主旨:
上傳圖片後縮圖並存入資料庫或直接輸出
利用Stream操作圖形
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- using System.IO;
- using System.Drawing;
- protected void UploadBtn_Click(object sender, EventArgs e)
- {
- System.Drawing.Image img = System.Drawing.Image.FromStream(FileUpload1.PostedFile.InputStream);//取得上傳圖形stream
- img = img.GetThumbnailImage(400, 300,null,System.IntPtr.Zero);//利用GDI+自動縮圖
- MemoryStream stream = new MemoryStream();
- img.Save(stream, System.Drawing.Imaging.ImageFormat.Jpeg);//將縮圖存入MemoryStream
- //將MemoryStream,轉成byte[],存入資料庫
- Data.SqlClient.SqlParameter("pic", stream.GetBuffer());
- //直接網頁顯示
- Response.Clear();
- Response.ContentType = "image/jpeg";
- //方法一
- img.Save(Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg);
- //方法二
- Response.BinaryWrite(stream.GetBuffer());
- }
參考:http://longer.slps.tpc.edu.tw/FNG/Forum/ViewTopic.aspx?sid=77&fumcode=ad_aspnet&page=1
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