Saving a uploaded image in asp.net c#

Question

4.00/5 (1 vote)

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Hi,

I uploaded a image into a webpage in asp.net using fileupload control.Now when I am refreshing the page or logging out the page the image disappears.Can anyone help me in this issue.

Thanks in advance...
http://www.codeproject.com/script/Answers/Post.aspx?aid=464791#
aspx.cs

C#

protected void Button2_Click(object sender, EventArgs e)
{
    string path = Server.MapPath(&quot;croppedImages/&quot;);
    if(FileUpload1.HasFile)
    {
        string ext=Path.GetExtension(FileUpload1.FileName);
        if (ext== &quot;.jpg&quot; || ext== &quot;.png&quot;)
        {
            FileUpload1.SaveAs(path+FileUpload1.FileName);
            string name = &quot;~/croppedImages/&quot; + FileUpload1.FileName;
            string s = &quot;insert into immage values(&#39;&quot;+TextBox1.Text.Trim()+&quot;&#39;,&#39;&quot;+name+&quot;&#39;)&quot;;

            SqlCommand cmd= new SqlCommand(s,con);
            con.Open();
            cmd.ExecuteNonQuery();
            con.Close();
            Response.Write(&quot;Your file has been uploaded&quot;);
        }
        else
        {
            Response.Write(&quot;You can upload only jpg and png files&quot;);
        }
    }
    else
    {
        Response.Write(&quot;Please select a file&quot;);
    }
    Session[&quot;ImageBytes&quot;] = FileUpload1.FileBytes;
    ImagePreview.ImageUrl = &quot;~/Handler.ashx&quot;;

}

Posted 24-Sep-12 5:00am

Raghavanand

Updated 24-Sep-12 6:11am

Mohamed Mitwalli

v3

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Christiaan Rakowski · Accepted Answer · 2012-09-24T05:15:00

Solution 1

The FileUpload control does nothing other than upload the file. When it is performing it's postback you need to save the data to the harddisk for permanent storage.
On page refresh you will need to load the image from the disk again, you can use the asp:Image tag to display it.

See the sample at the bottom of this page for saving a file to the disk using the FileUpload control: http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.fileupload(v=vs.100).aspx[^]

Hope this helps you on your way.

Posted 24-Sep-12 5:15am

Christiaan Rakowski

Comments

Raghavanand 24-Sep-12 11:55am

Thanks for your kind reply. My code save the image in filesystem and the path in database.Yet it goes away on page refresh. I will send you the code for your reference

Christiaan Rakowski 24-Sep-12 12:52pm

At the end of this method you set ImagePreview.ImageUrl = "~/Handler.ashx";
I assume this handler will return the image, if so you will have to do the same in the PageLoad method of the page, just copy that 1 line over to there and it should be good.

Small extra advice: jpeg (with the e) is also a valid jpg image, adding that to your check is probably a good idea.

Raghavanand 25-Sep-12 2:05am

Thanks a lot Sir.. It worked ..

Raghavanand 25-Sep-12 2:10am

I have one more problem sir
"System.Drawing.Image ImagePreview = Bitmap.FromFile(@"\croppedimages\", true);"
The above line is showing a file not found exception. I would be really thankful if you help me in this matter

Christiaan Rakowski 25-Sep-12 3:12am

When you are in ASP the using relative directory doesn't work (most of the time). You have to use string folder = HttpContext.Current.Server.MapPath("/croppedimages/"); to get the folder, then open the image with Bitmap.FromFile(folder + filename, true);

Raghavanand 26-Sep-12 9:33am

still the problem continues...
This is the one
string imagePath = Server.MapPath("/croppedimages/");
System.Drawing.Image imgToCrop = Bitmap.FromFile("~/croppedImages/" + FileUpload1.FileName);

Christiaan Rakowski 26-Sep-12 17:17pm

MapPath only returns a string with the full path to the folder you gave it, so starting at the drive letter all the way down. In the method Bitmap.FromFile you will need to use the imagePath variable instead of the string. The final code should be:

string imagePath = Server.MapPath("/croppedimages/");
System.Drawing.Image imgToCrop = Bitmap.FromFile(imagePath + FileUpload1.FileName);

Raghavanand 28-Sep-12 2:15am

I am getting a invalid Operation exception with error message failed to map path here
"string imagePath = Server.MapPath("/CroppedImages");"

Christiaan Rakowski 28-Sep-12 2:23am

That's very strange, I have never had that error before, and according to the MSDN article it doesn't even throw InvalidOperationExceptions. Are you sure it's from this line? What does the stacktrace say?