asp.net上传图片并作处理水印与缩略图的实例代码(3)

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>asp.net 上传图片并作处理 水印 缩略图</title>
</head>
<body>
    <form runat="server">
   <div>
        <asp:FileUpload runat="server" BorderColor="Gray" BorderWidth="1px" />
        <asp:Button runat="server" Text="上传" BorderColor="Gray" BorderWidth="1px" /><br />
        <asp:Label runat="server"></asp:Label>
   </div>
    </form>
</body>
</html>
 


Default.aspx.cs代码:
 

复制代码 代码如下:


using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.IO;

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

}
    protected void Button1_Click(object sender, EventArgs e)
    {
        if (FileUpload1.HasFile)
        {
            string fileContentType = FileUpload1.PostedFile.ContentType;
            if (fileContentType == "image/bmp" || fileContentType == "image/gif" || fileContentType == "image/pjpeg")
            {
                string name = FileUpload1.PostedFile.FileName; // 客户端文件路径

FileInfo file = new FileInfo(name);
                string fileName = file.Name; // 文件名称
                string fileName_s = "s_" + file.Name; // 缩略图文件名称
                string fileName_sy = "sy_" + file.Name; // 水印图文件名称(文字)
                string fileName_syp = "syp_" + file.Name; // 水印图文件名称(图片)
                //以下路径可以根据情况进行修改
                string webFilePath = Server.MapPath("file/" + fileName); // 服务器端文件路径
                string webFilePath_s = Server.MapPath("file/" + fileName_s);  // 服务器端缩略图路径
                string webFilePath_sy = Server.MapPath("file/" + fileName_sy); // 服务器端带水印图路径(文字)
                string webFilePath_syp = Server.MapPath("file/" + fileName_syp); // 服务器端带水印图路径(图片)
                //以下为水印图片的路径一定要先准备一张水印图片!
                string webFilePath_sypf = Server.MapPath("file/shuiyin.jpg"); // 服务器端水印图路径(图片)

if (!File.Exists(webFilePath))
                {
                    try
                    {
                        FileUpload1.SaveAs(webFilePath); // 使用 SaveAs 方法保存文件
                        upFileClass.AddShuiYinWord(webFilePath, webFilePath_sy);
                        upFileClass.AddShuiYinPic(webFilePath, webFilePath_syp, webFilePath_sypf);
                        upFileClass.MakeThumbnail(webFilePath, webFilePath_s, 130, 130, "Cut"); // 生成缩略图方法
                        Label1.Text = "提示:文件“" + fileName + "”成功上传,并生成“" + fileName_s + "”缩略图,文件类型为:" + FileUpload1.PostedFile.ContentType + ",文件大小为:" + FileUpload1.PostedFile.ContentLength + "B";
                    }
                    catch (Exception ex)
                    {
                        Label1.Text = "提示:文件上传失败,失败原因:" + ex.Message;
                    }
                }
                else
                {
                    Label1.Text = "提示:文件已经存在,请重命名后上传";
                }
            }
            else
            {
                Label1.Text = "提示:文件类型不符";
            }

}
    }

}

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