The error message is "Invalid parameter used.", but when I change it to ..CompressionLZW it works. All the examples that I found were written in VB.NET and they look simular to my function below. private bool SaveTIFF(ref string outputFile, ref Bitmap bmp, bool bAdd) { try { System.D...more >>

Hi, I'm testing an app in a virtual pc (Win 98 SE, framework 1.1 SP1), an i'm getting "a generic error occurred in gdi+" in screens where there's a groupbox or a datagrid. if i remove then, it works fine. The error messages are bellow. Is this a "real" error or is happening just because it'...more >>

Hi,My friends, i am a boy from china, i meet a problom in my program.i use this code to write a word on form. how can i get the word's size? i know the API function named DrawTextEx can get it because the Rectangle parameter is [in] /[out]. private void Form1_Paint(object sender, Syste...more >>

Drawing Gurus.. Ok, I am really new to System.Drawing and I have a web app that lets users upload images (gif, bmp, jpg). If the image is greater than say 75px by 75px, I want to resize it down to that size BEFORE I save it to the database. I have been pointed in the GetThumbNail direction ...more >>

I need a control that I can draw on. I want it to have a ruler on the top and on the left which I will also draw, but when I scroll the view horizontally for example, I want only the top ruler to scroll along with the view. When I scroll vertically, I want the horizontal ruler across the top to ...more >>

hello I'm creating a set of custom controls but i have a problem. My controls have a property called MOUSECOLOR that depends from backcolor property. When i add a control in the form My Mousecolor property must be clearly of backcolor property.(CONTOLPAINT:LIGHTLIGHT(mybase.backcolor)) I ha...more >>

I have a picturebox on my VB.NET form. The picturebox size mode is set to stretched. I then load an image into that form and display it. As the user moves the mouse over the form, I want to get and display (in the status bar) the image coordinates of the mouse location. However, if I use the pic...more >>

Hi, I'm writing an owner-draw listbox and want to have some images in it. So, I load png files into image list and now: when I try to draw them 'normaly' (without double-buffering) everything is ok, but when I create an offscreen bitmap and draw my images on it I get black pixels inste...more >>

Hi, I'm running into a problem when I place a transparent control onto a form with a background image. The control is a marquee, so the client rectangle gets updated 50-100 times per second. The problem I'm running into is that when the background image is large, the CPU is running at 100%....more >>

Does anyone have any idea why I can't get a pixel-value of 255 returned in the code below? Any color-value from 0 up to 254 is returned correctly, but any color-component of 255 returns zero. ie. bright white pixel would return 0,0,0 with the function below: The color (234,123,255) returns (2...more >>

This seems like a really stupid question, but here it goes........ is there a command to draw a single pixel? The closest I can get is to draw a line that is 2 pixels wide, or do create another image that's 1x1 with the color of the pixel, then do a DrawImage to insert that image into the ...more >>

Hi, I have an 8bpp greyscale tiff file (created using a C++ library call tiflib) that causes out of memory exceptions when opened using Image.FromFile in GDI+. I can open it with other programs like Irfanview and Imaging. If I save it as a 24bpp using one of these programs, GDI+ will open i...more >>

I'd like to save PNG using 16 bits, instead of the default 24 bits. It looks like it's not possible... The following page on GDI+ shows that the PNG encoder accepts no parameters: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/gdicpp/GDIPlus/usingGDIPlus/usingimageencodersand...more >>

OK, my previous message news:uIukmiPGFHA.1932@TK2MSFTNGP14.phx.gbl was probably a bit too long... (subject: "[Bug Suspicion] So, <any_gdi_object>.Dispose() does ... what exactly?", sent a few hours ago) So here is, in a more compact form, my problem: I create Icon objects out of owner-draw...more >>

- Is there a way to have a greyscale view of a Bitmap alpha channel, just like the alpha channel palette in Photoshop. - Like in Photoshop, is it possible to draw in an alpha channel using greyscale values of the Brush, leaving the alpha values of the Brush for blending brush fills with the or...more >>

Hi, I have developed a very small Windows application which creates a new Icon using .NET GDI+ every second (or every minute, that's user-definable). I need to do this because my "drawing surface" is a system tray icon so I can't just paint to a control or something. However, whenever I rep...more >>

