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图片上传

求把图片通过fileupload上传到站点目录,并通过gridview显示出来,求大仙指导啊!求具体代码 --------------------编程问答--------------------
引用 楼主 u010890621 的回复:
求把图片通过fileupload上传到站点目录,并通过gridview显示出来,求大仙指导啊!求具体代码


我的意思是往数据库里存图片的完整路径,并通过gridview显示出来。比如说网站发布后,网友随意上传图片,在网站后台都能通过gridview显示 --------------------编程问答-------------------- 这里是显示文件
 if (dt.ImageURL != "")
                    {
                        aimgshow.Src = "~/" + dt.ImageURL;
                    }

这里是保存文件代码:
if (FileUpload1.HasFile)
            {
                try
                {
                    string ImgType = System.IO.Path.GetExtension(FileUpload1.FileName).ToLower();
                    if (ImgType != ".png" && ImgType != ".jpg")
                    {
                        ClientScript.RegisterClientScriptBlock(GetType(), "", "<script>alert('图片格式不正确,请选择jpg或者png格式图片'); </script>");
                    }

                    else
                    {
                        string path = GetFileName() + ImgType;
                        FileUpload1.SaveAs(Server.MapPath("~/ClientBin") + "\\" + path);
                        imgUrl = "ClientBin" + "/" + path;
                    }
                }

                catch (Exception ex)
                {


                }

            }


下面是生成文件名称的代码:
/// <summary>
        /// 生成图片名称
        /// </summary>
        /// <returns></returns>
        public static string GetFileName()
        {
            Random rd = new Random();
            String serial = DateTime.Now.ToString("yyyyMMddHHmmss") + string.Format("{0, 000000}", rd.Next(100000, 999999).ToString());
            return serial;
        }
--------------------编程问答-------------------- gridview里弄一个image控件,路径='<%#Eval("url")%>' --------------------编程问答-------------------- 2楼的很详细了,3楼解释很到位,无奈 咱迟了 --------------------编程问答--------------------
引用 2 楼 HJ850126 的回复:
这里是显示文件
 if (dt.ImageURL != "")
                    {
                        aimgshow.Src = "~/" + dt.ImageURL;
                    }

这里是保存文件代码:
if (FileUpload1.HasFile)
            {
                try
                {
                    string ImgType = System.IO.Path.GetExtension(FileUpload1.FileName).ToLower();
                    if (ImgType != ".png" && ImgType != ".jpg")
                    {
                        ClientScript.RegisterClientScriptBlock(GetType(), "", "<script>alert('图片格式不正确,请选择jpg或者png格式图片'); </script>");
                    }

                    else
                    {
                        string path = GetFileName() + ImgType;
                        FileUpload1.SaveAs(Server.MapPath("~/ClientBin") + "\\" + path);
                        imgUrl = "ClientBin" + "/" + path;
                    }
                }

                catch (Exception ex)
                {


                }

            }


下面是生成文件名称的代码:
/// <summary>
        /// 生成图片名称
        /// </summary>
        /// <returns></returns>
        public static string GetFileName()
        {
            Random rd = new Random();
            String serial = DateTime.Now.ToString("yyyyMMddHHmmss") + string.Format("{0, 000000}", rd.Next(100000, 999999).ToString());
            return serial;
        }


不好意思 能把代码帖全吗?有好几个变量好像没定义 --------------------编程问答-------------------- 前台
<body>
    <form id="form1" runat="server">
    <div>
    
        <asp:Label ID="Label1" runat="server">选择图片:</asp:Label>
    
        <asp:FileUpload ID="FileUpload1" runat="server" />
        <br />
        <asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="确定" 
            Width="66px" />
        <br />
        <asp:Label ID="Label2" runat="server" Text="Label"></asp:Label>
        <br />
        <br />
        <asp:Label ID="Label3" runat="server" Text="Label"></asp:Label>
        <br />
        <asp:Image ID="Image1" runat="server" Height="328px" Width="449px" />
        <br />
    
