求问大神门，怎么上传图片？后台代码怎么写？
前台写了个FileUpload和Button，后台怎么写？


[解决办法]
http://www.cnblogs.com/qiantuwuliang/archive/2009/08/21/1551200.html
[解决办法]

C# code

 protected void btnOK_Click(object sender, EventArgs e)    {        //上传列表图片        try        {            string datedir = DateTime.Now.ToString("yyyyMMdd");            string name = Maticsoft.Utility.Tool.Upload(myFileUpload, new string[] { ".jpg", ".png", ".gif" }, 3, Server.MapPath("../download/"));                    }        catch (Exception ex)        {            //错误        }    }
[解决办法]

傻了。竟然忘记贴函数了。SORRY
C# code
    public static string Upload(FileUpload myFileUpload, string[] allowExtensions, int maxLength, string savePath)        {            // 文件格式是否允许上传            bool fileAllow = false;            //检查是否有文件案            if (myFileUpload.HasFile)            {                // 检查文件大小, ContentLength获取的是字节，转成M的时候要除以2次1024                if (myFileUpload.PostedFile.ContentLength / 1024 / 1024 >= maxLength)                {                    throw new Exception("只能上传小于" + maxLength + "M的文件！");                }                //取得上传文件之扩展文件名，并转换成小写字母                string fileExtension = System.IO.Path.GetExtension(myFileUpload.FileName).ToLower();                string tmp = "";   // 存储允许上传的文件后缀名                //检查扩展文件名是否符合限定类型                for (int i = 0; i < allowExtensions.Length; i++)                {                    tmp += i == allowExtensions.Length - 1 ? allowExtensions[i] : allowExtensions[i] + ",";                    if (fileExtension == allowExtensions[i])                    {                        fileAllow = true;                    }                }                if (fileAllow)                {                    try                    {                        string datedir = DateTime.Now.ToString("yyyyMMdd");                        if (!Directory.Exists(savePath + datedir))                        {                            Directory.CreateDirectory(savePath + datedir);                        }                        string saveName = Guid.NewGuid() + fileExtension;                        string path = savePath + datedir + "/" + saveName;                        //存储文件到文件夹                        myFileUpload.SaveAs(path);                        return datedir + "/" + saveName;                    }                    catch (Exception ex)                    {                        throw new Exception(ex.Message);                    }                }                else                {                    throw new Exception("文件格式不符，可以上传的文件格式为：" + tmp);                }            }            else            {                throw new Exception("请选择要上传的文件！");            }        }
[解决办法]
 protected void UploadButton_Click(object sender, EventArgs e)  
   {  
       string uploadName = InputFile.Value;//获取待上传图片的完整路径，包括文件名  
       //string uploadName = InputFile.PostedFile.FileName;  
       string pictureName = "";//上传后的图片名，以当前时间为文件名，确保文件名没有重复  
       if (InputFile.Value != "")  
       {  
           int idx = uploadName.LastIndexOf(".");  
           string suffix = uploadName.Substring(idx);//获得上传的图片的后缀名  
           pictureName = DateTime.Now.Ticks.ToString() + suffix;  
       }  
       try  
       {  
           if (uploadName != "")   
 
           {  
               string path = Server.MapPath("~/images/");  
               InputFile.PostedFile.SaveAs(path + pictureName);  
           }  
       }  
       catch (Exception ex)  
       {  
           Response.Write(ex);  
       }  
   }
[解决办法]
 protected void UploadButton_Click(object sender, EventArgs e)  
   {  
       string uploadName = InputFile.Value;//获取待上传图片的完整路径，包括文件名  
       //string uploadName = InputFile.PostedFile.FileName;  
       string pictureName = "";//上传后的图片名，以当前时间为文件名，确保文件名没有重复  
       if (InputFile.Value != "")  
       {  
           int idx = uploadName.LastIndexOf(".");  
           string suffix = uploadName.Substring(idx);//获得上传的图片的后缀名  
           pictureName = DateTime.Now.Ticks.ToString() + suffix;  
       }  
       try  
       {  
           if (uploadName != "")  
           {  
               string path = Server.MapPath("~/images/");  
               InputFile.PostedFile.SaveAs(path + pictureName);  
           }  
       }  
       catch (Exception ex)  
       {  
           Response.Write(ex);  
       }  
   }
[解决办法]
探讨

傻了。竟然忘记贴函数了。SORRY
C# code

    public static string Upload(FileUpload myFileUpload, string[] allowExtensions, int maxLength, string savePath)
        {
            // 文件格式是否允许上传
            bool fil……