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Displaying a System.Drawing.Bitmap in a WPF Image control

Posted By:      Posted Date: August 30, 2010    Points: 0   Category :WPF
How would I convert a System.Drawing.Btimap into a comparable WPF image control so I can display in on my WPF window? Thanks

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System.Drawing.Image.Fromfile is not working


I am trying to get the height and width of the image dynamically.  The reason is I am loading multiple images using code, where the image name is from the database. 

Here is my code:

in the ascx page, I have an asp image

<asp:image id="imgInfo" runat="server" /> 


In the code behind

string ImagePath = "~/products/img/" + dataviewImgInfo[0]["imgName"].ToString();

System.Drawing Image imgProd = System.Drawing.Image.FromFile(ImagePath);

if(imgProd.Height > 200)

imgInfo.Height = 100;




imgInfo.Height = 200



WHen I run this page I am getting the folloiwng error

Bitmap to Image Control - ImageUrl


 This is my first attempt at using the drawing features of asp.net.  I just want to start simple, and create a single color bar based on a value for a single graph.  I wrote this so far, but I can't figure out how to take the bitmap I just created, and apply it to the Image Control. Do I have to save the file first, and then reload it.

Plus, my box keeps coming out pure black, I trying to fill the box with a color. 

This is part of a web custom control, in which I dynamically created an Image Control. I want to apply the bitmap I made to the image control. 


Dim imgGoogle As Image
imgGoogle = New Image
imgGoogle.ImageAlign = ImageAlign.AbsMiddle
imgGoogle.ImageUrl = cs.GetWebResourceUrl(rsType, "ice5software.BotCatcher.Google.gif")
Private Sub DrawBarGraph_Google(ByVal BarValue As Integer)

	Dim objBitmap As System.Drawing.Bitmap
	Dim objGraphics As S

Converting a System.Windows.Control.Image object to byte array.

Hi i need to convert a specific System.Windows.Control.Image object into an (int) array, because i'm trying to convert a silverlight application into a wpf project. private void createGi02GradBrush()<br/> {<br/> WriteableBitmap oWriteableBitmap = new WriteableBitmap(256, 256);<br/> Image oImage = new Image();<br/> oImage.Arrange(new Rect(0, 0, 256, 256));<br/> oImage.Measure(new Size(256, 256));<br/> oImage.Source = new WriteableBitmap(256, 256);<br/> Gi02GradShaderEffect oGi02GradShaderEffect = new Gi02GradShaderEffect();<br/> oGi02GradShaderEffect.pArray = oPImageBrush;<br/> oGi02GradShaderEffect.gi1GradArray = oGi1GradImageBrush;<br/> oImage.Effect = oGi02GradShaderEffect;<br/> oWriteableBitmap.Render(oImage, null);//here<br/> oWriteableBitmap.Invalidate(); <br/> this.oGi02GradImageBrush = new ImageBrush();<br/> this.oGi02GradImageBrush.ImageSource = oWriteableBitmap;<br/> } I've found some similar topics however Image object is not the same and most of its methods aren't available. Here I'm rendering a writablebitmap with a given Image object, but in wpf we need an array. oWriteableBitmap.Render(oImage, null); Any idea? Thanks. Joseph.  

System.Drawing.Image.FromFile crashes for tiff files on 64bit system


The following pice of code runs fine on my development machine (win7, 32bit) but ends with Exception on the server (Win2008R2, 64bit).


        static void Main(string[] args)


            Image image = Image.FromFile(args[0]);





The exception will be thrown for TIFF files (from other sources) but ie not for PNG files.

I was wondering why the test program above works fine on my Win 32bit machine with .NET 4 but not on my 64bit machine with .NET 4.

Any help appreciated.



How to Convert System.Drawing.Image Variable to Byte variable



I got a variable of type System.Drawing.Image and need to convert it to a variable of type byte so I can store the image in the database. Can someone show me how to do that in VB.NET code.

