Windows Forms: How to Upload/Display Image In Picture Box Using C#

Dragging PictureBox, TextBox, Button control from your Visual Studio toolbox into your form designer. You can modify your layout as shown below.

How to show image in picturebox in c# using openfiledialog

Adding a click event handler to the Upload button allows you to select an image file, then display the image in your PictureBox control.

How to display image in picturebox in c#

private void btnUpload_Click(object sender, EventArgs e)
{
    //c# open file dialog with image filters
    using (OpenFileDialog ofd = new OpenFileDialog() { Filter = "Image Files(*.jpg; *.jpeg; *.gif; *.bmp; *.png)|*.jpg; *.jpeg; *.gif; *.bmp; *.png" })
    {
        if (ofd.ShowDialog() == DialogResult.OK)
        {
            //c# display image in picture box  
            pictureBox1.Image = new Bitmap(ofd.FileName);
            //c# image file path  
            txtFileName.Text = ofd.FileName;
        }
    }
}

Using OpenFileDialog class with the Filter property allows the user to select only valid image files, then display image in picturebox in c# using path.