How to insert & get images usin linq - linq

Question

First
id (int)
name (varchar)
picture (image)
Second
id (int)
post (varchar)
age (int)
I want to add a record in first table.
Then I want to combine these two table using id.
Then I want to fill a gridview where the post is "manager".
(Especially I want to know how to insert image to database and how to display them using grid view.)

Answer 1

To insert an image to your table , you can try something like this on click of your save button
string fileName = FileUpload1.FileName;
byte[] fileByte = FileUpload1.FileBytes;
Binary binaryObj = new Binary(fileByte);
DataClasses1DataContext context = new DataClasses1DataContext();
//mem_images is the name of the table you dragged , use your table name here
context.mem_images.InsertOnSubmit(new mem_image { mem_img=binaryObj });
context.SubmitChanges();
Response.Write("<script>alert('Image Has Been Saved Successfully'</script>);
To retrieve the image from the database table you will need to use a generic handler(.ashx) file , right click on your project and then go to add and then new item and finally Generic Handler.Here is the code for your .ashx file
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.IO;
namespace CwizBankApp
{
/// <summary>
/// Summary description for $codebehindclassname$
/// </summary>
public class ShowImage : IHttpHandler
{
public void ProcessRequest(HttpContext context)
{
//context.Response.ContentType = "text/plain";
// context.Response.Write("Hello World");
string id =context.Request.QueryString["Id"];
context.Response.ContentType = "image/jpeg";
Stream strm = ShowEmpImg(id);
byte[] buffer = new byte[4096];
int byteSeq = strm.Read(buffer, 0, 4096);
while (byteSeq > 0)
{
context.Response.OutputStream.Write(buffer, 0, byteSeq);
byteSeq = strm.Read(buffer, 0, 4096);
}
}
public Stream ShowEmpImg(string id)
{
DataClasses1DataContext context1 = new DataClasses1DataContext();
var r = (from a in context1.mem_images where a.image_id==id select a).First() ;
return new MemoryStream(r.mem_img.ToArray());
}
public bool IsReusable
{
get
{
return false;
}
}
}
}
Then finally in the click event of your show image or whatever do this
custImage1.ImageUrl = "~/ShowImage.ashx?Id="+textbox.text
Hope this helps you , if you have issues further , reply back