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gridview 模版列获取上传控件问题,如果用UpdatePanel就报错，这是为什么？ RRS feed

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    <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="CSharp.WebForm1" %>
 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" 
            onrowediting="GridView1_RowEditing" onrowupdating="GridView1_RowUpdating">
            <Columns>
                <asp:TemplateField HeaderText="图片" SortExpression="Img">
                    <ItemTemplate>
                        ss
                    </ItemTemplate>
                    <EditItemTemplate>
                        <asp:FileUpload ID="FileUpload1" runat="server" />
                    </EditItemTemplate>
                </asp:TemplateField>
                <asp:CommandField ShowEditButton="True" />
            </Columns>
        </asp:GridView>
            图片:<input type="file" runat="server" id="InputFile" style="width: 132px;" /><br />
            <asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />
    
    </div>
    </form>
</body>
</html>

    cs

    public partial class WebForm1 : System.Web.UI.Page
    {
        private static List<string> files = new List<string> {"a","n" };
 
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                GridView1.DataSource = files;
                GridView1.DataBind();
            }
        }
 
        protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
        {
            GridView1.EditIndex = e.NewEditIndex;
            GridView1.DataSource = files;
            GridView1.DataBind();
        }
 
        protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
        {
          string upFile = ((FileUpload)gdvData.Rows[e.RowIndex].FindControl("FileUpload1")).PostedFile.FileName;
            UpLoad(upFile);
            }
        protected void Button1_Click(object sender, EventArgs e)
        {
            UpLoad(InputFile.Value);
        }

        private string UpLoad(string img)
        {
            string pictureName = "";

            int idx = img.LastIndexOf('.');

            string suffx = img.Substring(idx);

            pictureName = DateTime.Now.Ticks.ToString() + suffx;

            if (img != "")
            {
                string path = Server.MapPath("Upload/Image/");

                InputFile.PostedFile.SaveAs(path + pictureName);
            }

            return pictureName;
        }
    
    }


    这段代码现在没什么问题，但我如果在gridview外层 添加个 UpdatePanel无刷新控件 ，那么在后台获取FileUpload1就会报错,这是为什么? 还有个问题，在gridview外放个上传控件，然后上传图片,OK没问题，但是在gridview里的那个上传控件 ，我如果上传图片，那么图片就是0KB，打开 提示“没有预览” 这又是为什么

    2012年7月17日 2:45
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