《WebForm开发系列之控件篇》Item1 FileUpload

1.上传类：UpLoad.cs

 

/// <summary>
    /// 文件上传
    /// </summary>
    public class Upload
    {
        public Upload() { }

        /// <summary>
        /// 文件上传 按照当前时间自动命名!
        /// </summary>
        /// <param name="fu">传入上传控件的名称</param>
        /// <param name="address">传入文件保存的虚拟路径</param>
        /// <returns></returns>
        public static UpModel UpFile(FileUpload fu, string address)
        {
            string Name = fu.FileName;
            string TimeName = DateTime.Now.ToString("yyyyMMddhhmmss");
            string fe = Name.Substring(Name.LastIndexOf(".") + 1);
            string SevaSoft = System.Web.HttpContext.Current.Server.MapPath(address);
            System.IO.Directory.CreateDirectory(SevaSoft);
            string Soft = SevaSoft + TimeName + "." + fe;
            fu.SaveAs(Soft);
            UpModel File = new UpModel();
            File.address = TimeName + "." + fe;
            File.size = (fu.PostedFile.ContentLength / 1024).ToString();

            return File;
        }
    }

    /// <summary>
    /// 文件上传数据实体
    /// </summary>
    public class UpModel
    {
        public UpModel() { }

        private string _address;
        private string _size;

        /// <summary>
        /// 文件路径
        /// </summary>
        public string address
        {
            get { return _address; }
            set { _address = value; }
        }

        /// <summary>
        /// 文件大小
        /// </summary>
        public string size
        {
            get { return _size; }
            set { _size = value; }
        }
    }

 

2.窗体设计器：

 

 <tr>
            <td class="p_a_t">
                显 示 图 片：
            </td>
            <td align="left">
                <asp:FileUpload ID="FileUpload1" runat="server" />
<asp:Button ID="Button2" runat="server" Text="文档上传" OnClick="UpFile_Click"/> <font color="red">请上传要提供显示的图片</font>
            </td>
<tr class="p_a_t">
<td >图 片 路 径：</td>
<td  align="left">&nbsp;<asp:Label ID="Label1" runat="server"  />
</td>
</tr>        </tr>

 

3.代码设计器

 

protected void UpFile_Click(object sender, EventArgs e)
        {
            if (FileUpload1.HasFile)
            {
                UpModel File = Upload.UpFile(FileUpload1, "UploadImg\\Picture\\");
                Label1.Text = File.address.ToString();
                //Label2.Text = File.size.ToString() + " Kb ";
            }
            else Response.Write("<script>alert('请选择要显示的图片!');history.go(-1);</script>");
        }

 

 4.允许上传文件的扩展名

 

///<summary>
        ///是否允许该扩展名上传
        ///</summary>
        ///<paramname = "HtmlFile">HtmlInputFile控件</param>
        ///<returns>允许则返回true,否则返回false</returns>
        public bool IsAllowExtension(HtmlInputFile HtmlFile)
        {
            string StrExtension = null;
            string StrOldFilePath = null;
            string[] ArrExtension = { ".gif", ".jpg", ".jpeg", ".bmp", ".png" };

            if (HtmlFile.PostedFile.FileName != string.Empty)
            {
                StrOldFilePath = HtmlFile.PostedFile.FileName;     //取得上传文件的扩展名
                StrExtension = StrOldFilePath.Substring(StrOldFilePath.LastIndexOf("."));
                
                //判断该扩展名是否合法
                for (int i = 0; i < ArrExtension.Length; i++)
                {
                    if (StrExtension.Equals(ArrExtension[i])) return true;
                }
            }
            return false;
        }

 

 

 

作者：Sue

出处：http://www.cnblogs.com/Sue_
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