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here i am giving my code which basically save image to gif file.
System.IO.MemoryStream ms = new System.IO.MemoryStream(imageBytes);
System.Drawing.Image img = System.Drawing.Image.FromStream(ms);
img.RotateFlip(System.Drawing.RotateFlipType.Rotate270FlipXY);
img.Save(fileName);
ms.Close();
here imageBytes hold byte of data and this code save whole data to a .gif file.
but i want know how can i save image with above code specifying dimension as a example 640*480.
so plzz manipulate my code in such a way as a result image can be saved with size called 640*480.
plzz give me a sample code or manipulate my code. plzz help urgent.
tbhattacharjee
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I have tried like this,
Update following in function you have already. Sorry, the code is in VB.NET.
Dim myCallback As Drawing.Image.GetThumbnailImageAbort = New Drawing.Image.GetThumbnailImageAbort(AddressOf ThumbnailCallback)
Dim myBitmap As Drawing.Bitmap = New Drawing.Bitmap(img)
Dim myThumbnail As Drawing.Image = myBitmap.GetThumbnailImage(800, 600, myCallback, IntPtr.Zero)
myThumbnail.Save(IO.Path.Combine(Server.MapPath("."), "test.jpg"))
And also add the following callback function.
Public Function ThumbnailCallback() As Boolean
Return False
End Function
Reference: http://msdn2.microsoft.com/en-us/library/system.drawing.image.getthumbnailimage.aspx[^]
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You can apply ScaleTransform opertaions to your image through the use of the Graphics object (Held within the System.Drawing namespace). The Graphics object is primarliy used for GDI+ drawing operations but also includes a number of transformation methods that should do what you require. You simply need to work out the required scale factor i.e. 480 / img.Height and then apply this using the Graphics object that has been created from your image.
Search for ScaleTransform with GDI+ and you should fined a load of articles on the subject.
Clean code is the key to happiness.
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I have shared a few tips on System.Drawing API here:
http://www.dotnetspider.com/kb/Article3446.aspx[^]
Check out whether this is able to address your requirement also.
Vasudevan Deepak Kumar
Personal Homepage
Tech Gossips
A pessimist sees only the dark side of the clouds, and mopes; a philosopher sees both sides, and shrugs; an optimist doesn't see the clouds at all - he's walking on them. --Leonard Louis Levinson
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identity impersonate="true" username="****" password="****;<br mode=" hold="
i'm allowing users to upload files to a specified folder the application is working offline greatly
but when i uploaded it it requests the username and password of the domain
so i added the identity impersonate="true" ......
but it gives the error :Parser Error Message: Could not create Windows user token from the credentials specified in the config file. Error from the operating system 'Logon failure: unknown user name or bad password.
Any help please
Many thanks identity
modified on Tuesday, January 29, 2008 5:01:45 AM
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Are you using Forms or Windows Authentication? if so you may need to use the location element to allow anonymous access to your upload folder. Links below:
MSDN - location Element [^]
MSDN Magazine[^]
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Hey Guys,
I am working on benchmarking the performance of different web technologies including ASP.NET. In a particular case I need to calculate page load time querying 10,000 rows of data (and more) from a database. As a test, I have set a page that includes a Repeater that shows for each item an image (only path stored in db) as well as a description text.
I have used DataTable/DataReader to bind the repeater as well as datasource control. My objective is to use the best method that shows the best of ASP.NET which is why I am posting in this forum to benefit from everyone's experience. Do you recommend a different way to bind a repeater with that objective in mind?
I appreciate everyone's help.
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I think you have selected proper control to show data on the page. As there is no need to modify/edit the data repeater is the best choice rather than girdview. As per my knowledge using repeater is best choice
i am putting this discussion in my watchlist 
Thanks and Regards
Sandeep
If If you look at what you do not have in life, you don't have anything,
If you look at what you have in life, you have everything... "
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Thanks for your input. The choice of control was straight forward but thats not the case for the binding method.So I am looking forward to everyone's input.
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To really improve performance you'll probably want to use a binding source that loads asynchronously so you don't have to wait before all the data is in memory before you start data binding.
I just had this crazy idea of a DataReader wrapped in an IEnumerable< DataRow > iterator yielding out DataRows as fast as they come in.
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Very interesting idea Mark, I have a question if you may: Asynchronous Binding will not improve performance in the sense that the data binding will not complete faster than the traditional non-Asynchronous methods right? The advantage Asynchronous data access provide is that the page will be more user friendly as users will not have to wait until the binding process ends as you mentioned. But this is definetly an Advantage ASP.NET have over PHP for example as I dont recall PHP supports Asynchrounous calls I have to re-check to be sure.
Please correct me if I am wrong.
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It may complete faster - I assume that when the server is retrieving the recordset its not fully utilized, and so probably could benefit from starting to databind the early records that come through.
Not sure if this would actually be worth doing - but the potential is there.
I'm talking about fetching the data async on the server for a single page execution. I just realised you might be talking about having the page be rendered, sent to the client and then asked to fetch the recordset. This might look smooth to the client, but the total time will undoubtably be greater - due to the amount of processing done client side (in javascript).
PHP probably does have some kind of async support - but I'm not a PHP developer.
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hi,
I ve created a VS-2005 New --> Website. I want to use the .dll for code verification using Fxcop. But I coud not find any.Dll file (or Bin folder) even after compilation. 
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you need to publish your code which will generate assemblies for your code.
Link[^]
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create a new project.
and select a classlibraryfile
and write all code there and build.
that generate a dll file.
copy paste that dll in you project bin directory and add refrence.
and include the namespace .
and use the required function.
rajeev kumar sharma
vri software pvt. ltd.
new delhi India
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Hi
I ave a dropdownlist which is populated from a database
However how do i set the default value of the dd as Select
thanks in advance
cheers
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use the below code
dd.Items.Insert(0, "Select");
Bhanu
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Hi
Sorry that did not work, the value did not show in the dropdownlist
Is it because I am using asp:sqldatasource to populate it?
thanks so far
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Totaly depends where are you writing the suggested lines
Could you provide the code
after binding the datasource just insert select string at 0 index it's simple
Thanks and Regards
Sandeep
If If you look at what you do not have in life, you don't have anything,
If you look at what you have in life, you have everything... "
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Write that line of code after binding the data to dropdownlist
Bhanu
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If you are using SQLDataSource, I think you'll need to add the code provided in the Databound event of the dropdownlist
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i think no need to to have databound event just need to insert the string at perticular index
Thanks and Regards
Sandeep
If If you look at what you do not have in life, you don't have anything,
If you look at what you have in life, you have everything... "
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sure, all you need is to insert the string at the particular index after the data binding have occured.With the databound event you can trap the binding process.
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If DataSet.Tables.Count > 0 Then
dtTable = DataSet.Tables(0)
objList = CType(drpDropDown, System.Web.UI.WebControls.DropDownList)
With objList
.Items.Clear()
.DataValueField = "value"
.DataTextField = "text"
dtRow = dtTable.NewRow()
dtRow(0) = -1
dtRow(1) = "--Select--"
dtTable.Rows.InsertAt(dtRow, 0)
.DataSource = DataSet
.DataBind()
End With
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Hi all
thanks for the replies, wish my other posts got this many repliers!!
I had to add in 'select' into my select statement so it set the value as select
cheers
thanks
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