Cara Membuat Gambar Thumbnail di Website ASP.NET

Gambar adalah salah satu konten yang cukup menarik pengunjung ke website anda. Tentunya diperlukan gambar-gambar berkualitas serta sesuai dengan ukuran yang pas ketika masuk kedalam website. Anda dapat mengubah ukuran gambar ini dengan tidak berpengaruh pada kualitas gambar dan Anda dapat menyimpannya dalam format apapun seperti .jpeg, .png, .bmp dan .gif dll Anda dapat menggunakan kode ini setiap tempat di asp.net. Berikut kami berikan contoh code membuat gambar Thumbnail di ASP.NET

<span style="font-weight: bold;color: #008800">public</span> System.Drawing.Image GenerateThumnail(System.Drawing.Image imgPhoto, <span style="font-weight: bold;color: #333399">int</span> Width, <span style="font-weight: bold;color: #333399">int</span> Height)
    {
        <span style="font-weight: bold;color: #333399">int</span> sourceWidth = <span style="font-weight: bold;color: #333399">int</span>.Parse(imgPhoto.Width.ToString());
        <span style="font-weight: bold;color: #333399">int</span> sourceHeight = <span style="font-weight: bold;color: #333399">int</span>.Parse(imgPhoto.Height.ToString());
        <span style="font-weight: bold;color: #333399">int</span> sourceX = <span style="font-weight: bold;color: #6600ee">0</span>;
        <span style="font-weight: bold;color: #333399">int</span> sourceY = <span style="font-weight: bold;color: #6600ee">0</span>;
        <span style="font-weight: bold;color: #333399">int</span> destX = <span style="font-weight: bold;color: #6600ee">0</span>;
        <span style="font-weight: bold;color: #333399">int</span> destY = <span style="font-weight: bold;color: #6600ee">0</span>;
 
        <span style="font-weight: bold;color: #333399">float</span> nPercent = <span style="font-weight: bold;color: #6600ee">0</span>;
        <span style="font-weight: bold;color: #333399">float</span> nPercentW = <span style="font-weight: bold;color: #6600ee">0</span>;
        <span style="font-weight: bold;color: #333399">float</span> nPercentH = <span style="font-weight: bold;color: #6600ee">0</span>;
 
        nPercentW = ((<span style="font-weight: bold;color: #333399">float</span>)Width / (<span style="font-weight: bold;color: #333399">float</span>)sourceWidth);
        nPercentH = ((<span style="font-weight: bold;color: #333399">float</span>)Height / (<span style="font-weight: bold;color: #333399">float</span>)sourceHeight);
        <span style="font-weight: bold;color: #008800">if</span> (nPercentH &lt; nPercentW)
        {
            nPercent = nPercentH;
            destX = System.Convert.ToInt16((Width -
                          (sourceWidth * nPercent)) / <span style="font-weight: bold;color: #6600ee">2</span>);
        }
        <span style="font-weight: bold;color: #008800">else</span>
        {
            nPercent = nPercentW;
            destY = System.Convert.ToInt16((Height -
                          (sourceHeight * nPercent)) / <span style="font-weight: bold;color: #6600ee">2</span>);
        }
 
        <span style="font-weight: bold;color: #333399">int</span> destWidth = (<span style="font-weight: bold;color: #333399">int</span>)(sourceWidth * nPercent);
        <span style="font-weight: bold;color: #333399">int</span> destHeight = (<span style="font-weight: bold;color: #333399">int</span>)(sourceHeight * nPercent);
 
        Bitmap bmPhoto = <span style="font-weight: bold;color: #008800">new</span> Bitmap(Width, Height,
                          PixelFormat.Format24bppRgb);
        bmPhoto.SetResolution(imgPhoto.HorizontalResolution,
                         imgPhoto.VerticalResolution);
        bmPhoto.MakeTransparent();
 
        Graphics grPhoto = Graphics.FromImage(bmPhoto);
        grPhoto.Clear(Color.Transparent);
        grPhoto.InterpolationMode =
                InterpolationMode.HighQualityBicubic;
 
        grPhoto.DrawImage(imgPhoto,
            <span style="font-weight: bold;color: #008800">new</span> <span style="font-weight: bold;color: #0066bb">Rectangle</span>(destX, destY, destWidth, destHeight),
            <span style="font-weight: bold;color: #008800">new</span> <span style="font-weight: bold;color: #0066bb">Rectangle</span>(sourceX, sourceY, sourceWidth, sourceHeight),
            GraphicsUnit.Pixel);
 
        grPhoto.Dispose();
        <span style="font-weight: bold;color: #008800">return</span> bmPhoto;
    }

public System.Drawing.Image GenerateThumnail(System.Drawing.Image imgPhoto, int Width, int Height)

{

int sourceWidth = int.Parse(imgPhoto.Width.ToString());

int sourceHeight = int.Parse(imgPhoto.Height.ToString());

int sourceX = 0;

int sourceY = 0;

int destX = 0;

int destY = 0;

float nPercent = 0;

float nPercentW = 0;

float nPercentH = 0;

nPercentW = ((float)Width / (float)sourceWidth);

nPercentH = ((float)Height / (float)sourceHeight);

if (nPercentH < nPercentW)

{

nPercent = nPercentH;

destX = System.Convert.ToInt16((Width -

(sourceWidth * nPercent)) / 2);

}

else

{

nPercent = nPercentW;

destY = System.Convert.ToInt16((Height -

(sourceHeight * nPercent)) / 2);

}

int destWidth = (int)(sourceWidth * nPercent);

int destHeight = (int)(sourceHeight * nPercent);

Bitmap bmPhoto = new Bitmap(Width, Height,

PixelFormat.Format24bppRgb);

bmPhoto.SetResolution(imgPhoto.HorizontalResolution,

imgPhoto.VerticalResolution);

bmPhoto.MakeTransparent();

Graphics grPhoto = Graphics.FromImage(bmPhoto);

grPhoto.Clear(Color.Transparent);

grPhoto.InterpolationMode =

InterpolationMode.HighQualityBicubic;

grPhoto.DrawImage(imgPhoto,

new Rectangle(destX, destY, destWidth, destHeight),

new Rectangle(sourceX, sourceY, sourceWidth, sourceHeight),

GraphicsUnit.Pixel);

grPhoto.Dispose();

return bmPhoto;

}

Gambar Thumbnail digunakan untuk gallery atau foto produk di website anda. Jika anda memerlukan silahkan copy-paste dan bagikan ke tyang lain.

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