Silverlight browser Interaction: computing and expansion of independent storage space of Silverlight users

Overview

ISolatedstoragefile Member
An independent storage area that contains files and directories.

Isolatedstoragefile. getuserstoreforapplication Method
Obtain the User-Defined independent storage used by applications called from the VM domain.
An application in the domain (website) shares a group quota with all other applications in the domain.
This allows multiple applications in the same domain to share a quota. Note that the domain here refers to the virtual host domain (such as Microsoft.com), rather than the application domain.
The default independent storage size of the group quota is 1 MB. To increase the quota, use the increasequotato method.
To obtain the independent storage of all applications in the domain, use the getuserstoreforsite method.

Isolatedstoragefile. Quota attribute
Obtain a value that indicates the maximum amount of available space for independent storage.
This attribute gets the value from the associated quota Group of the storage area. The initial quota is 1 MB, which is shared by all applications in the domain.

Isolatedstoragefile. availablefreespace attribute
Obtain a value that indicates the amount of available space in the independent storage.
This attribute gets the value from the associated quota Group of the storage area. Because the quota may change, the value cannot be cached in the memory, but must be read from the disk directly each time.

Users can create files in an independent space, such as creating and reading files in a Silverlight user independent bucket.

Effect

Click expand space

After clicking yes, the space will change to 4 MB.

XAML code

<Grid X: Name = "layoutroot" background = "white">
<Canvas background = "white">
<Rectangle X: Name = "maximumrectangle"
Width = "1"
Height = "20"
Fill = "# ffffffff"
Stroke = "# ff000000"
Canvas. Left = "1"
Canvas. Top = "5"
Radiusx = "5"
Radiusy = "5"/>
<Rectangle X: Name = "currentrectangle"
Width = "1"
Height = "20"
Stroke = "# ff000000"
Canvas. Left = "1"
Canvas. Top = "5"
Radiusx = "5"
Radiusy = "5"
Strokethickness = "0">
<Rectangle. Fill>
<Lineargradientbrush endpoint = "0.5, 1.35"
Startpoint = "0.5,-0.3">
<Gradientstop color = "# ff54cdea"
Offset = "0"/>
<Gradientstop color = "# ff017328"
Offset = "0.5"/>
<Gradientstop color = "# ff54cdea"
Offset = "1"/>
</Lineargradientbrush>
</Rectangle. Fill>
</Rectangle>
</Canvas>
<Textblock margin = "30" X: Name = "TXT" Height = "20" verticalignment = "TOP"> </textblock>
& Lt; button width = "150"
Height = "30"
Content = "Extended Space"
Click = "button_click"/>
</GRID>

CS code

Public mainpage ()
{
Initializecomponent ();

// Set the rectangle size to indicate the size of the storage space
// Isolatedstoragefile Member
// Indicates an independent storage zone that contains files and directories.

// Isolatedstoragefile. getuserstoreforapplication Method
// Obtain the independent storage of the user range used by applications called from the VM domain.
// Share the group quota between an application in the domain (website) and all other applications in the domain.
// This allows multiple applications in the same domain to share a quota. Note that the domain here refers to the virtual host domain (such as Microsoft.com), rather than the application domain.
// The default independent storage size of the group quota is 1 MB. To increase the quota, use the increasequotato method.
// To obtain the independent storage of all applications in the domain, use the getuserstoreforsite method.

Using (VAR isofile = isolatedstoragefile. getuserstoreforapplication ())
{
// Isolatedstoragefile. Quota attribute
// Obtain a value that indicates the maximum available space of independent storage.
// This attribute is obtained from the associated quota Group of the bucket. The initial quota is 1 MB, which is shared by all applications in the domain.

// Isolatedstoragefile. availablefreespace attribute
// Obtain a value that indicates the amount of available space for independent storage.
// This attribute is obtained from the associated quota Group of the bucket. Because the quota may change, the value cannot be cached in the memory, but must be read from the disk directly each time.
Double usedspace = isofile. Quota-isofile. availablefreespace;
Maximumrectangle. width = (ISO file. Quota/10240) * 2;
Currentrectangle. width = (usedspace/10240) * 2;
TXT. Text = "the user's independent space is:" + usedspace + "kb ";
}

}

Private void button_click (Object sender, routedeventargs E)
{
Using (VAR isofile = isolatedstoragefile. getuserstoreforapplication ())
{
VaR newquotasize = isofile. Quota * 2;
VaR requestaccepted = isofile. increasequotato (newquotasize );
If (! Requestaccepted) return;
MessageBox. Show ("current space: \ n total space:" + isofile. Quota/(1024*1024) +
"M \ n available space:" + isofile. availablefreespace/(1024*1024) +
"M \ n independent storage space:" + isofile. usedsize/1024 + "M ");
}
}
}

Success !!!

Author:Memories of lost youth
Source: http://www.cnblogs.com/lukun/
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