imagelist

I am using a listview control where I am adding Images through ImageList if (dtPhoto.Rows.Count > 0) { foreach (DataRow dr in dtPhoto.Rows) { if (dr["Photo"].ToString() != "") { byte[] barrImg = (byte[])dr["Photo"]; MemoryStream mStream = new MemoryStream(barrImg); imageList.Images.Add(Image.FromStream(mStream)); } } } imageList.ImageSize = new Size(75, 75); lvItem.LargeImageList = imageList; for (int i = 0; i < imageList.Images.Count; i++) { lvItem.Items.Add(dtPhoto.Rows[i]["Name"].ToString() + "\n" + "(" + dtPhoto.Rows[i]["Type"].ToString() + ")", i); } I want to add border to each item in

ImageList should create a copy of all images that are inserted into it. Therefore it should be safe to dispose the originals after adding them to the list. Why does the following testcase fail? Bitmap test = new Bitmap(128, 128); ImageList il = new ImageList(); il.Images.Add(test); Assert.AreEqual(1, il.Images.Count); // OK, image has been inserted test.Dispose(); // now let's dispose the original try { var retrievalTest = il.Images[0]; } catch (ArgumentException) // ... but this Exception happens! { } Assert.AreEqual(1, il.Images.Count); // and this will fail What seems to happen here is this

I'm using ImageList for TreeView and ListView . I've first set the image quality to 32 bit and then added images which are semi-transparent. The quality looks OK, but after a couple of minutes coding, compiling and executing the application, the quality looks bad. See screenshot: Used properties ColorDepth: Depth32Bit ImageSize: 16; 16 TransparentColor: Transparent There are black pixels behind pixels which were semi-transparent but not fully transparent. Re-adding all images restores the original quality, but after a couple of minutes, it looks like on the right side of the screenshot.

I have some images that i added to imageList Cotrol manually. Now i need remove thart images from imageList depending on the key index and set as panel backgroud. How should i do it Images that you added in Image list are added to the ImageList.ImageCollection , so it is collection type then you can use most of the collection methods. Use the Images property to add, remove and access the image to display in background of panel. Add(key,image) Remove() RemoveAt() RemoveByKey() Check the example on the ImageList Class documentation to understand that how pragmatically use all of these methods.