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【IT】【ASP.NET】图片上传控件使用 (19/695)

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修改回帖引用楼主：ソ死人

昨天晚上

写了一个关于图片上传空间的小demo

源码与说明看下：

控件名称：FileUpload

随即拖放：1个Button 、1个Label 以及供新上传图片显示预览的Image控件

关键代码如下：

    protected void Button1_Click(object sender, EventArgs e)
    {
        //图片名称
        string name = FileUpload1.FileName;
        //图片大小
        string size = FileUpload1.PostedFile.ContentLength.ToString();
        //图片类型
        string type = FileUpload1.PostedFile.ContentType;
        //图片本地途径
        string path = Server.MapPath("upfile\\") + name;
        //图片类型截取.以后的字符串
        string tp = name.Substring(name.LastIndexOf("."));
        //网络虚拟路径
        string wpath = "upfile\\" + name;

        //截取用于判断是否为Image
        string aa = type.Substring(0, 5);

if (aa == "image")
 {
 //详细的显示图片信息
 FileUpload1.SaveAs(path);
 Label1.Text = name + " " + size + " " + type + " " + path + " " + tp + " " + wpath + " " + aa;

 //图片通过网络路径显示到Image控件中
 Image1.ImageUrl = wpath;
 }
 else
 {
 Response.Write("<script>alret('文件格式有误，请上传图片格式文件！')</sctipt>");
 }
 }

回帖引用 1楼賴┺尐

yan yun le...

回帖引用 2楼培培

用了FileUpload怎么还放button和lable?
不需要了..FileUpload就是一上传文件的控件.

//存图到虚拟文件夹  OK!
string FullFileName = this.FileUpload1.FileName;
                string FileName = FullFileName.Substring(FullFileName.LastIndexOf('\\') + 1);
                if (FileName.Trim().Length != 0)
                {
                    this.FileUpload1.SaveAs(Server.MapPath("../files/") + "\\" + username + FileName);
                    //虚拟目录
                    string path = "../files/" + FileName;
                    //已经判断了
}
else
{
  //另当别论
}

回帖引用 3楼[楼主] ソ死人

我那是显示图片信息和读取！

回帖引用 4楼培培

了解..C#里的显示和读取是吧.
string path = "";
        private void button1_Click(object sender, EventArgs e)
        {
            OpenFileDialog op = new OpenFileDialog();
            if (op.ShowDialog() == DialogResult.OK)
            {
                this.txturl.Text = op.FileName;
                path = op.FileName;
                string filename = path.Substring(path.LastIndexOf("\\") + 1);
                string alias = filename.Substring(filename.LastIndexOf(".") + 1);
                if (alias == "jpg" || alias == "bmp" || alias == "gif" || alias == "JPG" || alias == "BMP" || alias == "GIF")
                {
                    GetInfo(path);
                    MemoryStream ms = new MemoryStream(bt);
                    try
                    {
                        this.picpro.Image = Image.FromStream(ms);
                        this.picpro.SizeMode = PictureBoxSizeMode.StretchImage;
                    }
                    catch (Exception ex)
                    {
                        MessageBox.Show("上传图片为非法格式！" + ex.Message);
                        this.txturl.Text = "";
                    }
                }
                else
                {
                    MessageBox.Show("上传图片为非法格式！");
                    this.txturl.Text = "";
                }

            }
        }
        private void GetInfo(string path)
        {
            FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read);
            bt = new byte[fs.Length];
            BinaryReader br = new BinaryReader(fs);
            br.Read(bt, 0, bt.Length);
            br.Close();
            fs.Close();
        }

回帖引用 5楼[楼主] ソ死人