asp.net 上传文件

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Add_UpdateSoftVersion.aspx.cs" Inherits="WebApp.Add_UpdateSoftVersion" %>

<!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>
    <script type="text/javascript" language="javascript">
        function addForm() {
            var strForm = "<input type='file' size='50' name='File' /><br/>"
            document.getElementById('MyFile').insertAdjacentHTML("beforeEnd", strForm)
        }
    </script>

</head>
<body>
    <form id="form1" runat="server" enctype="multipart/form-data">
    <div>
    
        <table style="width:100%;">
            <tr>
                <td>
                    <asp:Label ID="Label2" runat="server" Text="设备类型:"></asp:Label>
                </td>
                <td>
                    <asp:TextBox ID="txt_DeviceTypeId" runat="server"></asp:TextBox>
                </td>
                <td>
                     </td>
            </tr>
            <tr>
                <td>
                    <asp:Label ID="Label4" runat="server" Text="文件类型:"></asp:Label>
                </td>
                <td>
                    <asp:TextBox ID="txt_FileTypeId" runat="server"></asp:TextBox>
                </td>
                <td>
                     </td>
            </tr>
            <tr>
                <td>
                    <asp:Label ID="Label8" runat="server" Text="软件主版本编号:"></asp:Label>
                </td>
                <td>
                    <asp:TextBox ID="txt_SoftVersion" runat="server"></asp:TextBox>
                </td>
                <td>
                     </td>
            </tr>
            <tr>
                <td>
                    <asp:Label ID="Label10" runat="server" Text="次版本编号:"></asp:Label>
                </td>
                <td>
                    <asp:DropDownList ID="ddl_VersionType" runat="server">
                        <asp:ListItem Value="0">A</asp:ListItem>
                        <asp:ListItem Value="1">B</asp:ListItem>
                    </asp:DropDownList>
                </td>
                <td>
                     </td>
            </tr>
            <tr>
                <td>
                    <asp:Label ID="Label5" runat="server" Text="添加时间:"></asp:Label>
                </td>
                <td>
                    <asp:TextBox ID="txt_AddTime" runat="server" Enabled="False"></asp:TextBox>
                </td>
                <td>
                     </td>
            </tr>
            <tr>
                <td>
                    <asp:Label ID="Label6" runat="server" Text="录入人员:"></asp:Label>
                </td>
                <td>
                    <asp:TextBox ID="txt_UserId" runat="server" Enabled="False"></asp:TextBox>
                </td>
                <td>
                     </td>
            </tr>
            <tr>
                <td>
                    <asp:Label ID="Label9" runat="server" Text="文件名:"></asp:Label>
                </td>
                <td>
                    <asp:TextBox ID="txt_FileName" runat="server"></asp:TextBox>
                </td>
                <td>
                     </td>
            </tr>
            <tr>
                <td>
                    <asp:Label ID="Label7" runat="server" Text="成功升级次数:"></asp:Label>
                </td>
                <td>
                    <asp:TextBox ID="txt_UpdateCount" runat="server" Enabled="False">0</asp:TextBox>
                </td>
                <td>
                     </td>
            </tr>
            <tr>
                <td>
                     </td>
                <td>
                    <asp:Button ID="btnAdd" runat="server" Height="35px" onclick="btnAdd_Click" 
                        Text="添加" Width="81px" />
                </td>
                <td>
                     </td>
            </tr>
        </table>

    </div>

    <div>
       <p id="MyFile">
          <input type="file" size="50" name="File" />
    </p>
    <p>
          <input type="button" value="增加一个" onclick="addForm()" />
          
          <asp:Button Runat="server" Text="开始上传" ID="UploadButton" 
                onclick="UploadButton_Click">
          </asp:Button>
          
          <input onclick="this.form.reset()" type="button" value="重 置" />
          <br />
          <asp:Label ID="Label1" runat="server"></asp:Label>
    </p>
    </div>
    </form>
</body>
</html>
  protected void UploadButton_Click(object sender, EventArgs e)
        {
            SaveFiles();
        }

        private void SaveFiles()
        {
            //遍历表单元素
            HttpFileCollection files = HttpContext.Current.Request.Files;

            //状态信息
            string strout = "<br>上传的文件分别是:<hr color=red><table style='width: 500px;'>";
            strout += "<tr><td>文件类型</td><td>客户端地址</td><td>上传文件名</td><td>扩展名</td></tr>";
            try
            {
                for (int iFile = 0; iFile < files.Count; iFile++)
                {
                    //访问单独文件
                    HttpPostedFile postedFile = files[iFile];
                    string fileName, fileExtension;

                    fileName = System.IO.Path.GetFileName(postedFile.FileName);

                    if (fileName != "")
                    {
                        fileExtension = System.IO.Path.GetExtension(fileName);

                        strout += "<tr><td>" + postedFile.ContentType.ToString() + "</td>";
                        strout += "<td>" + postedFile.FileName + "</td>";
                        strout += "<td>" + fileName + "</td>";
                        strout += "<td>" + fileExtension + "</td></tr>";

                        postedFile.SaveAs(Server.MapPath("DtuUpdateFile/") + fileName);
                    }
                    else
                    {
                        strout = "<br>请您选择一个文件!!!";
                    }
                }

                Label1.Text = strout.ToString();

            }
            catch (Exception Ex)
            {
                Label1.Text = Ex.ToString();
            }
        }



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