使图像适合PictureBox

Question

using (SqlConnection myDatabaseConnection = new SqlConnection(myConnectionString.ConnectionString))
{
    myDatabaseConnection.Open();
    using (SqlCommand SqlCommand = new SqlCommand("Select Photo from Employee where EmpID LIKE '%' + @EmpID + '%' ", myDatabaseConnection))
    {
        SqlCommand.Parameters.AddWithValue("@EmpID", textBox1.Text);
        DataSet DS = new DataSet();
        SqlDataAdapter adapter = new SqlDataAdapter(SqlCommand);
        adapter.Fill(DS, "Images");

        var imagesTable = DS.Tables["Images"];
        var imagesRows = imagesTable.Rows;
        var count = imagesRows.Count;

        if (count <= 0)
            return;
        var imageColumnValue =
            imagesRows[count - 1]["Image"];
        if (imageColumnValue == DBNull.Value)
            return;

        var data = (Byte[])imageColumnValue;
        using (var stream = new MemoryStream(data))
        {
            pictureBox1.Image = Image.FromStream(stream);
        }

    }
}

如果图像太大而picturebox无法适应.什么是使图像适合的代码picturebox？我picturebox的平方,如果图像是矩形如何将其裁剪并显示在像PictureBox的这个,画面的下部将被删除.

Answer 1

首先,为了使任何图像"调整大小"以适应图片框,您可以设置 PictureBox.SizeMode = PictureBoxSizeMode.StretchImage

如果你想事先裁剪图像(即切掉边或顶部和底部),那么你需要清楚地定义你想要的行为(从顶部开始,填充pciturebox的高度并裁剪其余部分,或者从在底部,将图片框的高度填充到顶部等,并且使用图片框和图像的高度/宽度属性来剪裁图像并获得您正在寻找的效果应该相当简单.

Answer 2

使用以下代码行,您将找到解决方案......

pictureBox1.ImageLocation = @"C:\Users\Desktop\mypicture.jpg";
pictureBox1.SizeMode =PictureBoxSizeMode.StretchImage;

Answer 3

看看picturebox的sizemode属性.

pictureBox1.SizeMode =PictureBoxSizeMode.StretchImage;

Answer 4

伊玛目马赫迪aj

您可以使用属性部分

Answer 5

PictureBox.SizeMode 选项缺少“填充”或“覆盖”模式，这类似于缩放，但需要进行裁剪以确保填充图片框。在 CSS 中，它是“覆盖”选项。

此代码应该能够：

static public void fillPictureBox(PictureBox pbox, Bitmap bmp)
{
    pbox.SizeMode = PictureBoxSizeMode.Normal;
    bool source_is_wider = (float)bmp.Width / bmp.Height > (float)pbox.Width / pbox.Height;

    var resized = new Bitmap(pbox.Width, pbox.Height);
    var g = Graphics.FromImage(resized);        
    var dest_rect = new Rectangle(0, 0, pbox.Width, pbox.Height);
    Rectangle src_rect;

    if (source_is_wider)
    {
        float size_ratio = (float)pbox.Height / bmp.Height;
        int sample_width = (int)(pbox.Width / size_ratio);
        src_rect = new Rectangle((bmp.Width - sample_width) / 2, 0, sample_width, bmp.Height);
    }
    else
    {
        float size_ratio = (float)pbox.Width / bmp.Width;
        int sample_height = (int)(pbox.Height / size_ratio);
        src_rect = new Rectangle(0, (bmp.Height - sample_height) / 2, bmp.Width, sample_height);
    }

    g.DrawImage(bmp, dest_rect, src_rect, GraphicsUnit.Pixel);
    g.Dispose();

    pbox.Image = resized;
}

Answer 6

您可以将picturebox的SizeMode属性设置为PictureSizeMode.Zoom,这将增加较小图像的大小或减小较大图像的大小以填充PictureBox