Thanks alot

Unable to cast COM oject of type 'System.__ComObject' to class type of 'System.Drawing.Bitmap' .

 private void DirectXViewer_DragDrop(object sender, DragEventArgs e)


   mousePressedFlag = false;



    Object obj = e.Data.GetData(typeof(Bitmap));





      Bitmap image = (Bitmap)((Bitmap)obj).Clone();

      RenderImage = image;



     catch(Exception ex)








private void DirectXViewer_MouseMove(object sender, MouseEventArgs e)


   if (mousePressedFlag)


    if(cacheBitmap != null)

     this.DoDragDrop(new Bitmap(cacheBitmap), DragDropEffects.Copy);




Hi All,

I try to d

Get Image from HTTP in a System.Drawing.Image


How can i get a Image that exitsts on the WWW, into my project.
Normally i get a image on this way:


        System.Drawing.Image ImgWatermerk = System.Drawing.Image.FromFile(PNGPath);


But right now the image is remote like http://www.google.nl/google.jpg


NotSupportedException System.Drawing.Bitmap


I have a VB.Net program which is running on CF MobilePC 2003.  In the form creation logic (generated by VS), the creation of a bitmap on the form (in a PictureBox) gets the following exception:

Me.pbStop.Image = CType(resources.GetObject("pbStop.Image"), System.Drawing.Image)


System.NotSupportedException was unhandled



    at System.Resources.ResourceReader.LoadObjectV2()

System.Drawing.Bitmap.SetResolution is completely broken on Windows 7


Bitmap.SetResolution does nothing on Windows 7. It works fine on XP and Vista. This code demonstrates the problem:


            foreach (string file in Directory.GetFiles(@"C:\Temp\input"))


                string newFile = "";

                using (var bitmap = (Bitmap)Image.FromFile(file))


                    bitmap.SetResolution(200, 200);

                    newFile = Path.Combine(@"C:\Temp\output", Path.GetFileName(file));

                    bitmap.Save(newFile, ImageFormat.Png);


                using (Image image = Image.FromFile(newFile))



System.Drawing.Image.FromStream() ArgumentException: Parameter not valid.


I am getting an ArgumentException: Parameter is not valid.

Does anyone know what's wrong with my code here?

        ImgService obj = new ImgService();

        byte[] data = obj.ShowImg(6);

        Int32 offset = 78;

        MemoryStream memStream = new MemoryStream();

        memStream.Write(data, offset, data.Length - offset);

        System.Drawing.Image img = System.Drawing.Image.FromStream(memStream);

        img.Save(Server.MapPath("image.jpg"), System.Drawing.Imaging.ImageFormat.Jpeg);


        Image1.ImageUrl = Server.MapPath("image.jpg");


        ImgService obj = new ImgService();

        byte[] data = obj.ShowImg(6);
        Int32 offset = 78;

System.Drawing.Image.FromStream() get a Parameter is not valid


Anyone help fix Parameter is not valid errors , when i tried rename and save a file using fileupload to server

my code here :

if (fupImage.PostedFile.FileName != "")
                if (!Utitlties.Instance.CheckImageFileType(fupImage.PostedFile.FileName))
                    lblMessageForfupImage.Visible = true;
                    lblMessageForfupImage.Text = "Image file only accept *.jpg, *.png, *.bmp, *.gif Extensions !";
                    evt.ImageURL = Utils.Instance.SaveImage(fupImage.PostedFile.InputStream, fupImage.PostedFile.FileName, true);

anh here is methos SaveImage :


public string SaveImage(Stream stream, string filename, bool IsImageFile/*, bool CreateThumImage*/)
        string ImgUrl = string.Empty;
        string d = Utitlties.Instance.MakeFolderName();
        System.Drawing.Image img;
        string dirToSave = HttpContext.Current.Server.MapPath("Images/Uploads") + "/" + d + "/";
        string dir = "Images/Uploads/" + d + "/";
            if (IsImageFile == true)

image inside custom server control



I want to use an image inside a Custom Web server control ! 

Do I need to use Web.resources ? if so , how to do ?



