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saifullah khan
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335
300.3k
Parameter is not valid.
Oct 27 2011 6:14 AM
i have a ppt file which i have converted from ppt to image and then save it in db. it save successfully. then i retrieve it from db but it gives and error:
parameter is not valid
Image imag = Image.FromStream(stream);
here is the code for saving in db:
protected void Button1_Click(object sender, EventArgs e)
{
ApplicationClass pptApplication = new ApplicationClass();
Presentation pptPresentation = pptApplication.Presentations.Open("saifullah.ppt", MsoTriState.msoFalse,
MsoTriState.msoFalse, MsoTriState.msoFalse);
var slides = new List<string>();
for (var i = 1; i <= pptPresentation.Slides.Count; i++)
{
string target = i+".jpeg".ToString();
pptPresentation.Slides[i].Export(target, "jpg", width, height);
string pic = target;
con.Open();
cmd = new SqlCommand("insert into images values('"+@pic+"')",con);
cmd.ExecuteNonQuery();
con.Close();
}
pptPresentation.Close();
}
and here is for retreiving from db.
MemoryStream stream = new MemoryStream();
try
{
con.Open();
cmd = new SqlCommand("select pics from images", con);
byte[] image = (byte[])cmd.ExecuteScalar();
stream.Write(image, 0, image.Length);
Image imag = Image.FromStream(stream);
Response.ContentType = "image/JPEG";
imag.Save(Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg);
}
finally
{
con.Close();
stream.Close();
}
please tell me what i need to correct
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