【下载文档:  asp.net 文件下载功能函数代码整理.txt 】

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asp.net 文件下载功能函数代码整理
复制代码 代码如下: public void FileDownLoadDel(string fullFilename) { System.IO.Stream iStream = null; // Buffer to read 10K bytes in chunk: byte[] buffer = new Byte[10000]; // Length of the file: int length; // Total bytes to read: long dataToRead; // Identify the file to download including its path. string filepath = fullFilename; filepath = Server.MapPath(filepath); // Identify the file name. string filename = System.IO.Path.GetFileName(filepath); try { // Open the file. iStream = new System.IO.FileStream(filepath, System.IO.FileMode.Open, System.IO.FileAccess.Read, System.IO.FileShare.Read); // Total bytes to read: dataToRead = iStream.Length; Response.ContentType = "application/octet-stream"; Response.AddHeader("Content-Disposition", "attachment; filename=" + filename); // Read the bytes. while (dataToRead > 0) { // Verify that the client is connected. if (Response.IsClientConnected) { // Read the data in buffer. length = iStream.Read(buffer, 0, 10000); // Write the data to the current output stream. Response.OutputStream.Write(buffer, 0, length); // Flush the data to the HTML output. Response.Flush(); buffer = new Byte[10000]; dataToRead = dataToRead - length; } else { //prevent infinite loop if user disconnects dataToRead = -1; Response.Clear(); } } Response.End(); //没有这句会将该页面刷新后的内容追加写入文件中。 } catch (Exception ex) { // Trap the error, if any. //Response.Write("Error : " + ex.Message); //base.WriteLog("资料", "下载资料:" + ex.Message + "!", LogType.Error, this.GetType().ToString()); } finally { if (iStream != null) { //Close the file. iStream.Close(); } File.Delete(fullFilename); } }