#region 下載文件
/// <summary>
/// 下載文件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void download_Click(object sender, EventArgs e)
{
try
{
// 獲取文件在服務器的地址
string filePath = Path.Combine(System.Configuration.ConfigurationManager.AppSettings["人員文件"], TemplatePath.Value);

// 判斷傳輸地址是否為空
if (!File.Exists(filePath))
{
this.ShowMassage("當前文件不存在或已經被刪除。");
return;
}

// url為文件名時，直接獲取文件名
string fileNames = TemplateName.Value;

// 以字符流的方式下載文件
FileStream fs = new FileStream(filePath, FileMode.Open);
byte[] bytes = new byte[(int)fs.Length];
fs.Read(bytes, 0, bytes.Length);
fs.Close();
Response.ContentType = "application/octet-stream";

// 兼容IE
if (Request.Browser.Browser == "IE")
{
int str = fileNames.IndexOf("#");
if (str > -1)
{
fileNames = HttpUtility.UrlEncode(fileNames, System.Text.Encoding.UTF8);
}
else
{
fileNames = HttpUtility.UrlPathEncode(fileNames);
}
}

// 通知瀏覽器下載
string headerValue = string.Format("attachment; filename=\"{0}\"", fileNames);
Response.AddHeader("Content-Disposition", headerValue);
Response.BinaryWrite(bytes);
Response.Flush();
Response.End();
}
catch (Exception ex)
{
this.ShowMassage("操作失敗：" + ex.Message);
}
}
#endregion

.Net下載文件