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POhow to retrieve and display image from database in asp.net
 

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  1. POhow to retrieve and display image from database in asp.net
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    <p>I am going to show images from database as the user input image id. and I have to show it in picture box below it.</p> <p>I used this code to convert base64string to image</p> <pre><code>using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; public partial class _Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { if (Request.QueryString["ImageID"] != null) { string ImgData = Request.QueryString["ImageID"].ToString(); Byte[] bytes = Convert.FromBase64String(ImgData); Response.Buffer = true; Response.Charset = ""; Response.Cache.SetCacheability(HttpCacheability.NoCache); Response.ContentType = "image/jpg"; Response.AddHeader("content-disposition", "attachment;"); Response.BinaryWrite(bytes); Response.Flush(); Response.End(); } } } </code></pre> <p>and my main webpage sourcecode is</p> <pre><code>protected void Button1_Click(object sender, EventArgs e) { NpgsqlCommand cmd = null; string selPhoto = @"select * from photodetails where photoid=@photoid"; System.Drawing.Image newImage; string tempfilename=@"C:\Users\Public\temp_image"; try { cmd = new NpgsqlCommand(selPhoto, con); cmd.Parameters.Add("@photoid",Convert.ToInt16(txtpid.Text)); if (con.State == ConnectionState.Open) con.Close(); con.Open(); NpgsqlDataReader drphoto = cmd.ExecuteReader(); while (drphoto.Read()) { //System.IO.Stream fs = FileUpload1.PostedFile.InputStream; //System.IO.BinaryReader br = new System.IO.BinaryReader(fs); Byte[] bytes = (byte[])drphoto["photo_bytearr"]; //br.ReadBytes((Int32)fs.Length); string base64String = Convert.ToBase64String(bytes, 0, bytes.Length); img1.ImageUrl = @"http://localhost:29450/SampleWeb/showimg.aspx?ImageData=" + Convert.ToBase64String(bytes); } } catch (Exception ex) { } } </code></pre> <p>but still it doesn't showing image?</p>
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    1. USLaxmikant Dange
    1. USLaxmikant Dange
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    1. COActually, there are dozens of related posts. Just give the site a search.
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      1. POhow to retrieve and display image from database in asp.net
      1. USmelancia
    2. COImages will usually be too big to save in the query string, which has a max length (depending on the browser, but IE has a max of 2000, FF 64K), so you need to come up with a better design.
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      1. POhow to retrieve and display image from database in asp.net
      1. USKlaus Byskov Pedersen
    3. CODo a google search for "How to display an image in ASP.NET" Somewhere among the 40 million responses I'm sure you'll find the answer. Probably in the first 2-3 links.
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      1. POhow to retrieve and display image from database in asp.net
      1. USPete
 

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A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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