服务端按钮OnClick点两次才能执行。。。。

Question

本帖最后由 gwf25sz 于 2011-04-08 11:43:58 编辑

Answer 1

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;
using Telerik.WebControls;
using System.IO;namespace Honeywell
{
    public partial class FileList : System.Web.UI.Page
    {
        private HttpCookie cookie = null;
        private string userAccount = "";
        private string sql = "";
        private string sqlPath = "\\Uploads\\";
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                BindData();
            }
        }
        
        /// <summary>
        /// Bind datalist
        /// </summary>
        private void BindData()
        {
            if (Request.QueryString["prnum"] != null && Request.QueryString["prnum"].Trim() != "")
            {
                hfPRNumber.Value = Request.QueryString["prnum"].Trim();
                sql = "SELECT *,(SELECT EnglishName FROM PR_Users WHERE USERID=UploadBy) as EName FROM PR_Attachment WHERE PRNumber = '" + hfPRNumber.Value.Trim() + "'";
                DataTable dt = DBBase.GetDataTable(sql);
                dlList.DataSource = dt;
                dlList.DataBind();
            }
            if (Request.QueryString["status"] != null)
            {
                dvUp.Style.Add("display", "none;");
            }
        }        protected void dlList_ItemDataBound(object sender, DataListItemEventArgs e)
        {
            if (e.Item.ItemType == ListItemType.AlternatingItem || e.Item.ItemType == ListItemType.Item)
            {
                HiddenField hfUpBy = (HiddenField)e.Item.FindControl("hfUpBy");                cookie = Request.Cookies["adUser"];
                userAccount = cookie == null ? "test" : cookie["account"].Trim();
                LinkButton lbtn = (LinkButton)e.Item.FindControl("lbtnDelete");
                lbtn.Visible = hfUpBy.Value.Trim() == userAccount ? true : false;
                lbtn.Visible = Request.QueryString["status"] != null ? false : true;
            }
        }        protected void dlList_ItemCommand(object source, DataListCommandEventArgs e)
        {
            if (e.CommandName == "delete")
            {
                sql = "DELETE PR_Attachment WHERE ID = '" + dlList.DataKeys[e.Item.ItemIndex].ToString() + "'";
                DBBase.Update(sql);
                BindData();
                HiddenField hf = (HiddenField)e.Item.FindControl("hfAttachment");
                File.Delete(Server.MapPath(hf.Value));
                WebPage.ShowMessage("Delete success!");
            }
        }        protected void btnSave_Click(object sender, EventArgs e)
        {
            if(ffFile.Text == "")
            {
                WebPage.ShowMessage("Please select the file.");
                return;
            }
            if (txtDescription.Text == "")
            {
                WebPage.ShowMessage("Please add descriptions to the file you have uploaded.");
                return;
            }            string Path = Server.MapPath(@"~/Uploads/");            //如果路径不存在，则创建
            if (System.IO.Directory.Exists(Path) == false)
            {
                System.IO.Directory.CreateDirectory(Path);
            }
            
            //组合路径，file.GetName()取得文件名
            Path = Path + fupload.FileName;
            sqlPath += fupload.FileName;
            //保存
            fupload.SaveAs(Path);            cookie = Request.Cookies["adUser"];
            userAccount = cookie == null ? "test" : cookie["account"].Trim();
            string pNo = Request.QueryString["pno"] != null ? Request.QueryString["pno"].Trim() : "test";
            sql = "INSERT INTO PR_Attachment VALUES('" + pNo + "','" + fupload.FileName + "','" + fupload.PostedFile.ContentLength / 1024 + "','" + sqlPath + "','" + txtDescription.Text.Trim() + "','" + userAccount + "','" + DateTime.Now.ToString("MM/dd/yy") + "')";
            DBBase.Update(sql);
            BindData();
            WebPage.ShowMessage("Upload file success!");
        }        protected void btnSave_Command(object sender, CommandEventArgs e)
        {
            if (ffFile.Text == "")
            {
                WebPage.ShowMessage("Please select the file.");
                return;
            }
            if (txtDescription.Text == "")
            {
                WebPage.ShowMessage("Please add descriptions to the file you have uploaded.");
                return;
            }            string Path = Server.MapPath(@"~/Uploads/");            //如果路径不存在，则创建
            if (System.IO.Directory.Exists(Path) == false)
            {
                System.IO.Directory.CreateDirectory(Path);
            }            //组合路径，file.GetName()取得文件名
            Path = Path + fupload.FileName;
            sqlPath += fupload.FileName;
            //保存
            fupload.SaveAs(Path);            cookie = Request.Cookies["adUser"];
            userAccount = cookie == null ? "test" : cookie["account"].Trim();
            string pNo = Request.QueryString["pno"] != null ? Request.QueryString["pno"].Trim() : "test";
            sql = "INSERT INTO PR_Attachment VALUES('" + pNo + "','" + fupload.FileName + "','" + fupload.PostedFile.ContentLength / 1024 + "','" + sqlPath + "','" + txtDescription.Text.Trim() + "','" + userAccount + "','" + DateTime.Now.ToString("MM/dd/yy") + "')";
            DBBase.Update(sql);
            BindData();
            WebPage.ShowMessage("Upload file success!");
        }
    }
}

Answer 2

不是按钮的问题是 function setValue(){
            document.getElementById("ffFile").value = document.getElementById("fupload").value;
        }的问题input file 由于安全的原因，不允许 js 或其他方式的赋值，只能是用户自己点击

Answer 3

<input type="button" value="Browsing" onclick="document.getElementById('fupload').click();"
                    class="ltBtn" />
onclick="document.getElementById('fupload').click();"是这句的问题

Answer 4

function setValue(){
            document.getElementById("ffFile").value = document.getElementById("fupload").value;
        }解决方案 把这个逻辑在后台实现

Answer 5

http://blog.csdn.net/cpp2017/archive/2009/08/06/4418202.aspx给你贴一个慕白兄的例子吧 ~类似的有很多，可以自己搜索下。

Answer 6

我主要是想把浏览按钮的样式改掉。没想到会有这么多问题
我现在后台可以获取路径，但保存到服务器只能用 SaveAs,用File.Copy 是不行的File流写入也不行。。 而 FileUpload.FileName 永远是 ""

Answer 7

原因已经和你说过了，更改浏览按钮的样式是不能了，只能用div做个层放在file 上让用户以为点的不是file ，从而实现文件上传http://www.cnblogs.com/cloudgamer/archive/2008/10/20/1314766.html还有很多jq插件 或 采用flash 上传的组件

Answer 8

找到完美方案：
http://www.cnblogs.com/Charles2008/archive/2008/07/20/1247084.html结贴~