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  • 下载文档

    HTML:

     <table>
                <tr>
                    <td>
                        下载导入模板
                    </td>
                    <td>
                        <asp:LinkButton ID="lkbtn" runat="server" OnClick="lkbtn_Click">人才档案模板下载</asp:LinkButton>
                    </td>
                </tr>
     </table>

    下载按钮click事件:

     protected void lkbtn_Click(object sender, EventArgs e)
            {
                DownLoadFile(Server.MapPath("~/App_Data/人才档案模板.xls"), "人才档案模板.xls");
            }

    下载函数:

    /// <summary>
            /// 下载附件
            /// </summary>
            /// <param name="filepath">文件路径(包括文件名)</param>
            /// <param name="filename">文件名</param>
            public void DownLoadFile(string filepath, string filename)
            {
                if (!System.IO.File.Exists(filepath))
                {
                    JScript.AlertAfterLoad("未找到文件!");
                    return;
                }
                System.IO.FileStream iStream = null;
                byte[] buffer = new Byte[10000];
    
                int length;
                long dataToRead;
    
                try
                {
                    iStream = new System.IO.FileStream(filepath, System.IO.FileMode.Open,
                    System.IO.FileAccess.Read, System.IO.FileShare.Read);
                    dataToRead = iStream.Length;
                    Response.AddHeader("Connection", "Keep-Alive");
                    Response.ContentType = "application/octet-stream";
                    Response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(filename));
                    while (dataToRead > 0)
                    {
                        if (Response.IsClientConnected)
                        {
                            length = iStream.Read(buffer, 0, 10000);
                            Response.OutputStream.Write(buffer, 0, length);
                            Response.Flush();
                            buffer = new Byte[10000];
                            dataToRead = dataToRead - length;
                        }
                        else
                        {
                            dataToRead = -1;
                        }
                    }
                }
                catch (Exception)
                {
                    JScript.AlertAfterLoad("文件读取错误!");
                }
                finally
                {
                    if (iStream != null)
                    {
                        iStream.Close();
                    }
                }
            }
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  • 原文地址:https://www.cnblogs.com/fuge/p/2982480.html
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