如何在c中回发后将镜像路径绑定到镜像上传控件

本文关键字：镜像 绑定 路径 控件 | 更新日期: 2023-09-27 18:28:10

我正在尝试将该图像路径绑定到图像上传控件（页面刷新后），该控件保存在会话和视图状态中，但缺少某些内容，无法处理该内容。。。存储了正确路径但未绑定的会话和视图状态。只需要解决这个问题。。。

正在获取异常"无法将类型为"System.String"的对象强制转换为类型为"System.Web.UI.WebControls.FileUpload".

fuUploadLogo是我的图像上传控件，倒数第二行无法将会话中的路径绑定到fileupload控件。

asp:FileUpload ID="fuUploadLogo"runat="server"

        if (Session["PicturePath1"] == null)
        {
            Session["PicturePath1"] = ViewState["PicturePath"].ToString();
        }
        else if (Session["PicturePath1"] != null)
        {
            fuUploadLogo = (FileUpload)Session["PicturePath1"];                
        }

如何在c中回发后将镜像路径绑定到镜像上传控件

我认为您应该添加图像控件来查看您的图像，例如：

在aspx中，添加

 <asp:Image ID="Image1" runat="server" />

在aspx.cs 中

Image1.ImageUrl=Convert.ToString(ViewState["PicturePath"]);

请像下面的一样尝试

<asp:FileUpload ID="fileupload1" runat="server"></asp:FileUpload>
         //If first time page is submitted and we have file in FileUpload control but not in session 
        // Store the values to SEssion Object 
        if (Session["PicturePath"] == null && FileUpload1.HasFile)  
        { 
            Session["PicturePath"] = FileUpload1.PostedFile.FileName; 
        } 
        // Next time submit and Session has values but FileUpload is Blank 
        // Return the values from session to FileUpload 
        else if (Session["PicturePath"] != null && (! FileUpload1.HasFile)) 
        { 
            FileUpload1 = (FileUpload) Session["PicturePath"]; 
        } 
        // Now there could be another sictution when Session has File but user want to change the file 
        // In this case we have to change the file in session object 
        else if (FileUpload1.HasFile) 
        { 
            Session["PicturePath"] = FileUpload1.PostedFile.FileName; 
        }
相关文章：