问题描述:asp.net2.0
有一个如下格式的excel模板
[1,1] | [1,2] | [1,3] |
[2,1] | [2,2] | [2,3] |
[3,1] | [3,2] | [3,3] |
当用户点击下载的时候,我就把模板中的[n,n]格式的数据替换成数据库中的数据后下载
我是这样的做的
用StreamReader sr=new StreamReader(filepath),
一次读取一行,
sr.readLine();
然后替换其中的[n,n]
读取完后
response.SetContentType("");
response.write("");
response.end();
出现错误:
下载的excel中是乱码
求正确的做法
excel 是二进制文件,不是文本文件,建议以二进制方式读取并发送给浏览器,不要用 ReadLine 这种方式读,否则肯定会有乱码。
设置了编码格式了吗?
你可以试试这个:
StreamReader read = new StreamReader(@"x:\*.xx",System.Text.Encoding.GetEncoding("GB2312"));
用下面的方法: ResponseFile(下载后的文件名,要下载的文件全路径,允许的下载速度),很方便。
/// <summary>
/// 输出硬盘文件,提供下载
/// </summary>
/// <param name="_fileName">下载文件名</param>
/// <param name="_fullPath">带文件名下载路径</param>
/// <param name="_speed">每秒允许下载的字节数</param>
/// <returns>返回是否成功</returns>
public static bool ResponseFile(string _fileName, string _fullPath, long _speed)
{
HttpRequest _Request = System.Web.HttpContext.Current.Request;
HttpResponse _Response = System.Web.HttpContext.Current.Response;
try
{
FileStream myFile = new FileStream(_fullPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
BinaryReader br = new BinaryReader(myFile);
try
{
_Response.AddHeader("Accept-Ranges", "bytes");
_Response.Buffer = false;
long fileLength = myFile.Length;
long startBytes = 0;
int pack = 10240; //10K bytes
//int sleep = 200; //每秒5次 即5*10K bytes每秒
int sleep = (int)Math.Floor((decimal)1000 * pack / _speed) + 1;
if (_Request.Headers["Range"] != null)
{
_Response.StatusCode = 206;
string[] range = _Request.Headers["Range"].Split(new char[] { '=', '-' });
startBytes = Convert.ToInt64(range[1]);
}
_Response.AddHeader("Content-Length", (fileLength - startBytes).ToString());
if (startBytes != 0)
{
_Response.AddHeader("Content-Range", string.Format(" bytes {0}-{1}/{2}", startBytes, fileLength - 1, fileLength));
}
_Response.AddHeader("Connection", "Keep-Alive");
_Response.ContentType = "application/octet-stream";
_Response.Charset = "UTF-8";
_Response.ContentEncoding = Encoding.UTF8;
_Response.AddHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(_fileName, Encoding.UTF8));
br.BaseStream.Seek(startBytes, SeekOrigin.Begin);
int maxCount = (int)Math.Floor((decimal)(fileLength - startBytes) / pack) + 1;
for (int i = 0; i < maxCount; i++)
{
if (_Response.IsClientConnected)
{
_Response.BinaryWrite(br.ReadBytes(pack));
Thread.Sleep(sleep);
}
else
{
i = maxCount;
}
}
_Response.End();
}
catch
{
return false;
}
finally
{
br.Close();
myFile.Close();
}
}
catch (Exception err)
{
return false;
}
return true;
}