This article describes how to rotate an image, This is the next article of the Image Editing Tool in VB.Net article series.
Part1: Open an image Part2: Resizing image Part3: Cropping image Part 4: brightness of image This article is the next part of how to make an image editor in VB.Net. In this article we will discuss how to rotate and flip an image and save it. Form Designer: Put four buttons on the form like this: Code: We are using here the RotateFlip() method for rotaing images. The RotateFlip method accepts the RotateFlipType enumeration that has these members (Ref: MDSN): Rotate90FlipNone Specifies a 90-degree clockwise rotation without flipping. Rotate180FlipNone Specifies a 180-degree clockwise rotation without flipping. Rotate270FlipNone Specifies a 270-degree clockwise rotation without flipping. RotateNoneFlipX Specifies no clockwise rotation followed by a horizontal flip. Rotate90FlipX Specifies a 90-degree clockwise rotation followed by a horizontal flip. Rotate180FlipX Specifies a 180-degree clockwise rotation followed by a horizontal flip. Rotate270FlipX Specifies a 270-degree clockwise rotation followed by a horizontal flip. RotateNoneFlipY Specifies no clockwise rotation followed by a vertical flip. Rotate90FlipY Specifies a 90-degree clockwise rotation followed by a vertical flip. Rotate180FlipY Specifies a 180-degree clockwise rotation followed by a vertical flip. Rotate270FlipY Specifies a 270-degree clockwise rotation followed by a vertical flip. RotateNoneFlipXY Specifies no clockwise rotation followed by a horizontal and vertical flip. Rotate90FlipXY Specifies a 90-degree clockwise rotation followed by a horizontal and vertical flip. Rotate180FlipXY Specifies a 180-degree clockwise rotation followed by a horizontal and vertical flip. Rotate270FlipXY Specifies a 270-degree clockwise rotation followed by a horizontal and vertical flip. Generate click event of all four button, and try to apply these code snippt Private Sub btnRotateLeft_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnRotateLeft.Click PictureBox1.Image.RotateFlip(RotateFlipType.Rotate90FlipNone) PictureBox1.Refresh() End Sub Private Sub btnRotateRight_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnRotateRight.Click PictureBox1.Image.RotateFlip(RotateFlipType.Rotate270FlipNone) PictureBox1.Refresh() End Sub Private Sub btnRotateHorizantal_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnRotateHorizantal.Click PictureBox1.Image.RotateFlip(RotateFlipType.RotateNoneFlipX) PictureBox1.Refresh() End Sub Private Sub btnRotatevertical_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnRotatevertical.Click PictureBox1.Image.RotateFlip(RotateFlipType.RotateNoneFlipY) PictureBox1.Refresh() End Sub If you click on the "horizantal Rotate" button then the result will be like this:You can download the source code for description.One more thing is that the RotateFlip method rotates the image clockwise.
Part1: Open an image
Part2: Resizing image
Part3: Cropping image
Part 4: brightness of image
This article is the next part of how to make an image editor in VB.Net. In this article we will discuss how to rotate and flip an image and save it.
Form Designer:
Put four buttons on the form like this:
Code:
We are using here the RotateFlip() method for rotaing images. The RotateFlip method accepts the RotateFlipType enumeration that has these members (Ref: MDSN):
Rotate90FlipNone
Specifies a 90-degree clockwise rotation without flipping.
Rotate180FlipNone
Specifies a 180-degree clockwise rotation without flipping.
Rotate270FlipNone
Specifies a 270-degree clockwise rotation without flipping.
RotateNoneFlipX
Specifies no clockwise rotation followed by a horizontal flip.
Rotate90FlipX
Specifies a 90-degree clockwise rotation followed by a horizontal flip.
Rotate180FlipX
Specifies a 180-degree clockwise rotation followed by a horizontal flip.
Rotate270FlipX
Specifies a 270-degree clockwise rotation followed by a horizontal flip.
RotateNoneFlipY
Specifies no clockwise rotation followed by a vertical flip.
Rotate90FlipY
Specifies a 90-degree clockwise rotation followed by a vertical flip.
Rotate180FlipY
Specifies a 180-degree clockwise rotation followed by a vertical flip.
Rotate270FlipY
Specifies a 270-degree clockwise rotation followed by a vertical flip.
RotateNoneFlipXY
Specifies no clockwise rotation followed by a horizontal and vertical flip.
Rotate90FlipXY
Specifies a 90-degree clockwise rotation followed by a horizontal and vertical flip.
Rotate180FlipXY
Specifies a 180-degree clockwise rotation followed by a horizontal and vertical flip.
Rotate270FlipXY
Specifies a 270-degree clockwise rotation followed by a horizontal and vertical flip.
Generate click event of all four button, and try to apply these code snippt
Private Sub btnRotateLeft_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnRotateLeft.Click
PictureBox1.Image.RotateFlip(RotateFlipType.Rotate90FlipNone)
PictureBox1.Refresh()
End Sub
Private Sub btnRotateRight_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnRotateRight.Click
PictureBox1.Image.RotateFlip(RotateFlipType.Rotate270FlipNone)
Private Sub btnRotateHorizantal_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnRotateHorizantal.Click
PictureBox1.Image.RotateFlip(RotateFlipType.RotateNoneFlipX)
Private Sub btnRotatevertical_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnRotatevertical.Click
PictureBox1.Image.RotateFlip(RotateFlipType.RotateNoneFlipY)
End Sub If you click on the "horizantal Rotate" button then the result will be like this:You can download the source code for description.One more thing is that the RotateFlip method rotates the image clockwise.
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