Is there a way to determine what the size of a GDI+ string output would be prior to drawing? For example, If I have something like this: Dim fnt As New Font("Times", 12) Dim drawFormat As New StringFormat drawFormat.LineAlignment = StringAlignment.Center drawFormat.Alignment = StringAlignme...more >>

Hi newsgroup, I am developing an application which has to save an tiff-image, which in turn can have multiple pages. When using the following code, however, only the first page of the tiff-file gets saved: public void SaveImage(byte[] b, string filename) { System.Drawing.Bitmap image = ne...more >>

I've got a WIndows Forms usercontrol that I'm drawing myself. I needed scroll bars so I've put them on the control at design time and am showing and hiding them when needed. My problem is that when I mouse over one part of the control I change the cursor to an IBeam and when I then enter a s...more >>

Hi all gurus, pls can anyone tell me how2 achieve a "Star wars" effect? Or better, do you know some component for me to help? TIA *** Sent via Developersdex http://www.developersdex.com *** Don't just participate in USENET...get rewarded for it!...more >>

My MenuItems are set up to be owner drawn. Everything is working perfectly fine for me but when I have a MenuItem that has its own child menu, Windows draws the submenu-indicating-arrow anyways. Surely this is not intentional? Doesn't owner draw mean I do all the drawing? Sample project ...more >>

hiii i have made a class MyObject. It has a draw function. I am able to draw all the objects on the form. I am able to save them to a file and read them also. Now the problem is that i want that if a user clicks on any of the object something should happen. i have tried a lot but failed. pls...more >>

G'Day all, Ok so I can draw a rectange (with borders and fill whatever) to the upper left of an image easily, but I cant work out how to draw the rectange to the upper right of an image? Keeping in mind that the image will change size so there has to be another way to this without using x/y c...more >>

I haven't received an answer to my question of a few days ago regarding a flipped treeview control posted in the dotnet.framework.windowsforms.control newsgroup, so I thought I'd ask it again. Sorry about the cross-posting, but I'm getting desperate as the drop-dead date, the 25th of this mon...more >>

How i can retrive data from spreadsheet and draw an chart using office 2003 in vb.net?please its very urgent From http://www.developmentnow.com/g/20_2005_1_0_0_0/dotnet_framework_drawing.htm Posted via DevelopmentNow Groups www.developmentnow.com/g www.developmentnow.com...more >>

I need to rotate text that may have multiple lines and contain multiple fonts. The best thing I could think of was to rotate a RichTextBox but I can't seem to do that. I could draw the text using GDI+ but all the examples I have seen only use one font. Seems that it may be difficult to calculate w...more >>

Hi, I am trying to drag a rectangle throughout a form for a graphical design application. The problem is that when I implement DrawRectangle or ControlPaint.DrawBorder, the rectangle is obscured by other controls as it passes over them. The only solution I can think of is to intercept OnPa...more >>

Hello, I am trying to "add" these enumerations in a way that would allow me to figure out what the desired rotation is. For example, if a user chose to rotate an image 90 degrees and flip about the X-axis then ideally I would do something like: RotateFlipType rotDesired = RotateFlipType.R...more >>

Can anyone tell me what is wrong with this code? I want to get the ocntents of the JPEG image into a byte array. After the theStream.read call, the theBytes array is still filled with all nulls. and iCount is zero. I used this article (http://msdn.microsoft.com/library/default.asp?url=/lib...more >>

The most ugly feature (actually until now the only ugly feature) of gdiplus is vissible then creating custom drawn grid. Why in a hell the same text is drawn using different spacing. I know about antialias (ugly at smaller font sizes), ClearType (ClearType on my notebook sometimes helps if I...more >>

I have an interesting quandary. I have developed a program in VB.Net to extract an icon resource from an exe/dll or from an ico file and enumerate its formats (16x16,256 color;32x32,true color;etc.). It reads out the structures all the way down to the ICONIMAGE structures. I have this represen...more >>

Hello I have a Windows Form in which i am loading 2 images at run-time. I draw some text on the images, set the background picture of the pictureboxes to the images Everything fine. If i hide the form and show the form the images (hosted in the pictureboxes located on a panel) do not ...more >>

