upload.aspx.cs

基于Web的图片管理功能模块,使用SQL SERVER和VS2005

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class Upload : System.Web.UI.Page
{
    SQLHelper helper = new SQLHelper();

    // 画面装载
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            if (Request.Params["ImgID"] != null)
            {
                btnUpload.Enabled = true;
                ViewState["ImgID"] = Request.Params["ImgID"].ToString();
            }
            else
            {
                btnUpload.Enabled = false;
                ViewState["ImgID"] = "";
            }
        }
    }
    // 上传图片
    protected void btnUpload_Click(object sender, EventArgs e)
    {
        if (tbxPath.Value.ToString() == "")
        {
            Response.Write("<script>window.alert('请指定上传路径！')</script>");
        }
        else if (tbxPath.PostedFile.ContentLength == 0)
        {
            Response.Write("<script>window.alert('文件的内容不能为空！')</script>");
        }

        // 获取上传图片的文件名
        String fileName = tbxPath.PostedFile.FileName.Substring(tbxPath.PostedFile.FileName.LastIndexOf("\\"));

        if (System.IO.File.Exists(Server.MapPath(Request.ApplicationPath) + "\\Pictures" + fileName))
        {
            Response.Write("<script>window.alert('该文件名在服务器中已存在，请更改文件名！')</script>");
        }
        else
        {
            try
            {
                // 上传文件
                tbxPath.PostedFile.SaveAs(Server.MapPath(Request.ApplicationPath) + "\\Pictures" + fileName);
                // 添加数据库信息
                helper.AddItem(tbxName.Text.Trim(), Request.ApplicationPath + "\\Pictures" + fileName, "0", ViewState["ImgID"].ToString());
                // 显示上载成功的信息
                Response.Write("<script>window.alert('文件上传成功！')</script>");
            }
            catch (Exception ex)
            {
                Response.Write("<script>window.alert('由于网络原因，上载文件错误  " + ex.Message + "')</script>");
            }

            tbxName.Text = "";
        }
    }
    // 返回图片列表
    protected void btnBack_Click(object sender, EventArgs e)
    {
        Response.Redirect("~/List.aspx");
    }
}