How to change the image size from original size in carousel Item?
WinForms Carousel control displays the image in its original size by default. But we can customize the selected item image size in Carousel by changing the Bitmap image size. The following code demonstrates the same.
C#
//Initialize the data table
DataTable dt = new DataTable();
dt.Columns.Add("col1", typeof(byte[]));
//Set Image
Image img = Image.FromFile(@"../../Images/10812.jpg");
Image img1 = Image.FromFile(@"../../Images/Bird.jpg");
Image img2 = Image.FromFile(@"../../Images/10811.jpg");
Image img3 = Image.FromFile(@"../../Images/Bird.jpg");
DataRow dr = dt.NewRow();
DataRow dr1 = dt.NewRow();
DataRow dr2 = dt.NewRow();
DataRow dr3 = dt.NewRow();
//Add image to data table
dr["col1"] = imageToByteArray(img);
dr1["col1"] = imageToByteArray(img1);
dr2["col1"] = imageToByteArray(img2);
dr3["col1"] = imageToByteArray(img3);
dt.Rows.Add(dr);
dt.Rows.Add(dr1);
dt.Rows.Add(dr2);
dt.Rows.Add(dr3);
//Image into carousel
SetImagesForCarousel();
public byte[] imageToByteArray(System.Drawing.Image imageIn)
{
MemoryStream ms = new MemoryStream();
imageIn.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
return ms.ToArray();
}
‘To Add Carousel dynamically
object value = null;
private void SetImagesForCarousel()
{
foreach (DataRow drow in dt.Rows)
{
value = drow["col1"];
if (value.ToString().Length > 0)
{
byte[] imagenbuffer = (byte[])value;
MemoryStream ms = new MemoryStream(imagenbuffer);
CarouselImage carouselImage = new CarouselImage();
carouselImage.ItemImage = Image.FromStream(ms);
//To change the dimension of the image.
carouselImage.ItemImage = resizeImage(carouselImage.ItemImage, new Size(800, 600));
carousel1.ImageListCollection.Add(carouselImage);
}
}
this.carousel1.ImageSlides = true;
this.carousel1.RotateAlways = false;
this.carousel1.TransitionSpeed = 1f;
this.carousel1.ShowImagePreview = true;
carousel1.UseOriginalImageinPreview = true;
}
public static Image resizeImage(Image imgToResize, Size size)
{
return (Image)(new Bitmap(imgToResize, size));
}
VB
'Initialize the data table
Private dt As New DataTable()
dt.Columns.Add("col1", GetType(Byte()))
'Set Image
Dim img As Image = Image.FromFile("../../Images/10812.jpg")
Dim img1 As Image = Image.FromFile("../../Images/Bird.jpg")
Dim img2 As Image = Image.FromFile("../../Images/10811.jpg")
Dim img3 As Image = Image.FromFile("../../Images/Bird.jpg")
Dim dr As DataRow = dt.NewRow()
Dim dr1 As DataRow = dt.NewRow()
Dim dr2 As DataRow = dt.NewRow()
Dim dr3 As DataRow = dt.NewRow()
'Add image to data table
dr("col1") = imageToByteArray(img)
dr1("col1") = imageToByteArray(img1)
dr2("col1") = imageToByteArray(img2)
dr3("col1") = imageToByteArray(img3)
dt.Rows.Add(dr)
dt.Rows.Add(dr1)
dt.Rows.Add(dr2)
dt.Rows.Add(dr3)
'Image into carousel
SetImagesForCarousel()
Public Function imageToByteArray(ByVal imageIn As System.Drawing.Image) As Byte()
Dim ms As New MemoryStream()
imageIn.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg)
Return ms.ToArray()
End Function
''' <summary> ''' To Add Carousel dynamically ''' </summary>
Private value As Object = Nothing
Private Sub SetImagesForCarousel()
For Each drow As DataRow In dt.Rows
value = drow("col1")
If value.ToString().Length > 0 Then
Dim imagenbuffer() As Byte = DirectCast(value, Byte())
Dim ms As New MemoryStream(imagenbuffer)
Dim carouselImage As New CarouselImage()
carouselImage.ItemImage = Image.FromStream(ms)
'To change size of the image.
carouselImage.ItemImage = resizeImage(carouselImage.ItemImage, New Size(1500, 600))
carousel1.ImageListCollection.Add(carouselImage)
End If
Next drow
Me.carousel1.ImageSlides = True
Me.carousel1.RotateAlways = False
Me.carousel1.TransitionSpeed = 1F
Me.carousel1.ShowImagePreview = True
carousel1.UseOriginalImageinPreview = True
End Sub
Public Shared Function resizeImage(ByVal imgToResize As Image, ByVal size As Size) As Image
Return CType(New Bitmap(imgToResize, size), Image)
End Function |
Screenshot
Figure 1: By default, selected Carousel Item Image displayed in its original size.
Figure 2: Selected Carousel Item Image size has been changed/resized.
Samples:
C#: CarouselSample
VB: CarouselSample
Conclusion
I hope you enjoyed learning about how to change the image size from original size in carousel Item.
You can refer to our WinForms Carousel feature tour page to know about its other groundbreaking feature representations. You can also explore our WinForms Carousel documentation to understand how to create and manipulate data.
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