private Sub ctlCalendar_SelectionChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles ctlCalendar.SelectionChanged
If (Not String.IsNullOrEmpty(CalendarPreviousPage)) Then
BaseCalendar.SelectedDate = ctlCalendar.SelectedDate
Response.Redirect(CalendarPreviousPage)
End If
End Sub
But how do I wire up an event or when the selecteddate being clicked?You can use DayRender event and attach it to a javascript in this case I want to go back to previous page. BaseCalendar.Selected date can be any date where you want to set up/wire up the logic
Private Sub ctlCalendar_DayRender(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.DayRenderEventArgs) Handles ctlCalendar.DayRender
Dim d As CalendarDay
Dim c As TableCell
d = e.Day
c = e.Cell
If (BaseCalendar.SelectedDate.Value = d.Date) Then
c.Attributes.Add("OnClick", "history.go(-1)")
End If
End Sub