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C# - Changing SizeMode of picturebox

By : user2176012
Date : October 14 2020, 02:23 PM
may help you . Just load your file to Bitmap and then compare its Height and Width property with our custom size (500 x 301). like
code :
tbFileName.Text = open.FileName;

using (Bitmap bmp = new Bitmap(open.FileName))
    if (bmp.Height >= 301 && bmp.Width >= 500)
        pictureBox1.SizeMode = PictureBoxSizeMode.AutoSize;

    pictureBox1.Image = bmp;

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Changing the sizemode of a background image in picturebox

By : Deonta Landis
Date : March 29 2020, 07:55 AM
This might help you Look at BackgroundImageLayout.
code :
whatever.BackgroundImageLayout = ImageLayout.Stretch

Keeping the relative position of a picturebox on another picturebox while resizing with SizeMode.Zoom, Winforms

By : user2533376
Date : March 29 2020, 07:55 AM
help you fix your problem Since in Zoom mode the image size ratio is not changed, you can calculate the actual offset and size of image after piturebox is resized.
code :
double imgWidth = 0.0;
double imgHeight = 0.0;
double imgOffsetX = 0.0;
double imgOffsetY = 0.0;
double dRatio = pb.Image.Height / (double)pb.Image.Width; //dRatio will not change during resizing

pb.MouseClick += (ss, ee) =>
    test30x30.Location = new Point(ee.X - test30x30.Image.Width / 2, ee.Y - test30x30.Image.Height);
    //x = ...
    //y = ...

this.Resize += (ss, ee) =>
    pb.Size = new Size(this.ClientSize.Width - 100, this.ClientSize.Height - 100);  

pb.SizeChanged += (ss, ee) =>
    //recalculate image size and offset
    if (pb.Height / pb.Width > dRatio) //case 1 
        imgWidth = pb.Width;
        imgHeight = pb.Width * dRatio;

        imgOffsetX = 0.0;
        imgOffsetY = (pb.Height - imgHeight) / 2;
    else //case 2 
        imgHeight = pb.Height;
        imgWidth = pb.Height / dRatio;
        imgOffsetY = 0.0;
        imgOffsetX = (pb.Width - imgWidth) / 2;

    //test30x30.Location = ...

Auto change the SizeMode property from a PictureBox

By : Muhammad Imran
Date : March 29 2020, 07:55 AM
This might help you Can i make something without use of if/switch-case statements
One way is to fill the CBO with the Enum names:
code :
pb.SizeMode = CType([Enum].Parse(GetType(PictureBoxSizeMode), cbo.Text), 

picturebox SizeMode.AutoSize problem C#

By : Mr.Son
Date : March 29 2020, 07:55 AM
With these it helps I'm trying to allow the user to adjust the size mode property of a picturebox on a form using radio buttons. It works fine for all of the size modes, center, zoom, normal etc, but when the user selects autosize, it changes, but from there it doesn't allow the user to change back to any other size modes. More rather, it does, but it simply doesn't work. , See the MSDN

Pick color from a Picturebox with SizeMode ZOOM

By : Bobby Saw
Date : March 29 2020, 07:55 AM
it should still fix some issue How to get color of a point (location of mouse cursor) from a ZOOMed Picture box ? , You can try something like this:
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