asp.net 上传附件

protected void btnUPLoadFile_Click(object sender, EventArgs e)
    {
        HttpPostedFile file = this.fuAttachFile.PostedFile;
        int fileLength = file.ContentLength;
        string fileType = file.ContentType;
        if (fileLength == 0)
        {
            WebClass.Define.MessageBox(Page, "请选择要上传的文件");
            return;
        }
        else
        {
            byte[] fileByte = new byte[fileLength];//用文件的长度来初始化一个字节数组存储临时的文件
            Stream fileStream = file.InputStream;//
            string filePath = file.FileName;
            char[] aa = new char[1] { '\\' };
            string[] bb = filePath.Split(aa);
            string filename = bb[bb.Length - 1];
            fileStream.Read(fileByte, 0, fileLength);
            //上传;
            if (myErrands.Customer_Atta_Add(labID.Text, filename, fileByte) > 0)
            {
                WebClass.Define.MessageBox(Page, "上传附件失败");
                return;
            }
            //设置数据源，进行数据绑定
            this.gvAttachName.DataSource = myErrands.DataSet_Customer_Atta(labID.Text);
            this.gvAttachName.DataBind();
        }
    } 

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