How to get image from Image control and save into local directory as jpeg image in asp.net? - asp.net

Question

i am loading image from asp.net handler as below> handler fetches image using web service. Handler returns as bytes[] data.
<asp:Image ID="image1" ImageUrl="~/Handler1.ashx?id=1" runat="server"></asp:Image>
Now, I have image in the web page. I have save Image button in the web page. When button clicked, I want to save this image into local directory (c:\images) as a jpeg image. How to achieve this?

Answer 1

Try to use the following code for handler, which returns image data:
public class ImageHandler : IHttpHandler
{
public void ProcessRequest(HttpContext context)
{
bool isSave = !String.IsNullOrEmpty(context.Request["save"]);
int imgId;
if (String.IsNullOrEmpty(context.Request["id"]) || Int32.TryParse(context.Request["id"], out imgId))
throw new ArgumentException("No parameter specified");
byte[] imageData = LoadImageFromWebService(imgId); //load image from web service
context.Response.ContentType = "image/jpeg";
context.Response.AddHeader("Content-Length", imageData.Length.ToString());
context.Response.AddHeader("Content-Disposition", String.Format("{0} filename=image.jpeg", isSave ? "attachment;" : String.Empty));
context.Response.BinaryWrite(imageData);
context.Response.End();
}
public bool IsReusable
{
get
{
return false;
}
}
}
Change asp.net page as follows:
<asp:Image ID="Image1" ImageUrl="~/Handler1.ashx?id=1" runat="server"></asp:Image>
<asp:ImageButton ID="ImageButton1" OnClick="OnImageClick" runat="server" />
In this case your OnImageClick handler in page will be:
protected void OnImageClick(object sender, ImageClickEventArgs e)
{
Response.Redirect("~/Handler1.ashx?id=1&save=1");
}

Answer 2

I think that you must get the path of the image control
inside the click event
as
string path = image1.ImageUrl;
and then save it to the file
hope this helps you

Answer 3

public class ImageHandler : IHttpHandler
{
Users objimage = new Users();
public void ProcessRequest(HttpContext context)
{
Int32 theID;
if (context.Request.QueryString["Id"] != null)
theID = Convert.ToInt32(context.Request.QueryString["Id"]);
else
throw new ArgumentException("No parameter specified");
HttpResponse r = context.Response;
r.ContentType = "image/jpeg";
context.Response.ContentType = "image/jpeg";
objimage.imageId = theID; //select image using id
Stream strm = objimage.SelectImageByID(theID);
byte[] buffer = new byte[2048];
if (strm != null)
{
int byteSeq = strm.Read(buffer, 0, 2048);
while (byteSeq > 0)
{
context.Response.OutputStream.Write(buffer, 0, byteSeq);
byteSeq = strm.Read(buffer, 0, 2048);
}
}
else
{
r.WriteFile("~/img/img-profile.jpg");
}
}
public bool IsReusable
{
get
{
return false;
}
}
}