Comments by SoumenBanerjee (Top 23 by date)

did you populate dropdownlists on page_load from code behined?
If so this can be happen if these code are out side Ispostback checking
if(!Ispostback)
{
......
populate dropdownlist
......
}

in conditional statement assignment part must be in left hand side part
so you have to write like this
radYes.Checked =.....

can you please explain..

so can you please explain "some duplicate entry"

you have found example with code to use, so now what is your requirement?

You can try this..
if (!Page.IsPostBack)
txtName.Focus();

I think delete all data from table then insert will insert from ID 4, use truncate rather than using delete

You can find more in this link

http://msdn.microsoft.com/en-us/library/windows/desktop/aa394373%28v=vs.85%29.aspx

To execute some method from code behind with javascript method

http://www.codeproject.com/Articles/238866/Invoke-Server-Methods-From-Client-Side-Using-JQuer
http://www.c-sharpcorner.com/UploadFile/abhikumarvatsa/calling-an-Asp-Net-C-Sharp-method-web-method-using-javascript/

http://www.dotnetcurry.com/ShowArticle.aspx?ID=109
Hope these can help...

View this link
http://msdn.microsoft.com/en-us/library/ms132474.aspx

Please find these link. This will help you to understand hidden-feild better

http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.hiddenfield.aspx

http://msdn.microsoft.com/en-us/library/75x4ha6s%28v=vs.100%29.aspx

yes for that you have to change onclientclick as

OnClientClick="if (Page_ClientValidate()){ return confirm('thank you for registering and do u wish to login now?')}"

This will first validate then if page validation succeed then call confirm box otherwise show only validation error message.

Sure,
my email id:- soumenbane@gmail.com

I have tried to add one simple solution which have 2 textboxes ina page and I am storing their id,value in a list and display them in grid then export to excel, please try if this code helps you...

Do you need code for storing controls id and values and exporting it into excel, please explain..

No I don't have any memory related info, The most common cause is encoding errors and escaping problematic characters ("<" becomes "<", "&" becomes "&", etc.)

I think you can store count of controls or controls id with value in dictonary as key value pare or in a list and store it into session (if needed) when page is active then export into excel or store in database.

Welcome and Thanks againg