How do I generate thumbnail in ASP.NET script? 我如何使用ASP.NET程式製作縮圖?

06 Sep 2010

Support Center » Knowledgebase » How do I generate thumbnail in ASP.NET script? 我如何使用ASP.NET程式製作縮圖?

	How do I generate thumbnail in ASP.NET script? 我如何使用ASP.NET程式製作縮圖?

Solution You could generate thumbnail for your image in ASP.NET script, below is the sample code:
你可以在ASP.NET script中為你的圖片製作縮圖, 以下是參考程式碼:

<%@ Import Namespace="System.Collections" %>
<%@ Import Namespace="System.Drawing" %>
<%@ Import Namespace="System.Drawing.Imaging" %>
<%@ Import Namespace="System.Drawing.Drawing2D" %>
<%@ Import Namespace="System.IO" %>
<%@ Import Namespace="System.Text" %>

<script Language="C#" runat="server">

    protected Size ThumbNailSize = new Size(40,20);

    private void Page_Load(object sender, System.EventArgs e)
    {
        string sPhysicalPath = Server.MapPath(".");
        string sFileName = "test.jpg";
        string sThumbName = "thumb_test.jpg";

        this.GenerateThumbNail(sPhysicalPath,sFileName,sThumbName,ImageFormat.Jpeg);
    }

    public void GenerateThumbNail(string sPhysicalPath,string sOrgFileName, string sThumbNailFileName,ImageFormat oFormat)
    {
        try
        {
            System.Drawing.Image oImg = System.Drawing.Image.FromFile(sPhysicalPath + @"\" + sOrgFileName);
            System.Drawing.Image oThumbNail = new Bitmap(this.ThumbNailSize.Width, this.ThumbNailSize.Height, oImg.PixelFormat);
            Graphics oGraphic = Graphics.FromImage(oThumbNail);
            oGraphic.CompositingQuality = CompositingQuality.HighQuality ;
            oGraphic.SmoothingMode = SmoothingMode.HighQuality ;
            oGraphic.InterpolationMode = InterpolationMode.HighQualityBicubic ;
            Rectangle oRectangle = new Rectangle(0, 0, this.ThumbNailSize.Width, this.ThumbNailSize.Height);
            oGraphic.DrawImage(oImg, oRectangle);
            oThumbNail.Save(sPhysicalPath + @"\" + sThumbNailFileName,oFormat);
            oImg.Dispose();
        }
        catch (Exception) { }
    }
</script>

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Created On:

03 Feb 2010 11:24 PM