HTML5, Draw Rounded Rectangle on Canvas

Example below will draw rounded rectangle:

function doRoundedRectangle(c,sx,sy,ex,ey,r) {
 var ctx = c.getContext("2d");
 var r2d = Math.PI/180;
 if( ( ex - sx ) - ( 2 * r ) < 0 ) { r = ( ( ex - sx ) / 2 ); } //ensure that the radius isn't too large for x
 if( ( ey - sy ) - ( 2 * r ) < 0 ) { r = ( ( ey - sy ) / 2 ); } //ensure that the radius isn't too large for y
 ctx.beginPath();
 ctx.moveTo(sx+r,sy);
 ctx.lineTo(ex-r,sy);
 ctx.arc(ex-r,sy+r,r,r2d*270,r2d*360,false);
 ctx.lineTo(ex,ey-r);
 ctx.arc(ex-r,ey-r,r,r2d*0,r2d*90,false);
 ctx.lineTo(sx+r,ey);
 ctx.arc(sx+r,ey-r,r,r2d*90,r2d*180,false);
 ctx.lineTo(sx,sy+r);
 ctx.arc(sx+r,sy+r,r,r2d*180,r2d*270,false);
 ctx.closePath();
};

Parameters:
c = Canvas object
sx = Start x position
sy = Start y position
ex = End x position
ey = End y position
r = radius for rounded corners

HttpException: The URL-encoded form data is not valid

An httpexception might be poping up in most of the ASP.NET 2.0 applications where there are lot of user controls on your view. Microsoft security update MS11-100 limits the maximum number of form keys, files, and JSON members to 1000 in an HTTP request. Because of this change, ASP.NET applications reject requests that have more than 1000 of these elements.
HTTP clients that make these kinds of requests will be denied, and an error message will appear in the web browser. The error message will usually have an HTTP 500 status code.


Exception information in Windows event log will contain:
Exception type: HttpException
Exception message: The URL-encoded form data is not valid

ASP.NET 2.0
If your application view reaches over 1000 elements, than you will need to configure this value in your web.config file. And following lines need to be added:

<configuration>
  <appSettings>
    <add key="aspnet:MaxHttpCollectionKeys" value="1000" />
  </appSettings>
</configuration>

You should set the value to your need, and it should be any value over 1000. You can give value under 1000 as well if your application works on it.

ASP.NET 1.1
For .NET 1.1 web applications you will have to set a DWORD in registry. Following is the key:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\ASP.NET\1.1.4322.0\MaxHttpCollectionKeys

JSON Limit
Applications that hit this limit for JSON payloads can configure as follows:

<configuration>
  <appSettings>
    <add key="aspnet:MaxJsonDeserializerMembers" value="1000" />
  </appSettings>
</configuration>

Reference:
http://support.microsoft.com/kb/2661403

Commodo Antivirus, Manually update virus definition

Download the latest full AV database:

For respective CIS version, we have different complete bases.cav:

1. For CIS 4.x
Following link points to latest complete bases.cav always
http://download.Comodo.com/av/updates40/sigs/bases/bases.cav

2. For CIS 5.0
Following link points to latest complete bases.cav always
http://download.Comodo.com/av/updates50/sigs/bases/bases.cav

3. For CIS 5.3 & 5.4
i) Download
http://download.Comodo.com/av/updates51/sigs/bases/bases.cav.z
ii)
Use 7-zip from http://www.7-zip.org/download.html , or your archiver program of choice that can handle 7z archives and unpack it. After unpacking you will have to rename the file to bases.cav.

4. For CIS 5.5
i) Download
http://download.Comodo.com/av/updates55/sigs/bases/bases.cav.z
ii)
Use 7-zip from http://www.7-zip.org/download.html , or your archiver program of choice that can handle 7z archives and unpack it. After unpacking you will have to rename the file to bases.cav.

5. For CIS 5.8
i) Download
http://download.Comodo.com/av/updates58/sigs/bases/bases.cav.z
ii)
Use 7-zip from http://www.7-zip.org/download.html , or your archiver program of choice that can handle 7z archives and unpack it. After unpacking you will have to rename the file to bases.cav.

Activating the download:

1. Save the downloaded file on your computer

2. Reboot in Safe-Mode

3. Open explorer and go to C:\Program files\Comodo\Comodo internet security\scanners and copy the downloaded bases.cav here

4. Reboot your system in normal mode

The 'microsoft.jet.oledb.4.0' provider is not registered on the local machine

On Windows 7 64bit and Windows 2008 64bit system a common error may arise when using Microsoft.jet.oledb.4.0 driver. Applications running in 64bit mode may not be able to access this driver. This is because 64bit version of this driver does not exist.

Solution to this problem is as follows:

1. We use 32bit application, 32bit application will be able to access the ODBC drivers

2. If you are a application developer and need to develop a 64bit application which can connect to csv, excel files, etc using ADO.NET. You should use Microsoft Access Database Engine 2010 which is a small redistributable and available in both 32bit and 64bit versions.


Summary:

Issue:
The 'microsoft.jet.oledb.4.0' provider is not registered on the local machine.
Issue is that Application pool is running in 64bit mode, therefore 32bit Jet drivers not accessible.

Solution:
Microsoft Access Database Engine 2010:
http://www.microsoft.com/download/en/details.aspx?id=13255
Use this provider Microsoft.ACE.OLEDB.12.0 to connect with csv, excel, etc files.