好的，
基本上我已经能够使用 asp.net 和 c# 将文件上传到 SQL 服务器数据库。我可以在浏览器中查看它们没有问题，但是当我下载它们时，它们似乎丢失了它们的原始格式，例如 word 文档丢失了它们的 docx 扩展名，您必须选择手动将它们作为 word 文档打开。
到目前为止，这是我的代码
//Method used to upload a file to the database
protected void UploadBut_Click(object sender, EventArgs e)
{
Stream inpStream = DocumentsUploadControl.PostedFile.InputStream;
BinaryReader br = new BinaryReader(inpStream);
Byte[] size = br.ReadBytes ((int)inpStream.Length);
using (SqlConnection conn = new SqlConnection("Data Source=conn\\sqlexpress;Initial Catalog=new catalog;Integrated Security=True"))
{
string sql = "INSERT INTO Attachments(AttachmentReferenceID, AttachmentType, Filename, AttachmentDescription, FileUploadedBy, UploadDate)" +
"values (@Reference, @Type, @Filename, @Descr, @UploadedBy, @UploadedDate)";
using (SqlCommand cmd = new SqlCommand(sql, conn))
{
cmd.Parameters.AddWithValue("@Reference", ReferenceDDL.Text.Trim());
cmd.Parameters.AddWithValue("@Type", DocumentsUploadControl.PostedFile.ContentType.ToString());
cmd.Parameters.AddWithValue("@Filename", FilenameTB.Text.Trim());
cmd.Parameters.AddWithValue("@Descr", size);
cmd.Parameters.AddWithValue("@UploadedBy", Session["username"].ToString());
cmd.Parameters.AddWithValue("@UploadedDate", DateTime.Now.Date.ToShortDateString());
conn.Open();
cmd.ExecuteNonQuery();
conn.Close();
Response.Redirect("Documents.aspx");
}
}
}
//listener used to download the file
protected void lnkDownload_Click(object sender, EventArgs e)
{
LinkButton lnkbtn = sender as LinkButton;
GridViewRow gvrow = lnkbtn.NamingContainer as GridViewRow;
int fileId = Convert.ToInt32(DocumentsGridView.DataKeys[gvrow.RowIndex].Value.ToString());
using (SqlConnection conn = new SqlConnection("Data Source=conn\\sqlexpress;Initial Catalog=new catalog;Integrated Security=True"))
{
string sql = "SELECT AttachmentReferenceID, AttachmentType, Filename, AttachmentDescription, FileUploadedBy, UploadDate FROM Attachments WHERE AttachmentID=@ID";
using (SqlCommand cmd = new SqlCommand(sql, conn))
{
cmd.Parameters.AddWithValue("@ID", fileId);
conn.Open();
SqlDataReader dr = cmd.ExecuteReader();
if (dr.Read())
{
Response.ContentType = dr["AttachmentType"].ToString();
Response.AddHeader("Content-Disposition", "attachment;filename=\"" + dr["Filename"] + "\"");
Response.BinaryWrite((byte[])dr["AttachmentDescription"]);
Response.End();
conn.Close();
}
}
}
}