Hello, do you know how generate picture in jpeg2000 format ? I am searching for a free library, but is it possible ? Thanks ...more >>

Hi all. I have an application to draw and design different documents, that supports linking and embedding of other documents (like, for instance, Corel Draw or Word). Then, the user can print their designs "WYSIWYG", so I load the external document inside an OLE document container control (VB6),...more >>

Hi, I was wondering what is the best way to implement a 3D view of a simple grid of lines using basic GDI+ and C#. The grid is supposed to represent land and I will place objects on the grid. I will need to be able to change perspective views of the grid. Any help would be appreciated. ...more >>

I am trying to use DrawString to draw a string that contains normal and superscript text. To do this I have to use DrawString several times changing the font size and position for the superscript part. This works apart from the spacing. I use MeasureString on the previous string to work out...more >>

Hi guys. is it possible to embed a font (which is probably not installed on the client machine and I dont want it to be) in the assembly (the font file itself or anything else) and then use that embedded resource for creating System.Drawing.Font objects? Thanx, Picho ...more >>

If I use ColorTranslator.FromHTML("#ff0000"), I get Color.Red returned. However, if I use ColorTranslator.FromHTML("Red"), I get RGB=0x0 returned (silent failure). The documentation suggests that HTML color names should be valid inputs, and I swear that I've used this in the past. Has thi...more >>

Hi all, I have written an Ecard application which takes text input from the user on one .aspx page and renders the message to a template .jpg and displays the results on a 2nd .aspx page. The trouble is that my fonts render fine on my local host machine but very jaggie on the server. IIS 5.1 ...more >>

Hi, I have the following code: Protected Overrides Sub OnPaint(ByVal pe As System.Windows.Forms.PaintEventArgs) MyBase.OnPaint(pe) 'Add your custom paint code here Dim g As Graphics = pe.Graphics g.FillRectangle(Brushes.White, Me.ClientRectangle) g.ScaleTransform(m_nZoomFactor, ...more >>

I have rectangle and circle which intersect on the drawing surface. I want to fill in the intersecting region. How to calculate the intersecting region the best way? Thanks in advance KDV...more >>

Greetings, I am working with large bitmaps of 13,000x18,000 pixels and need to do some cropping at minimum. The code I use is fine for smaller bitmaps but does not work for the large size bitmap, and gives an invalid parameter error on the creation of the new Bitmap(**). The code works fine ...more >>

Hi, How to get the mouse wheel event in a WinForm control ? Thanks Best regards *** Sent via Developersdex http://www.developersdex.com *** Don't just participate in USENET...get rewarded for it!...more >>

I'm currently drawing in a panel a series of polygons which get their points from an Array. I've created a button which deletes the data for one of the polygons from the array, and then calls the panels Invalidate method. However this clears the panel, and doesnt redraw any of the other polygo...more >>

Hi gurus... Houston we have a problem? Im printing out the contents out a RichTextBoxEx and it works great. Its fast and it does everything I want it to do BUT when I'm finished printing out the content I want to get the position ( Point) where the function FormatRange but the last char. I...more >>

Not quite sure how to ask this. I'm new to graphics programming. I'm trying to figure out how to only open part of an image. I have an image with about 4 or 5 tiles. Each tile is 32x32px. I want to load this 'tile set' into an array so that I can use it in my program. This way I don't have to ...more >>

I need to write a 'simple' editor that will allow me to drag/drop different objects. Basically, I need it to function like a form editor similar how you would design a form in Visual Studio or Access, or work how Adobe Illustrator works where you can have handle(s) on the selected object so it ...more >>

I would like to programatically on install set TIF files to open with my ..NET program. I have heard this is hard to do. Does anyone have any examples of this? Thanks, Becker ...more >>

I have a TIFF that is CCITT4, i open it in my program, stamp some text on it (thanks Bob Powell for the GDI FAQ which helped on this). I load my image into a bitmap for my editing. I now need to save it and I am trying to do this specifying the encoder parms for compression to make it CCIT...more >>

Hi, Is it possible to draw onto a graphics object a vector? I'm asking because I have artwork created in Adobe Illustrator which I would like to save and draw in .NET. I've tried saving it as a BMP but it still comes out very pixelized when I draw it. What about WMF files which Microsof...more >>