while i am retrieving the image from the db table i am getting the below error.image is stored in the table in binary format

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byte[] bytes = (byte[])drc[0]["img"];

here drc is the data row collection

erro info:

Unable to cast object of type 'System.DBNull' to type 'System.Byte[]'.

Posted 11-Apr-12 23:00pm

syedkhaleel

Updated 11-Apr-12 23:01pm

sravani.v

v2

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OriginalGriff · Answer 1 · 2012-04-11T23:04:00

Solution 1

It's pretty obvious: the error message is very explicit.
Your SQL query is returning an empty field for "img" on row 0.

Either your database does not contain an image, or your query is wrong.

Posted 11-Apr-12 23:04pm

OriginalGriff

Jαved · Answer 2 · 2012-04-11T23:31:00

to do it in markup:

ASP.NET

<telerik:radbinaryimage runat="server" id="rbi" datavalue="<%# ((System.Data.Linq.Binary) Eval("imageFull")).ToArray() %>" xmlns:telerik="#unknown" />

or do it dynamically:

C#

var product = (from p in products
               select p).First();//.First() = LIMIT 1 in sql, which in turn makes the product variable singular and usable like this:
rsi.DataValue = product.imageFull.ToArray();