    </div>
    </form>
</body>


后台

protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        if (this.FileUpload1.PostedFile.FileName == "")
        {
            this.Label1.Text = "您还没有选择图片";
            return;
        }
        else
        {
            string filepath = this.FileUpload1.PostedFile.FileName;
            string filename = filepath.Substring(filepath.LastIndexOf("\\")+1);
            string fileEX = filepath.Substring(filepath.LastIndexOf(".") + 1);
            string serverpath = Server.MapPath("File/") + filename;

            if (fileEX == "jpg" || fileEX == "bmp" || fileEX == "gif")
            {
                FileUpload1.PostedFile.SaveAs(serverpath);
                Image1.ImageUrl = "File/" + filename;
                Label1.Text = "上传成功!";
            }
            else
            {
                Label1.Text = "上传的图片扩展名错误!";
            }
        }
    } --------------------编程问答--------------------
引用 6 楼 lijinlong343 的回复:
前台
<body>
    <form id="form1" runat="server">
    <div>
    
        <asp:Label ID="Label1" runat="server">选择图片:</asp:Label>
    
        <asp:FileUpload ID="FileUpload1" runat="server" />
        <br />
        <asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="确定" 
            Width="66px" />
        <br />
        <asp:Label ID="Label2" runat="server" Text="Label"></asp:Label>
        <br />
        <br />
        <asp:Label ID="Label3" runat="server" Text="Label"></asp:Label>
        <br />
        <asp:Image ID="Image1" runat="server" Height="328px" Width="449px" />
        <br />
    
    </div>
    </form>
</body>


后台

protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        if (this.FileUpload1.PostedFile.FileName == "")
        {
            this.Label1.Text = "您还没有选择图片";
            return;
        }
        else
        {
            string filepath = this.FileUpload1.PostedFile.FileName;
            string filename = filepath.Substring(filepath.LastIndexOf("\\")+1);
            string fileEX = filepath.Substring(filepath.LastIndexOf(".") + 1);
            string serverpath = Server.MapPath("File/") + filename;

            if (fileEX == "jpg" || fileEX == "bmp" || fileEX == "gif")
            {
                FileUpload1.PostedFile.SaveAs(serverpath);
                Image1.ImageUrl = "File/" + filename;
                Label1.Text = "上传成功!";
            }
            else
            {
                Label1.Text = "上传的图片扩展名错误!";
            }
        }
    }


引用 6 楼 lijinlong343 的回复:
前台
<body>
    <form id="form1" runat="server">
    <div>
    
        <asp:Label ID="Label1" runat="server">选择图片:</asp:Label>
    
        <asp:FileUpload ID="FileUpload1" runat="server" />
        <br />
        <asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="确定" 
            Width="66px" />
        <br />
        <asp:Label ID="Label2" runat="server" Text="Label"></asp:Label>
        <br />
        <br />
        <asp:Label ID="Label3" runat="server" Text="Label"></asp:Label>
        <br />
        <asp:Image ID="Image1" runat="server" Height="328px" Width="449px" />
        <br />
    
    </div>
    </form>
</body>


后台

protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        if (this.FileUpload1.PostedFile.FileName == "")
        {
            this.Label1.Text = "您还没有选择图片";
            return;
        }
        else
        {
            string filepath = this.FileUpload1.PostedFile.FileName;
            string filename = filepath.Substring(filepath.LastIndexOf("\\")+1);
            string fileEX = filepath.Substring(filepath.LastIndexOf(".") + 1);
            string serverpath = Server.MapPath("File/") + filename;

            if (fileEX == "jpg" || fileEX == "bmp" || fileEX == "gif")
            {
                FileUpload1.PostedFile.SaveAs(serverpath);
                Image1.ImageUrl = "File/" + filename;
                Label1.Text = "上传成功!";
            }
            else
            {
                Label1.Text = "上传的图片扩展名错误!";
            }
        }
    }

往gridview里添加image控件后为什么在后台说imgurl没有定义呢
补充:.NET技术 ,  ASP.NET
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