Hi there,


 I am doing one task on asp.net graphics. i would like to a form that let the user choose the color code from the color picker.

inside my backend code, i can get the color code and convert to the system.drawing.color.



Dim col As System.Drawing.Color = System.Drawing.ColorTranslator.FromHtml("#9932CC")

 Dim Brush As New SolidBrush(col)


but i have some problem in make this col object to alpha color. as i know the .net code that make the system color to become alpha is wrote as like tat :

gr.DrawString(strWatermarkText, wmFont, New SolidBrush(Color.FromArgb(8, 0, 0, 0)), x, y)


May someone share me how to make the color input from form to become alpha color? thanx in advanced. hope to hear from you all soon 


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How to retrieve image from DB with Linq and diplay in Image Control


Hi all-


I'm using the file upload to let the user upload a single file.  Here's the code I'm using to then upload to the DB.  How do I reverse this process and dowload the image into the control for it to display on a different page?

Here's my code for the upload - which I think works but can't confirm until I can see the download since all I see in the DB is "binary data"

'update DB with new Image 
        If FileUpload1.HasFile AndAlso FileUpload1.PostedFile.ContentLength > 0 Then
            'Read the file in to a byte Array.
            Dim filebyte As Byte() = FileUpload1.FileBytes
            Dim fileBinary As New System.Data.Linq.Binary(filebyte)
                Dim c3 = (From c In dc.ProductImages _
                          Where c.userID = userGuid _
                          Select c).FirstOrDefault

                c3.productImage = fileBinary

            Catch ex As Exception
                Throw ex
            End Try
Here's my attempt at the retrieval, which isn't working:
                    Dim currentImage = F

user control derived from System.Web.UI.WebControls.WebParts only fires its OnPreRender and CreateCh


 I have a application which uses webparts.

So my user controls are derived from System.Web.UI.WebControls.WebParts which makes them webparts.

I have everything setup and working fine as far as the personalization and webpart goes... every thing displays and works fine.

Except that 1 of my control needs to do a bit of work in the OnPreRender event and it turns out that event only gets fired when a user is loged in the application.

So lets imagine that an administrator while logged in switched to 'Sharedscope' within the webpartmanager and then has added the usercontrol/webpart 'calendar' to the top webpart zone. This then makes the 'calendar' control viewable by all and any user who visits the page wheter logged in or anonymous.

And this works fine and very well as it is supposed to. However in the 'Calendar' user control which is derived from System.Web.UI.WebControls.WebParts I have an overiden 'OnPreRender' event like this:

Protected Overrides Sub OnPreRender(ByVal e As EventArgs)

If Not Me.DesignMode Then

Me.isloaded = True

' Test for ScriptManager and register if it exists

sm = ScriptManager.GetCurrent(Page)

If sm Is Nothing Then _

Throw New HttpException("A ScriptManager control must exist on the current page.")

EventType clr20r3, P1 devenv.exe, P2 9.0.30729.1, P3 488f2b50, P4 system.drawing, P5, P6 488

Hi,I am facing a strange issue in Visual Studio 2008 Standard SP1, when using WPF Designer (even without using the Designer tab, only XAML tab). Visual Studio crashes very often, without any apparent reason, and in various ways, for example: exits instantly, the IDE displays corrupted UI, when begining compiling it stops responding.There are two new Event Log entries after this: EventType clr20r3, P1 devenv.exe, P2 9.0.30729.1, P3 488f2b50, P4 system.drawing, P5, P6 4889dec2, P7 33d, P8 18, P9 system.outofmemoryexception, P10 NIL. .NET Runtime version 2.0.50727.3053 - Fatal Execution Engine Error (7A2E0F92) (0)Worth mentioning:- computer has Windows XP SP3 with the latest updates installed- it crashes on other computer types too- the project has quite a large number of UserControls - it appears that if opening a XAML file with the XML editor instead, it works ok- on other WPF projects it also works okDoes anyone have an ideea why is this happening and solutions? Thanks
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