Retrieve Images from fatabase

This is a sample code to retrieve images from data base in a gridview as to upload images to database.

use fileupload control to upload images and on upload button click retrieve image from fileupload control(named as fulimage)by writing

StreamimgStream = fuImage.PostedFile.InputStream;

and insert it into database along with other parameters.

to retrieve image from database in a gridview use generic handler. place a template in gridview and place itemtemplate in it.now add a image here like this.

and in the ImageHandler.ashx get image id from query string and retrive image from database in a datareader then return that image by this code

context.Response.BinaryWrite((Byte[])dr[0]);

here dr[0] means that image is in first field of the database.

Download the complete code here

Click here for source code

Download files in c#

This code shows how to download files of any type from applciation

private void DownloadFile( string fname)

{

try

{

string path = MapPath( fname );

string name = System.IO.Path.GetFileName( path );

string ext = System.IO.Path.GetExtension( path );

string type = "";

// set known types based on file extension

if ( ext != null )

{

switch( ext.ToLower() )

{

case ".htm":

case ".html":

type = "text/HTML";

break;

case ".txt":

type = "text/plain";

break;

case ".doc":

case ".rtf":

type = "Application/msword";

break;

case ".xml":

type = "Application/xml";

break;

case ".zip":

type = "application/zip";

break;

}

}

Response.AppendHeader( "content-disposition","attachment; filename=" + name );

if ( type != "" )

Response.ContentType = type;

Response.WriteFile( path );

}

catch(Exception ex)

{

new PowerXEditor.BL.CommonUtility().RegisterError(ex);

}

Response.End();

}