ASP.NET中下载文件的几种实例代码(2)

//以字符流的形式下载文件
        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";
        //通知浏览器下载文件而不是打开
        Response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8));
        Response.BinaryWrite(bytes);
        Response.Flush();
        Response.End();
    }

//----------------------------------------------------------

public void DownloadFile( System.Web.UI.Page WebForm,String FileNameWhenUserDownload ,String FileBody )
{

　　WebForm.Response.ClearHeaders();
　　WebForm.Response.Clear();
　　WebForm.Response.Expires = 0;
　　WebForm.Response.Buffer = true;
　　WebForm.Response.AddHeader("Accept-Language", "zh-tw");
　　//'文件名称
　　WebForm.Response.AddHeader("content-disposition", "attachment; filename='"+System.Web.HttpUtility.UrlEncode(FileNameWhenUserDownload, System.Text.Encoding.UTF8)+"'");
　　WebForm.Response.ContentType = "Application/octet-stream";
　　//'文件内容
　　WebForm.Response.Write(FileBody);//-----------
    WebForm.Response.End();
}

//上面这段代码是下载一个动态产生的文本文件，若这个文件已经存在于服务器端的实体路径，则可以通过下面的函数：

public void DownloadFileByFilePath( System.Web.UI.Page WebForm,String FileNameWhenUserDownload ,String FilePath )
{
　　WebForm.Response.ClearHeaders();
　　WebForm.Response.Clear();
　　WebForm.Response.Expires = 0;
    WebForm.Response.Buffer = true;
　　WebForm.Response.AddHeader("Accept-Language", "zh-tw");
　　//文件名称
　　WebForm.Response.AddHeader("content-disposition", "attachment; filename='" + System.Web.HttpUtility.UrlEncode(FileNameWhenUserDownload, System.Text.Encoding.UTF8) +"'" );
　　WebForm.Response.ContentType = "Application/octet-stream";
　　//文件内容
　　WebForm.Response.Write(System.IO.File.ReadAllBytes(FilePath));//---------
　　WebForm.Response.End();
}
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

--保存文档
string docName, docExtended;
Stream doc = fuDoc.FileContent;
int docLength = fuDoc.PostedFile.ContentLength;
byte[] docData = new byte[docLength];
doc.Read(docData, 0, docLength);
docExtended = fuDoc.FileName.Substring(fuDoc.FileName.IndexOf("."));
if (string.IsNullOrEmpty(tbDoc.Text))
docName = fuDoc.FileName;
else
docName = tbDoc.Text + docExtended;
SafetyDocInfo data = new SafetyDocInfo(ddlSort.Text, docName, fuDoc.PostedFile.ContentType, docData);
SafetyDoc safety = new SafetyDoc();
safety.Insert(data);
tbDoc.Text = string.Empty;
－－打开文档
public void ViewSafetyDoc(string pDocSort, string pDocName)
{
OracleParameter[] parms = GetSafetyDocParm(SQL_View_SafetyDoc);
parms[0].Value = pDocSort;
parms[1].Value = pDocName;
using (OracleDataReader rdr = OracleHelper.ExecuteReader(OracleHelper.ConnectionString, CommandType.Text, SQL_View_SafetyDoc, parms))
{
while (rdr.Read())
{
HttpContext.Current.Response.Clear();
HttpContext.Current.Response.Buffer = true;
HttpContext.Current.Response.Charset = "GB2312";
HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
HttpContext.Current.Response.ContentType = rdr.GetString(1);
HttpContext.Current.Response.BinaryWrite((byte[])rdr["Doc"]);
string FileName = rdr.GetString(0);
FileName = System.Web.HttpUtility.UrlEncode(FileName, System.Text.Encoding.UTF8);
HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment;filename=" + FileName);
}
}
}