While going through a interview, a interviewer asked me this question which made me to think over it.
The question was:
I have a web page and i want that, if a user not perform any operation (enter text or select a item from dropdownList or any other such) for last 5 minutes on that page then he should be prompted by a message.
i answered the question but he was not looking satisfied. Later when i worked over it and got to...
Monday, March 28, 2011
Implementing two interfaces which define same function
Lets say we have two interfaces named "Intr1", "Iintr2" and both the interfaces contains a function named "myFunction()".
now lets say, we have a class named "myClass" and we are implementing both the interfaces in that class. so now because of rule of implementation, we will have to override/define all the function of interface "Intr1" and "Intr2" in class.
now the twist comes to story. as we have a function with same name...
Create thumbnail in c#
Many of times we requires to create a thumbnails images or we can say we wants to create a new image from existing one with different height and width. to do so below code will help you:
First of all create an object of image class and pass image url in it:
System.Drawing.Image objImage = System.Drawing.Image.FromFile(strFilename) ;
Now create thumbnail:
System.Drawing.Image.GetThumbnailImageAbort callback ;
callback =...
Tuesday, March 15, 2011
Insert item in listbox at top using javascript
many of times we have requirement to add a item at top of listbox using javascript (add item at index 0).
var txtl = document.getElementById("<%= txtvalue.ClientID %>");
var lst = document.getElementById("<%=mylistbox.ClientID %>");
if(txtl.value != "")
...
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