求一个asp.net上传图片的例子？

Question

上传图片后 显示上传成功后 可以加入数据库（sqlserver） 
并且可以在img控件上显示上传的图片（显示控件和上传控件 在一个页面上）

Answer 1

        string imagePath = "";
        if (FileUploadImage.HasFile)
        {
            string FileAndExtName = FileUploadImage.FileName;   //获取文件名 
            string ExtName = " ";
            string FileName = " ";
            string ContentType = FileUploadImage.PostedFile.ContentType;   //获取文件类型 
            string filepath = Server.MapPath("~/Upfile") + "\\";
            int i = FileAndExtName.LastIndexOf(".");   //取得文件扩展名
            string newext = FileAndExtName.Substring(i);
            //上传图片
            DateTime now = DateTime.Now;
            string newname = DateTime.Now.Year.ToString() + DateTime.Now.Month.ToString() + DateTime.Now.Day.ToString() + DateTime.Now.Hour.ToString() + DateTime.Now.Minute.ToString() + DateTime.Now.Second.ToString();
            if (CheckFileType(newext))
            {
                if (!Directory.Exists(filepath))
                {
                    Directory.CreateDirectory(filepath);
                    if (Path.HasExtension(FileAndExtName))
                    {
                        ExtName = Path.GetExtension(FileAndExtName);
                        FileName = FileAndExtName.Replace(ExtName, " ");
                    }
                    else
                    {
                        FileName = FileAndExtName;
                    }
                    FileUploadImage.SaveAs(filepath + newname + newext);
                }
                else
                {
                    if (Path.HasExtension(FileAndExtName))
                    {
                        ExtName = Path.GetExtension(FileAndExtName);
                        FileName = FileAndExtName.Replace(ExtName, " ");
                    }
                    else
                    {
                        FileName = FileAndExtName;
                    }
                    FileUploadImage.SaveAs(filepath + newname + newext);
                }
            }
            else
            {
                Response.Write("<script>alert('图片格式不正确！')</script>");
                return;
            }
            imagePath = "~/Upfile/" + newname + newext;
        }
        else
        {
            imagePath = "无";
        }
    bool CheckFileType(string ext)//判断上传图片扩展名
    {
        switch (ext.ToLower())
        {
            case ".gif":
            case ".png":
            case ".jpg":
            case ".jpeg":
            case ".bmp":
                return true;
            default:
                return false;
        }
    }
这是显示图片的代码：
 function GetImagePath()
 {
    var upload = document.getElementById("ctl00_ContentPlaceHolder1_FileUploadImage");
    var image = document.getElementById("ctl00_ContentPlaceHolder1_Image1");
    var uploadValue = upload.value.toString();
//debugger
    var i =uploadValue.lastIndexOf('.');
    var houZui = uploadValue.substring(i);
    if((houZui.toLowerCase()!=".jpg")&&(houZui.toLowerCase()!=".bmp"))
    {
        alert("您输入的图片格式不正确");return false;
    }
    image.src=upload.value;    
 }

Answer 2

if (CheckFileType(newext)) 
            { 
                if (!Directory.Exists(filepath)) 
                { 
                    Directory.CreateDirectory(filepath); 
                    if (Path.HasExtension(FileAndExtName)) 
                    { 
                        ExtName = Path.GetExtension(FileAndExtName); 
                        FileName = FileAndExtName.Replace(ExtName, " "); 
                    } 
                    else 
                    { 
                        FileName = FileAndExtName; 
                    } 
                    FileUploadImage.SaveAs(filepath + newname + newext); 
                } 
                else 
                { 
                    if (Path.HasExtension(FileAndExtName)) 
                    { 
                        ExtName = Path.GetExtension(FileAndExtName); 
                        FileName = FileAndExtName.Replace(ExtName, " "); 
                    } 
                    else 
                    { 
                        FileName = FileAndExtName; 
                    } 
                    FileUploadImage.SaveAs(filepath + newname + newext); 
                } 
            } 

Answer 3

哦，你是不是不知道哪个是上传控件？
FileUpLoad