问题描述
在我的 ASP.NET 网络表单中,我有这个功能来下载我从数据库中获取的文件。 请如何更改它以在新的浏览器窗口中显示此文件?它主要是 pdf 或图像。
protected void DownloadFile(object sender,EventArgs e)
{
string id = (sender as LinkButton).CommandArgument;
byte[] bytes;
string fileName;
//string contentType;
string constr = WebConfigurationManager.AppSettings["inputsqlCon"];
using (sqlConnection con = new sqlConnection(constr))
{
using (sqlCommand cmd = new sqlCommand())
{
cmd.CommandText = @"SELECT ATTACH_NAME,ATTACH
FROM PA_REQ_NOTE_ATTACHMENTS
where ATTACH_ID = @Id";
cmd.Parameters.AddWithValue("@Id",id);
cmd.Connection = con;
con.open();
using (sqlDataReader sdr = cmd.ExecuteReader())
{
sdr.Read();
bytes = (byte[])sdr["ATTACH"];
//contentType = sdr["ContentType"].ToString();
fileName = sdr["ATTACH_NAME"].ToString();
}
con.Close();
}
}
Response.Clear();
Response.Buffer = true;
Response.Charset = "";
Response.Cache.SetCacheability(HttpCacheability.NoCache);
//Response.ContentType = contentType;
Response.AppendHeader("Content-disposition","attachment; filename=" + fileName);
Response.BinaryWrite(bytes);
Response.Flush();
Response.End();
}
解决方法
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