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  • 图片及生成缩略图

    把图片上传到服务器,并生成一个缩略图

    UpImage.aspx

    <%@ Page language="c#" Codebehind="UpImage.aspx.cs" AutoEventWireup="false" Inherits="Sand.WebForm4" %>
    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
    <HTML>
        
    <HEAD>
            
    <title>WebForm4</title>
            
    <meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1">
            
    <meta name="CODE_LANGUAGE" Content="C#">
            
    <meta name="vs_defaultClientScript" content="JavaScript">
            
    <meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
        
    </HEAD>
        
    <body MS_POSITIONING="GridLayout">
            
    <form id="Form1" method="post" runat="server">
                
    <FONT face="宋体"><INPUT id="UpFile" style="Z-INDEX: 101; LEFT: 256px; POSITION: absolute; TOP: 152px" type="file"
                        runat
    ="server"><INPUT id="Submit_File" style="Z-INDEX: 102; LEFT: 504px; POSITION: absolute; TOP: 152px"
                        type
    ="button" value="上传" name="Button1" runat="server"></FONT>
            
    </form>
        
    </body>
    </HTML>

    UpImage.aspx.cs

            private void Button1_ServerClick(object sender, System.EventArgs e)
            
    {
                
    string UpFileName    =    UpFile.PostedFile.FileName.Substring(UpFile.PostedFile.FileName.LastIndexOf("\\"),UpFile.PostedFile.FileName.Length - UpFile.PostedFile.FileName.LastIndexOf("\\"));
                UpFile.PostedFile.SaveAs(Server.MapPath(
    "Images\\" + UpFileName));

                System.Drawing.Image ObjDrImage    
    =    System.Drawing.Image.FromFile(Server.MapPath("Images\\" + UpFileName));
                System.Drawing.Bitmap BMP    
    =    new System.Drawing.Bitmap(60,80,System.Drawing.Imaging.PixelFormat.Format16bppRgb555);
                System.Drawing.Graphics G    
    =    System.Drawing.Graphics.FromImage(BMP);
                G.Clear(Color.Transparent);
                G.DrawImage(ObjDrImage,
    new System.Drawing.Rectangle(new System.Drawing.Point(0,0),new System.Drawing.Size(60,80)),0,0,ObjDrImage.Width,ObjDrImage.Height,System.Drawing.GraphicsUnit.Pixel);
                BMP.Save(Server.MapPath(
    "ImagesSL\\SL.jpg"),System.Drawing.Imaging.ImageFormat.Jpeg);
                G.Dispose();
                G    
    =    null;
                BMP.Dispose();
                BMP    
    =    null;
                ObjDrImage.Dispose();
                ObjDrImage    
    =    null;
            }

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  • 原文地址:https://www.cnblogs.com/Sandheart/p/94782.html
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